Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- FarmPriceUpdater
- Optimization enabled
- true
- Compiler version
- v0.8.11+commit.d7f03943
- Optimization runs
- 200
- EVM Version
- default
- Verified at
- 2022-08-22T06:52:08.464795Z
Constructor Arguments
000000000000000000000000f15bf479a5711f9411595c6289a9e7c36f24ad2f0000000000000000000000009db69cc8db5b3bf22127734c609add56b6c77ae7
Arg [0] (address) : 0xf15bf479a5711f9411595c6289a9e7c36f24ad2f
Arg [1] (address) : 0x9db69cc8db5b3bf22127734c609add56b6c77ae7
Contract source code
// File contracts/interfaces/IArtStudio.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;
interface IArtStudio {
struct TokenInfo {
address rewarder; // Address of rewarder for token
address strategy; // Address of strategy for token
uint256 lastRewardTime; // Last time that KANVAS distribution occurred for this token
uint256 lastCumulativeReward; // Value of cumulativeAvgSkanvasPerWeightedDollar at last update
uint256 storedPrice; // Latest value of token
uint256 accSKANVASPerShare; // Accumulated KANVAS per share, times ACC_KANVAS_PRECISION.
uint256 totalShares; //total number of shares for the token
uint256 totalTokens; //total number of tokens deposited
uint128 multiplier; // multiplier for this token
uint16 withdrawFeeBP; // Withdrawal fee in basis points
}
function KANVAS() external view returns (address);
function strategyPool() external view returns (address);
function performanceFeeAddress() external view returns (address);
function updatePrice(address token, uint256 newPrice) external;
function updatePrices(address[] calldata tokens, uint256[] calldata newPrices) external;
function tokenList() external view returns (address[] memory);
function tokenParameters(address tokenAddress) external view returns (TokenInfo memory);
function deposit(address token, uint256 amount, address to) external;
function harvest(address token, address to) external;
function withdraw(address token, uint256 amountShares, address to) external;
}
// File contracts/interfaces/IUniswapV2TWAP.sol
pragma solidity >=0.5.0;
interface IUniswapV2TWAP {
function consult(address tokenA, address tokenB, address tokenIn, uint256 amountIn) external view returns (uint256 amountOut);
function consultWithUpdate(address tokenA, address tokenB, address tokenIn, uint256 amountIn) external returns (uint256 amountOut);
}
// File @uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol@v1.0.0
pragma solidity >=0.5.0;
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// File @openzeppelin/contracts/token/ERC20/IERC20.sol@v4.3.3
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @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 `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, 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 `sender` to `recipient` 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 sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @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);
}
// File @openzeppelin/contracts/utils/Context.sol@v4.3.3
pragma solidity ^0.8.0;
/**
* @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 Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File @openzeppelin/contracts/access/Ownable.sol@v4.3.3
pragma solidity ^0.8.0;
/**
* @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 Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File contracts/FarmPriceUpdater.sol
//based on: https://github.com/Uniswap/uniswap-v2-periphery/tree/master/contracts/examples
pragma solidity ^0.8.6;
contract FarmPriceUpdater is Ownable {
address constant WKAVA = 0xc86c7C0eFbd6A49B35E8714C5f59D99De09A225b;
//whitelist of addresses that can call this contract
mapping(address => bool) public whitelist;
//tracks whether a token is an LP or not
mapping(address => bool) public lpTokens;
//tracks whether a token is a staked token like xSUSHI or not
mapping(address => bool) public stakedTokens;
//underlying tokens of staked tokens
mapping(address => address) public underlyingTokenOfStakedTokens;
//address of oracle to consult
address public oracle;
//address of ArtStudio
address public immutable artStudio;
event OracleSet();
modifier onlyWhitelist() {
require(whitelist[msg.sender], "only callable by whitelisted addresses");
_;
}
constructor(address _artStudio, address _oracle) {
artStudio = _artStudio;
setOracle(_oracle);
whitelist[msg.sender] = true;
}
//VIEW FUNCTIONS
function getTokenPriceView(address token) public view returns (uint256) {
//NOTE: return value is SCALED UP by 1e18, as this is the input amount in consulting the oracle
if (token != WKAVA) {
return IUniswapV2TWAP(oracle).consult(token, WKAVA, token, 1e18);
} else {
return 1e18;
}
}
function getPriceOfLPView(address lpToken) public view returns (uint256) {
address token0 = IUniswapV2Pair(lpToken).token0();
address token1 = IUniswapV2Pair(lpToken).token1();
uint256 priceToken0 = getTokenPriceView(token0);
uint256 priceToken1 = getTokenPriceView(token1);
(uint256 balanceToken0, uint256 balanceToken1, ) = IUniswapV2Pair(lpToken).getReserves();
uint256 lpTVL = (priceToken0 * balanceToken0) + (priceToken1 * balanceToken1);
return lpTVL / IUniswapV2Pair(lpToken).totalSupply();
}
function getPriceOfStakedTokenView(address stakedToken) public view returns (uint256) {
address underlyingToken = underlyingTokenOfStakedTokens[stakedToken];
uint256 underlyingTokenBalance = IERC20(underlyingToken).balanceOf(stakedToken);
uint256 totalSupplyOfStakedToken = IERC20(stakedToken).totalSupply();
if (totalSupplyOfStakedToken != 0) {
uint256 underlyingTokenPrice = getTokenPriceView(underlyingToken);
return (underlyingTokenPrice * underlyingTokenBalance) / totalSupplyOfStakedToken;
} else {
return 0;
}
}
//PUBLIC WRITE FUNCTIONS
function getTokenPrice(address token) public returns (uint256) {
//NOTE: return value is SCALED UP by 1e18, as this is the input amount in consulting the oracle
if (token != WKAVA) {
return IUniswapV2TWAP(oracle).consultWithUpdate(token, WKAVA, token, 1e18);
} else {
return 1e18;
}
}
function getPriceOfLP(address lpToken) public returns (uint256) {
address token0 = IUniswapV2Pair(lpToken).token0();
address token1 = IUniswapV2Pair(lpToken).token1();
uint256 priceToken0 = getTokenPrice(token0);
uint256 priceToken1 = getTokenPrice(token1);
(uint256 balanceToken0, uint256 balanceToken1, ) = IUniswapV2Pair(lpToken).getReserves();
uint256 lpTVL = (priceToken0 * balanceToken0) + (priceToken1 * balanceToken1);
return lpTVL / IUniswapV2Pair(lpToken).totalSupply();
}
function getPriceOfStakedToken(address stakedToken) public returns (uint256) {
address underlyingToken = underlyingTokenOfStakedTokens[stakedToken];
uint256 underlyingTokenBalance = IERC20(underlyingToken).balanceOf(stakedToken);
uint256 totalSupplyOfStakedToken = IERC20(stakedToken).totalSupply();
if (totalSupplyOfStakedToken != 0) {
uint256 underlyingTokenPrice = getTokenPrice(underlyingToken);
return (underlyingTokenPrice * underlyingTokenBalance) / totalSupplyOfStakedToken;
} else {
return 0;
}
}
//OWNER-ONLY FUNCTIONS
function setOracle(address _oracle) public onlyOwner {
oracle = _oracle;
}
function modifyWhitelist(address[] calldata addresses, bool[] calldata statuses) external onlyOwner {
require(addresses.length == statuses.length, "input length mismatch");
for (uint256 i = 0; i < addresses.length; i++) {
whitelist[addresses[i]] = statuses[i];
}
}
function addLPTokens(address[] calldata tokens) external onlyOwner {
for (uint256 i = 0; i < tokens.length; i++) {
require(IUniswapV2Pair(tokens[i]).factory() != address(0), "not an LP token");
lpTokens[tokens[i]] = true;
}
}
function removeLPTokens(address[] calldata tokens) external onlyOwner {
for (uint256 i = 0; i < tokens.length; i++) {
lpTokens[tokens[i]] = false;
}
}
function addStakedToken(address _stakedToken, address _underlyingToken) external onlyOwner {
stakedTokens[_stakedToken] = true;
underlyingTokenOfStakedTokens[_stakedToken] = _underlyingToken;
}
function removeStakedToken(address _stakedToken) external onlyOwner {
stakedTokens[_stakedToken] = false;
underlyingTokenOfStakedTokens[_stakedToken] = address(0);
}
//WHITELIST-ONLY FUNCTIONS
function setPrice(address token) public onlyWhitelist {
uint256 tokenPrice;
if(lpTokens[token]) {
tokenPrice = getPriceOfLP(token);
} else if(stakedTokens[token]) {
tokenPrice = getPriceOfStakedToken(token);
} else {
tokenPrice = getTokenPrice(token);
}
IArtStudio(artStudio).updatePrice(token, tokenPrice);
}
function setPrices(address[] memory tokens) public onlyWhitelist {
uint256[] memory tokenPrices = new uint256[](tokens.length);
for (uint256 i = 0; i < tokens.length; i++) {
if(lpTokens[tokens[i]]) {
tokenPrices[i] = getPriceOfLP(tokens[i]);
} else if (stakedTokens[tokens[i]]) {
tokenPrices[i] = getPriceOfStakedToken(tokens[i]);
} else {
tokenPrices[i] = getTokenPrice(tokens[i]);
}
}
IArtStudio(artStudio).updatePrices(tokens, tokenPrices);
}
function setAllPrices() external onlyWhitelist {
address[] memory tokens = IArtStudio(artStudio).tokenList();
setPrices(tokens);
}
}
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_artStudio","internalType":"address"},{"type":"address","name":"_oracle","internalType":"address"}]},{"type":"event","name":"OracleSet","inputs":[],"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":"function","stateMutability":"nonpayable","outputs":[],"name":"addLPTokens","inputs":[{"type":"address[]","name":"tokens","internalType":"address[]"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"addStakedToken","inputs":[{"type":"address","name":"_stakedToken","internalType":"address"},{"type":"address","name":"_underlyingToken","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"artStudio","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getPriceOfLP","inputs":[{"type":"address","name":"lpToken","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getPriceOfLPView","inputs":[{"type":"address","name":"lpToken","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getPriceOfStakedToken","inputs":[{"type":"address","name":"stakedToken","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getPriceOfStakedTokenView","inputs":[{"type":"address","name":"stakedToken","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getTokenPrice","inputs":[{"type":"address","name":"token","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getTokenPriceView","inputs":[{"type":"address","name":"token","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"lpTokens","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"modifyWhitelist","inputs":[{"type":"address[]","name":"addresses","internalType":"address[]"},{"type":"bool[]","name":"statuses","internalType":"bool[]"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"oracle","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"removeLPTokens","inputs":[{"type":"address[]","name":"tokens","internalType":"address[]"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"removeStakedToken","inputs":[{"type":"address","name":"_stakedToken","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renounceOwnership","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setAllPrices","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setOracle","inputs":[{"type":"address","name":"_oracle","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setPrice","inputs":[{"type":"address","name":"token","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setPrices","inputs":[{"type":"address[]","name":"tokens","internalType":"address[]"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"stakedTokens","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"underlyingTokenOfStakedTokens","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"whitelist","inputs":[{"type":"address","name":"","internalType":"address"}]}]
Contract Creation Code
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