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- Contract name:
- WitnetDeployer
- Optimization enabled
- true
- Compiler version
- v0.8.25+commit.b61c2a91
- Optimization runs
- 200
- EVM Version
- paris
- Verified at
- 2024-05-23T13:12:16.466052Z
project:/contracts/core/WitnetDeployer.sol
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0 <0.9.0; import "./WitnetProxy.sol"; import "../libs/Create3.sol"; /// @notice WitnetDeployer contract used both as CREATE2 (EIP-1014) factory for Witnet artifacts, /// @notice and CREATE3 (EIP-3171) factory for Witnet proxies. /// @author Guillermo Díaz <guillermo@otherplane.com> contract WitnetDeployer { /// @notice Use given `_initCode` and `_salt` to deploy a contract into a deterministic address. /// @dev The address of deployed address will be determined by both the `_initCode` and the `_salt`, but not the address /// @dev nor the nonce of the caller (i.e. see EIP-1014). /// @param _initCode Creation code, including construction logic and input parameters. /// @param _salt Arbitrary value to modify resulting address. /// @return _deployed Just deployed contract address. function deploy(bytes memory _initCode, bytes32 _salt) external returns (address _deployed) { _deployed = determineAddr(_initCode, _salt); if (_deployed.code.length == 0) { assembly { _deployed := create2(0, add(_initCode, 0x20), mload(_initCode), _salt) } require(_deployed != address(0), "WitnetDeployer: deployment failed"); } } /// @notice Determine counter-factual address of the contract that would be deployed by the given `_initCode` and a `_salt`. /// @param _initCode Creation code, including construction logic and input parameters. /// @param _salt Arbitrary value to modify resulting address. /// @return Deterministic contract address. function determineAddr(bytes memory _initCode, bytes32 _salt) public view returns (address) { return address( uint160(uint(keccak256( abi.encodePacked( bytes1(0xff), address(this), _salt, keccak256(_initCode) ) ))) ); } function determineProxyAddr(bytes32 _salt) public view returns (address) { return Create3.determineAddr(_salt); } function proxify(bytes32 _proxySalt, address _firstImplementation, bytes memory _initData) external returns (WitnetProxy) { address _proxyAddr = determineProxyAddr(_proxySalt); if (_proxyAddr.code.length == 0) { // deploy the WitnetProxy Create3.deploy(_proxySalt, type(WitnetProxy).creationCode); // settle first implementation address, WitnetProxy(payable(_proxyAddr)).upgradeTo( _firstImplementation, // and initialize it, providing abi.encode( // the owner (i.e. the caller of this function) msg.sender, // and some (optional) initialization data _initData ) ); return WitnetProxy(payable(_proxyAddr)); } else { revert("WitnetDeployer: already proxified"); } } }
/Upgradeable.sol
// SPDX-License-Identifier: MIT /* solhint-disable var-name-mixedcase */ pragma solidity >=0.6.0 <0.9.0; import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; import "./Initializable.sol"; import "./Proxiable.sol"; abstract contract Upgradeable is Initializable, Proxiable { address internal immutable _BASE; bytes32 internal immutable _CODEHASH; bool internal immutable _UPGRADABLE; modifier onlyDelegateCalls virtual { require( address(this) != _BASE, "Upgradeable: not a delegate call" ); _; } /// Emitted every time the contract gets upgraded. /// @param from The address who ordered the upgrading. Namely, the WRB operator in "trustable" implementations. /// @param baseAddr The address of the new implementation contract. /// @param baseCodehash The EVM-codehash of the new implementation contract. /// @param versionTag Ascii-encoded version literal with which the implementation deployer decided to tag it. event Upgraded( address indexed from, address indexed baseAddr, bytes32 indexed baseCodehash, string versionTag ); constructor (bool _isUpgradable) { address _base = address(this); _BASE = _base; _UPGRADABLE = _isUpgradable; } /// @dev Retrieves base contract. Differs from address(this) when called via delegate-proxy pattern. function base() public view returns (address) { return _BASE; } /// @dev Retrieves the immutable codehash of this contract, even if invoked as delegatecall. function codehash() public view returns (bytes32 _codehash) { address _base = _BASE; assembly { _codehash := extcodehash(_base) } } /// @dev Determines whether the logic of this contract is potentially upgradable. function isUpgradable() public view returns (bool) { return _UPGRADABLE; } /// @dev Tells whether provided address could eventually upgrade the contract. function isUpgradableFrom(address from) virtual external view returns (bool); /// @notice Re-initialize contract's storage context upon a new upgrade from a proxy. /// @dev Must fail when trying to upgrade to same logic contract more than once. function initialize(bytes memory) virtual external; /// @dev Retrieves human-redable named version of current implementation. function version() virtual public view returns (string memory); }
/Proxiable.sol
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.9.0; abstract contract Proxiable { /// @dev Complying with EIP-1822: Universal Upgradeable Proxy Standard (UUPS) /// @dev See https://eips.ethereum.org/EIPS/eip-1822. function proxiableUUID() virtual external view returns (bytes32); struct ProxiableSlot { address implementation; address proxy; bytes32 codehash; } function __implementation() internal view returns (address) { return __proxiable().implementation; } function __proxy() internal view returns (address) { return __proxiable().proxy; } function __proxiable() internal pure returns (ProxiableSlot storage proxiable) { assembly { // bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1) proxiable.slot := 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc } } }
/Initializable.sol
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0 <0.9.0; import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
/Create3.sol
// SPDX-License-Identifier: AGPL-3.0-only pragma solidity ^0.8.0; /// @notice Deploy to deterministic addresses without an initcode factor. /// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/CREATE3.sol) /// @author 0xSequence (https://github.com/0xSequence/create3/blob/master/contracts/Create3.sol) library Create3 { //--------------------------------------------------------------------------------// // Opcode | Opcode + Arguments | Description | Stack View // //--------------------------------------------------------------------------------// // 0x36 | 0x36 | CALLDATASIZE | size // // 0x3d | 0x3d | RETURNDATASIZE | 0 size // // 0x3d | 0x3d | RETURNDATASIZE | 0 0 size // // 0x37 | 0x37 | CALLDATACOPY | // // 0x36 | 0x36 | CALLDATASIZE | size // // 0x3d | 0x3d | RETURNDATASIZE | 0 size // // 0x34 | 0x34 | CALLVALUE | value 0 size // // 0xf0 | 0xf0 | CREATE | newContract // //--------------------------------------------------------------------------------// // Opcode | Opcode + Arguments | Description | Stack View // //--------------------------------------------------------------------------------// // 0x67 | 0x67XXXXXXXXXXXXXXXX | PUSH8 bytecode | bytecode // // 0x3d | 0x3d | RETURNDATASIZE | 0 bytecode // // 0x52 | 0x52 | MSTORE | // // 0x60 | 0x6008 | PUSH1 08 | 8 // // 0x60 | 0x6018 | PUSH1 18 | 24 8 // // 0xf3 | 0xf3 | RETURN | // //--------------------------------------------------------------------------------// bytes internal constant CREATE3_FACTORY_BYTECODE = hex"67_36_3d_3d_37_36_3d_34_f0_3d_52_60_08_60_18_f3"; bytes32 internal constant CREATE3_FACTORY_CODEHASH = keccak256(CREATE3_FACTORY_BYTECODE); /// @notice Creates a new contract with given `_creationCode` and `_salt` /// @param _salt Salt of the contract creation, resulting address will be derivated from this value only /// @param _creationCode Creation code (constructor) of the contract to be deployed, this value doesn't affect the resulting address /// @return addr of the deployed contract, reverts on error function deploy(bytes32 _salt, bytes memory _creationCode) internal returns (address) { return deploy(_salt, _creationCode, 0); } /// @notice Creates a new contract with given `_creationCode`, `_salt` and `_value`. /// @param _salt Salt of the contract creation, resulting address will be derivated from this value only /// @param _creationCode Creation code (constructor) of the contract to be deployed, this value doesn't affect the resulting address /// @param _value In WEI of ETH to be forwarded to child contract /// @return _deployed The address of the deployed contract. function deploy(bytes32 _salt, bytes memory _creationCode, uint256 _value) internal returns (address _deployed) { // Get target final address _deployed = determineAddr(_salt); if (_deployed.code.length != 0) revert("Create3: target already exists"); // Create factory address _factory; bytes memory _factoryBytecode = CREATE3_FACTORY_BYTECODE; /// @solidity memory-safe-assembly assembly { // Deploy a factory contract with our pre-made bytecode via CREATE2. // We start 32 bytes into the code to avoid copying the byte length. _factory := create2(0, add(_factoryBytecode, 32), mload(_factoryBytecode), _salt) } require(_factory != address(0), "Create3: error creating factory"); // Use factory to deploy target (bool _success, ) = _factory.call{value: _value}(_creationCode); require(_success && _deployed.code.length != 0, "Create3: error creating target"); } /// @notice Computes the resulting address of a contract deployed using address(this) and the given `_salt` /// @param _salt Salt of the contract creation, resulting address will be derivated from this value only /// @return addr of the deployed contract, reverts on error /// @dev The address creation formula is: keccak256(rlp([keccak256(0xff ++ address(this) ++ _salt ++ keccak256(childBytecode))[12:], 0x01])) function determineAddr(bytes32 _salt) internal view returns (address) { address _factory = address( uint160( uint256( keccak256( abi.encodePacked( hex'ff', address(this), _salt, CREATE3_FACTORY_CODEHASH ) ) ) ) ); return address( uint160( uint256( keccak256( abi.encodePacked( // 0xd6 = 0xc0 (short RLP prefix) + 0x16 (length of: 0x94 ++ _factory ++ 0x01) // 0x94 = 0x80 + 0x14 (0x14 = the length of an address, 20 bytes, in hex) hex"d6_94", _factory, // _factory's nonce on which the target is created: 0x1 hex"01" ) ) ) ) ); } }
/WitnetProxy.sol
// SPDX-License-Identifier: MIT pragma solidity >=0.7.0 <0.9.0; pragma experimental ABIEncoderV2; import "../patterns/Upgradeable.sol"; /// @title WitnetProxy: upgradable delegate-proxy contract. /// @author Guillermo Díaz <guillermo@otherplane.com> contract WitnetProxy { /// Event emitted every time the implementation gets updated. event Upgraded(address indexed implementation); /// Constructor with no params as to ease eventual support of Singleton pattern (i.e. ERC-2470). constructor () {} receive() virtual external payable {} /// Payable fallback accepts delegating calls to payable functions. fallback() external payable { /* solhint-disable no-complex-fallback */ address _implementation = implementation(); assembly { /* solhint-disable avoid-low-level-calls */ // Gas optimized delegate call to 'implementation' contract. // Note: `msg.data`, `msg.sender` and `msg.value` will be passed over // to actual implementation of `msg.sig` within `implementation` contract. let ptr := mload(0x40) calldatacopy(ptr, 0, calldatasize()) let result := delegatecall(gas(), _implementation, ptr, calldatasize(), 0, 0) let size := returndatasize() returndatacopy(ptr, 0, size) switch result case 0 { // pass back revert message: revert(ptr, size) } default { // pass back same data as returned by 'implementation' contract: return(ptr, size) } } } /// Returns proxy's current implementation address. function implementation() public view returns (address) { return __proxySlot().implementation; } /// Upgrades the `implementation` address. /// @param _newImplementation New implementation address. /// @param _initData Raw data with which new implementation will be initialized. /// @return Returns whether new implementation would be further upgradable, or not. function upgradeTo(address _newImplementation, bytes memory _initData) public returns (bool) { // New implementation cannot be null: require(_newImplementation != address(0), "WitnetProxy: null implementation"); address _oldImplementation = implementation(); if (_oldImplementation != address(0)) { // New implementation address must differ from current one: require(_newImplementation != _oldImplementation, "WitnetProxy: nothing to upgrade"); // Assert whether current implementation is intrinsically upgradable: try Upgradeable(_oldImplementation).isUpgradable() returns (bool _isUpgradable) { require(_isUpgradable, "WitnetProxy: not upgradable"); } catch { revert("WitnetProxy: unable to check upgradability"); } // Assert whether current implementation allows `msg.sender` to upgrade the proxy: (bool _wasCalled, bytes memory _result) = _oldImplementation.delegatecall( abi.encodeWithSignature( "isUpgradableFrom(address)", msg.sender ) ); require(_wasCalled, "WitnetProxy: uncompliant implementation"); require(abi.decode(_result, (bool)), "WitnetProxy: not authorized"); require( Upgradeable(_oldImplementation).proxiableUUID() == Upgradeable(_newImplementation).proxiableUUID(), "WitnetProxy: proxiableUUIDs mismatch" ); } // Initialize new implementation within proxy-context storage: (bool _wasInitialized, bytes memory _returnData) = _newImplementation.delegatecall( abi.encodeWithSignature( "initialize(bytes)", _initData ) ); if (!_wasInitialized) { if (_returnData.length < 68) { revert("WitnetProxy: initialization failed"); } else { assembly { _returnData := add(_returnData, 0x04) } revert(abi.decode(_returnData, (string))); } } // If all checks and initialization pass, update implementation address: __proxySlot().implementation = _newImplementation; emit Upgraded(_newImplementation); // Asserts new implementation complies w/ minimal implementation of Upgradeable interface: try Upgradeable(_newImplementation).isUpgradable() returns (bool _isUpgradable) { return _isUpgradable; } catch { revert ("WitnetProxy: uncompliant implementation"); } } /// @dev Complying with EIP-1967, retrieves storage struct containing proxy's current implementation address. function __proxySlot() private pure returns (Proxiable.ProxiableSlot storage _slot) { assembly { // bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1) _slot.slot := 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc } } }
/utils/Initializable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.20; /** * @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] * ```solidity * 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 Storage of the initializable contract. * * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions * when using with upgradeable contracts. * * @custom:storage-location erc7201:openzeppelin.storage.Initializable */ struct InitializableStorage { /** * @dev Indicates that the contract has been initialized. */ uint64 _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool _initializing; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00; /** * @dev The contract is already initialized. */ error InvalidInitialization(); /** * @dev The contract is not initializing. */ error NotInitializing(); /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint64 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 in the context of a constructor an `initializer` may be invoked any * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in * production. * * Emits an {Initialized} event. */ modifier initializer() { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); // Cache values to avoid duplicated sloads bool isTopLevelCall = !$._initializing; uint64 initialized = $._initialized; // Allowed calls: // - initialSetup: the contract is not in the initializing state and no previous version was // initialized // - construction: the contract is initialized at version 1 (no reininitialization) and the // current contract is just being deployed bool initialSetup = initialized == 0 && isTopLevelCall; bool construction = initialized == 1 && address(this).code.length == 0; if (!initialSetup && !construction) { revert InvalidInitialization(); } $._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 2**64 - 1 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint64 version) { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); if ($._initializing || $._initialized >= version) { revert InvalidInitialization(); } $._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() { _checkInitializing(); _; } /** * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}. */ function _checkInitializing() internal view virtual { if (!_isInitializing()) { revert NotInitializing(); } } /** * @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 { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); if ($._initializing) { revert InvalidInitialization(); } if ($._initialized != type(uint64).max) { $._initialized = type(uint64).max; emit Initialized(type(uint64).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint64) { return _getInitializableStorage()._initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _getInitializableStorage()._initializing; } /** * @dev Returns a pointer to the storage namespace. */ // solhint-disable-next-line var-name-mixedcase function _getInitializableStorage() private pure returns (InitializableStorage storage $) { assembly { $.slot := INITIALIZABLE_STORAGE } } }
/introspection/IERC165.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
/introspection/ERC165.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/ERC165.sol) pragma solidity ^0.8.20; import {IERC165} from "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
Compiler Settings
{"remappings":[],"optimizer":{"runs":200,"enabled":true},"metadata":{"bytecodeHash":"ipfs"},"libraries":{},"evmVersion":"paris","compilationTarget":{"project:/contracts/core/WitnetDeployer.sol":"WitnetDeployer"}}
Contract ABI
[{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"address","name":"_deployed","internalType":"address"}],"name":"deploy","inputs":[{"type":"bytes","name":"_initCode","internalType":"bytes"},{"type":"bytes32","name":"_salt","internalType":"bytes32"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"determineAddr","inputs":[{"type":"bytes","name":"_initCode","internalType":"bytes"},{"type":"bytes32","name":"_salt","internalType":"bytes32"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"determineProxyAddr","inputs":[{"type":"bytes32","name":"_salt","internalType":"bytes32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"address","name":"","internalType":"contract WitnetProxy"}],"name":"proxify","inputs":[{"type":"bytes32","name":"_proxySalt","internalType":"bytes32"},{"type":"address","name":"_firstImplementation","internalType":"address"},{"type":"bytes","name":"_initData","internalType":"bytes"}]}]
Contract Creation Code
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