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Contract Name:
DiscretionaryExitFee
Compiler Version
v0.8.9+commit.e5eed63a
Optimization Enabled:
Yes with 10000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity >0.7.5; import "@eth-optimism/contracts/contracts/libraries/constants/Lib_PredeployAddresses.sol"; import "@eth-optimism/contracts/contracts/L2/messaging/IL2ERC20Bridge.sol"; import "@eth-optimism/contracts/contracts/L2/predeploys/OVM_GasPriceOracle.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/utils/math/SafeMath.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "./L2BillingContract.sol"; contract DiscretionaryExitFee is Ownable { using SafeERC20 for IERC20; using SafeMath for uint256; address public l2Bridge; address public billingContractAddress; constructor(address _l2Bridge) { l2Bridge = _l2Bridge; } modifier onlyWithBillingContract() { require(billingContractAddress != address(0), "Billing contract address is not set"); _; } function configureBillingContractAddress( address _billingContractAddress ) public onlyOwner() { require(_billingContractAddress != address(0), "Billing contract address cannot be zero"); billingContractAddress = _billingContractAddress; } function payAndWithdraw( address _l2Token, uint256 _amount, uint32 _l1Gas, bytes calldata _data ) external payable onlyWithBillingContract { // Collect the exit fee L2BillingContract billingContract = L2BillingContract(billingContractAddress); IERC20(billingContract.feeTokenAddress()).safeTransferFrom(msg.sender, billingContractAddress, billingContract.exitFee()); require(!(msg.value != 0 && _l2Token != Lib_PredeployAddresses.OVM_ETH), "Amount Incorrect"); if (msg.value != 0) { // override the _amount and token address _amount = msg.value; _l2Token = Lib_PredeployAddresses.OVM_ETH; } // transfer funds if users deposit ERC20 if (_l2Token != Lib_PredeployAddresses.OVM_ETH) { IERC20(_l2Token).safeTransferFrom(msg.sender, address(this), _amount); } // call withdrawTo on the l2Bridge IL2ERC20Bridge(l2Bridge).withdrawTo(_l2Token, msg.sender, _amount, _l1Gas, _data); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; /** * @title Lib_PredeployAddresses */ library Lib_PredeployAddresses { // solhint-disable max-line-length address internal constant L2_TO_L1_MESSAGE_PASSER = 0x4200000000000000000000000000000000000000; address internal constant L1_MESSAGE_SENDER = 0x4200000000000000000000000000000000000001; address internal constant DEPLOYER_WHITELIST = 0x4200000000000000000000000000000000000002; address payable internal constant OVM_ETH = payable(0x4200000000000000000000000000000000000006); // solhint-disable-next-line max-line-length address internal constant L2_CROSS_DOMAIN_MESSENGER = 0x4200000000000000000000000000000000000007; address internal constant LIB_ADDRESS_MANAGER = 0x4200000000000000000000000000000000000008; address internal constant PROXY_EOA = 0x4200000000000000000000000000000000000009; address internal constant L2_STANDARD_BRIDGE = 0x4200000000000000000000000000000000000010; address internal constant SEQUENCER_FEE_WALLET = 0x4200000000000000000000000000000000000011; address internal constant L2_STANDARD_TOKEN_FACTORY = 0x4200000000000000000000000000000000000012; address internal constant L1_BLOCK_NUMBER = 0x4200000000000000000000000000000000000013; address internal constant OVM_GAS_PRICE_ORACLE = 0x420000000000000000000000000000000000000F; address internal constant PROXY__BOBA_TURING_PREPAY = 0x4200000000000000000000000000000000000020; address internal constant BOBA_TURING_PREPAY = 0x4200000000000000000000000000000000000021; address internal constant BOBA_TURING_HELPER = 0x4200000000000000000000000000000000000022; address internal constant L2_BOBA = 0x4200000000000000000000000000000000000023; address internal constant PROXY__BOBA_GAS_PRICE_ORACLE = 0x4200000000000000000000000000000000000024; address internal constant BOBA_GAS_PRICE_ORACLE = 0x4200000000000000000000000000000000000025; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; /** * @title IL2ERC20Bridge */ interface IL2ERC20Bridge { /********** * Events * **********/ event WithdrawalInitiated( address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data ); event DepositFinalized( address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data ); event DepositFailed( address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data ); /******************** * Public Functions * ********************/ /** * @dev get the address of the corresponding L1 bridge contract. * @return Address of the corresponding L1 bridge contract. */ function l1TokenBridge() external returns (address); /** * @dev initiate a withdraw of some tokens to the caller's account on L1 * @param _l2Token Address of L2 token where withdrawal was initiated. * @param _amount Amount of the token to withdraw. * param _l1Gas Unused, but included for potential forward compatibility considerations. * @param _data Optional data to forward to L1. This data is provided * solely as a convenience for external contracts. Aside from enforcing a maximum * length, these contracts provide no guarantees about its content. */ function withdraw( address _l2Token, uint256 _amount, uint32 _l1Gas, bytes calldata _data ) external; /** * @dev initiate a withdraw of some token to a recipient's account on L1. * @param _l2Token Address of L2 token where withdrawal is initiated. * @param _to L1 adress to credit the withdrawal to. * @param _amount Amount of the token to withdraw. * param _l1Gas Unused, but included for potential forward compatibility considerations. * @param _data Optional data to forward to L1. This data is provided * solely as a convenience for external contracts. Aside from enforcing a maximum * length, these contracts provide no guarantees about its content. */ function withdrawTo( address _l2Token, address _to, uint256 _amount, uint32 _l1Gas, bytes calldata _data ) external; /************************* * Cross-chain Functions * *************************/ /** * @dev Complete a deposit from L1 to L2, and credits funds to the recipient's balance of this * L2 token. This call will fail if it did not originate from a corresponding deposit in * L1StandardTokenBridge. * @param _l1Token Address for the l1 token this is called with * @param _l2Token Address for the l2 token this is called with * @param _from Account to pull the deposit from on L2. * @param _to Address to receive the withdrawal at * @param _amount Amount of the token to withdraw * @param _data Data provider by the sender on L1. This data is provided * solely as a convenience for external contracts. Aside from enforcing a maximum * length, these contracts provide no guarantees about its content. */ function finalizeDeposit( address _l1Token, address _l2Token, address _from, address _to, uint256 _amount, bytes calldata _data ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; /* External Imports */ import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; /** * @title OVM_GasPriceOracle * @dev This contract exposes the current l2 gas price, a measure of how congested the network * currently is. This measure is used by the Sequencer to determine what fee to charge for * transactions. When the system is more congested, the l2 gas price will increase and fees * will also increase as a result. * * All public variables are set while generating the initial L2 state. The * constructor doesn't run in practice as the L2 state generation script uses * the deployed bytecode instead of running the initcode. */ contract OVM_GasPriceOracle is Ownable { /************* * Variables * *************/ // Current L2 gas price uint256 public gasPrice; // Current L1 base fee uint256 public l1BaseFee; // Amortized cost of batch submission per transaction uint256 public overhead; // Value to scale the fee up by uint256 public scalar; // Number of decimals of the scalar uint256 public decimals; /*************** * Constructor * ***************/ /** * @param _owner Address that will initially own this contract. */ constructor(address _owner) Ownable() { transferOwnership(_owner); } /********** * Events * **********/ event GasPriceUpdated(uint256); event L1BaseFeeUpdated(uint256); event OverheadUpdated(uint256); event ScalarUpdated(uint256); event DecimalsUpdated(uint256); /******************** * Public Functions * ********************/ /** * Allows the owner to modify the l2 gas price. * @param _gasPrice New l2 gas price. */ function setGasPrice(uint256 _gasPrice) public onlyOwner { gasPrice = _gasPrice; emit GasPriceUpdated(_gasPrice); } /** * Allows the owner to modify the l1 base fee. * @param _baseFee New l1 base fee */ function setL1BaseFee(uint256 _baseFee) public onlyOwner { l1BaseFee = _baseFee; emit L1BaseFeeUpdated(_baseFee); } /** * Allows the owner to modify the overhead. * @param _overhead New overhead */ function setOverhead(uint256 _overhead) public onlyOwner { overhead = _overhead; emit OverheadUpdated(_overhead); } /** * Allows the owner to modify the scalar. * @param _scalar New scalar */ function setScalar(uint256 _scalar) public onlyOwner { scalar = _scalar; emit ScalarUpdated(_scalar); } /** * Allows the owner to modify the decimals. * @param _decimals New decimals */ function setDecimals(uint256 _decimals) public onlyOwner { decimals = _decimals; emit DecimalsUpdated(_decimals); } /** * Computes the L1 portion of the fee * based on the size of the RLP encoded tx * and the current l1BaseFee * @param _data Unsigned RLP encoded tx, 6 elements * @return L1 fee that should be paid for the tx */ function getL1Fee(bytes memory _data) public view returns (uint256) { uint256 l1GasUsed = getL1GasUsed(_data); uint256 l1Fee = l1GasUsed * l1BaseFee; uint256 divisor = 10**decimals; uint256 unscaled = l1Fee * scalar; uint256 scaled = unscaled / divisor; return scaled; } /** * Computes the extra L2 gas to cover the * L1 security fee * @param _data Unsigned RLP encoded tx, 6 elements * @return L2 extra gas that should be included in the L2 gas */ function getExtraL2Gas(bytes memory _data) public view returns (uint256) { return getL1Fee(_data) / gasPrice; } /** * Computes the amount of L1 gas used for a transaction * The overhead represents the per batch gas overhead of * posting both transaction and state roots to L1 given larger * batch sizes. * 4 gas for 0 byte * https://github.com/ethereum/go-ethereum/blob/ * 9ada4a2e2c415e6b0b51c50e901336872e028872/params/protocol_params.go#L33 * 16 gas for non zero byte * https://github.com/ethereum/go-ethereum/blob/ * 9ada4a2e2c415e6b0b51c50e901336872e028872/params/protocol_params.go#L87 * This will need to be updated if calldata gas prices change * Account for the transaction being unsigned * Padding is added to account for lack of signature on transaction * 1 byte for RLP V prefix * 1 byte for V * 1 byte for RLP R prefix * 32 bytes for R * 1 byte for RLP S prefix * 32 bytes for S * Total: 68 bytes of padding * @param _data Unsigned RLP encoded tx, 6 elements * @return Amount of L1 gas used for a transaction */ function getL1GasUsed(bytes memory _data) public view returns (uint256) { uint256 total = 0; for (uint256 i = 0; i < _data.length; i++) { if (_data[i] == 0) { total += 4; } else { total += 16; } } uint256 unsigned = total + overhead; return unsigned + (68 * 16); } }
// SPDX-License-Identifier: MIT 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 pragma solidity ^0.8.0; // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. /** * @dev Wrappers over Solidity's arithmetic operations. * * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler * now has built in overflow checking. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } }
// SPDX-License-Identifier: MIT 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() { _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); } }
// SPDX-License-Identifier: MIT pragma solidity >0.7.5; import '@openzeppelin/contracts/token/ERC20/IERC20.sol'; import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol'; contract L2BillingContract { using SafeERC20 for IERC20; /************* * Variables * *************/ address public owner; address public feeTokenAddress; address public l2FeeWallet; uint256 public exitFee; /************* * Events * *************/ event TransferOwnership(address, address); event UpdateExitFee(uint256); event CollectFee(address, uint256); event Withdraw(address, uint256); /************* * Modifiers * *************/ modifier onlyNotInitialized() { require(feeTokenAddress == address(0), "Contract has been initialized"); _; } modifier onlyInitialized() { require(feeTokenAddress != address(0), "Contract has not been initialized"); _; } modifier onlyOwner() { require(owner == msg.sender, "Caller is not the owner"); _; } /************* * Functions * *************/ function initialize(address _feeTokenAddress, address _l2FeeWallet, uint256 _exitFee) public onlyNotInitialized { require(_feeTokenAddress != address(0), "Fee token address cannot be zero"); require(_l2FeeWallet != address(0), "L2 fee wallet cannot be zero"); require(_exitFee > 0, "exit fee cannot be zero"); feeTokenAddress = _feeTokenAddress; l2FeeWallet = _l2FeeWallet; exitFee = _exitFee; owner = msg.sender; } function transferOwnership(address _newOwner) public onlyOwner { require(_newOwner != address(0), "Ownable: new owner is the zero address"); address oldOwner = owner; owner = _newOwner; emit TransferOwnership(oldOwner, _newOwner); } function updateExitFee(uint256 _exitFee) public onlyOwner() { require(_exitFee > 0, "exit fee cannot be zero"); exitFee = _exitFee; emit UpdateExitFee(_exitFee); } function collectFee() external onlyInitialized { IERC20(feeTokenAddress).safeTransferFrom(msg.sender, address(this), exitFee); emit CollectFee(msg.sender, exitFee); } function withdraw() external onlyInitialized { uint256 balance = IERC20(feeTokenAddress).balanceOf(address(this)); require(balance >= 150e18, "Balance is too low"); IERC20(feeTokenAddress).safeTransfer(l2FeeWallet, balance); emit Withdraw(l2FeeWallet, balance); } }
// SPDX-License-Identifier: MIT 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: MIT 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 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); } } } }
{ "optimizer": { "enabled": true, "runs": 10000 }, "metadata": { "bytecodeHash": "none", "useLiteralContent": true }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"address","name":"_l2Bridge","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"billingContractAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_billingContractAddress","type":"address"}],"name":"configureBillingContractAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"l2Bridge","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_l2Token","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"uint32","name":"_l1Gas","type":"uint32"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"payAndWithdraw","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000004200000000000000000000000000000000000010
-----Decoded View---------------
Arg [0] : _l2Bridge (address): 0x4200000000000000000000000000000000000010
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000004200000000000000000000000000000000000010
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