Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- KavaERC20
- Optimization enabled
- true
- Compiler version
- v0.8.17+commit.8df45f5f
- Optimization runs
- 500
- Verified at
- 2023-03-06T06:45:55.473785Z
contracts/KavaERC20.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import { IAxelarGateway } from '@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol'; import { IAxelarGasService } from '@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol'; import { IERC20CrossChain } from './IERC20CrossChain.sol'; import { ERC20Upgradeable } from '@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol'; import { AxelarExecutable } from '@axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol'; import { OwnableUpgradeable } from '@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol'; import { StringToAddress, AddressToString } from '@axelar-network/axelar-gmp-sdk-solidity/contracts/utils/AddressString.sol'; contract KavaERC20 is AxelarExecutable, ERC20Upgradeable, OwnableUpgradeable { using StringToAddress for string; using AddressToString for address; string public destinationAddress; event FalseSender(string sourceChain, string sourceAddress); IAxelarGasService public gasService; function initialize(address gateway_, address gasReceiver_) external initializer { AxelarExecutable__init(gateway_); __ERC20_init('kavaERC20', 'kavaERC20'); __Ownable_init(); gasService = IAxelarGasService(gasReceiver_); } function setDestinationAddress(string memory destinationAddress_) public onlyOwner { destinationAddress = destinationAddress_; } // This is for testing. function giveMe(uint256 amount) external { _mint(msg.sender, amount); } function transferRemote( uint256 amount ) public payable { _burn(msg.sender, amount); bytes memory payload = abi.encode(msg.sender, amount); if (msg.value > 0) { gasService.payNativeGasForContractCall{ value: msg.value }( address(this), "Fantom", destinationAddress, payload, msg.sender ); } gateway.callContract("Fantom", destinationAddress, payload); } function _execute( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) internal override { (address to, uint256 amount) = abi.decode(payload, (address, uint256)); _mint(to, amount); } function contractId() external pure returns (bytes32) { return keccak256('example'); } }
contracts/IERC20CrossChain.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import { IERC20Upgradeable } from '@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol'; interface IERC20CrossChain is IERC20Upgradeable { function transferRemote( string calldata destinationChain, address destinationAddress, uint256 amount ) external payable; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol'; import { IAxelarExecutable } from '../interfaces/IAxelarExecutable.sol'; contract AxelarExecutable is IAxelarExecutable { IAxelarGateway public gateway; // constructor(address gateway_) { // if (gateway_ == address(0)) revert InvalidAddress(); // // gateway = IAxelarGateway(gateway_); // } function AxelarExecutable__init(address gateway_) internal { if (gateway_ == address(0)) revert InvalidAddress(); gateway = IAxelarGateway(gateway_); } function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external { bytes32 payloadHash = keccak256(payload); if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash)) revert NotApprovedByGateway(); _execute(sourceChain, sourceAddress, payload); } function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external { bytes32 payloadHash = keccak256(payload); if ( !gateway.validateContractCallAndMint( commandId, sourceChain, sourceAddress, payloadHash, tokenSymbol, amount ) ) revert NotApprovedByGateway(); _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount); } function _execute( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) internal virtual {} function _executeWithToken( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) internal virtual {} }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from './IAxelarGateway.sol'; interface IAxelarExecutable { error InvalidAddress(); error NotApprovedByGateway(); function gateway() external view returns (IAxelarGateway); function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external; function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // This should be owned by the microservice that is paying for gas. interface IAxelarGasService { error NothingReceived(); error InvalidAddress(); error NotCollector(); error InvalidAmounts(); event GasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, address gasToken, uint256 gasFeeAmount, address refundAddress ); event GasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress); event ExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress ); // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; function addGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function addExpressGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeExpressGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function collectFees( address payable receiver, address[] calldata tokens, uint256[] calldata amounts ) external; function refund( address payable receiver, address token, uint256 amount ) external; function gasCollector() external returns (address); }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IAxelarGateway { /**********\ |* Errors *| \**********/ error NotSelf(); error NotProxy(); error InvalidCodeHash(); error SetupFailed(); error InvalidAuthModule(); error InvalidTokenDeployer(); error InvalidAmount(); error InvalidChainId(); error InvalidCommands(); error TokenDoesNotExist(string symbol); error TokenAlreadyExists(string symbol); error TokenDeployFailed(string symbol); error TokenContractDoesNotExist(address token); error BurnFailed(string symbol); error MintFailed(string symbol); error InvalidSetMintLimitsParams(); error ExceedMintLimit(string symbol); /**********\ |* Events *| \**********/ event TokenSent( address indexed sender, string destinationChain, string destinationAddress, string symbol, uint256 amount ); event ContractCall( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload ); event ContractCallWithToken( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload, string symbol, uint256 amount ); event Executed(bytes32 indexed commandId); event TokenDeployed(string symbol, address tokenAddresses); event ContractCallApproved( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, bytes32 sourceTxHash, uint256 sourceEventIndex ); event ContractCallApprovedWithMint( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, bytes32 sourceTxHash, uint256 sourceEventIndex ); event TokenMintLimitUpdated(string symbol, uint256 limit); event OperatorshipTransferred(bytes newOperatorsData); event Upgraded(address indexed implementation); /********************\ |* Public Functions *| \********************/ function sendToken( string calldata destinationChain, string calldata destinationAddress, string calldata symbol, uint256 amount ) external; function callContract( string calldata destinationChain, string calldata contractAddress, bytes calldata payload ) external; function callContractWithToken( string calldata destinationChain, string calldata contractAddress, bytes calldata payload, string calldata symbol, uint256 amount ) external; function isContractCallApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash ) external view returns (bool); function isContractCallAndMintApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external view returns (bool); function validateContractCall( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash ) external returns (bool); function validateContractCallAndMint( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external returns (bool); /***********\ |* Getters *| \***********/ function authModule() external view returns (address); function tokenDeployer() external view returns (address); function tokenMintLimit(string memory symbol) external view returns (uint256); function tokenMintAmount(string memory symbol) external view returns (uint256); function allTokensFrozen() external view returns (bool); function implementation() external view returns (address); function tokenAddresses(string memory symbol) external view returns (address); function tokenFrozen(string memory symbol) external view returns (bool); function isCommandExecuted(bytes32 commandId) external view returns (bool); function adminEpoch() external view returns (uint256); function adminThreshold(uint256 epoch) external view returns (uint256); function admins(uint256 epoch) external view returns (address[] memory); /*******************\ |* Admin Functions *| \*******************/ function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external; function upgrade( address newImplementation, bytes32 newImplementationCodeHash, bytes calldata setupParams ) external; /**********************\ |* External Functions *| \**********************/ function setup(bytes calldata params) external; function execute(bytes calldata input) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/utils/AddressString.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; library StringToAddress { error InvalidAddressString(); function toAddress(string memory addressString) internal pure returns (address) { bytes memory stringBytes = bytes(addressString); uint160 addressNumber = 0; uint8 stringByte; if (stringBytes.length != 42 || stringBytes[0] != '0' || stringBytes[1] != 'x') revert InvalidAddressString(); for (uint256 i = 2; i < 42; ++i) { stringByte = uint8(stringBytes[i]); if ((stringByte >= 97) && (stringByte <= 102)) stringByte -= 87; else if ((stringByte >= 65) && (stringByte <= 70)) stringByte -= 55; else if ((stringByte >= 48) && (stringByte <= 57)) stringByte -= 48; else revert InvalidAddressString(); addressNumber |= uint160(uint256(stringByte) << ((41 - i) << 2)); } return address(addressNumber); } } library AddressToString { function toString(address addr) internal pure returns (string memory) { bytes memory addressBytes = abi.encodePacked(addr); uint256 length = addressBytes.length; bytes memory characters = '0123456789abcdef'; bytes memory stringBytes = new bytes(2 + addressBytes.length * 2); stringBytes[0] = '0'; stringBytes[1] = 'x'; for (uint256 i; i < length; ++i) { stringBytes[2 + i * 2] = characters[uint8(addressBytes[i] >> 4)]; stringBytes[3 + i * 2] = characters[uint8(addressBytes[i] & 0x0f)]; } return string(stringBytes); } }
@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ``` * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20Upgradeable.sol"; import "./extensions/IERC20MetadataUpgradeable.sol"; import "../../utils/ContextUpgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[45] private __gap; }
@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
contracts/IERC20CrossChain.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import { IERC20Upgradeable } from '@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol'; interface IERC20CrossChain is IERC20Upgradeable { function transferRemote( string calldata destinationChain, address destinationAddress, uint256 amount ) external payable; }
@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
contracts/IERC20CrossChain.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import { IERC20Upgradeable } from '@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol'; interface IERC20CrossChain is IERC20Upgradeable { function transferRemote( string calldata destinationChain, address destinationAddress, uint256 amount ) external payable; }
contracts/IERC20CrossChain.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import { IERC20Upgradeable } from '@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol'; interface IERC20CrossChain is IERC20Upgradeable { function transferRemote( string calldata destinationChain, address destinationAddress, uint256 amount ) external payable; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol'; import { IAxelarExecutable } from '../interfaces/IAxelarExecutable.sol'; contract AxelarExecutable is IAxelarExecutable { IAxelarGateway public gateway; // constructor(address gateway_) { // if (gateway_ == address(0)) revert InvalidAddress(); // // gateway = IAxelarGateway(gateway_); // } function AxelarExecutable__init(address gateway_) internal { if (gateway_ == address(0)) revert InvalidAddress(); gateway = IAxelarGateway(gateway_); } function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external { bytes32 payloadHash = keccak256(payload); if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash)) revert NotApprovedByGateway(); _execute(sourceChain, sourceAddress, payload); } function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external { bytes32 payloadHash = keccak256(payload); if ( !gateway.validateContractCallAndMint( commandId, sourceChain, sourceAddress, payloadHash, tokenSymbol, amount ) ) revert NotApprovedByGateway(); _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount); } function _execute( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) internal virtual {} function _executeWithToken( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) internal virtual {} }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from './IAxelarGateway.sol'; interface IAxelarExecutable { error InvalidAddress(); error NotApprovedByGateway(); function gateway() external view returns (IAxelarGateway); function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external; function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // This should be owned by the microservice that is paying for gas. interface IAxelarGasService { error NothingReceived(); error InvalidAddress(); error NotCollector(); error InvalidAmounts(); event GasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, address gasToken, uint256 gasFeeAmount, address refundAddress ); event GasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress); event ExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress ); // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; function addGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function addExpressGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeExpressGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function collectFees( address payable receiver, address[] calldata tokens, uint256[] calldata amounts ) external; function refund( address payable receiver, address token, uint256 amount ) external; function gasCollector() external returns (address); }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IAxelarGateway { /**********\ |* Errors *| \**********/ error NotSelf(); error NotProxy(); error InvalidCodeHash(); error SetupFailed(); error InvalidAuthModule(); error InvalidTokenDeployer(); error InvalidAmount(); error InvalidChainId(); error InvalidCommands(); error TokenDoesNotExist(string symbol); error TokenAlreadyExists(string symbol); error TokenDeployFailed(string symbol); error TokenContractDoesNotExist(address token); error BurnFailed(string symbol); error MintFailed(string symbol); error InvalidSetMintLimitsParams(); error ExceedMintLimit(string symbol); /**********\ |* Events *| \**********/ event TokenSent( address indexed sender, string destinationChain, string destinationAddress, string symbol, uint256 amount ); event ContractCall( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload ); event ContractCallWithToken( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload, string symbol, uint256 amount ); event Executed(bytes32 indexed commandId); event TokenDeployed(string symbol, address tokenAddresses); event ContractCallApproved( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, bytes32 sourceTxHash, uint256 sourceEventIndex ); event ContractCallApprovedWithMint( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, bytes32 sourceTxHash, uint256 sourceEventIndex ); event TokenMintLimitUpdated(string symbol, uint256 limit); event OperatorshipTransferred(bytes newOperatorsData); event Upgraded(address indexed implementation); /********************\ |* Public Functions *| \********************/ function sendToken( string calldata destinationChain, string calldata destinationAddress, string calldata symbol, uint256 amount ) external; function callContract( string calldata destinationChain, string calldata contractAddress, bytes calldata payload ) external; function callContractWithToken( string calldata destinationChain, string calldata contractAddress, bytes calldata payload, string calldata symbol, uint256 amount ) external; function isContractCallApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash ) external view returns (bool); function isContractCallAndMintApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external view returns (bool); function validateContractCall( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash ) external returns (bool); function validateContractCallAndMint( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external returns (bool); /***********\ |* Getters *| \***********/ function authModule() external view returns (address); function tokenDeployer() external view returns (address); function tokenMintLimit(string memory symbol) external view returns (uint256); function tokenMintAmount(string memory symbol) external view returns (uint256); function allTokensFrozen() external view returns (bool); function implementation() external view returns (address); function tokenAddresses(string memory symbol) external view returns (address); function tokenFrozen(string memory symbol) external view returns (bool); function isCommandExecuted(bytes32 commandId) external view returns (bool); function adminEpoch() external view returns (uint256); function adminThreshold(uint256 epoch) external view returns (uint256); function admins(uint256 epoch) external view returns (address[] memory); /*******************\ |* Admin Functions *| \*******************/ function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external; function upgrade( address newImplementation, bytes32 newImplementationCodeHash, bytes calldata setupParams ) external; /**********************\ |* External Functions *| \**********************/ function setup(bytes calldata params) external; function execute(bytes calldata input) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/utils/AddressString.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; library StringToAddress { error InvalidAddressString(); function toAddress(string memory addressString) internal pure returns (address) { bytes memory stringBytes = bytes(addressString); uint160 addressNumber = 0; uint8 stringByte; if (stringBytes.length != 42 || stringBytes[0] != '0' || stringBytes[1] != 'x') revert InvalidAddressString(); for (uint256 i = 2; i < 42; ++i) { stringByte = uint8(stringBytes[i]); if ((stringByte >= 97) && (stringByte <= 102)) stringByte -= 87; else if ((stringByte >= 65) && (stringByte <= 70)) stringByte -= 55; else if ((stringByte >= 48) && (stringByte <= 57)) stringByte -= 48; else revert InvalidAddressString(); addressNumber |= uint160(uint256(stringByte) << ((41 - i) << 2)); } return address(addressNumber); } } library AddressToString { function toString(address addr) internal pure returns (string memory) { bytes memory addressBytes = abi.encodePacked(addr); uint256 length = addressBytes.length; bytes memory characters = '0123456789abcdef'; bytes memory stringBytes = new bytes(2 + addressBytes.length * 2); stringBytes[0] = '0'; stringBytes[1] = 'x'; for (uint256 i; i < length; ++i) { stringBytes[2 + i * 2] = characters[uint8(addressBytes[i] >> 4)]; stringBytes[3 + i * 2] = characters[uint8(addressBytes[i] & 0x0f)]; } return string(stringBytes); } }
@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ``` * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20Upgradeable.sol"; import "./extensions/IERC20MetadataUpgradeable.sol"; import "../../utils/ContextUpgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[45] private __gap; }
@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol'; import { IAxelarExecutable } from '../interfaces/IAxelarExecutable.sol'; contract AxelarExecutable is IAxelarExecutable { IAxelarGateway public gateway; // constructor(address gateway_) { // if (gateway_ == address(0)) revert InvalidAddress(); // // gateway = IAxelarGateway(gateway_); // } function AxelarExecutable__init(address gateway_) internal { if (gateway_ == address(0)) revert InvalidAddress(); gateway = IAxelarGateway(gateway_); } function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external { bytes32 payloadHash = keccak256(payload); if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash)) revert NotApprovedByGateway(); _execute(sourceChain, sourceAddress, payload); } function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external { bytes32 payloadHash = keccak256(payload); if ( !gateway.validateContractCallAndMint( commandId, sourceChain, sourceAddress, payloadHash, tokenSymbol, amount ) ) revert NotApprovedByGateway(); _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount); } function _execute( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) internal virtual {} function _executeWithToken( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) internal virtual {} }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from './IAxelarGateway.sol'; interface IAxelarExecutable { error InvalidAddress(); error NotApprovedByGateway(); function gateway() external view returns (IAxelarGateway); function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external; function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // This should be owned by the microservice that is paying for gas. interface IAxelarGasService { error NothingReceived(); error InvalidAddress(); error NotCollector(); error InvalidAmounts(); event GasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, address gasToken, uint256 gasFeeAmount, address refundAddress ); event GasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress); event ExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress ); // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; function addGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function addExpressGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeExpressGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function collectFees( address payable receiver, address[] calldata tokens, uint256[] calldata amounts ) external; function refund( address payable receiver, address token, uint256 amount ) external; function gasCollector() external returns (address); }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IAxelarGateway { /**********\ |* Errors *| \**********/ error NotSelf(); error NotProxy(); error InvalidCodeHash(); error SetupFailed(); error InvalidAuthModule(); error InvalidTokenDeployer(); error InvalidAmount(); error InvalidChainId(); error InvalidCommands(); error TokenDoesNotExist(string symbol); error TokenAlreadyExists(string symbol); error TokenDeployFailed(string symbol); error TokenContractDoesNotExist(address token); error BurnFailed(string symbol); error MintFailed(string symbol); error InvalidSetMintLimitsParams(); error ExceedMintLimit(string symbol); /**********\ |* Events *| \**********/ event TokenSent( address indexed sender, string destinationChain, string destinationAddress, string symbol, uint256 amount ); event ContractCall( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload ); event ContractCallWithToken( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload, string symbol, uint256 amount ); event Executed(bytes32 indexed commandId); event TokenDeployed(string symbol, address tokenAddresses); event ContractCallApproved( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, bytes32 sourceTxHash, uint256 sourceEventIndex ); event ContractCallApprovedWithMint( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, bytes32 sourceTxHash, uint256 sourceEventIndex ); event TokenMintLimitUpdated(string symbol, uint256 limit); event OperatorshipTransferred(bytes newOperatorsData); event Upgraded(address indexed implementation); /********************\ |* Public Functions *| \********************/ function sendToken( string calldata destinationChain, string calldata destinationAddress, string calldata symbol, uint256 amount ) external; function callContract( string calldata destinationChain, string calldata contractAddress, bytes calldata payload ) external; function callContractWithToken( string calldata destinationChain, string calldata contractAddress, bytes calldata payload, string calldata symbol, uint256 amount ) external; function isContractCallApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash ) external view returns (bool); function isContractCallAndMintApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external view returns (bool); function validateContractCall( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash ) external returns (bool); function validateContractCallAndMint( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external returns (bool); /***********\ |* Getters *| \***********/ function authModule() external view returns (address); function tokenDeployer() external view returns (address); function tokenMintLimit(string memory symbol) external view returns (uint256); function tokenMintAmount(string memory symbol) external view returns (uint256); function allTokensFrozen() external view returns (bool); function implementation() external view returns (address); function tokenAddresses(string memory symbol) external view returns (address); function tokenFrozen(string memory symbol) external view returns (bool); function isCommandExecuted(bytes32 commandId) external view returns (bool); function adminEpoch() external view returns (uint256); function adminThreshold(uint256 epoch) external view returns (uint256); function admins(uint256 epoch) external view returns (address[] memory); /*******************\ |* Admin Functions *| \*******************/ function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external; function upgrade( address newImplementation, bytes32 newImplementationCodeHash, bytes calldata setupParams ) external; /**********************\ |* External Functions *| \**********************/ function setup(bytes calldata params) external; function execute(bytes calldata input) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/utils/AddressString.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; library StringToAddress { error InvalidAddressString(); function toAddress(string memory addressString) internal pure returns (address) { bytes memory stringBytes = bytes(addressString); uint160 addressNumber = 0; uint8 stringByte; if (stringBytes.length != 42 || stringBytes[0] != '0' || stringBytes[1] != 'x') revert InvalidAddressString(); for (uint256 i = 2; i < 42; ++i) { stringByte = uint8(stringBytes[i]); if ((stringByte >= 97) && (stringByte <= 102)) stringByte -= 87; else if ((stringByte >= 65) && (stringByte <= 70)) stringByte -= 55; else if ((stringByte >= 48) && (stringByte <= 57)) stringByte -= 48; else revert InvalidAddressString(); addressNumber |= uint160(uint256(stringByte) << ((41 - i) << 2)); } return address(addressNumber); } } library AddressToString { function toString(address addr) internal pure returns (string memory) { bytes memory addressBytes = abi.encodePacked(addr); uint256 length = addressBytes.length; bytes memory characters = '0123456789abcdef'; bytes memory stringBytes = new bytes(2 + addressBytes.length * 2); stringBytes[0] = '0'; stringBytes[1] = 'x'; for (uint256 i; i < length; ++i) { stringBytes[2 + i * 2] = characters[uint8(addressBytes[i] >> 4)]; stringBytes[3 + i * 2] = characters[uint8(addressBytes[i] & 0x0f)]; } return string(stringBytes); } }
@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ``` * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20Upgradeable.sol"; import "./extensions/IERC20MetadataUpgradeable.sol"; import "../../utils/ContextUpgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[45] private __gap; }
@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol'; import { IAxelarExecutable } from '../interfaces/IAxelarExecutable.sol'; contract AxelarExecutable is IAxelarExecutable { IAxelarGateway public gateway; // constructor(address gateway_) { // if (gateway_ == address(0)) revert InvalidAddress(); // // gateway = IAxelarGateway(gateway_); // } function AxelarExecutable__init(address gateway_) internal { if (gateway_ == address(0)) revert InvalidAddress(); gateway = IAxelarGateway(gateway_); } function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external { bytes32 payloadHash = keccak256(payload); if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash)) revert NotApprovedByGateway(); _execute(sourceChain, sourceAddress, payload); } function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external { bytes32 payloadHash = keccak256(payload); if ( !gateway.validateContractCallAndMint( commandId, sourceChain, sourceAddress, payloadHash, tokenSymbol, amount ) ) revert NotApprovedByGateway(); _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount); } function _execute( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) internal virtual {} function _executeWithToken( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) internal virtual {} }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from './IAxelarGateway.sol'; interface IAxelarExecutable { error InvalidAddress(); error NotApprovedByGateway(); function gateway() external view returns (IAxelarGateway); function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external; function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // This should be owned by the microservice that is paying for gas. interface IAxelarGasService { error NothingReceived(); error InvalidAddress(); error NotCollector(); error InvalidAmounts(); event GasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, address gasToken, uint256 gasFeeAmount, address refundAddress ); event GasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress); event ExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress ); // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; function addGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function addExpressGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeExpressGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function collectFees( address payable receiver, address[] calldata tokens, uint256[] calldata amounts ) external; function refund( address payable receiver, address token, uint256 amount ) external; function gasCollector() external returns (address); }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IAxelarGateway { /**********\ |* Errors *| \**********/ error NotSelf(); error NotProxy(); error InvalidCodeHash(); error SetupFailed(); error InvalidAuthModule(); error InvalidTokenDeployer(); error InvalidAmount(); error InvalidChainId(); error InvalidCommands(); error TokenDoesNotExist(string symbol); error TokenAlreadyExists(string symbol); error TokenDeployFailed(string symbol); error TokenContractDoesNotExist(address token); error BurnFailed(string symbol); error MintFailed(string symbol); error InvalidSetMintLimitsParams(); error ExceedMintLimit(string symbol); /**********\ |* Events *| \**********/ event TokenSent( address indexed sender, string destinationChain, string destinationAddress, string symbol, uint256 amount ); event ContractCall( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload ); event ContractCallWithToken( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload, string symbol, uint256 amount ); event Executed(bytes32 indexed commandId); event TokenDeployed(string symbol, address tokenAddresses); event ContractCallApproved( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, bytes32 sourceTxHash, uint256 sourceEventIndex ); event ContractCallApprovedWithMint( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, bytes32 sourceTxHash, uint256 sourceEventIndex ); event TokenMintLimitUpdated(string symbol, uint256 limit); event OperatorshipTransferred(bytes newOperatorsData); event Upgraded(address indexed implementation); /********************\ |* Public Functions *| \********************/ function sendToken( string calldata destinationChain, string calldata destinationAddress, string calldata symbol, uint256 amount ) external; function callContract( string calldata destinationChain, string calldata contractAddress, bytes calldata payload ) external; function callContractWithToken( string calldata destinationChain, string calldata contractAddress, bytes calldata payload, string calldata symbol, uint256 amount ) external; function isContractCallApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash ) external view returns (bool); function isContractCallAndMintApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external view returns (bool); function validateContractCall( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash ) external returns (bool); function validateContractCallAndMint( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external returns (bool); /***********\ |* Getters *| \***********/ function authModule() external view returns (address); function tokenDeployer() external view returns (address); function tokenMintLimit(string memory symbol) external view returns (uint256); function tokenMintAmount(string memory symbol) external view returns (uint256); function allTokensFrozen() external view returns (bool); function implementation() external view returns (address); function tokenAddresses(string memory symbol) external view returns (address); function tokenFrozen(string memory symbol) external view returns (bool); function isCommandExecuted(bytes32 commandId) external view returns (bool); function adminEpoch() external view returns (uint256); function adminThreshold(uint256 epoch) external view returns (uint256); function admins(uint256 epoch) external view returns (address[] memory); /*******************\ |* Admin Functions *| \*******************/ function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external; function upgrade( address newImplementation, bytes32 newImplementationCodeHash, bytes calldata setupParams ) external; /**********************\ |* External Functions *| \**********************/ function setup(bytes calldata params) external; function execute(bytes calldata input) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/utils/AddressString.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; library StringToAddress { error InvalidAddressString(); function toAddress(string memory addressString) internal pure returns (address) { bytes memory stringBytes = bytes(addressString); uint160 addressNumber = 0; uint8 stringByte; if (stringBytes.length != 42 || stringBytes[0] != '0' || stringBytes[1] != 'x') revert InvalidAddressString(); for (uint256 i = 2; i < 42; ++i) { stringByte = uint8(stringBytes[i]); if ((stringByte >= 97) && (stringByte <= 102)) stringByte -= 87; else if ((stringByte >= 65) && (stringByte <= 70)) stringByte -= 55; else if ((stringByte >= 48) && (stringByte <= 57)) stringByte -= 48; else revert InvalidAddressString(); addressNumber |= uint160(uint256(stringByte) << ((41 - i) << 2)); } return address(addressNumber); } } library AddressToString { function toString(address addr) internal pure returns (string memory) { bytes memory addressBytes = abi.encodePacked(addr); uint256 length = addressBytes.length; bytes memory characters = '0123456789abcdef'; bytes memory stringBytes = new bytes(2 + addressBytes.length * 2); stringBytes[0] = '0'; stringBytes[1] = 'x'; for (uint256 i; i < length; ++i) { stringBytes[2 + i * 2] = characters[uint8(addressBytes[i] >> 4)]; stringBytes[3 + i * 2] = characters[uint8(addressBytes[i] & 0x0f)]; } return string(stringBytes); } }
@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ``` * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20Upgradeable.sol"; import "./extensions/IERC20MetadataUpgradeable.sol"; import "../../utils/ContextUpgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[45] private __gap; }
@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
@axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol'; import { IAxelarExecutable } from '../interfaces/IAxelarExecutable.sol'; contract AxelarExecutable is IAxelarExecutable { IAxelarGateway public gateway; // constructor(address gateway_) { // if (gateway_ == address(0)) revert InvalidAddress(); // // gateway = IAxelarGateway(gateway_); // } function AxelarExecutable__init(address gateway_) internal { if (gateway_ == address(0)) revert InvalidAddress(); gateway = IAxelarGateway(gateway_); } function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external { bytes32 payloadHash = keccak256(payload); if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash)) revert NotApprovedByGateway(); _execute(sourceChain, sourceAddress, payload); } function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external { bytes32 payloadHash = keccak256(payload); if ( !gateway.validateContractCallAndMint( commandId, sourceChain, sourceAddress, payloadHash, tokenSymbol, amount ) ) revert NotApprovedByGateway(); _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount); } function _execute( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) internal virtual {} function _executeWithToken( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) internal virtual {} }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from './IAxelarGateway.sol'; interface IAxelarExecutable { error InvalidAddress(); error NotApprovedByGateway(); function gateway() external view returns (IAxelarGateway); function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external; function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // This should be owned by the microservice that is paying for gas. interface IAxelarGasService { error NothingReceived(); error InvalidAddress(); error NotCollector(); error InvalidAmounts(); event GasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, address gasToken, uint256 gasFeeAmount, address refundAddress ); event GasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress); event ExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress ); // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; function addGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function addExpressGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeExpressGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function collectFees( address payable receiver, address[] calldata tokens, uint256[] calldata amounts ) external; function refund( address payable receiver, address token, uint256 amount ) external; function gasCollector() external returns (address); }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IAxelarGateway { /**********\ |* Errors *| \**********/ error NotSelf(); error NotProxy(); error InvalidCodeHash(); error SetupFailed(); error InvalidAuthModule(); error InvalidTokenDeployer(); error InvalidAmount(); error InvalidChainId(); error InvalidCommands(); error TokenDoesNotExist(string symbol); error TokenAlreadyExists(string symbol); error TokenDeployFailed(string symbol); error TokenContractDoesNotExist(address token); error BurnFailed(string symbol); error MintFailed(string symbol); error InvalidSetMintLimitsParams(); error ExceedMintLimit(string symbol); /**********\ |* Events *| \**********/ event TokenSent( address indexed sender, string destinationChain, string destinationAddress, string symbol, uint256 amount ); event ContractCall( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload ); event ContractCallWithToken( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload, string symbol, uint256 amount ); event Executed(bytes32 indexed commandId); event TokenDeployed(string symbol, address tokenAddresses); event ContractCallApproved( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, bytes32 sourceTxHash, uint256 sourceEventIndex ); event ContractCallApprovedWithMint( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, bytes32 sourceTxHash, uint256 sourceEventIndex ); event TokenMintLimitUpdated(string symbol, uint256 limit); event OperatorshipTransferred(bytes newOperatorsData); event Upgraded(address indexed implementation); /********************\ |* Public Functions *| \********************/ function sendToken( string calldata destinationChain, string calldata destinationAddress, string calldata symbol, uint256 amount ) external; function callContract( string calldata destinationChain, string calldata contractAddress, bytes calldata payload ) external; function callContractWithToken( string calldata destinationChain, string calldata contractAddress, bytes calldata payload, string calldata symbol, uint256 amount ) external; function isContractCallApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash ) external view returns (bool); function isContractCallAndMintApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external view returns (bool); function validateContractCall( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash ) external returns (bool); function validateContractCallAndMint( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external returns (bool); /***********\ |* Getters *| \***********/ function authModule() external view returns (address); function tokenDeployer() external view returns (address); function tokenMintLimit(string memory symbol) external view returns (uint256); function tokenMintAmount(string memory symbol) external view returns (uint256); function allTokensFrozen() external view returns (bool); function implementation() external view returns (address); function tokenAddresses(string memory symbol) external view returns (address); function tokenFrozen(string memory symbol) external view returns (bool); function isCommandExecuted(bytes32 commandId) external view returns (bool); function adminEpoch() external view returns (uint256); function adminThreshold(uint256 epoch) external view returns (uint256); function admins(uint256 epoch) external view returns (address[] memory); /*******************\ |* Admin Functions *| \*******************/ function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external; function upgrade( address newImplementation, bytes32 newImplementationCodeHash, bytes calldata setupParams ) external; /**********************\ |* External Functions *| \**********************/ function setup(bytes calldata params) external; function execute(bytes calldata input) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/utils/AddressString.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; library StringToAddress { error InvalidAddressString(); function toAddress(string memory addressString) internal pure returns (address) { bytes memory stringBytes = bytes(addressString); uint160 addressNumber = 0; uint8 stringByte; if (stringBytes.length != 42 || stringBytes[0] != '0' || stringBytes[1] != 'x') revert InvalidAddressString(); for (uint256 i = 2; i < 42; ++i) { stringByte = uint8(stringBytes[i]); if ((stringByte >= 97) && (stringByte <= 102)) stringByte -= 87; else if ((stringByte >= 65) && (stringByte <= 70)) stringByte -= 55; else if ((stringByte >= 48) && (stringByte <= 57)) stringByte -= 48; else revert InvalidAddressString(); addressNumber |= uint160(uint256(stringByte) << ((41 - i) << 2)); } return address(addressNumber); } } library AddressToString { function toString(address addr) internal pure returns (string memory) { bytes memory addressBytes = abi.encodePacked(addr); uint256 length = addressBytes.length; bytes memory characters = '0123456789abcdef'; bytes memory stringBytes = new bytes(2 + addressBytes.length * 2); stringBytes[0] = '0'; stringBytes[1] = 'x'; for (uint256 i; i < length; ++i) { stringBytes[2 + i * 2] = characters[uint8(addressBytes[i] >> 4)]; stringBytes[3 + i * 2] = characters[uint8(addressBytes[i] & 0x0f)]; } return string(stringBytes); } }
@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ``` * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20Upgradeable.sol"; import "./extensions/IERC20MetadataUpgradeable.sol"; import "../../utils/ContextUpgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[45] private __gap; }
@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
contracts/IERC20CrossChain.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import { IERC20Upgradeable } from '@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol'; interface IERC20CrossChain is IERC20Upgradeable { function transferRemote( string calldata destinationChain, address destinationAddress, uint256 amount ) external payable; }
contracts/IERC20CrossChain.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import { IERC20Upgradeable } from '@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol'; interface IERC20CrossChain is IERC20Upgradeable { function transferRemote( string calldata destinationChain, address destinationAddress, uint256 amount ) external payable; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol'; import { IAxelarExecutable } from '../interfaces/IAxelarExecutable.sol'; contract AxelarExecutable is IAxelarExecutable { IAxelarGateway public gateway; // constructor(address gateway_) { // if (gateway_ == address(0)) revert InvalidAddress(); // // gateway = IAxelarGateway(gateway_); // } function AxelarExecutable__init(address gateway_) internal { if (gateway_ == address(0)) revert InvalidAddress(); gateway = IAxelarGateway(gateway_); } function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external { bytes32 payloadHash = keccak256(payload); if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash)) revert NotApprovedByGateway(); _execute(sourceChain, sourceAddress, payload); } function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external { bytes32 payloadHash = keccak256(payload); if ( !gateway.validateContractCallAndMint( commandId, sourceChain, sourceAddress, payloadHash, tokenSymbol, amount ) ) revert NotApprovedByGateway(); _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount); } function _execute( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) internal virtual {} function _executeWithToken( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) internal virtual {} }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from './IAxelarGateway.sol'; interface IAxelarExecutable { error InvalidAddress(); error NotApprovedByGateway(); function gateway() external view returns (IAxelarGateway); function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external; function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // This should be owned by the microservice that is paying for gas. interface IAxelarGasService { error NothingReceived(); error InvalidAddress(); error NotCollector(); error InvalidAmounts(); event GasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, address gasToken, uint256 gasFeeAmount, address refundAddress ); event GasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress); event ExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress ); // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; function addGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function addExpressGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeExpressGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function collectFees( address payable receiver, address[] calldata tokens, uint256[] calldata amounts ) external; function refund( address payable receiver, address token, uint256 amount ) external; function gasCollector() external returns (address); }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IAxelarGateway { /**********\ |* Errors *| \**********/ error NotSelf(); error NotProxy(); error InvalidCodeHash(); error SetupFailed(); error InvalidAuthModule(); error InvalidTokenDeployer(); error InvalidAmount(); error InvalidChainId(); error InvalidCommands(); error TokenDoesNotExist(string symbol); error TokenAlreadyExists(string symbol); error TokenDeployFailed(string symbol); error TokenContractDoesNotExist(address token); error BurnFailed(string symbol); error MintFailed(string symbol); error InvalidSetMintLimitsParams(); error ExceedMintLimit(string symbol); /**********\ |* Events *| \**********/ event TokenSent( address indexed sender, string destinationChain, string destinationAddress, string symbol, uint256 amount ); event ContractCall( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload ); event ContractCallWithToken( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload, string symbol, uint256 amount ); event Executed(bytes32 indexed commandId); event TokenDeployed(string symbol, address tokenAddresses); event ContractCallApproved( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, bytes32 sourceTxHash, uint256 sourceEventIndex ); event ContractCallApprovedWithMint( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, bytes32 sourceTxHash, uint256 sourceEventIndex ); event TokenMintLimitUpdated(string symbol, uint256 limit); event OperatorshipTransferred(bytes newOperatorsData); event Upgraded(address indexed implementation); /********************\ |* Public Functions *| \********************/ function sendToken( string calldata destinationChain, string calldata destinationAddress, string calldata symbol, uint256 amount ) external; function callContract( string calldata destinationChain, string calldata contractAddress, bytes calldata payload ) external; function callContractWithToken( string calldata destinationChain, string calldata contractAddress, bytes calldata payload, string calldata symbol, uint256 amount ) external; function isContractCallApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash ) external view returns (bool); function isContractCallAndMintApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external view returns (bool); function validateContractCall( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash ) external returns (bool); function validateContractCallAndMint( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external returns (bool); /***********\ |* Getters *| \***********/ function authModule() external view returns (address); function tokenDeployer() external view returns (address); function tokenMintLimit(string memory symbol) external view returns (uint256); function tokenMintAmount(string memory symbol) external view returns (uint256); function allTokensFrozen() external view returns (bool); function implementation() external view returns (address); function tokenAddresses(string memory symbol) external view returns (address); function tokenFrozen(string memory symbol) external view returns (bool); function isCommandExecuted(bytes32 commandId) external view returns (bool); function adminEpoch() external view returns (uint256); function adminThreshold(uint256 epoch) external view returns (uint256); function admins(uint256 epoch) external view returns (address[] memory); /*******************\ |* Admin Functions *| \*******************/ function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external; function upgrade( address newImplementation, bytes32 newImplementationCodeHash, bytes calldata setupParams ) external; /**********************\ |* External Functions *| \**********************/ function setup(bytes calldata params) external; function execute(bytes calldata input) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/utils/AddressString.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; library StringToAddress { error InvalidAddressString(); function toAddress(string memory addressString) internal pure returns (address) { bytes memory stringBytes = bytes(addressString); uint160 addressNumber = 0; uint8 stringByte; if (stringBytes.length != 42 || stringBytes[0] != '0' || stringBytes[1] != 'x') revert InvalidAddressString(); for (uint256 i = 2; i < 42; ++i) { stringByte = uint8(stringBytes[i]); if ((stringByte >= 97) && (stringByte <= 102)) stringByte -= 87; else if ((stringByte >= 65) && (stringByte <= 70)) stringByte -= 55; else if ((stringByte >= 48) && (stringByte <= 57)) stringByte -= 48; else revert InvalidAddressString(); addressNumber |= uint160(uint256(stringByte) << ((41 - i) << 2)); } return address(addressNumber); } } library AddressToString { function toString(address addr) internal pure returns (string memory) { bytes memory addressBytes = abi.encodePacked(addr); uint256 length = addressBytes.length; bytes memory characters = '0123456789abcdef'; bytes memory stringBytes = new bytes(2 + addressBytes.length * 2); stringBytes[0] = '0'; stringBytes[1] = 'x'; for (uint256 i; i < length; ++i) { stringBytes[2 + i * 2] = characters[uint8(addressBytes[i] >> 4)]; stringBytes[3 + i * 2] = characters[uint8(addressBytes[i] & 0x0f)]; } return string(stringBytes); } }
@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ``` * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20Upgradeable.sol"; import "./extensions/IERC20MetadataUpgradeable.sol"; import "../../utils/ContextUpgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[45] private __gap; }
@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
contracts/IERC20CrossChain.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import { IERC20Upgradeable } from '@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol'; interface IERC20CrossChain is IERC20Upgradeable { function transferRemote( string calldata destinationChain, address destinationAddress, uint256 amount ) external payable; }
@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
contracts/IERC20CrossChain.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import { IERC20Upgradeable } from '@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol'; interface IERC20CrossChain is IERC20Upgradeable { function transferRemote( string calldata destinationChain, address destinationAddress, uint256 amount ) external payable; }
contracts/IERC20CrossChain.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import { IERC20Upgradeable } from '@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol'; interface IERC20CrossChain is IERC20Upgradeable { function transferRemote( string calldata destinationChain, address destinationAddress, uint256 amount ) external payable; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol'; import { IAxelarExecutable } from '../interfaces/IAxelarExecutable.sol'; contract AxelarExecutable is IAxelarExecutable { IAxelarGateway public gateway; // constructor(address gateway_) { // if (gateway_ == address(0)) revert InvalidAddress(); // // gateway = IAxelarGateway(gateway_); // } function AxelarExecutable__init(address gateway_) internal { if (gateway_ == address(0)) revert InvalidAddress(); gateway = IAxelarGateway(gateway_); } function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external { bytes32 payloadHash = keccak256(payload); if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash)) revert NotApprovedByGateway(); _execute(sourceChain, sourceAddress, payload); } function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external { bytes32 payloadHash = keccak256(payload); if ( !gateway.validateContractCallAndMint( commandId, sourceChain, sourceAddress, payloadHash, tokenSymbol, amount ) ) revert NotApprovedByGateway(); _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount); } function _execute( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) internal virtual {} function _executeWithToken( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) internal virtual {} }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from './IAxelarGateway.sol'; interface IAxelarExecutable { error InvalidAddress(); error NotApprovedByGateway(); function gateway() external view returns (IAxelarGateway); function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external; function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // This should be owned by the microservice that is paying for gas. interface IAxelarGasService { error NothingReceived(); error InvalidAddress(); error NotCollector(); error InvalidAmounts(); event GasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, address gasToken, uint256 gasFeeAmount, address refundAddress ); event GasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress); event ExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress ); // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; function addGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function addExpressGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeExpressGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function collectFees( address payable receiver, address[] calldata tokens, uint256[] calldata amounts ) external; function refund( address payable receiver, address token, uint256 amount ) external; function gasCollector() external returns (address); }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IAxelarGateway { /**********\ |* Errors *| \**********/ error NotSelf(); error NotProxy(); error InvalidCodeHash(); error SetupFailed(); error InvalidAuthModule(); error InvalidTokenDeployer(); error InvalidAmount(); error InvalidChainId(); error InvalidCommands(); error TokenDoesNotExist(string symbol); error TokenAlreadyExists(string symbol); error TokenDeployFailed(string symbol); error TokenContractDoesNotExist(address token); error BurnFailed(string symbol); error MintFailed(string symbol); error InvalidSetMintLimitsParams(); error ExceedMintLimit(string symbol); /**********\ |* Events *| \**********/ event TokenSent( address indexed sender, string destinationChain, string destinationAddress, string symbol, uint256 amount ); event ContractCall( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload ); event ContractCallWithToken( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload, string symbol, uint256 amount ); event Executed(bytes32 indexed commandId); event TokenDeployed(string symbol, address tokenAddresses); event ContractCallApproved( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, bytes32 sourceTxHash, uint256 sourceEventIndex ); event ContractCallApprovedWithMint( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, bytes32 sourceTxHash, uint256 sourceEventIndex ); event TokenMintLimitUpdated(string symbol, uint256 limit); event OperatorshipTransferred(bytes newOperatorsData); event Upgraded(address indexed implementation); /********************\ |* Public Functions *| \********************/ function sendToken( string calldata destinationChain, string calldata destinationAddress, string calldata symbol, uint256 amount ) external; function callContract( string calldata destinationChain, string calldata contractAddress, bytes calldata payload ) external; function callContractWithToken( string calldata destinationChain, string calldata contractAddress, bytes calldata payload, string calldata symbol, uint256 amount ) external; function isContractCallApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash ) external view returns (bool); function isContractCallAndMintApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external view returns (bool); function validateContractCall( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash ) external returns (bool); function validateContractCallAndMint( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external returns (bool); /***********\ |* Getters *| \***********/ function authModule() external view returns (address); function tokenDeployer() external view returns (address); function tokenMintLimit(string memory symbol) external view returns (uint256); function tokenMintAmount(string memory symbol) external view returns (uint256); function allTokensFrozen() external view returns (bool); function implementation() external view returns (address); function tokenAddresses(string memory symbol) external view returns (address); function tokenFrozen(string memory symbol) external view returns (bool); function isCommandExecuted(bytes32 commandId) external view returns (bool); function adminEpoch() external view returns (uint256); function adminThreshold(uint256 epoch) external view returns (uint256); function admins(uint256 epoch) external view returns (address[] memory); /*******************\ |* Admin Functions *| \*******************/ function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external; function upgrade( address newImplementation, bytes32 newImplementationCodeHash, bytes calldata setupParams ) external; /**********************\ |* External Functions *| \**********************/ function setup(bytes calldata params) external; function execute(bytes calldata input) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/utils/AddressString.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; library StringToAddress { error InvalidAddressString(); function toAddress(string memory addressString) internal pure returns (address) { bytes memory stringBytes = bytes(addressString); uint160 addressNumber = 0; uint8 stringByte; if (stringBytes.length != 42 || stringBytes[0] != '0' || stringBytes[1] != 'x') revert InvalidAddressString(); for (uint256 i = 2; i < 42; ++i) { stringByte = uint8(stringBytes[i]); if ((stringByte >= 97) && (stringByte <= 102)) stringByte -= 87; else if ((stringByte >= 65) && (stringByte <= 70)) stringByte -= 55; else if ((stringByte >= 48) && (stringByte <= 57)) stringByte -= 48; else revert InvalidAddressString(); addressNumber |= uint160(uint256(stringByte) << ((41 - i) << 2)); } return address(addressNumber); } } library AddressToString { function toString(address addr) internal pure returns (string memory) { bytes memory addressBytes = abi.encodePacked(addr); uint256 length = addressBytes.length; bytes memory characters = '0123456789abcdef'; bytes memory stringBytes = new bytes(2 + addressBytes.length * 2); stringBytes[0] = '0'; stringBytes[1] = 'x'; for (uint256 i; i < length; ++i) { stringBytes[2 + i * 2] = characters[uint8(addressBytes[i] >> 4)]; stringBytes[3 + i * 2] = characters[uint8(addressBytes[i] & 0x0f)]; } return string(stringBytes); } }
@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ``` * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20Upgradeable.sol"; import "./extensions/IERC20MetadataUpgradeable.sol"; import "../../utils/ContextUpgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[45] private __gap; }
@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol'; import { IAxelarExecutable } from '../interfaces/IAxelarExecutable.sol'; contract AxelarExecutable is IAxelarExecutable { IAxelarGateway public gateway; // constructor(address gateway_) { // if (gateway_ == address(0)) revert InvalidAddress(); // // gateway = IAxelarGateway(gateway_); // } function AxelarExecutable__init(address gateway_) internal { if (gateway_ == address(0)) revert InvalidAddress(); gateway = IAxelarGateway(gateway_); } function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external { bytes32 payloadHash = keccak256(payload); if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash)) revert NotApprovedByGateway(); _execute(sourceChain, sourceAddress, payload); } function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external { bytes32 payloadHash = keccak256(payload); if ( !gateway.validateContractCallAndMint( commandId, sourceChain, sourceAddress, payloadHash, tokenSymbol, amount ) ) revert NotApprovedByGateway(); _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount); } function _execute( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) internal virtual {} function _executeWithToken( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) internal virtual {} }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from './IAxelarGateway.sol'; interface IAxelarExecutable { error InvalidAddress(); error NotApprovedByGateway(); function gateway() external view returns (IAxelarGateway); function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external; function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // This should be owned by the microservice that is paying for gas. interface IAxelarGasService { error NothingReceived(); error InvalidAddress(); error NotCollector(); error InvalidAmounts(); event GasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, address gasToken, uint256 gasFeeAmount, address refundAddress ); event GasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress); event ExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress ); // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; function addGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function addExpressGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeExpressGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function collectFees( address payable receiver, address[] calldata tokens, uint256[] calldata amounts ) external; function refund( address payable receiver, address token, uint256 amount ) external; function gasCollector() external returns (address); }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IAxelarGateway { /**********\ |* Errors *| \**********/ error NotSelf(); error NotProxy(); error InvalidCodeHash(); error SetupFailed(); error InvalidAuthModule(); error InvalidTokenDeployer(); error InvalidAmount(); error InvalidChainId(); error InvalidCommands(); error TokenDoesNotExist(string symbol); error TokenAlreadyExists(string symbol); error TokenDeployFailed(string symbol); error TokenContractDoesNotExist(address token); error BurnFailed(string symbol); error MintFailed(string symbol); error InvalidSetMintLimitsParams(); error ExceedMintLimit(string symbol); /**********\ |* Events *| \**********/ event TokenSent( address indexed sender, string destinationChain, string destinationAddress, string symbol, uint256 amount ); event ContractCall( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload ); event ContractCallWithToken( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload, string symbol, uint256 amount ); event Executed(bytes32 indexed commandId); event TokenDeployed(string symbol, address tokenAddresses); event ContractCallApproved( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, bytes32 sourceTxHash, uint256 sourceEventIndex ); event ContractCallApprovedWithMint( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, bytes32 sourceTxHash, uint256 sourceEventIndex ); event TokenMintLimitUpdated(string symbol, uint256 limit); event OperatorshipTransferred(bytes newOperatorsData); event Upgraded(address indexed implementation); /********************\ |* Public Functions *| \********************/ function sendToken( string calldata destinationChain, string calldata destinationAddress, string calldata symbol, uint256 amount ) external; function callContract( string calldata destinationChain, string calldata contractAddress, bytes calldata payload ) external; function callContractWithToken( string calldata destinationChain, string calldata contractAddress, bytes calldata payload, string calldata symbol, uint256 amount ) external; function isContractCallApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash ) external view returns (bool); function isContractCallAndMintApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external view returns (bool); function validateContractCall( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash ) external returns (bool); function validateContractCallAndMint( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external returns (bool); /***********\ |* Getters *| \***********/ function authModule() external view returns (address); function tokenDeployer() external view returns (address); function tokenMintLimit(string memory symbol) external view returns (uint256); function tokenMintAmount(string memory symbol) external view returns (uint256); function allTokensFrozen() external view returns (bool); function implementation() external view returns (address); function tokenAddresses(string memory symbol) external view returns (address); function tokenFrozen(string memory symbol) external view returns (bool); function isCommandExecuted(bytes32 commandId) external view returns (bool); function adminEpoch() external view returns (uint256); function adminThreshold(uint256 epoch) external view returns (uint256); function admins(uint256 epoch) external view returns (address[] memory); /*******************\ |* Admin Functions *| \*******************/ function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external; function upgrade( address newImplementation, bytes32 newImplementationCodeHash, bytes calldata setupParams ) external; /**********************\ |* External Functions *| \**********************/ function setup(bytes calldata params) external; function execute(bytes calldata input) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/utils/AddressString.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; library StringToAddress { error InvalidAddressString(); function toAddress(string memory addressString) internal pure returns (address) { bytes memory stringBytes = bytes(addressString); uint160 addressNumber = 0; uint8 stringByte; if (stringBytes.length != 42 || stringBytes[0] != '0' || stringBytes[1] != 'x') revert InvalidAddressString(); for (uint256 i = 2; i < 42; ++i) { stringByte = uint8(stringBytes[i]); if ((stringByte >= 97) && (stringByte <= 102)) stringByte -= 87; else if ((stringByte >= 65) && (stringByte <= 70)) stringByte -= 55; else if ((stringByte >= 48) && (stringByte <= 57)) stringByte -= 48; else revert InvalidAddressString(); addressNumber |= uint160(uint256(stringByte) << ((41 - i) << 2)); } return address(addressNumber); } } library AddressToString { function toString(address addr) internal pure returns (string memory) { bytes memory addressBytes = abi.encodePacked(addr); uint256 length = addressBytes.length; bytes memory characters = '0123456789abcdef'; bytes memory stringBytes = new bytes(2 + addressBytes.length * 2); stringBytes[0] = '0'; stringBytes[1] = 'x'; for (uint256 i; i < length; ++i) { stringBytes[2 + i * 2] = characters[uint8(addressBytes[i] >> 4)]; stringBytes[3 + i * 2] = characters[uint8(addressBytes[i] & 0x0f)]; } return string(stringBytes); } }
@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ``` * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20Upgradeable.sol"; import "./extensions/IERC20MetadataUpgradeable.sol"; import "../../utils/ContextUpgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[45] private __gap; }
@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol'; import { IAxelarExecutable } from '../interfaces/IAxelarExecutable.sol'; contract AxelarExecutable is IAxelarExecutable { IAxelarGateway public gateway; // constructor(address gateway_) { // if (gateway_ == address(0)) revert InvalidAddress(); // // gateway = IAxelarGateway(gateway_); // } function AxelarExecutable__init(address gateway_) internal { if (gateway_ == address(0)) revert InvalidAddress(); gateway = IAxelarGateway(gateway_); } function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external { bytes32 payloadHash = keccak256(payload); if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash)) revert NotApprovedByGateway(); _execute(sourceChain, sourceAddress, payload); } function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external { bytes32 payloadHash = keccak256(payload); if ( !gateway.validateContractCallAndMint( commandId, sourceChain, sourceAddress, payloadHash, tokenSymbol, amount ) ) revert NotApprovedByGateway(); _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount); } function _execute( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) internal virtual {} function _executeWithToken( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) internal virtual {} }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from './IAxelarGateway.sol'; interface IAxelarExecutable { error InvalidAddress(); error NotApprovedByGateway(); function gateway() external view returns (IAxelarGateway); function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external; function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // This should be owned by the microservice that is paying for gas. interface IAxelarGasService { error NothingReceived(); error InvalidAddress(); error NotCollector(); error InvalidAmounts(); event GasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, address gasToken, uint256 gasFeeAmount, address refundAddress ); event GasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress); event ExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress ); // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; function addGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function addExpressGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeExpressGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function collectFees( address payable receiver, address[] calldata tokens, uint256[] calldata amounts ) external; function refund( address payable receiver, address token, uint256 amount ) external; function gasCollector() external returns (address); }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IAxelarGateway { /**********\ |* Errors *| \**********/ error NotSelf(); error NotProxy(); error InvalidCodeHash(); error SetupFailed(); error InvalidAuthModule(); error InvalidTokenDeployer(); error InvalidAmount(); error InvalidChainId(); error InvalidCommands(); error TokenDoesNotExist(string symbol); error TokenAlreadyExists(string symbol); error TokenDeployFailed(string symbol); error TokenContractDoesNotExist(address token); error BurnFailed(string symbol); error MintFailed(string symbol); error InvalidSetMintLimitsParams(); error ExceedMintLimit(string symbol); /**********\ |* Events *| \**********/ event TokenSent( address indexed sender, string destinationChain, string destinationAddress, string symbol, uint256 amount ); event ContractCall( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload ); event ContractCallWithToken( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload, string symbol, uint256 amount ); event Executed(bytes32 indexed commandId); event TokenDeployed(string symbol, address tokenAddresses); event ContractCallApproved( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, bytes32 sourceTxHash, uint256 sourceEventIndex ); event ContractCallApprovedWithMint( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, bytes32 sourceTxHash, uint256 sourceEventIndex ); event TokenMintLimitUpdated(string symbol, uint256 limit); event OperatorshipTransferred(bytes newOperatorsData); event Upgraded(address indexed implementation); /********************\ |* Public Functions *| \********************/ function sendToken( string calldata destinationChain, string calldata destinationAddress, string calldata symbol, uint256 amount ) external; function callContract( string calldata destinationChain, string calldata contractAddress, bytes calldata payload ) external; function callContractWithToken( string calldata destinationChain, string calldata contractAddress, bytes calldata payload, string calldata symbol, uint256 amount ) external; function isContractCallApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash ) external view returns (bool); function isContractCallAndMintApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external view returns (bool); function validateContractCall( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash ) external returns (bool); function validateContractCallAndMint( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external returns (bool); /***********\ |* Getters *| \***********/ function authModule() external view returns (address); function tokenDeployer() external view returns (address); function tokenMintLimit(string memory symbol) external view returns (uint256); function tokenMintAmount(string memory symbol) external view returns (uint256); function allTokensFrozen() external view returns (bool); function implementation() external view returns (address); function tokenAddresses(string memory symbol) external view returns (address); function tokenFrozen(string memory symbol) external view returns (bool); function isCommandExecuted(bytes32 commandId) external view returns (bool); function adminEpoch() external view returns (uint256); function adminThreshold(uint256 epoch) external view returns (uint256); function admins(uint256 epoch) external view returns (address[] memory); /*******************\ |* Admin Functions *| \*******************/ function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external; function upgrade( address newImplementation, bytes32 newImplementationCodeHash, bytes calldata setupParams ) external; /**********************\ |* External Functions *| \**********************/ function setup(bytes calldata params) external; function execute(bytes calldata input) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/utils/AddressString.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; library StringToAddress { error InvalidAddressString(); function toAddress(string memory addressString) internal pure returns (address) { bytes memory stringBytes = bytes(addressString); uint160 addressNumber = 0; uint8 stringByte; if (stringBytes.length != 42 || stringBytes[0] != '0' || stringBytes[1] != 'x') revert InvalidAddressString(); for (uint256 i = 2; i < 42; ++i) { stringByte = uint8(stringBytes[i]); if ((stringByte >= 97) && (stringByte <= 102)) stringByte -= 87; else if ((stringByte >= 65) && (stringByte <= 70)) stringByte -= 55; else if ((stringByte >= 48) && (stringByte <= 57)) stringByte -= 48; else revert InvalidAddressString(); addressNumber |= uint160(uint256(stringByte) << ((41 - i) << 2)); } return address(addressNumber); } } library AddressToString { function toString(address addr) internal pure returns (string memory) { bytes memory addressBytes = abi.encodePacked(addr); uint256 length = addressBytes.length; bytes memory characters = '0123456789abcdef'; bytes memory stringBytes = new bytes(2 + addressBytes.length * 2); stringBytes[0] = '0'; stringBytes[1] = 'x'; for (uint256 i; i < length; ++i) { stringBytes[2 + i * 2] = characters[uint8(addressBytes[i] >> 4)]; stringBytes[3 + i * 2] = characters[uint8(addressBytes[i] & 0x0f)]; } return string(stringBytes); } }
@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ``` * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20Upgradeable.sol"; import "./extensions/IERC20MetadataUpgradeable.sol"; import "../../utils/ContextUpgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[45] private __gap; }
@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
@axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol'; import { IAxelarExecutable } from '../interfaces/IAxelarExecutable.sol'; contract AxelarExecutable is IAxelarExecutable { IAxelarGateway public gateway; // constructor(address gateway_) { // if (gateway_ == address(0)) revert InvalidAddress(); // // gateway = IAxelarGateway(gateway_); // } function AxelarExecutable__init(address gateway_) internal { if (gateway_ == address(0)) revert InvalidAddress(); gateway = IAxelarGateway(gateway_); } function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external { bytes32 payloadHash = keccak256(payload); if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash)) revert NotApprovedByGateway(); _execute(sourceChain, sourceAddress, payload); } function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external { bytes32 payloadHash = keccak256(payload); if ( !gateway.validateContractCallAndMint( commandId, sourceChain, sourceAddress, payloadHash, tokenSymbol, amount ) ) revert NotApprovedByGateway(); _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount); } function _execute( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) internal virtual {} function _executeWithToken( string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) internal virtual {} }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarExecutable.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IAxelarGateway } from './IAxelarGateway.sol'; interface IAxelarExecutable { error InvalidAddress(); error NotApprovedByGateway(); function gateway() external view returns (IAxelarGateway); function execute( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload ) external; function executeWithToken( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes calldata payload, string calldata tokenSymbol, uint256 amount ) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // This should be owned by the microservice that is paying for gas. interface IAxelarGasService { error NothingReceived(); error InvalidAddress(); error NotCollector(); error InvalidAmounts(); event GasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, address gasToken, uint256 gasFeeAmount, address refundAddress ); event GasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCall( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForContractCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasPaidForExpressCallWithToken( address indexed sourceAddress, string destinationChain, string destinationAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, uint256 gasFeeAmount, address refundAddress ); event GasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress); event ExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ); event NativeExpressGasAdded( bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress ); // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCall( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForContractCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; // This is called on the source chain before calling the gateway to execute a remote contract. function payGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; // This is called on the source chain before calling the gateway to execute a remote contract. function payNativeGasForExpressCallWithToken( address sender, string calldata destinationChain, string calldata destinationAddress, bytes calldata payload, string calldata symbol, uint256 amount, address refundAddress ) external payable; function addGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function addExpressGas( bytes32 txHash, uint256 txIndex, address gasToken, uint256 gasFeeAmount, address refundAddress ) external; function addNativeExpressGas( bytes32 txHash, uint256 logIndex, address refundAddress ) external payable; function collectFees( address payable receiver, address[] calldata tokens, uint256[] calldata amounts ) external; function refund( address payable receiver, address token, uint256 amount ) external; function gasCollector() external returns (address); }
@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IAxelarGateway { /**********\ |* Errors *| \**********/ error NotSelf(); error NotProxy(); error InvalidCodeHash(); error SetupFailed(); error InvalidAuthModule(); error InvalidTokenDeployer(); error InvalidAmount(); error InvalidChainId(); error InvalidCommands(); error TokenDoesNotExist(string symbol); error TokenAlreadyExists(string symbol); error TokenDeployFailed(string symbol); error TokenContractDoesNotExist(address token); error BurnFailed(string symbol); error MintFailed(string symbol); error InvalidSetMintLimitsParams(); error ExceedMintLimit(string symbol); /**********\ |* Events *| \**********/ event TokenSent( address indexed sender, string destinationChain, string destinationAddress, string symbol, uint256 amount ); event ContractCall( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload ); event ContractCallWithToken( address indexed sender, string destinationChain, string destinationContractAddress, bytes32 indexed payloadHash, bytes payload, string symbol, uint256 amount ); event Executed(bytes32 indexed commandId); event TokenDeployed(string symbol, address tokenAddresses); event ContractCallApproved( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, bytes32 sourceTxHash, uint256 sourceEventIndex ); event ContractCallApprovedWithMint( bytes32 indexed commandId, string sourceChain, string sourceAddress, address indexed contractAddress, bytes32 indexed payloadHash, string symbol, uint256 amount, bytes32 sourceTxHash, uint256 sourceEventIndex ); event TokenMintLimitUpdated(string symbol, uint256 limit); event OperatorshipTransferred(bytes newOperatorsData); event Upgraded(address indexed implementation); /********************\ |* Public Functions *| \********************/ function sendToken( string calldata destinationChain, string calldata destinationAddress, string calldata symbol, uint256 amount ) external; function callContract( string calldata destinationChain, string calldata contractAddress, bytes calldata payload ) external; function callContractWithToken( string calldata destinationChain, string calldata contractAddress, bytes calldata payload, string calldata symbol, uint256 amount ) external; function isContractCallApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash ) external view returns (bool); function isContractCallAndMintApproved( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, address contractAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external view returns (bool); function validateContractCall( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash ) external returns (bool); function validateContractCallAndMint( bytes32 commandId, string calldata sourceChain, string calldata sourceAddress, bytes32 payloadHash, string calldata symbol, uint256 amount ) external returns (bool); /***********\ |* Getters *| \***********/ function authModule() external view returns (address); function tokenDeployer() external view returns (address); function tokenMintLimit(string memory symbol) external view returns (uint256); function tokenMintAmount(string memory symbol) external view returns (uint256); function allTokensFrozen() external view returns (bool); function implementation() external view returns (address); function tokenAddresses(string memory symbol) external view returns (address); function tokenFrozen(string memory symbol) external view returns (bool); function isCommandExecuted(bytes32 commandId) external view returns (bool); function adminEpoch() external view returns (uint256); function adminThreshold(uint256 epoch) external view returns (uint256); function admins(uint256 epoch) external view returns (address[] memory); /*******************\ |* Admin Functions *| \*******************/ function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external; function upgrade( address newImplementation, bytes32 newImplementationCodeHash, bytes calldata setupParams ) external; /**********************\ |* External Functions *| \**********************/ function setup(bytes calldata params) external; function execute(bytes calldata input) external; }
@axelar-network/axelar-gmp-sdk-solidity/contracts/utils/AddressString.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; library StringToAddress { error InvalidAddressString(); function toAddress(string memory addressString) internal pure returns (address) { bytes memory stringBytes = bytes(addressString); uint160 addressNumber = 0; uint8 stringByte; if (stringBytes.length != 42 || stringBytes[0] != '0' || stringBytes[1] != 'x') revert InvalidAddressString(); for (uint256 i = 2; i < 42; ++i) { stringByte = uint8(stringBytes[i]); if ((stringByte >= 97) && (stringByte <= 102)) stringByte -= 87; else if ((stringByte >= 65) && (stringByte <= 70)) stringByte -= 55; else if ((stringByte >= 48) && (stringByte <= 57)) stringByte -= 48; else revert InvalidAddressString(); addressNumber |= uint160(uint256(stringByte) << ((41 - i) << 2)); } return address(addressNumber); } } library AddressToString { function toString(address addr) internal pure returns (string memory) { bytes memory addressBytes = abi.encodePacked(addr); uint256 length = addressBytes.length; bytes memory characters = '0123456789abcdef'; bytes memory stringBytes = new bytes(2 + addressBytes.length * 2); stringBytes[0] = '0'; stringBytes[1] = 'x'; for (uint256 i; i < length; ++i) { stringBytes[2 + i * 2] = characters[uint8(addressBytes[i] >> 4)]; stringBytes[3 + i * 2] = characters[uint8(addressBytes[i] & 0x0f)]; } return string(stringBytes); } }
@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ``` * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20Upgradeable.sol"; import "./extensions/IERC20MetadataUpgradeable.sol"; import "../../utils/ContextUpgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[45] private __gap; }
@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
contracts/IERC20CrossChain.sol
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import { IERC20Upgradeable } from '@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol'; interface IERC20CrossChain is IERC20Upgradeable { function transferRemote( string calldata destinationChain, address destinationAddress, uint256 amount ) external payable; }
Contract ABI
[{"type":"error","name":"InvalidAddress","inputs":[]},{"type":"error","name":"NotApprovedByGateway","inputs":[]},{"type":"event","name":"Approval","inputs":[{"type":"address","name":"owner","internalType":"address","indexed":true},{"type":"address","name":"spender","internalType":"address","indexed":true},{"type":"uint256","name":"value","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"FalseSender","inputs":[{"type":"string","name":"sourceChain","internalType":"string","indexed":false},{"type":"string","name":"sourceAddress","internalType":"string","indexed":false}],"anonymous":false},{"type":"event","name":"Initialized","inputs":[{"type":"uint8","name":"version","internalType":"uint8","indexed":false}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"Transfer","inputs":[{"type":"address","name":"from","internalType":"address","indexed":true},{"type":"address","name":"to","internalType":"address","indexed":true},{"type":"uint256","name":"value","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"allowance","inputs":[{"type":"address","name":"owner","internalType":"address"},{"type":"address","name":"spender","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"approve","inputs":[{"type":"address","name":"spender","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"balanceOf","inputs":[{"type":"address","name":"account","internalType":"address"}]},{"type":"function","stateMutability":"pure","outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"contractId","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"decimals","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"decreaseAllowance","inputs":[{"type":"address","name":"spender","internalType":"address"},{"type":"uint256","name":"subtractedValue","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"string","name":"","internalType":"string"}],"name":"destinationAddress","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"execute","inputs":[{"type":"bytes32","name":"commandId","internalType":"bytes32"},{"type":"string","name":"sourceChain","internalType":"string"},{"type":"string","name":"sourceAddress","internalType":"string"},{"type":"bytes","name":"payload","internalType":"bytes"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"executeWithToken","inputs":[{"type":"bytes32","name":"commandId","internalType":"bytes32"},{"type":"string","name":"sourceChain","internalType":"string"},{"type":"string","name":"sourceAddress","internalType":"string"},{"type":"bytes","name":"payload","internalType":"bytes"},{"type":"string","name":"tokenSymbol","internalType":"string"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IAxelarGasService"}],"name":"gasService","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IAxelarGateway"}],"name":"gateway","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"giveMe","inputs":[{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"increaseAllowance","inputs":[{"type":"address","name":"spender","internalType":"address"},{"type":"uint256","name":"addedValue","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"initialize","inputs":[{"type":"address","name":"gateway_","internalType":"address"},{"type":"address","name":"gasReceiver_","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"string","name":"","internalType":"string"}],"name":"name","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renounceOwnership","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setDestinationAddress","inputs":[{"type":"string","name":"destinationAddress_","internalType":"string"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"string","name":"","internalType":"string"}],"name":"symbol","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalSupply","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transfer","inputs":[{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transferFrom","inputs":[{"type":"address","name":"from","internalType":"address"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"transferRemote","inputs":[{"type":"uint256","name":"amount","internalType":"uint256"}]}]
Contract Creation Code
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