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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0xE01efbeb...C0734c846 The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
OptimismMintableERC20Factory
Compiler Version
v0.8.15+commit.e14f2714
Optimization Enabled:
Yes with 999999 runs
Other Settings:
london EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.15; import { OptimismMintableERC20 } from "src/universal/OptimismMintableERC20.sol"; import { ISemver } from "src/universal/ISemver.sol"; import { Initializable } from "@openzeppelin/contracts/proxy/utils/Initializable.sol"; /// @custom:proxied /// @custom:predeployed 0x4200000000000000000000000000000000000012 /// @title OptimismMintableERC20Factory /// @notice OptimismMintableERC20Factory is a factory contract that generates OptimismMintableERC20 /// contracts on the network it's deployed to. Simplifies the deployment process for users /// who may be less familiar with deploying smart contracts. Designed to be backwards /// compatible with the older StandardL2ERC20Factory contract. contract OptimismMintableERC20Factory is ISemver, Initializable { /// @custom:spacer OptimismMintableERC20Factory's initializer slot spacing /// @notice Spacer to avoid packing into the initializer slot bytes30 private spacer_0_2_30; /// @notice Address of the StandardBridge on this chain. /// @custom:network-specific address public bridge; /// @notice Reserve extra slots in the storage layout for future upgrades. /// A gap size of 49 was chosen here, so that the first slot used in a child contract /// would be 1 plus a multiple of 50. uint256[49] private __gap; /// @custom:legacy /// @notice Emitted whenever a new OptimismMintableERC20 is created. Legacy version of the newer /// OptimismMintableERC20Created event. We recommend relying on that event instead. /// @param remoteToken Address of the token on the remote chain. /// @param localToken Address of the created token on the local chain. event StandardL2TokenCreated(address indexed remoteToken, address indexed localToken); /// @notice Emitted whenever a new OptimismMintableERC20 is created. /// @param localToken Address of the created token on the local chain. /// @param remoteToken Address of the corresponding token on the remote chain. /// @param deployer Address of the account that deployed the token. event OptimismMintableERC20Created(address indexed localToken, address indexed remoteToken, address deployer); /// @notice The semver MUST be bumped any time that there is a change in /// the OptimismMintableERC20 token contract since this contract /// is responsible for deploying OptimismMintableERC20 contracts. /// @notice Semantic version. /// @custom:semver 1.9.0 string public constant version = "1.9.0"; /// @notice Constructs the OptimismMintableERC20Factory contract. constructor() { initialize({ _bridge: address(0) }); } /// @notice Initializes the contract. /// @param _bridge Address of the StandardBridge on this chain. function initialize(address _bridge) public initializer { bridge = _bridge; } /// @notice Getter function for the address of the StandardBridge on this chain. /// Public getter is legacy and will be removed in the future. Use `bridge` instead. /// @return Address of the StandardBridge on this chain. /// @custom:legacy function BRIDGE() external view returns (address) { return bridge; } /// @custom:legacy /// @notice Creates an instance of the OptimismMintableERC20 contract. Legacy version of the /// newer createOptimismMintableERC20 function, which has a more intuitive name. /// @param _remoteToken Address of the token on the remote chain. /// @param _name ERC20 name. /// @param _symbol ERC20 symbol. /// @return Address of the newly created token. function createStandardL2Token( address _remoteToken, string memory _name, string memory _symbol ) external returns (address) { return createOptimismMintableERC20(_remoteToken, _name, _symbol); } /// @notice Creates an instance of the OptimismMintableERC20 contract. /// @param _remoteToken Address of the token on the remote chain. /// @param _name ERC20 name. /// @param _symbol ERC20 symbol. /// @return Address of the newly created token. function createOptimismMintableERC20( address _remoteToken, string memory _name, string memory _symbol ) public returns (address) { return createOptimismMintableERC20WithDecimals(_remoteToken, _name, _symbol, 18); } /// @notice Creates an instance of the OptimismMintableERC20 contract, with specified decimals. /// @param _remoteToken Address of the token on the remote chain. /// @param _name ERC20 name. /// @param _symbol ERC20 symbol. /// @param _decimals ERC20 decimals /// @return Address of the newly created token. function createOptimismMintableERC20WithDecimals( address _remoteToken, string memory _name, string memory _symbol, uint8 _decimals ) public returns (address) { require(_remoteToken != address(0), "OptimismMintableERC20Factory: must provide remote token address"); bytes32 salt = keccak256(abi.encode(_remoteToken, _name, _symbol, _decimals)); address localToken = address(new OptimismMintableERC20{ salt: salt }(bridge, _remoteToken, _name, _symbol, _decimals)); // Emit the old event too for legacy support. emit StandardL2TokenCreated(_remoteToken, localToken); // Emit the updated event. The arguments here differ from the legacy event, but // are consistent with the ordering used in StandardBridge events. emit OptimismMintableERC20Created(localToken, _remoteToken, msg.sender); return localToken; } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.15; import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol"; import { ILegacyMintableERC20, IOptimismMintableERC20 } from "src/universal/IOptimismMintableERC20.sol"; import { ISemver } from "src/universal/ISemver.sol"; /// @title OptimismMintableERC20 /// @notice OptimismMintableERC20 is a standard extension of the base ERC20 token contract designed /// to allow the StandardBridge contracts to mint and burn tokens. This makes it possible to /// use an OptimismMintablERC20 as the L2 representation of an L1 token, or vice-versa. /// Designed to be backwards compatible with the older StandardL2ERC20 token which was only /// meant for use on L2. contract OptimismMintableERC20 is IOptimismMintableERC20, ILegacyMintableERC20, ERC20, ISemver { /// @notice Address of the corresponding version of this token on the remote chain. address public immutable REMOTE_TOKEN; /// @notice Address of the StandardBridge on this network. address public immutable BRIDGE; /// @notice Decimals of the token uint8 private immutable DECIMALS; /// @notice Emitted whenever tokens are minted for an account. /// @param account Address of the account tokens are being minted for. /// @param amount Amount of tokens minted. event Mint(address indexed account, uint256 amount); /// @notice Emitted whenever tokens are burned from an account. /// @param account Address of the account tokens are being burned from. /// @param amount Amount of tokens burned. event Burn(address indexed account, uint256 amount); /// @notice A modifier that only allows the bridge to call modifier onlyBridge() { require(msg.sender == BRIDGE, "OptimismMintableERC20: only bridge can mint and burn"); _; } /// @notice Semantic version. /// @custom:semver 1.3.0 string public constant version = "1.3.0"; /// @param _bridge Address of the L2 standard bridge. /// @param _remoteToken Address of the corresponding L1 token. /// @param _name ERC20 name. /// @param _symbol ERC20 symbol. constructor( address _bridge, address _remoteToken, string memory _name, string memory _symbol, uint8 _decimals ) ERC20(_name, _symbol) { REMOTE_TOKEN = _remoteToken; BRIDGE = _bridge; DECIMALS = _decimals; } /// @notice Allows the StandardBridge on this network to mint tokens. /// @param _to Address to mint tokens to. /// @param _amount Amount of tokens to mint. function mint( address _to, uint256 _amount ) external virtual override(IOptimismMintableERC20, ILegacyMintableERC20) onlyBridge { _mint(_to, _amount); emit Mint(_to, _amount); } /// @notice Allows the StandardBridge on this network to burn tokens. /// @param _from Address to burn tokens from. /// @param _amount Amount of tokens to burn. function burn( address _from, uint256 _amount ) external virtual override(IOptimismMintableERC20, ILegacyMintableERC20) onlyBridge { _burn(_from, _amount); emit Burn(_from, _amount); } /// @notice ERC165 interface check function. /// @param _interfaceId Interface ID to check. /// @return Whether or not the interface is supported by this contract. function supportsInterface(bytes4 _interfaceId) external pure virtual returns (bool) { bytes4 iface1 = type(IERC165).interfaceId; // Interface corresponding to the legacy L2StandardERC20. bytes4 iface2 = type(ILegacyMintableERC20).interfaceId; // Interface corresponding to the updated OptimismMintableERC20 (this contract). bytes4 iface3 = type(IOptimismMintableERC20).interfaceId; return _interfaceId == iface1 || _interfaceId == iface2 || _interfaceId == iface3; } /// @custom:legacy /// @notice Legacy getter for the remote token. Use REMOTE_TOKEN going forward. function l1Token() public view returns (address) { return REMOTE_TOKEN; } /// @custom:legacy /// @notice Legacy getter for the bridge. Use BRIDGE going forward. function l2Bridge() public view returns (address) { return BRIDGE; } /// @custom:legacy /// @notice Legacy getter for REMOTE_TOKEN. function remoteToken() public view returns (address) { return REMOTE_TOKEN; } /// @custom:legacy /// @notice Legacy getter for BRIDGE. function bridge() public view returns (address) { return BRIDGE; } /// @dev Returns the number of decimals used to get its user representation. /// For example, if `decimals` equals `2`, a balance of `505` tokens should /// be displayed to a user as `5.05` (`505 / 10 ** 2`). /// NOTE: This information is only used for _display_ purposes: it in /// no way affects any of the arithmetic of the contract, including /// {IERC20-balanceOf} and {IERC20-transfer}. function decimals() public view override returns (uint8) { return DECIMALS; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /// @title ISemver /// @notice ISemver is a simple contract for ensuring that contracts are /// versioned using semantic versioning. interface ISemver { /// @notice Getter for the semantic version of the contract. This is not /// meant to be used onchain but instead meant to be used by offchain /// tooling. /// @return Semver contract version as a string. function version() external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/Address.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] * ``` * 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. Equivalent to `reinitializer(1)`. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!Address.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. * * `initializer` is equivalent to `reinitializer(1)`, so 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. * * 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. */ 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. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; } _balances[to] += amount; emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol"; /// @title IOptimismMintableERC20 /// @notice This interface is available on the OptimismMintableERC20 contract. /// We declare it as a separate interface so that it can be used in /// custom implementations of OptimismMintableERC20. interface IOptimismMintableERC20 is IERC165 { function remoteToken() external view returns (address); function bridge() external returns (address); function mint(address _to, uint256 _amount) external; function burn(address _from, uint256 _amount) external; } /// @custom:legacy /// @title ILegacyMintableERC20 /// @notice This interface was available on the legacy L2StandardERC20 contract. /// It remains available on the OptimismMintableERC20 contract for /// backwards compatibility. interface ILegacyMintableERC20 is IERC165 { function l1Token() external view returns (address); function mint(address _to, uint256 _amount) external; function burn(address _from, uint256 _amount) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @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 * ==== * * [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://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 /// @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 (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @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 v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
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Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"localToken","type":"address"},{"indexed":true,"internalType":"address","name":"remoteToken","type":"address"},{"indexed":false,"internalType":"address","name":"deployer","type":"address"}],"name":"OptimismMintableERC20Created","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"remoteToken","type":"address"},{"indexed":true,"internalType":"address","name":"localToken","type":"address"}],"name":"StandardL2TokenCreated","type":"event"},{"inputs":[],"name":"BRIDGE","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"bridge","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_remoteToken","type":"address"},{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"}],"name":"createOptimismMintableERC20","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_remoteToken","type":"address"},{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"}],"name":"createOptimismMintableERC20WithDecimals","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_remoteToken","type":"address"},{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"}],"name":"createStandardL2Token","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_bridge","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"}]
Deployed Bytecode
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Multichain Portfolio | 30 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.