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Contract Name:
L1StandardERC20Gateway
Compiler Version
v0.8.16+commit.07a7930e
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity =0.8.16; import {ClonesUpgradeable} from "@openzeppelin/contracts-upgradeable/proxy/ClonesUpgradeable.sol"; import {IERC20MetadataUpgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol"; import {IL2ERC20Gateway} from "../../L2/gateways/IL2ERC20Gateway.sol"; import {IL1ScrollMessenger} from "../IL1ScrollMessenger.sol"; import {IL1ERC20Gateway} from "./IL1ERC20Gateway.sol"; import {ScrollGatewayBase} from "../../libraries/gateway/ScrollGatewayBase.sol"; import {L1ERC20Gateway} from "./L1ERC20Gateway.sol"; /// @title L1StandardERC20Gateway /// @notice The `L1StandardERC20Gateway` is used to deposit standard ERC20 tokens on layer 1 and /// finalize withdraw the tokens from layer 2. /// @dev The deposited ERC20 tokens are held in this gateway. On finalizing withdraw, the corresponding /// token will be transfer to the recipient directly. Any ERC20 that requires non-standard functionality /// should use a separate gateway. contract L1StandardERC20Gateway is L1ERC20Gateway { /************* * Constants * *************/ /// @notice The address of ScrollStandardERC20 implementation in L2. address public immutable l2TokenImplementation; /// @notice The address of ScrollStandardERC20Factory contract in L2. address public immutable l2TokenFactory; /************* * Variables * *************/ /// @dev The storage slot used as ScrollStandardERC20 implementation in L2, which is deprecated now. address private __l2TokenImplementation; /// @dev The storage slot used as ScrollStandardERC20Factory contract in L2, which is deprecated now. address private __l2TokenFactory; /// @notice Mapping from l1 token address to l2 token address. /// @dev This is not necessary, since we can compute the address directly. But, we use this mapping /// to keep track on whether we have deployed the token in L2 using the L2ScrollStandardERC20Factory and /// pass deploy data on first call to the token. mapping(address => address) private tokenMapping; /*************** * Constructor * ***************/ /// @notice Constructor for `L1StandardERC20Gateway` implementation contract. /// /// @param _counterpart The address of `L2StandardERC20Gateway` contract in L2. /// @param _router The address of `L1GatewayRouter` contract in L1. /// @param _messenger The address of `L1ScrollMessenger` contract in L1. /// @param _l2TokenImplementation The address of `ScrollStandardERC20` implementation in L2. /// @param _l2TokenFactory The address of `ScrollStandardERC20Factory` contract in L2. constructor( address _counterpart, address _router, address _messenger, address _l2TokenImplementation, address _l2TokenFactory ) ScrollGatewayBase(_counterpart, _router, _messenger) { if (_router == address(0) || _l2TokenImplementation == address(0) || _l2TokenFactory == address(0)) { revert ErrorZeroAddress(); } _disableInitializers(); l2TokenImplementation = _l2TokenImplementation; l2TokenFactory = _l2TokenFactory; } /// @notice Initialize the storage of L1StandardERC20Gateway. /// /// @dev The parameters `_counterpart`, `_router`, `_messenger`, `_l2TokenImplementation` and /// `_l2TokenFactory` are no longer used. /// /// @param _counterpart The address of L2StandardERC20Gateway in L2. /// @param _router The address of L1GatewayRouter in L1. /// @param _messenger The address of L1ScrollMessenger in L1. function initialize( address _counterpart, address _router, address _messenger, address, /*_l2TokenImplementation*/ address /*_l2TokenFactory*/ ) external initializer { ScrollGatewayBase._initialize(_counterpart, _router, _messenger); } /************************* * Public View Functions * *************************/ /// @inheritdoc IL1ERC20Gateway function getL2ERC20Address(address _l1Token) public view override returns (address) { // In StandardERC20Gateway, all corresponding l2 tokens are depoyed by Create2 with salt, // we can calculate the l2 address directly. bytes32 _salt = keccak256(abi.encodePacked(counterpart, keccak256(abi.encodePacked(_l1Token)))); return ClonesUpgradeable.predictDeterministicAddress(l2TokenImplementation, _salt, l2TokenFactory); } /********************** * Internal Functions * **********************/ /// @inheritdoc L1ERC20Gateway function _beforeFinalizeWithdrawERC20( address _l1Token, address _l2Token, address, address, uint256, bytes calldata ) internal virtual override { require(msg.value == 0, "nonzero msg.value"); require(_l2Token != address(0), "token address cannot be 0"); require(getL2ERC20Address(_l1Token) == _l2Token, "l2 token mismatch"); // update `tokenMapping` on first withdraw address _storedL2Token = tokenMapping[_l1Token]; if (_storedL2Token == address(0)) { tokenMapping[_l1Token] = _l2Token; } else { require(_storedL2Token == _l2Token, "l2 token mismatch"); } } /// @inheritdoc L1ERC20Gateway function _beforeDropMessage( address, address, uint256 ) internal virtual override { require(msg.value == 0, "nonzero msg.value"); } /// @inheritdoc L1ERC20Gateway function _deposit( address _token, address _to, uint256 _amount, bytes memory _data, uint256 _gasLimit ) internal virtual override nonReentrant { require(_amount > 0, "deposit zero amount"); // 1. Transfer token into this contract. address _from; (_from, _amount, _data) = _transferERC20In(_token, _amount, _data); // 2. Generate message passed to L2StandardERC20Gateway. address _l2Token = tokenMapping[_token]; bytes memory _l2Data; if (_l2Token == address(0)) { // @note we won't update `tokenMapping` here but update the `tokenMapping` on // first successful withdraw. This will prevent user to set arbitrary token // metadata by setting a very small `_gasLimit` on the first tx. _l2Token = getL2ERC20Address(_token); // passing symbol/name/decimal in order to deploy in L2. string memory _symbol = IERC20MetadataUpgradeable(_token).symbol(); string memory _name = IERC20MetadataUpgradeable(_token).name(); uint8 _decimals = IERC20MetadataUpgradeable(_token).decimals(); _l2Data = abi.encode(true, abi.encode(_data, abi.encode(_symbol, _name, _decimals))); } else { _l2Data = abi.encode(false, _data); } bytes memory _message = abi.encodeCall( IL2ERC20Gateway.finalizeDepositERC20, (_token, _l2Token, _from, _to, _amount, _l2Data) ); // 3. Send message to L1ScrollMessenger. IL1ScrollMessenger(messenger).sendMessage{value: msg.value}(counterpart, 0, _message, _gasLimit, _from); emit DepositERC20(_token, _l2Token, _from, _to, _amount, _data); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling 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); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (proxy/Clones.sol) pragma solidity ^0.8.0; /** * @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for * deploying minimal proxy contracts, also known as "clones". * * > To simply and cheaply clone contract functionality in an immutable way, this standard specifies * > a minimal bytecode implementation that delegates all calls to a known, fixed address. * * The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2` * (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the * deterministic method. * * _Available since v3.4._ */ library ClonesUpgradeable { /** * @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`. * * This function uses the create opcode, which should never revert. */ function clone(address implementation) internal returns (address instance) { /// @solidity memory-safe-assembly assembly { // Cleans the upper 96 bits of the `implementation` word, then packs the first 3 bytes // of the `implementation` address with the bytecode before the address. mstore(0x00, or(shr(0xe8, shl(0x60, implementation)), 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000)) // Packs the remaining 17 bytes of `implementation` with the bytecode after the address. mstore(0x20, or(shl(0x78, implementation), 0x5af43d82803e903d91602b57fd5bf3)) instance := create(0, 0x09, 0x37) } require(instance != address(0), "ERC1167: create failed"); } /** * @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`. * * This function uses the create2 opcode and a `salt` to deterministically deploy * the clone. Using the same `implementation` and `salt` multiple time will revert, since * the clones cannot be deployed twice at the same address. */ function cloneDeterministic(address implementation, bytes32 salt) internal returns (address instance) { /// @solidity memory-safe-assembly assembly { // Cleans the upper 96 bits of the `implementation` word, then packs the first 3 bytes // of the `implementation` address with the bytecode before the address. mstore(0x00, or(shr(0xe8, shl(0x60, implementation)), 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000)) // Packs the remaining 17 bytes of `implementation` with the bytecode after the address. mstore(0x20, or(shl(0x78, implementation), 0x5af43d82803e903d91602b57fd5bf3)) instance := create2(0, 0x09, 0x37, salt) } require(instance != address(0), "ERC1167: create2 failed"); } /** * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}. */ function predictDeterministicAddress( address implementation, bytes32 salt, address deployer ) internal pure returns (address predicted) { /// @solidity memory-safe-assembly assembly { let ptr := mload(0x40) mstore(add(ptr, 0x38), deployer) mstore(add(ptr, 0x24), 0x5af43d82803e903d91602b57fd5bf3ff) mstore(add(ptr, 0x14), implementation) mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73) mstore(add(ptr, 0x58), salt) mstore(add(ptr, 0x78), keccak256(add(ptr, 0x0c), 0x37)) predicted := keccak256(add(ptr, 0x43), 0x55) } } /** * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}. */ function predictDeterministicAddress( address implementation, bytes32 salt ) internal view returns (address predicted) { return predictDeterministicAddress(implementation, salt, address(this)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ```solidity * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized != type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuardUpgradeable is Initializable { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; function __ReentrancyGuard_init() internal onlyInitializing { __ReentrancyGuard_init_unchained(); } function __ReentrancyGuard_init_unchained() internal onlyInitializing { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be _NOT_ENTERED require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { return _status == _ENTERED; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @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 (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20PermitUpgradeable { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @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); /** * @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 `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, 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 `from` to `to` 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 from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; import "../extensions/IERC20PermitUpgradeable.sol"; import "../../../utils/AddressUpgradeable.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 SafeERC20Upgradeable { using AddressUpgradeable for address; /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20Upgradeable token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20Upgradeable 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(IERC20Upgradeable 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)); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value)); } /** * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value)); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20Upgradeable token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, approvalCall); } } /** * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`. * Revert on invalid signature. */ function safePermit( IERC20PermitUpgradeable token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @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(IERC20Upgradeable 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"); require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } /** * @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). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20Upgradeable token, bytes memory data) private returns (bool) { // 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 cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && AddressUpgradeable.isContract(address(token)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @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 * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, "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"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or 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 { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // 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 /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @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 ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; interface IL1ERC20Gateway { /********** * Events * **********/ /// @notice Emitted when ERC20 token is withdrawn from L2 to L1 and transfer to recipient. /// @param l1Token The address of the token in L1. /// @param l2Token The address of the token in L2. /// @param from The address of sender in L2. /// @param to The address of recipient in L1. /// @param amount The amount of token withdrawn from L2 to L1. /// @param data The optional calldata passed to recipient in L1. event FinalizeWithdrawERC20( address indexed l1Token, address indexed l2Token, address indexed from, address to, uint256 amount, bytes data ); /// @notice Emitted when someone deposit ERC20 token from L1 to L2. /// @param l1Token The address of the token in L1. /// @param l2Token The address of the token in L2. /// @param from The address of sender in L1. /// @param to The address of recipient in L2. /// @param amount The amount of token will be deposited from L1 to L2. /// @param data The optional calldata passed to recipient in L2. event DepositERC20( address indexed l1Token, address indexed l2Token, address indexed from, address to, uint256 amount, bytes data ); /// @notice Emitted when some ERC20 token is refunded. /// @param token The address of the token in L1. /// @param recipient The address of receiver in L1. /// @param amount The amount of token refunded to receiver. event RefundERC20(address indexed token, address indexed recipient, uint256 amount); /************************* * Public View Functions * *************************/ /// @notice Return the corresponding l2 token address given l1 token address. /// @param _l1Token The address of l1 token. function getL2ERC20Address(address _l1Token) external view returns (address); /***************************** * Public Mutating Functions * *****************************/ /// @notice Deposit some token to a caller's account on L2. /// @dev Make this function payable to send relayer fee in Ether. /// @param _token The address of token in L1. /// @param _amount The amount of token to transfer. /// @param _gasLimit Gas limit required to complete the deposit on L2. function depositERC20( address _token, uint256 _amount, uint256 _gasLimit ) external payable; /// @notice Deposit some token to a recipient's account on L2. /// @dev Make this function payable to send relayer fee in Ether. /// @param _token The address of token in L1. /// @param _to The address of recipient's account on L2. /// @param _amount The amount of token to transfer. /// @param _gasLimit Gas limit required to complete the deposit on L2. function depositERC20( address _token, address _to, uint256 _amount, uint256 _gasLimit ) external payable; /// @notice Deposit some token to a recipient's account on L2 and call. /// @dev Make this function payable to send relayer fee in Ether. /// @param _token The address of token in L1. /// @param _to The address of recipient's account on L2. /// @param _amount The amount of token to transfer. /// @param _data Optional data to forward to recipient's account. /// @param _gasLimit Gas limit required to complete the deposit on L2. function depositERC20AndCall( address _token, address _to, uint256 _amount, bytes memory _data, uint256 _gasLimit ) external payable; /// @notice Complete ERC20 withdraw from L2 to L1 and send fund to recipient's account in L1. /// @dev Make this function payable to handle WETH deposit/withdraw. /// The function should only be called by L1ScrollMessenger. /// The function should also only be called by L2ERC20Gateway in L2. /// @param _l1Token The address of corresponding L1 token. /// @param _l2Token The address of corresponding L2 token. /// @param _from The address of account who withdraw the token in L2. /// @param _to The address of recipient in L1 to receive the token. /// @param _amount The amount of the token to withdraw. /// @param _data Optional data to forward to recipient's account. function finalizeWithdrawERC20( address _l1Token, address _l2Token, address _from, address _to, uint256 _amount, bytes calldata _data ) external payable; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; interface IL1ETHGateway { /********** * Events * **********/ /// @notice Emitted when ETH is withdrawn from L2 to L1 and transfer to recipient. /// @param from The address of sender in L2. /// @param to The address of recipient in L1. /// @param amount The amount of ETH withdrawn from L2 to L1. /// @param data The optional calldata passed to recipient in L1. event FinalizeWithdrawETH(address indexed from, address indexed to, uint256 amount, bytes data); /// @notice Emitted when someone deposit ETH from L1 to L2. /// @param from The address of sender in L1. /// @param to The address of recipient in L2. /// @param amount The amount of ETH will be deposited from L1 to L2. /// @param data The optional calldata passed to recipient in L2. event DepositETH(address indexed from, address indexed to, uint256 amount, bytes data); /// @notice Emitted when some ETH is refunded. /// @param recipient The address of receiver in L1. /// @param amount The amount of ETH refunded to receiver. event RefundETH(address indexed recipient, uint256 amount); /***************************** * Public Mutating Functions * *****************************/ /// @notice Deposit ETH to caller's account in L2. /// @param amount The amount of ETH to be deposited. /// @param gasLimit Gas limit required to complete the deposit on L2. function depositETH(uint256 amount, uint256 gasLimit) external payable; /// @notice Deposit ETH to some recipient's account in L2. /// @param to The address of recipient's account on L2. /// @param amount The amount of ETH to be deposited. /// @param gasLimit Gas limit required to complete the deposit on L2. function depositETH( address to, uint256 amount, uint256 gasLimit ) external payable; /// @notice Deposit ETH to some recipient's account in L2 and call the target contract. /// @param to The address of recipient's account on L2. /// @param amount The amount of ETH to be deposited. /// @param data Optional data to forward to recipient's account. /// @param gasLimit Gas limit required to complete the deposit on L2. function depositETHAndCall( address to, uint256 amount, bytes calldata data, uint256 gasLimit ) external payable; /// @notice Complete ETH withdraw from L2 to L1 and send fund to recipient's account in L1. /// @dev This function should only be called by L1ScrollMessenger. /// This function should also only be called by L1ETHGateway in L2. /// @param from The address of account who withdraw ETH in L2. /// @param to The address of recipient in L1 to receive ETH. /// @param amount The amount of ETH to withdraw. /// @param data Optional data to forward to recipient's account. function finalizeWithdrawETH( address from, address to, uint256 amount, bytes calldata data ) external payable; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; import {IL1ETHGateway} from "./IL1ETHGateway.sol"; import {IL1ERC20Gateway} from "./IL1ERC20Gateway.sol"; interface IL1GatewayRouter is IL1ETHGateway, IL1ERC20Gateway { /********** * Events * **********/ /// @notice Emitted when the address of ETH Gateway is updated. /// @param oldETHGateway The address of the old ETH Gateway. /// @param newEthGateway The address of the new ETH Gateway. event SetETHGateway(address indexed oldETHGateway, address indexed newEthGateway); /// @notice Emitted when the address of default ERC20 Gateway is updated. /// @param oldDefaultERC20Gateway The address of the old default ERC20 Gateway. /// @param newDefaultERC20Gateway The address of the new default ERC20 Gateway. event SetDefaultERC20Gateway(address indexed oldDefaultERC20Gateway, address indexed newDefaultERC20Gateway); /// @notice Emitted when the `gateway` for `token` is updated. /// @param token The address of token updated. /// @param oldGateway The corresponding address of the old gateway. /// @param newGateway The corresponding address of the new gateway. event SetERC20Gateway(address indexed token, address indexed oldGateway, address indexed newGateway); /************************* * Public View Functions * *************************/ /// @notice Return the corresponding gateway address for given token address. /// @param _token The address of token to query. function getERC20Gateway(address _token) external view returns (address); /***************************** * Public Mutating Functions * *****************************/ /// @notice Request ERC20 token transfer from users to gateways. /// @param sender The address of sender to request fund. /// @param token The address of token to request. /// @param amount The amount of token to request. function requestERC20( address sender, address token, uint256 amount ) external returns (uint256); /************************ * Restricted Functions * ************************/ /// @notice Update the address of ETH gateway contract. /// @dev This function should only be called by contract owner. /// @param _ethGateway The address to update. function setETHGateway(address _ethGateway) external; /// @notice Update the address of default ERC20 gateway contract. /// @dev This function should only be called by contract owner. /// @param _defaultERC20Gateway The address to update. function setDefaultERC20Gateway(address _defaultERC20Gateway) external; /// @notice Update the mapping from token address to gateway address. /// @dev This function should only be called by contract owner. /// @param _tokens The list of addresses of tokens to update. /// @param _gateways The list of addresses of gateways to update. function setERC20Gateway(address[] calldata _tokens, address[] calldata _gateways) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; import {IERC20Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol"; import {SafeERC20Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol"; import {IL1ERC20Gateway} from "./IL1ERC20Gateway.sol"; import {IL1GatewayRouter} from "./IL1GatewayRouter.sol"; import {IL2ERC20Gateway} from "../../L2/gateways/IL2ERC20Gateway.sol"; import {ScrollGatewayBase} from "../../libraries/gateway/ScrollGatewayBase.sol"; import {IMessageDropCallback} from "../../libraries/callbacks/IMessageDropCallback.sol"; /// @title L1ERC20Gateway /// @notice The `L1ERC20Gateway` as a base contract for ERC20 gateways in L1. /// It has implementation of common used functions for ERC20 gateways. abstract contract L1ERC20Gateway is IL1ERC20Gateway, IMessageDropCallback, ScrollGatewayBase { using SafeERC20Upgradeable for IERC20Upgradeable; /************* * Variables * *************/ /// @dev The storage slots for future usage. uint256[50] private __gap; /***************************** * Public Mutating Functions * *****************************/ /// @inheritdoc IL1ERC20Gateway function depositERC20( address _token, uint256 _amount, uint256 _gasLimit ) external payable override { _deposit(_token, _msgSender(), _amount, new bytes(0), _gasLimit); } /// @inheritdoc IL1ERC20Gateway function depositERC20( address _token, address _to, uint256 _amount, uint256 _gasLimit ) external payable override { _deposit(_token, _to, _amount, new bytes(0), _gasLimit); } /// @inheritdoc IL1ERC20Gateway function depositERC20AndCall( address _token, address _to, uint256 _amount, bytes memory _data, uint256 _gasLimit ) external payable override { _deposit(_token, _to, _amount, _data, _gasLimit); } /// @inheritdoc IL1ERC20Gateway function finalizeWithdrawERC20( address _l1Token, address _l2Token, address _from, address _to, uint256 _amount, bytes calldata _data ) external payable virtual override onlyCallByCounterpart nonReentrant { _beforeFinalizeWithdrawERC20(_l1Token, _l2Token, _from, _to, _amount, _data); // @note can possible trigger reentrant call to this contract or messenger, // but it seems not a big problem. IERC20Upgradeable(_l1Token).safeTransfer(_to, _amount); _doCallback(_to, _data); emit FinalizeWithdrawERC20(_l1Token, _l2Token, _from, _to, _amount, _data); } /// @inheritdoc IMessageDropCallback function onDropMessage(bytes calldata _message) external payable virtual onlyInDropContext nonReentrant { // _message should start with 0x8431f5c1 => finalizeDepositERC20(address,address,address,address,uint256,bytes) require(bytes4(_message[0:4]) == IL2ERC20Gateway.finalizeDepositERC20.selector, "invalid selector"); // decode (token, receiver, amount) (address _token, , address _receiver, , uint256 _amount, ) = abi.decode( _message[4:], (address, address, address, address, uint256, bytes) ); // do dome check for each custom gateway _beforeDropMessage(_token, _receiver, _amount); IERC20Upgradeable(_token).safeTransfer(_receiver, _amount); emit RefundERC20(_token, _receiver, _amount); } /********************** * Internal Functions * **********************/ /// @dev Internal function hook to perform checks and actions before finalizing the withdrawal. /// @param _l1Token The address of corresponding L1 token in L1. /// @param _l2Token The address of corresponding L2 token in L2. /// @param _from The address of account who withdraw the token in L2. /// @param _to The address of recipient in L1 to receive the token. /// @param _amount The amount of the token to withdraw. /// @param _data Optional data to forward to recipient's account. function _beforeFinalizeWithdrawERC20( address _l1Token, address _l2Token, address _from, address _to, uint256 _amount, bytes calldata _data ) internal virtual; /// @dev Internal function hook to perform checks and actions before dropping the message. /// @param _token The L1 token address. /// @param _receiver The recipient address on L1. /// @param _amount The amount of token to refund. function _beforeDropMessage( address _token, address _receiver, uint256 _amount ) internal virtual; /// @dev Internal function to transfer ERC20 token to this contract. /// @param _token The address of token to transfer. /// @param _amount The amount of token to transfer. /// @param _data The data passed by caller. function _transferERC20In( address _token, uint256 _amount, bytes memory _data ) internal returns ( address, uint256, bytes memory ) { address _sender = _msgSender(); address _from = _sender; if (router == _sender) { // Extract real sender if this call is from L1GatewayRouter. (_from, _data) = abi.decode(_data, (address, bytes)); _amount = IL1GatewayRouter(_sender).requestERC20(_from, _token, _amount); } else { // common practice to handle fee on transfer token. uint256 _before = IERC20Upgradeable(_token).balanceOf(address(this)); IERC20Upgradeable(_token).safeTransferFrom(_from, address(this), _amount); uint256 _after = IERC20Upgradeable(_token).balanceOf(address(this)); // no unchecked here, since some weird token may return arbitrary balance. _amount = _after - _before; } // ignore weird fee on transfer token require(_amount > 0, "deposit zero amount"); return (_from, _amount, _data); } /// @dev Internal function to do all the deposit operations. /// /// @param _token The token to deposit. /// @param _to The recipient address to recieve the token in L2. /// @param _amount The amount of token to deposit. /// @param _data Optional data to forward to recipient's account. /// @param _gasLimit Gas limit required to complete the deposit on L2. function _deposit( address _token, address _to, uint256 _amount, bytes memory _data, uint256 _gasLimit ) internal virtual; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; import {IScrollMessenger} from "../libraries/IScrollMessenger.sol"; interface IL1ScrollMessenger is IScrollMessenger { /********** * Events * **********/ /// @notice Emitted when the maximum number of times each message can be replayed is updated. /// @param oldMaxReplayTimes The old maximum number of times each message can be replayed. /// @param newMaxReplayTimes The new maximum number of times each message can be replayed. event UpdateMaxReplayTimes(uint256 oldMaxReplayTimes, uint256 newMaxReplayTimes); /*********** * Structs * ***********/ struct L2MessageProof { // The index of the batch where the message belongs to. uint256 batchIndex; // Concatenation of merkle proof for withdraw merkle trie. bytes merkleProof; } /***************************** * Public Mutating Functions * *****************************/ /// @notice Relay a L2 => L1 message with message proof. /// @param from The address of the sender of the message. /// @param to The address of the recipient of the message. /// @param value The msg.value passed to the message call. /// @param nonce The nonce of the message to avoid replay attack. /// @param message The content of the message. /// @param proof The proof used to verify the correctness of the transaction. function relayMessageWithProof( address from, address to, uint256 value, uint256 nonce, bytes memory message, L2MessageProof memory proof ) external; /// @notice Replay an existing message. /// @param from The address of the sender of the message. /// @param to The address of the recipient of the message. /// @param value The msg.value passed to the message call. /// @param messageNonce The nonce for the message to replay. /// @param message The content of the message. /// @param newGasLimit New gas limit to be used for this message. /// @param refundAddress The address of account who will receive the refunded fee. function replayMessage( address from, address to, uint256 value, uint256 messageNonce, bytes memory message, uint32 newGasLimit, address refundAddress ) external payable; /// @notice Drop a skipped message. /// @param from The address of the sender of the message. /// @param to The address of the recipient of the message. /// @param value The msg.value passed to the message call. /// @param messageNonce The nonce for the message to drop. /// @param message The content of the message. function dropMessage( address from, address to, uint256 value, uint256 messageNonce, bytes memory message ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; interface IL2ERC20Gateway { /********** * Events * **********/ /// @notice Emitted when ERC20 token is deposited from L1 to L2 and transfer to recipient. /// @param l1Token The address of the token in L1. /// @param l2Token The address of the token in L2. /// @param from The address of sender in L1. /// @param to The address of recipient in L2. /// @param amount The amount of token withdrawn from L1 to L2. /// @param data The optional calldata passed to recipient in L2. event FinalizeDepositERC20( address indexed l1Token, address indexed l2Token, address indexed from, address to, uint256 amount, bytes data ); /// @notice Emitted when someone withdraw ERC20 token from L2 to L1. /// @param l1Token The address of the token in L1. /// @param l2Token The address of the token in L2. /// @param from The address of sender in L2. /// @param to The address of recipient in L1. /// @param amount The amount of token will be deposited from L2 to L1. /// @param data The optional calldata passed to recipient in L1. event WithdrawERC20( address indexed l1Token, address indexed l2Token, address indexed from, address to, uint256 amount, bytes data ); /************************* * Public View Functions * *************************/ /// @notice Return the corresponding l1 token address given l2 token address. /// @param l2Token The address of l2 token. function getL1ERC20Address(address l2Token) external view returns (address); /// @notice Return the corresponding l2 token address given l1 token address. /// @param l1Token The address of l1 token. function getL2ERC20Address(address l1Token) external view returns (address); /***************************** * Public Mutating Functions * *****************************/ /// @notice Withdraw of some token to a caller's account on L1. /// @dev Make this function payable to send relayer fee in Ether. /// @param token The address of token in L2. /// @param amount The amount of token to transfer. /// @param gasLimit Unused, but included for potential forward compatibility considerations. function withdrawERC20( address token, uint256 amount, uint256 gasLimit ) external payable; /// @notice Withdraw of some token to a recipient's account on L1. /// @dev Make this function payable to send relayer fee in Ether. /// @param token The address of token in L2. /// @param to The address of recipient's account on L1. /// @param amount The amount of token to transfer. /// @param gasLimit Unused, but included for potential forward compatibility considerations. function withdrawERC20( address token, address to, uint256 amount, uint256 gasLimit ) external payable; /// @notice Withdraw of some token to a recipient's account on L1 and call. /// @dev Make this function payable to send relayer fee in Ether. /// @param token The address of token in L2. /// @param to The address of recipient's account on L1. /// @param amount The amount of token to transfer. /// @param data Optional data to forward to recipient's account. /// @param gasLimit Unused, but included for potential forward compatibility considerations. function withdrawERC20AndCall( address token, address to, uint256 amount, bytes calldata data, uint256 gasLimit ) external payable; /// @notice Complete a deposit from L1 to L2 and send fund to recipient's account in L2. /// @dev Make this function payable to handle WETH deposit/withdraw. /// The function should only be called by L2ScrollMessenger. /// The function should also only be called by L1ERC20Gateway in L1. /// @param l1Token The address of corresponding L1 token. /// @param l2Token The address of corresponding L2 token. /// @param from The address of account who deposits the token in L1. /// @param to The address of recipient in L2 to receive the token. /// @param amount The amount of the token to deposit. /// @param data Optional data to forward to recipient's account. function finalizeDepositERC20( address l1Token, address l2Token, address from, address to, uint256 amount, bytes calldata data ) external payable; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; interface IMessageDropCallback { function onDropMessage(bytes memory message) external payable; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; interface IScrollGatewayCallback { function onScrollGatewayCallback(bytes memory data) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; library ScrollConstants { /// @notice The address of default cross chain message sender. address internal constant DEFAULT_XDOMAIN_MESSAGE_SENDER = address(1); /// @notice The address for dropping message. /// @dev The first 20 bytes of keccak("drop") address internal constant DROP_XDOMAIN_MESSAGE_SENDER = 0x6f297C61B5C92eF107fFD30CD56AFFE5A273e841; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; interface IScrollGateway { /********** * Errors * **********/ /// @dev Thrown when the given address is `address(0)`. error ErrorZeroAddress(); /// @dev Thrown when the caller is not corresponding `L1ScrollMessenger` or `L2ScrollMessenger`. error ErrorCallerIsNotMessenger(); /// @dev Thrown when the cross chain sender is not the counterpart gateway contract. error ErrorCallerIsNotCounterpartGateway(); /// @dev Thrown when ScrollMessenger is not dropping message. error ErrorNotInDropMessageContext(); /************************* * Public View Functions * *************************/ /// @notice The address of corresponding L1/L2 Gateway contract. function counterpart() external view returns (address); /// @notice The address of L1GatewayRouter/L2GatewayRouter contract. function router() external view returns (address); /// @notice The address of corresponding L1ScrollMessenger/L2ScrollMessenger contract. function messenger() external view returns (address); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; import {OwnableUpgradeable} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol"; import {ReentrancyGuardUpgradeable} from "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol"; import {IScrollGateway} from "./IScrollGateway.sol"; import {IScrollMessenger} from "../IScrollMessenger.sol"; import {IScrollGatewayCallback} from "../callbacks/IScrollGatewayCallback.sol"; import {ScrollConstants} from "../constants/ScrollConstants.sol"; import {ITokenRateLimiter} from "../../rate-limiter/ITokenRateLimiter.sol"; /// @title ScrollGatewayBase /// @notice The `ScrollGatewayBase` is a base contract for gateway contracts used in both in L1 and L2. abstract contract ScrollGatewayBase is ReentrancyGuardUpgradeable, OwnableUpgradeable, IScrollGateway { /************* * Constants * *************/ /// @inheritdoc IScrollGateway address public immutable override counterpart; /// @inheritdoc IScrollGateway address public immutable override router; /// @inheritdoc IScrollGateway address public immutable override messenger; /************* * Variables * *************/ /// @dev The storage slot used as counterpart gateway contract, which is deprecated now. address private __counterpart; /// @dev The storage slot used as gateway router contract, which is deprecated now. address private __router; /// @dev The storage slot used as scroll messenger contract, which is deprecated now. address private __messenger; /// @dev The storage slot used as token rate limiter contract, which is deprecated now. address private __rateLimiter; /// @dev The storage slots for future usage. uint256[46] private __gap; /********************** * Function Modifiers * **********************/ modifier onlyCallByCounterpart() { // check caller is messenger if (_msgSender() != messenger) { revert ErrorCallerIsNotMessenger(); } // check cross domain caller is counterpart gateway if (counterpart != IScrollMessenger(messenger).xDomainMessageSender()) { revert ErrorCallerIsNotCounterpartGateway(); } _; } modifier onlyInDropContext() { // check caller is messenger if (_msgSender() != messenger) { revert ErrorCallerIsNotMessenger(); } // check we are dropping message in ScrollMessenger. if (ScrollConstants.DROP_XDOMAIN_MESSAGE_SENDER != IScrollMessenger(messenger).xDomainMessageSender()) { revert ErrorNotInDropMessageContext(); } _; } /*************** * Constructor * ***************/ constructor( address _counterpart, address _router, address _messenger ) { if (_counterpart == address(0) || _messenger == address(0)) { revert ErrorZeroAddress(); } counterpart = _counterpart; router = _router; messenger = _messenger; } function _initialize( address, address, address ) internal { ReentrancyGuardUpgradeable.__ReentrancyGuard_init(); OwnableUpgradeable.__Ownable_init(); } /********************** * Internal Functions * **********************/ /// @dev Internal function to forward calldata to target contract. /// @param _to The address of contract to call. /// @param _data The calldata passed to the contract. function _doCallback(address _to, bytes memory _data) internal { if (_data.length > 0 && _to.code.length > 0) { IScrollGatewayCallback(_to).onScrollGatewayCallback(_data); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; interface IScrollMessenger { /********** * Events * **********/ /// @notice Emitted when a cross domain message is sent. /// @param sender The address of the sender who initiates the message. /// @param target The address of target contract to call. /// @param value The amount of value passed to the target contract. /// @param messageNonce The nonce of the message. /// @param gasLimit The optional gas limit passed to L1 or L2. /// @param message The calldata passed to the target contract. event SentMessage( address indexed sender, address indexed target, uint256 value, uint256 messageNonce, uint256 gasLimit, bytes message ); /// @notice Emitted when a cross domain message is relayed successfully. /// @param messageHash The hash of the message. event RelayedMessage(bytes32 indexed messageHash); /// @notice Emitted when a cross domain message is failed to relay. /// @param messageHash The hash of the message. event FailedRelayedMessage(bytes32 indexed messageHash); /********** * Errors * **********/ /// @dev Thrown when the given address is `address(0)`. error ErrorZeroAddress(); /************************* * Public View Functions * *************************/ /// @notice Return the sender of a cross domain message. function xDomainMessageSender() external view returns (address); /***************************** * Public Mutating Functions * *****************************/ /// @notice Send cross chain message from L1 to L2 or L2 to L1. /// @param target The address of account who receive the message. /// @param value The amount of ether passed when call target contract. /// @param message The content of the message. /// @param gasLimit Gas limit required to complete the message relay on corresponding chain. function sendMessage( address target, uint256 value, bytes calldata message, uint256 gasLimit ) external payable; /// @notice Send cross chain message from L1 to L2 or L2 to L1. /// @param target The address of account who receive the message. /// @param value The amount of ether passed when call target contract. /// @param message The content of the message. /// @param gasLimit Gas limit required to complete the message relay on corresponding chain. /// @param refundAddress The address of account who will receive the refunded fee. function sendMessage( address target, uint256 value, bytes calldata message, uint256 gasLimit, address refundAddress ) external payable; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.16; interface ITokenRateLimiter { /********** * Events * **********/ /// @notice Emitted when the total limit is updated. /// @param oldTotalLimit The previous value of total limit before updating. /// @param newTotalLimit The current value of total limit after updating. event UpdateTotalLimit(address indexed token, uint256 oldTotalLimit, uint256 newTotalLimit); /********** * Errors * **********/ /// @dev Thrown when the `periodDuration` is initialized to zero. error PeriodIsZero(); /// @dev Thrown when the `totalAmount` is initialized to zero. /// @param token The address of the token. error TotalLimitIsZero(address token); /// @dev Thrown when an amount breaches the total limit in the period. /// @param token The address of the token. error ExceedTotalLimit(address token); /***************************** * Public Mutating Functions * *****************************/ /// @notice Request some token usage for `sender`. /// @param token The address of the token. /// @param amount The amount of token to use. function addUsedAmount(address token, uint256 amount) external; }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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ew","type":"function"},{"inputs":[{"internalType":"bytes","name":"_message","type":"bytes"}],"name":"onDropMessage","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"router","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","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)
000000000000000000000000e2b4795039517653c5ae8c2a9bfdd783b48f447a000000000000000000000000f8b1378579659d8f7ee5f3c929c2f3e332e41fd60000000000000000000000006774bcbd5cecef1336b5300fb5186a12ddd8b367000000000000000000000000c7d86908ccf644db7c69437d5852cedbc1ad3f6900000000000000000000000066e5312edeeaef6e80759a0f789e7914fb401484
-----Decoded View---------------
Arg [0] : _counterpart (address): 0xE2b4795039517653c5Ae8C2A9BFdd783b48f447A
Arg [1] : _router (address): 0xF8B1378579659D8F7EE5f3C929c2f3E332E41Fd6
Arg [2] : _messenger (address): 0x6774Bcbd5ceCeF1336b5300fb5186a12DDD8b367
Arg [3] : _l2TokenImplementation (address): 0xC7d86908ccf644Db7C69437D5852CedBC1aD3f69
Arg [4] : _l2TokenFactory (address): 0x66e5312EDeEAef6e80759A0F789e7914Fb401484
-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000e2b4795039517653c5ae8c2a9bfdd783b48f447a
Arg [1] : 000000000000000000000000f8b1378579659d8f7ee5f3c929c2f3e332e41fd6
Arg [2] : 0000000000000000000000006774bcbd5cecef1336b5300fb5186a12ddd8b367
Arg [3] : 000000000000000000000000c7d86908ccf644db7c69437d5852cedbc1ad3f69
Arg [4] : 00000000000000000000000066e5312edeeaef6e80759a0f789e7914fb401484
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Multichain Portfolio | 29 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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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.