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Contract Name:
Silo
Compiler Version
v0.8.9+commit.e5eed63a
Optimization Enabled:
Yes with 777 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.9; import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import { Address } from "@openzeppelin/contracts/utils/Address.sol"; import { IUniswapV2Router } from "./IUniswapV2Router.sol"; import { IUniswapV2Factory } from "./IUniswapV2Factory.sol"; import { IUniswapV2Pair } from "./IUniswapV2Pair.sol"; import { IWrappedToken } from "./IWrappedToken.sol"; uint256 constant N = 9; contract Silo { using SafeERC20 for IERC20; constructor(address[N] memory _rewardTokens) { for (uint256 _i = 0; _i < N; _i++) { IERC20(_rewardTokens[_i]).safeApprove(msg.sender, type(uint256).max); } } } library LibSilo { function createSilo(address[N] memory _rewardTokens) public returns (address _silo) { return address(new Silo(_rewardTokens)); } } contract RebasingReflectionToken is Ownable, ERC20 { using Address for address; using Address for address payable; using SafeERC20 for IERC20; struct AccountInfo { bool exists; // existence flag bool excludeFromRewards; // whether or not receive rewards uint256 activeBalance; // 0 or user's balance uint256[N] rewardDebt; // base for reward distribution uint256[N] unclaimedReward; // reward balance available for claim uint256[N] minimumRewardBalanceToClaim; // minimum unclaimed balance to auto claim } address constant FURNACE = 0x000000000000000000000000000000000000dEaD; address constant INTERNAL_ADDRESS = address(1); // used internally to record pending rebase balances uint256 constant BUY_FEE = 6e16; // 6% uint256 constant SELL_FEE = 9e16; // 9% uint256 constant DEFAULT_LAUNCH_TIME = 1740542400; // Oct 7th 2PM UTC address public burnToken = 0x3Ad2234eBFED9dEEfab94B9719aEbc07f8510D47; // Daddy bool private bypass_ = false; // internal flag to bypass all token logic bool private inswap_ = false; // internal flag to bypass additional token transfer logic address public router; // router V2 address[N] public pairs; // n pairs liquidity pool adddresses address[][N] public paths; // routes from WMM to reward tokens uint256 public launchTime = DEFAULT_LAUNCH_TIME; // timestamp when the trading starts uint256 public totalActiveSupply = 0; // sum of active balances for all 7WMM holders address[N] public rewardTokens; // n reward tokens uint256[N] public buybackPercents; // buyback percentage of each token address public wrappedToken; // WETH uint256[N] public rewardBalance = [0, 0, 0, 0, 0, 0, 0, 0, 0]; // 8 reward balance uint256[N] public accRewardPerShare = [0, 0, 0, 0, 0, 0, 0, 0, 0]; // accumulated reward per share (double precision) uint256 public minimumFeeBalanceToBuyback = 20000; // need to be more than just dust address public silo; // holds reward balances address[] public accountIndex; // list of all accounts that ever received WMM mapping(address => AccountInfo) public accountInfo; // account attributes function accountIndexLength() external view returns (uint256 _length) { return accountIndex.length; } function accountRewardInfo(address _account, uint256 _i) external view returns (uint256 _rewardDebt, uint256 _unclaimedReward, uint256 _minimumRewardBalanceToClaim) { AccountInfo storage _accountInfo = accountInfo[_account]; return (_accountInfo.rewardDebt[_i], _accountInfo.unclaimedReward[_i], _accountInfo.minimumRewardBalanceToClaim[_i]); } constructor(string memory _name, string memory _symbol) ERC20(_name, _symbol) { } function initialize(uint256 _supply, address[N] memory _rewardTokens, address _router, address _wrappedToken, uint256[N] memory _buybackPercents, address _owner) external { require(router == address(0), "already initialized"); router = _router; address _factory = IUniswapV2Router(_router).factory(); uint256 _totalBuybackPercent = 0; for (uint256 _i = 0; _i < N; _i++) { address _rewardToken = _rewardTokens[_i]; uint256 _buybackPercent = _buybackPercents[_i]; address _pair = IUniswapV2Factory(_factory).createPair(_rewardToken, address(this)); address[] memory _path = new address[](2); _path[0] = address(this); _path[1] = _rewardToken; pairs[_i] = _pair; paths[_i] = _path; rewardTokens[_i] = _rewardToken; buybackPercents[_i] = _buybackPercent; _totalBuybackPercent += _buybackPercent; } require(_totalBuybackPercent <= 100e16, "invalid percentages"); wrappedToken = _wrappedToken; silo = LibSilo.createSilo(_rewardTokens); _approve(address(this), _router, type(uint256).max); _mint(_owner, _supply); } function updateLaunchTime(uint256 _launchTime) external onlyOwner { require(_launchTime > block.timestamp, "invalid time"); launchTime = _launchTime; emit UpdateLaunchTime(_launchTime); } function updateMinimumFeeBalanceToBuyback(uint256 _minimumFeeBalanceToBuyback) external onlyOwner { minimumFeeBalanceToBuyback = _minimumFeeBalanceToBuyback; emit UpdateMinimumFeeBalanceToBuyback(_minimumFeeBalanceToBuyback); } function updateMinimumRewardBalanceToClaim(uint256[N] memory _minimumRewardBalanceToClaim) external { AccountInfo storage _accountInfo = accountInfo[msg.sender]; _accountInfo.minimumRewardBalanceToClaim = _minimumRewardBalanceToClaim; emit UpdateMinimumRewardBalanceToClaim(_minimumRewardBalanceToClaim); } function updateExcludeFromRewards(address _account, bool _excludeFromRewards) external onlyOwner { _updateAccount(_account); AccountInfo storage _accountInfo = accountInfo[_account]; _accountInfo.excludeFromRewards = _excludeFromRewards; _postUpdateAccount(_account); emit UpdateExcludeFromRewards(_account, _excludeFromRewards); } function updateExcludeFromRewards(bool _excludeFromRewards) external { _updateAccount(msg.sender); AccountInfo storage _accountInfo = accountInfo[msg.sender]; _accountInfo.excludeFromRewards = _excludeFromRewards; _postUpdateAccount(msg.sender); emit UpdateExcludeFromRewards(msg.sender, _excludeFromRewards); } function _updateAccount(address _account) internal { AccountInfo storage _accountInfo = accountInfo[_account]; if (!_accountInfo.exists) { accountIndex.push(_account); _accountInfo.exists = true; _accountInfo.excludeFromRewards = _account == FURNACE || _account.isContract(); _accountInfo.activeBalance = 0; _accountInfo.rewardDebt = [0, 0, 0, 0, 0, 0, 0, 0, 0]; _accountInfo.unclaimedReward = [0, 0, 0, 0, 0, 0, 0, 0, 0]; _accountInfo.minimumRewardBalanceToClaim = [1, 1, 1, 1, 1, 1, 1, 1, 1]; return; } uint256 _activeBalance = _accountInfo.activeBalance; if (_activeBalance > 0) { for (uint256 _i = 0; _i < N; _i++) { uint256 _rewardDebt = _activeBalance * accRewardPerShare[_i] / 1e36; if (_rewardDebt > _accountInfo.rewardDebt[_i]) { uint256 _rewardAmount = _rewardDebt - _accountInfo.rewardDebt[_i]; _accountInfo.unclaimedReward[_i] += _rewardAmount; _accountInfo.rewardDebt[_i] = _rewardDebt; } } } for (uint256 _i = 0; _i < N; _i++) { uint256 _unclaimedReward = _accountInfo.unclaimedReward[_i]; if (_unclaimedReward >= _accountInfo.minimumRewardBalanceToClaim[_i]) { _accountInfo.unclaimedReward[_i] = 0; rewardBalance[_i] -= _unclaimedReward; address _rewardToken = rewardTokens[_i]; if (_rewardToken != wrappedToken) { IERC20(_rewardToken).safeTransferFrom(silo, _account, _unclaimedReward); } else { IERC20(_rewardToken).safeTransferFrom(silo, address(this), _unclaimedReward); IWrappedToken(_rewardToken).withdraw(_unclaimedReward); payable(_account).sendValue(_unclaimedReward); } } } } function _postUpdateAccount(address _account) internal { AccountInfo storage _accountInfo = accountInfo[_account]; uint256 _oldActiveBalance = _accountInfo.activeBalance; uint256 _newActiveBalance = _accountInfo.excludeFromRewards ? 0 : balanceOf(_account); if (_newActiveBalance != _oldActiveBalance) { _accountInfo.activeBalance = _newActiveBalance; for (uint256 _i = 0; _i < N; _i++) { _accountInfo.rewardDebt[_i] = _newActiveBalance * accRewardPerShare[_i] / 1e36; } totalActiveSupply -= _oldActiveBalance; totalActiveSupply += _newActiveBalance; } } function _transfer(address _from, address _to, uint256 _amount) internal override { if (bypass_) { // internal transfer super._transfer(_from, _to, _amount); return; } if (inswap_) { // fee selling transfer super._transfer(_from, _to, _amount); return; } bool _buying = false; bool _selling = false; for (uint256 _i = 0; _i < N; _i++) { _buying = _buying || _from == pairs[_i]; _selling = _selling || _to == pairs[_i]; } if (_buying || _selling) { // buy/sell bool _restricted = block.timestamp < launchTime && (_buying ? _to : _from) != owner(); require(!_restricted, "unavailable"); // If the sender is not the owner then fee applies uint256 _feeAmount = (_buying ? _to : _from) != owner() ? _amount * (_buying ? BUY_FEE : SELL_FEE) / 100e16 : 0; super._transfer(_from, _to, _amount - _feeAmount); super._transfer(_from, address(this), _feeAmount); return; } // regular transfer super._transfer(_from, _to, _amount); // piggyback buyback operation uint256 _balance = balanceOf(address(this)); if (_balance >= minimumFeeBalanceToBuyback) { inswap_ = true; _approve(address(this), router, _balance); for (uint256 _i = 0; _i < N; _i ++) { uint256 _swapAmount = _balance * buybackPercents[_i] / 100e16; // If the buy back token is the burn token, send it to the furnace if(paths[_i][1] == burnToken) { IUniswapV2Router(router).swapExactTokensForTokens(_swapAmount, 0, paths[_i], FURNACE, block.timestamp); } else { IUniswapV2Router(router).swapExactTokensForTokens(_swapAmount, 0, paths[_i], silo, block.timestamp); } IUniswapV2Pair(pairs[_i]).sync(); } inswap_ = false; if (totalActiveSupply > 0) { for (uint256 _i = 0; _i < N; _i++) { uint256 _rewardBalance = IERC20(rewardTokens[_i]).balanceOf(silo); uint256 _rewardAmount = _rewardBalance - rewardBalance[_i]; if (_rewardAmount > 0) { rewardBalance[_i] = _rewardBalance; accRewardPerShare[_i] += _rewardAmount * 1e36 / totalActiveSupply; } } } } } function _beforeTokenTransfer(address _from, address _to, uint256 _amount) internal override { if (bypass_) return; if (_from != address(0)) { _updateAccount(_from); } if (_to != address(0)) { require(_to != INTERNAL_ADDRESS, "invalid address"); _updateAccount(_to); } _amount; // silences warning } function _afterTokenTransfer(address _from, address _to, uint256 _amount) internal override { if (bypass_) return; if (_from != address(0)) { _postUpdateAccount(_from); } if (_to != address(0)) { _postUpdateAccount(_to); } _amount; // silences warning } receive() external payable {} event UpdateLaunchTime(uint256 _launchTime); event UpdateMinimumFeeBalanceToBuyback(uint256 _minimumFeeBalanceToBuyback); event UpdateMinimumRewardBalanceToClaim(uint256[N] _minimumRewardBalanceToClaim); event UpdateExcludeFromRewards(address indexed _account, bool indexed _excludeFromRewards); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.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 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() { _transferOwnership(_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 { _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); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.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.zeppelin.solutions/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 ERC20 is Context, IERC20, IERC20Metadata { 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. */ constructor(string memory name_, string memory symbol_) { _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: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, 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}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), 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}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); uint256 currentAllowance = _allowances[sender][_msgSender()]; require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); unchecked { _approve(sender, _msgSender(), currentAllowance - 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) { _approve(_msgSender(), spender, _allowances[_msgSender()][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) { uint256 currentAllowance = _allowances[_msgSender()][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(_msgSender(), spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * 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: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[sender] = senderBalance - amount; } _balances[recipient] += amount; emit Transfer(sender, recipient, amount); _afterTokenTransfer(sender, recipient, 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; _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; } _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 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 {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol) 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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (utils/Address.sol) pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @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 * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 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 functionCall(target, data, "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"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(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) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason 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 { // 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 assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (utils/Context.sol) 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; } }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.9; interface IUniswapV2Factory { function getPair(address _tokenA, address _tokenB) external view returns (address _pair); function createPair(address _tokenA, address _tokenB) external returns (address _pair); }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.9; interface IUniswapV2Pair { function sync() external; }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.9; interface IUniswapV2Router { function factory() external view returns (address _factory); function swapExactTokensForTokens( uint256 _amountIn, uint256 _amountOutMin, address[] calldata _path, address _to, uint256 _deadline ) external returns (uint256[] memory _amounts); function swapExactTokensForETH( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.9; interface IWrappedToken { function deposit() external payable; function transfer(address to, uint256 value) external returns (bool); function withdraw(uint256) external; function approve(address spender, uint256 value) external returns (bool); }
{ "optimizer": { "enabled": true, "runs": 777 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"address[9]","name":"_rewardTokens","type":"address[9]"}],"stateMutability":"nonpayable","type":"constructor"}]
Contract Creation Code
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Deployed Bytecode
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
Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : _rewardTokens (address[9]): 0x3Ad2234eBFED9dEEfab94B9719aEbc07f8510D47,0x3333b97138D4b086720b5aE8A7844b1345a33333,0x039e2fB66102314Ce7b64Ce5Ce3E5183bc94aD38,0x50c42dEAcD8Fc9773493ED674b675bE577f2634b,0x59524D5667B299c0813Ba3c99a11C038a3908fBC,0x79bbF4508B1391af3A0F4B30bb5FC4aa9ab0E07C,0xA04BC7140c26fc9BB1F36B1A604C7A5a88fb0E70,0xf26Ff70573ddc8a90Bd7865AF8d7d70B8Ff019bC,0x9fDbC3f8Abc05Fa8f3Ad3C17D2F806c1230c4564
-----Encoded View---------------
9 Constructor Arguments found :
Arg [0] : 0000000000000000000000003ad2234ebfed9deefab94b9719aebc07f8510d47
Arg [1] : 0000000000000000000000003333b97138d4b086720b5ae8a7844b1345a33333
Arg [2] : 000000000000000000000000039e2fb66102314ce7b64ce5ce3e5183bc94ad38
Arg [3] : 00000000000000000000000050c42deacd8fc9773493ed674b675be577f2634b
Arg [4] : 00000000000000000000000059524d5667b299c0813ba3c99a11c038a3908fbc
Arg [5] : 00000000000000000000000079bbf4508b1391af3a0f4b30bb5fc4aa9ab0e07c
Arg [6] : 000000000000000000000000a04bc7140c26fc9bb1f36b1a604c7a5a88fb0e70
Arg [7] : 000000000000000000000000f26ff70573ddc8a90bd7865af8d7d70b8ff019bc
Arg [8] : 0000000000000000000000009fdbc3f8abc05fa8f3ad3c17d2f806c1230c4564
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.