| { | |
| "language": "Solidity", | |
| "sources": { | |
| "contracts/automate/LPTokensManager.sol": { | |
| "content": "// SPDX-License-Identifier: BSD-3-Clause\npragma solidity ^0.8.6;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\nimport \"@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol\";\nimport \"../Storage.sol\";\nimport \"./dex/IPair.sol\";\nimport \"./dex/IRouter.sol\";\n\ncontract LPTokensManager is Ownable {\n using SafeERC20 for IERC20;\n\n /// @notice Storage contract\n Storage public info;\n\n struct Swap {\n address[] path;\n uint256 outMin;\n }\n\n event StorageChanged(address indexed info);\n\n constructor(address _info) {\n require(_info != address(0), \"LPTokensManager::constructor: invalid storage contract address\");\n info = Storage(_info);\n }\n\n /**\n * @notice Change storage contract address.\n * @param _info New storage contract address.\n */\n function changeStorage(address _info) external onlyOwner {\n require(_info != address(0), \"LPTokensManager::changeStorage: invalid storage contract address\");\n info = Storage(_info);\n emit StorageChanged(_info);\n }\n\n function _swap(\n address router,\n uint256 amount,\n uint256 outMin,\n address[] memory path,\n uint256 deadline\n ) internal {\n if (path[0] == path[path.length - 1]) return;\n\n IRouter(router).swapExactTokensForTokensSupportingFeeOnTransferTokens(\n amount,\n outMin,\n path,\n address(this),\n deadline\n );\n }\n\n /**\n * @return Current call commission.\n */\n function fee() public view returns (uint256) {\n uint256 feeUSD = info.getUint(keccak256(\"DFH:Fee:Automate:LPTokensManager\"));\n if (feeUSD == 0) return 0;\n\n (, int256 answer, , , ) = AggregatorV3Interface(info.getAddress(keccak256(\"DFH:Fee:PriceFeed\"))).latestRoundData();\n require(answer > 0, \"LPTokensManager::fee: invalid price feed response\");\n\n return (feeUSD * 1e18) / uint256(answer);\n }\n\n function _payCommission() internal {\n uint256 payFee = fee();\n if (payFee == 0) return;\n require(msg.value >= payFee, \"LPTokensManager::_payCommission: insufficient funds to pay commission\");\n address treasury = info.getAddress(keccak256(\"DFH:Contract:Treasury\"));\n require(treasury != address(0), \"LPTokensManager::_payCommission: invalid treasury contract address\");\n\n // solhint-disable-next-line avoid-low-level-calls\n (bool sentTreasury, ) = payable(treasury).call{value: payFee}(\"\");\n require(sentTreasury, \"LPTokensManager::_payCommission: transfer fee to the treasury failed\");\n if (msg.value > payFee) {\n (bool sentRemained, ) = payable(msg.sender).call{value: msg.value - payFee}(\"\");\n require(sentRemained, \"LPTokensManager::_payCommission: transfer of remained tokens to the sender failed\");\n }\n }\n\n function _returnRemainder(address[3] memory tokens) internal {\n for (uint256 i = 0; i < tokens.length; i++) {\n uint256 tokenBalance = IERC20(tokens[i]).balanceOf(address(this));\n if (tokenBalance > 0) {\n IERC20(tokens[i]).safeTransfer(msg.sender, tokenBalance);\n }\n }\n }\n\n function _approve(\n IERC20 token,\n address spender,\n uint256 amount\n ) internal {\n if (token.allowance(address(this), spender) != 0) {\n token.safeApprove(spender, 0);\n }\n token.safeApprove(spender, amount);\n }\n\n function buyLiquidity(\n uint256 amount,\n address router,\n Swap memory swap0,\n Swap memory swap1,\n IPair to,\n uint256 deadline\n ) external payable {\n require(\n info.getBool(keccak256(abi.encodePacked(\"DFH:Contract:LPTokensManager:allowedRouter:\", router))),\n \"LPTokensManager::buyLiquidity: invalid router address\"\n );\n require(swap0.path[0] == swap1.path[0], \"LPTokensManager::buyLiqudity: start token not equals\");\n\n _payCommission();\n\n // Get tokens in\n address token0 = to.token0();\n require(swap0.path[swap0.path.length - 1] == token0, \"LPTokensManager::buyLiqudity: invalid token0\");\n address token1 = to.token1();\n require(swap1.path[swap1.path.length - 1] == token1, \"LPTokensManager::buyLiqudity: invalid token1\");\n\n // Swap tokens\n IERC20(swap0.path[0]).safeTransferFrom(msg.sender, address(this), amount);\n _approve(IERC20(swap0.path[0]), router, amount);\n uint256 amount0In = amount / 2;\n _swap(router, amount0In, swap0.outMin, swap0.path, deadline);\n uint256 amount1In = amount - amount0In;\n _swap(router, amount1In, swap1.outMin, swap1.path, deadline);\n\n // Add liquidity\n amount0In = IERC20(token0).balanceOf(address(this));\n amount1In = IERC20(token1).balanceOf(address(this));\n _approve(IERC20(token0), router, amount0In);\n _approve(IERC20(token1), router, amount1In);\n IRouter(router).addLiquidity(token0, token1, amount0In, amount1In, 0, 0, msg.sender, deadline);\n\n // Return remainder\n _returnRemainder([token0, token1, swap0.path[0]]);\n }\n\n function sellLiquidity(\n uint256 amount,\n address router,\n Swap memory swap0,\n Swap memory swap1,\n IPair from,\n uint256 deadline\n ) external payable {\n require(\n info.getBool(keccak256(abi.encodePacked(\"DFH:Contract:LPTokensManager:allowedRouter:\", router))),\n \"LPTokensManager::sellLiquidity: invalid router address\"\n );\n require(\n swap0.path[swap0.path.length - 1] == swap1.path[swap1.path.length - 1],\n \"LPTokensManager::sellLiqudity: end token not equals\"\n );\n\n _payCommission();\n\n // Get tokens in\n address token0 = from.token0();\n require(swap0.path[0] == token0, \"LPTokensManager::sellLiqudity: invalid token0\");\n address token1 = from.token1();\n require(swap1.path[0] == token1, \"LPTokensManager::sellLiqudity: invalid token1\");\n\n // Remove liquidity\n IERC20(from).safeTransferFrom(msg.sender, address(this), amount);\n _approve(IERC20(from), router, amount);\n IRouter(router).removeLiquidity(token0, token1, amount, 0, 0, address(this), deadline);\n\n // Swap tokens\n uint256 amount0In = IERC20(token0).balanceOf(address(this));\n _approve(IERC20(token0), router, amount0In);\n _swap(router, amount0In, swap0.outMin, swap0.path, deadline);\n uint256 amount1In = IERC20(token1).balanceOf(address(this));\n _approve(IERC20(token1), router, amount1In);\n _swap(router, amount1In, swap1.outMin, swap1.path, deadline);\n\n _returnRemainder([token0, token1, swap0.path[swap0.path.length - 1]]);\n }\n}\n" | |
| }, | |
| "@openzeppelin/contracts/access/Ownable.sol": { | |
| "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/Context.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n constructor() {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions anymore. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby removing any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n}\n" | |
| }, | |
| "@openzeppelin/contracts/token/ERC20/IERC20.sol": { | |
| "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(address indexed owner, address indexed spender, uint256 value);\n\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `to`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address to, uint256 amount) external returns (bool);\n\n /**\n * @dev Returns the remaining number of tokens that `spender` will be\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\n * zero by default.\n *\n * This value changes when {approve} or {transferFrom} are called.\n */\n function allowance(address owner, address spender) external view returns (uint256);\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\n * that someone may use both the old and the new allowance by unfortunate\n * transaction ordering. One possible solution to mitigate this race\n * condition is to first reduce the spender's allowance to 0 and set the\n * desired value afterwards:\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n *\n * Emits an {Approval} event.\n */\n function approve(address spender, uint256 amount) external returns (bool);\n\n /**\n * @dev Moves `amount` tokens from `from` to `to` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address from,\n address to,\n uint256 amount\n ) external returns (bool);\n}\n" | |
| }, | |
| "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": { | |
| "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../extensions/draft-IERC20Permit.sol\";\nimport \"../../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n using Address for address;\n\n function safeTransfer(\n IERC20 token,\n address to,\n uint256 value\n ) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n }\n\n function safeTransferFrom(\n IERC20 token,\n address from,\n address to,\n uint256 value\n ) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n }\n\n /**\n * @dev Deprecated. This function has issues similar to the ones found in\n * {IERC20-approve}, and its usage is discouraged.\n *\n * Whenever possible, use {safeIncreaseAllowance} and\n * {safeDecreaseAllowance} instead.\n */\n function safeApprove(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n // safeApprove should only be called when setting an initial allowance,\n // or when resetting it to zero. To increase and decrease it, use\n // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n require(\n (value == 0) || (token.allowance(address(this), spender) == 0),\n \"SafeERC20: approve from non-zero to non-zero allowance\"\n );\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n }\n\n function safeIncreaseAllowance(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n uint256 newAllowance = token.allowance(address(this), spender) + value;\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n\n function safeDecreaseAllowance(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n unchecked {\n uint256 oldAllowance = token.allowance(address(this), spender);\n require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n uint256 newAllowance = oldAllowance - value;\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n }\n\n function safePermit(\n IERC20Permit token,\n address owner,\n address spender,\n uint256 value,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) internal {\n uint256 nonceBefore = token.nonces(owner);\n token.permit(owner, spender, value, deadline, v, r, s);\n uint256 nonceAfter = token.nonces(owner);\n require(nonceAfter == nonceBefore + 1, \"SafeERC20: permit did not succeed\");\n }\n\n /**\n * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n * on the return value: the return value is optional (but if data is returned, it must not be false).\n * @param token The token targeted by the call.\n * @param data The call data (encoded using abi.encode or one of its variants).\n */\n function _callOptionalReturn(IERC20 token, bytes memory data) private {\n // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that\n // the target address contains contract code and also asserts for success in the low-level call.\n\n bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n if (returndata.length > 0) {\n // Return data is optional\n require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n }\n }\n}\n" | |
| }, | |
| "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol": { | |
| "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\ninterface AggregatorV3Interface {\n function decimals() external view returns (uint8);\n\n function description() external view returns (string memory);\n\n function version() external view returns (uint256);\n\n // getRoundData and latestRoundData should both raise \"No data present\"\n // if they do not have data to report, instead of returning unset values\n // which could be misinterpreted as actual reported values.\n function getRoundData(uint80 _roundId)\n external\n view\n returns (\n uint80 roundId,\n int256 answer,\n uint256 startedAt,\n uint256 updatedAt,\n uint80 answeredInRound\n );\n\n function latestRoundData()\n external\n view\n returns (\n uint80 roundId,\n int256 answer,\n uint256 startedAt,\n uint256 updatedAt,\n uint80 answeredInRound\n );\n}\n" | |
| }, | |
| "contracts/Storage.sol": { | |
| "content": "// SPDX-License-Identifier: BSD-3-Clause\npragma solidity ^0.8.6;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\n\ncontract Storage is Ownable {\n /// @dev Bytes storage.\n mapping(bytes32 => bytes) private _bytes;\n\n /// @dev Bool storage.\n mapping(bytes32 => bool) private _bool;\n\n /// @dev Uint storage.\n mapping(bytes32 => uint256) private _uint;\n\n /// @dev Int storage.\n mapping(bytes32 => int256) private _int;\n\n /// @dev Address storage.\n mapping(bytes32 => address) private _address;\n\n /// @dev String storage.\n mapping(bytes32 => string) private _string;\n\n event Updated(bytes32 indexed key);\n\n /**\n * @param key The key for the record\n */\n function getBytes(bytes32 key) external view returns (bytes memory) {\n return _bytes[key];\n }\n\n /**\n * @param key The key for the record\n */\n function getBool(bytes32 key) external view returns (bool) {\n return _bool[key];\n }\n\n /**\n * @param key The key for the record\n */\n function getUint(bytes32 key) external view returns (uint256) {\n return _uint[key];\n }\n\n /**\n * @param key The key for the record\n */\n function getInt(bytes32 key) external view returns (int256) {\n return _int[key];\n }\n\n /**\n * @param key The key for the record\n */\n function getAddress(bytes32 key) external view returns (address) {\n return _address[key];\n }\n\n /**\n * @param key The key for the record\n */\n function getString(bytes32 key) external view returns (string memory) {\n return _string[key];\n }\n\n /**\n * @param key The key for the record\n * @param value The value to set.\n */\n function setBytes(bytes32 key, bytes calldata value) external onlyOwner {\n _bytes[key] = value;\n emit Updated(key);\n }\n\n /**\n * @param key The key for the record\n * @param value The value to set.\n */\n function setBool(bytes32 key, bool value) external onlyOwner {\n _bool[key] = value;\n emit Updated(key);\n }\n\n /**\n * @param key The key for the record\n * @param value The value to set.\n */\n function setUint(bytes32 key, uint256 value) external onlyOwner {\n _uint[key] = value;\n emit Updated(key);\n }\n\n /**\n * @param key The key for the record\n * @param value The value to set.\n */\n function setInt(bytes32 key, int256 value) external onlyOwner {\n _int[key] = value;\n emit Updated(key);\n }\n\n /**\n * @param key The key for the record\n * @param value The value to set.\n */\n function setAddress(bytes32 key, address value) external onlyOwner {\n _address[key] = value;\n emit Updated(key);\n }\n\n /**\n * @param key The key for the record\n * @param value The value to set.\n */\n function setString(bytes32 key, string calldata value) external onlyOwner {\n _string[key] = value;\n emit Updated(key);\n }\n\n /**\n * @param key The key for the record\n */\n function deleteBytes(bytes32 key) external onlyOwner {\n delete _bytes[key];\n emit Updated(key);\n }\n\n /**\n * @param key The key for the record\n */\n function deleteBool(bytes32 key) external onlyOwner {\n delete _bool[key];\n emit Updated(key);\n }\n\n /**\n * @param key The key for the record\n */\n function deleteUint(bytes32 key) external onlyOwner {\n delete _uint[key];\n emit Updated(key);\n }\n\n /**\n * @param key The key for the record\n */\n function deleteInt(bytes32 key) external onlyOwner {\n delete _int[key];\n emit Updated(key);\n }\n\n /**\n * @param key The key for the record\n */\n function deleteAddress(bytes32 key) external onlyOwner {\n delete _address[key];\n emit Updated(key);\n }\n\n /**\n * @param key The key for the record\n */\n function deleteString(bytes32 key) external onlyOwner {\n delete _string[key];\n emit Updated(key);\n }\n}\n" | |
| }, | |
| "contracts/automate/dex/IPair.sol": { | |
| "content": "// SPDX-License-Identifier: BSD-3-Clause\npragma solidity ^0.8.6;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\n\ninterface IPair is IERC20 {\n function token0() external view returns (address);\n\n function token1() external view returns (address);\n}\n" | |
| }, | |
| "contracts/automate/dex/IRouter.sol": { | |
| "content": "// SPDX-License-Identifier: BSD-3-Clause\npragma solidity ^0.8.6;\n\ninterface IRouter {\n function swapExactTokensForTokens(\n uint256 amountIn,\n uint256 amountOutMin,\n address[] calldata path,\n address to,\n uint256 deadline\n ) external returns (uint256[] memory amounts);\n\n function swapExactTokensForTokensSupportingFeeOnTransferTokens(\n uint256 amountIn,\n uint256 amountOutMin,\n address[] calldata path,\n address to,\n uint256 deadline\n ) external;\n\n function addLiquidity(\n address tokenA,\n address tokenB,\n uint256 amountADesired,\n uint256 amountBDesired,\n uint256 amountAMin,\n uint256 amountBMin,\n address to,\n uint256 deadline\n )\n external\n returns (\n uint256 amountA,\n uint256 amountB,\n uint256 liquidity\n );\n\n function removeLiquidity(\n address tokenA,\n address tokenB,\n uint256 liquidity,\n uint256 amountAMin,\n uint256 amountBMin,\n address to,\n uint256 deadline\n ) external returns (uint256 amountA, uint256 amountB);\n\n function getAmountsOut(uint256 amountIn, address[] memory path) external view returns (uint256[] memory amounts);\n}\n" | |
| }, | |
| "@openzeppelin/contracts/utils/Context.sol": { | |
| "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n}\n" | |
| }, | |
| "@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol": { | |
| "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n */\ninterface IERC20Permit {\n /**\n * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,\n * given ``owner``'s signed approval.\n *\n * IMPORTANT: The same issues {IERC20-approve} has related to transaction\n * ordering also apply here.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n * - `deadline` must be a timestamp in the future.\n * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\n * over the EIP712-formatted function arguments.\n * - the signature must use ``owner``'s current nonce (see {nonces}).\n *\n * For more information on the signature format, see the\n * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\n * section].\n */\n function permit(\n address owner,\n address spender,\n uint256 value,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) external;\n\n /**\n * @dev Returns the current nonce for `owner`. This value must be\n * included whenever a signature is generated for {permit}.\n *\n * Every successful call to {permit} increases ``owner``'s nonce by one. This\n * prevents a signature from being used multiple times.\n */\n function nonces(address owner) external view returns (uint256);\n\n /**\n * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.\n */\n // solhint-disable-next-line func-name-mixedcase\n function DOMAIN_SEPARATOR() external view returns (bytes32);\n}\n" | |
| }, | |
| "@openzeppelin/contracts/utils/Address.sol": { | |
| "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length > 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance >= value, \"Address: insufficient balance for call\");\n require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(isContract(target), \"Address: delegate call to non-contract\");\n\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n // Look for revert reason and bubble it up if present\n if (returndata.length > 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n }\n}\n" | |
| } | |
| }, | |
| "settings": { | |
| "optimizer": { | |
| "enabled": true, | |
| "runs": 200 | |
| }, | |
| "outputSelection": { | |
| "*": { | |
| "*": [ | |
| "evm.bytecode", | |
| "evm.deployedBytecode", | |
| "devdoc", | |
| "userdoc", | |
| "metadata", | |
| "abi" | |
| ] | |
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| }, | |
| "libraries": {} | |
| } | |
| } |