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Latest 25 from a total of 448 transactions
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Transfer Tokens | 20078336 | 19 hrs ago | IN | 0.0001533 ETH | 0.00449952 | ||||
Transfer Tokens | 20055602 | 3 days ago | IN | 0.00013881 ETH | 0.00307772 | ||||
Transfer Tokens | 20054951 | 4 days ago | IN | 0.00014075 ETH | 0.00305948 | ||||
Transfer Tokens | 20041285 | 5 days ago | IN | 0.00013855 ETH | 0.00056044 | ||||
Transfer Tokens | 20041285 | 5 days ago | IN | 0.00013855 ETH | 0.00352095 | ||||
Transfer Tokens | 20037048 | 6 days ago | IN | 0.00013528 ETH | 0.00146413 | ||||
Transfer Tokens | 20033429 | 7 days ago | IN | 0.00013661 ETH | 0.00526407 | ||||
Transfer Tokens | 20033155 | 7 days ago | IN | 0.00013661 ETH | 0.00392884 | ||||
Transfer Tokens | 20032347 | 7 days ago | IN | 0.00013397 ETH | 0.00348831 | ||||
Accept Ownership | 20031745 | 7 days ago | IN | 0 ETH | 0.00049549 | ||||
Transfer Ownersh... | 20031719 | 7 days ago | IN | 0 ETH | 0.00062989 | ||||
Transfer Tokens | 20029982 | 7 days ago | IN | 0.00013704 ETH | 0.00201694 | ||||
Transfer Tokens | 20029870 | 7 days ago | IN | 0.00013213 ETH | 0.00210406 | ||||
Transfer Tokens | 20028165 | 7 days ago | IN | 0.00014289 ETH | 0.0053985 | ||||
Transfer Tokens | 20028105 | 7 days ago | IN | 0.00013966 ETH | 0.00593269 | ||||
Transfer Tokens | 20025914 | 8 days ago | IN | 0.0001359 ETH | 0.00732545 | ||||
Transfer Tokens | 20025554 | 8 days ago | IN | 0.0001359 ETH | 0.00548189 | ||||
Transfer Tokens | 20022373 | 8 days ago | IN | 0.0001376 ETH | 0.00131494 | ||||
Transfer Tokens | 20019565 | 9 days ago | IN | 0.00013782 ETH | 0.0038584 | ||||
Transfer Tokens | 20010750 | 10 days ago | IN | 0.00013394 ETH | 0.00173083 | ||||
Transfer Tokens | 20005653 | 10 days ago | IN | 0.00013449 ETH | 0.00323506 | ||||
Transfer Tokens | 20005638 | 10 days ago | IN | 0.00013449 ETH | 0.00343276 | ||||
Transfer Tokens | 20005508 | 10 days ago | IN | 0.00013449 ETH | 0.00282701 | ||||
Transfer Tokens | 20000236 | 11 days ago | IN | 0.00013254 ETH | 0.00097678 | ||||
Transfer Tokens | 19998430 | 11 days ago | IN | 0.00013366 ETH | 0.00314102 |
Latest 25 internal transactions (View All)
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Parent Transaction Hash | Block | From | To | Value | ||
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20078336 | 19 hrs ago | 0.0001533 ETH | ||||
20055602 | 3 days ago | 0.00013881 ETH | ||||
20054951 | 4 days ago | 0.00014075 ETH | ||||
20041285 | 5 days ago | 0.00013855 ETH | ||||
20037048 | 6 days ago | 0.00013528 ETH | ||||
20033429 | 7 days ago | 0.00013661 ETH | ||||
20033155 | 7 days ago | 0.00013661 ETH | ||||
20032347 | 7 days ago | 0.00013397 ETH | ||||
20029982 | 7 days ago | 0.00013213 ETH | ||||
20029870 | 7 days ago | 0.00013213 ETH | ||||
20028165 | 7 days ago | 0.00013966 ETH | ||||
20028105 | 7 days ago | 0.00013966 ETH | ||||
20025914 | 8 days ago | 0.0001359 ETH | ||||
20025554 | 8 days ago | 0.0001359 ETH | ||||
20022373 | 8 days ago | 0.0001376 ETH | ||||
20019565 | 9 days ago | 0.00013782 ETH | ||||
20010750 | 10 days ago | 0.00013394 ETH | ||||
20005653 | 10 days ago | 0.00013449 ETH | ||||
20005638 | 10 days ago | 0.00013449 ETH | ||||
20005508 | 10 days ago | 0.00013449 ETH | ||||
20000236 | 11 days ago | 0.00013254 ETH | ||||
19998430 | 11 days ago | 0.00013366 ETH | ||||
19984231 | 13 days ago | 0.00014605 ETH | ||||
19977674 | 14 days ago | 0.00013577 ETH | ||||
19974951 | 15 days ago | 0.00013629 ETH |
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Contract Source Code Verified (Exact Match)
Contract Name:
SnailEthereumTokenMigration
Compiler Version
v0.8.24+commit.e11b9ed9
Optimization Enabled:
Yes with 1000000 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.24; import "@openzeppelin/contracts/interfaces/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/utils/ReentrancyGuard.sol"; import "@openzeppelin/contracts/access/Ownable2Step.sol"; import "@chainlink/contracts-ccip/src/v0.8/ccip/libraries/Client.sol"; import "@chainlink/contracts-ccip/src/v0.8/ccip/interfaces/IRouterClient.sol"; import "@chainlink/contracts-ccip/src/v0.8/shared/interfaces/IOwnable.sol"; import "./interfaces/ISnailEthereumTokenMigration.sol"; contract SnailEthereumTokenMigration is ISnailEthereumTokenMigration, Ownable2Step, ReentrancyGuard { using SafeERC20 for IERC20; IERC20 public immutable tokenToTransfer; uint64 public immutable destinationChain; address public destinationReceiver; IRouterClient public immutable crossChainRouter; mapping(address => uint256) private amountsTransferred; receive() external payable {} // allow contract accept ETH constructor(IERC20 _tokenToTransfer, IRouterClient _crossChainRouter, uint64 _destinationChain) Ownable(msg.sender) { require(address(_tokenToTransfer) != address(0), "Token address cannot be zero"); require(address(_crossChainRouter) != address(0), "Cross chain router address cannot be zero"); tokenToTransfer = _tokenToTransfer; tokenToTransfer.safeIncreaseAllowance(IOwnable(address(tokenToTransfer)).owner(), tokenToTransfer.totalSupply()); crossChainRouter = _crossChainRouter; destinationChain = _destinationChain; } function transferTokens() external payable override nonReentrant { require(destinationReceiver != address(0), "Destination receiver not set"); require(amountsTransferred[msg.sender] == 0, "Tokens for this address have already been migrated"); uint256 amount = tokenToTransfer.balanceOf(msg.sender); require(amount > 0, "Transfer amount must be greater than 0"); tokenToTransfer.safeTransferFrom(msg.sender, address(this), amount); amountsTransferred[msg.sender] = amount; Client.EVM2AnyMessage memory message = Client.EVM2AnyMessage({ receiver: abi.encode(destinationReceiver), data: abi.encode(msg.sender, amount), tokenAmounts: new Client.EVMTokenAmount[](0) , extraArgs: "", feeToken: address(0) }); uint256 feeAmount = crossChainRouter.getFee(destinationChain, message); require(msg.value >= feeAmount, "Insufficient fee for transaction"); bytes32 messageId = crossChainRouter.ccipSend{value: feeAmount} (destinationChain, message); emit TokensTransferred(messageId, amount); } function getTransferTokensFee() external override view returns (uint256) { require(destinationReceiver != address(0), "Destination receiver not set"); Client.EVM2AnyMessage memory message = Client.EVM2AnyMessage({ receiver: abi.encode(destinationReceiver), data: abi.encode(msg.sender, tokenToTransfer.balanceOf(msg.sender)), tokenAmounts: new Client.EVMTokenAmount[](0) , extraArgs: "", feeToken: address(0) }); return crossChainRouter.getFee(destinationChain, message); } function getTransferredTokensAmount(address holder) external view returns (uint256) { require(holder != address(0), "Holder address cannot be zero"); return amountsTransferred[holder]; } function setDestinationReceiver(address receiver) external override onlyOwner { require(receiver != address(0), "Invalid destination receiver address"); destinationReceiver = receiver; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {Client} from "../libraries/Client.sol"; interface IRouterClient { error UnsupportedDestinationChain(uint64 destChainSelector); error InsufficientFeeTokenAmount(); error InvalidMsgValue(); /// @notice Checks if the given chain ID is supported for sending/receiving. /// @param chainSelector The chain to check. /// @return supported is true if it is supported, false if not. function isChainSupported(uint64 chainSelector) external view returns (bool supported); /// @notice Gets a list of all supported tokens which can be sent or received /// to/from a given chain id. /// @param chainSelector The chainSelector. /// @return tokens The addresses of all tokens that are supported. function getSupportedTokens(uint64 chainSelector) external view returns (address[] memory tokens); /// @param destinationChainSelector The destination chainSelector /// @param message The cross-chain CCIP message including data and/or tokens /// @return fee returns execution fee for the message /// delivery to destination chain, denominated in the feeToken specified in the message. /// @dev Reverts with appropriate reason upon invalid message. function getFee( uint64 destinationChainSelector, Client.EVM2AnyMessage memory message ) external view returns (uint256 fee); /// @notice Request a message to be sent to the destination chain /// @param destinationChainSelector The destination chain ID /// @param message The cross-chain CCIP message including data and/or tokens /// @return messageId The message ID /// @dev Note if msg.value is larger than the required fee (from getFee) we accept /// the overpayment with no refund. /// @dev Reverts with appropriate reason upon invalid message. function ccipSend( uint64 destinationChainSelector, Client.EVM2AnyMessage calldata message ) external payable returns (bytes32); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // End consumer library. library Client { /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers. struct EVMTokenAmount { address token; // token address on the local chain. uint256 amount; // Amount of tokens. } struct Any2EVMMessage { bytes32 messageId; // MessageId corresponding to ccipSend on source. uint64 sourceChainSelector; // Source chain selector. bytes sender; // abi.decode(sender) if coming from an EVM chain. bytes data; // payload sent in original message. EVMTokenAmount[] destTokenAmounts; // Tokens and their amounts in their destination chain representation. } // If extraArgs is empty bytes, the default is 200k gas limit. struct EVM2AnyMessage { bytes receiver; // abi.encode(receiver address) for dest EVM chains bytes data; // Data payload EVMTokenAmount[] tokenAmounts; // Token transfers address feeToken; // Address of feeToken. address(0) means you will send msg.value. bytes extraArgs; // Populate this with _argsToBytes(EVMExtraArgsV1) } // bytes4(keccak256("CCIP EVMExtraArgsV1")); bytes4 public constant EVM_EXTRA_ARGS_V1_TAG = 0x97a657c9; struct EVMExtraArgsV1 { uint256 gasLimit; } function _argsToBytes(EVMExtraArgsV1 memory extraArgs) internal pure returns (bytes memory bts) { return abi.encodeWithSelector(EVM_EXTRA_ARGS_V1_TAG, extraArgs); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IOwnable { function owner() external returns (address); function transferOwnership(address recipient) external; function acceptOwnership() external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol) pragma solidity ^0.8.20; import {Context} from "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * The initial owner is set to the address provided by the deployer. This can * later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; /** * @dev The caller account is not authorized to perform an operation. */ error OwnableUnauthorizedAccount(address account); /** * @dev The owner is not a valid owner account. (eg. `address(0)`) */ error OwnableInvalidOwner(address owner); event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the address provided by the deployer as the initial owner. */ constructor(address initialOwner) { if (initialOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(initialOwner); } /** * @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 { if (owner() != _msgSender()) { revert OwnableUnauthorizedAccount(_msgSender()); } } /** * @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 { if (newOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable2Step.sol) pragma solidity ^0.8.20; import {Ownable} from "./Ownable.sol"; /** * @dev Contract module which provides access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * The initial owner is specified at deployment time in the constructor for `Ownable`. This * can later be changed with {transferOwnership} and {acceptOwnership}. * * This module is used through inheritance. It will make available all functions * from parent (Ownable). */ abstract contract Ownable2Step is Ownable { address private _pendingOwner; event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner); /** * @dev Returns the address of the pending owner. */ function pendingOwner() public view virtual returns (address) { return _pendingOwner; } /** * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual override onlyOwner { _pendingOwner = newOwner; emit OwnershipTransferStarted(owner(), newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner. * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual override { delete _pendingOwner; super._transferOwnership(newOwner); } /** * @dev The new owner accepts the ownership transfer. */ function acceptOwnership() public virtual { address sender = _msgSender(); if (pendingOwner() != sender) { revert OwnableUnauthorizedAccount(sender); } _transferOwnership(sender); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "../token/ERC20/IERC20.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.20; /** * @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. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ interface IERC20Permit { /** * @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]. * * CAUTION: See Security Considerations above. */ 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 v5.0.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.20; /** * @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 value of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the value of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool); /** * @dev Moves a `value` amount of tokens from `from` to `to` using the * allowance mechanism. `value` 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 value) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; import {IERC20Permit} from "../extensions/IERC20Permit.sol"; import {Address} from "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; /** * @dev An operation with an ERC20 token failed. */ error SafeERC20FailedOperation(address token); /** * @dev Indicates a failed `decreaseAllowance` request. */ error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease); /** * @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(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transfer, (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(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, 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(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); forceApprove(token, spender, oldAllowance + value); } /** * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no * value, non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal { unchecked { uint256 currentAllowance = token.allowance(address(this), spender); if (currentAllowance < requestedDecrease) { revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease); } forceApprove(token, spender, currentAllowance - requestedDecrease); } } /** * @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(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value)); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0))); _callOptionalReturn(token, approvalCall); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data); if (returndata.length != 0 && !abi.decode(returndata, (bool))) { revert SafeERC20FailedOperation(address(token)); } } /** * @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(IERC20 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))) && address(token).code.length > 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol) pragma solidity ^0.8.20; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev The ETH balance of the account is not enough to perform the operation. */ error AddressInsufficientBalance(address account); /** * @dev There's no code at `target` (it is not a contract). */ error AddressEmptyCode(address target); /** * @dev A call to an address target failed. The target may have reverted. */ error FailedInnerCall(); /** * @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/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { if (address(this).balance < amount) { revert AddressInsufficientBalance(address(this)); } (bool success, ) = recipient.call{value: amount}(""); if (!success) { revert FailedInnerCall(); } } /** * @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 or custom error, it is bubbled * up by this function (like regular Solidity function calls). However, if * the call reverted with no returned reason, this function reverts with a * {FailedInnerCall} error. * * 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. */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0); } /** * @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`. */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { if (address(this).balance < value) { revert AddressInsufficientBalance(address(this)); } (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an * unsuccessful call. */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata ) internal view returns (bytes memory) { if (!success) { _revert(returndata); } else { // only check if target is a contract if the call was successful and the return data is empty // otherwise we already know that it was a contract if (returndata.length == 0 && target.code.length == 0) { revert AddressEmptyCode(target); } return returndata; } } /** * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the * revert reason or with a default {FailedInnerCall} error. */ function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) { if (!success) { _revert(returndata); } else { return returndata; } } /** * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}. */ function _revert(bytes memory returndata) 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 FailedInnerCall(); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol) pragma solidity ^0.8.20; /** * @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; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol) pragma solidity ^0.8.20; /** * @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 ReentrancyGuard { // 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; /** * @dev Unauthorized reentrant call. */ error ReentrancyGuardReentrantCall(); constructor() { _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 if (_status == ENTERED) { revert ReentrancyGuardReentrantCall(); } // 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; } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.24; interface ISnailEthereumTokenMigration { event TokensTransferred(bytes32 indexed messageId, uint256 amount); function transferTokens() external payable; function getTransferTokensFee() external view returns (uint256); function getTransferredTokensAmount(address holder) external view returns (uint256); function setDestinationReceiver(address receiver) external; }
{ "optimizer": { "enabled": true, "runs": 1000000 }, "evmVersion": "paris", "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"contract IERC20","name":"_tokenToTransfer","type":"address"},{"internalType":"contract IRouterClient","name":"_crossChainRouter","type":"address"},{"internalType":"uint64","name":"_destinationChain","type":"uint64"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"AddressEmptyCode","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"AddressInsufficientBalance","type":"error"},{"inputs":[],"name":"FailedInnerCall","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"OwnableInvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"OwnableUnauthorizedAccount","type":"error"},{"inputs":[],"name":"ReentrancyGuardReentrantCall","type":"error"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"SafeERC20FailedOperation","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferStarted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"messageId","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"TokensTransferred","type":"event"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"crossChainRouter","outputs":[{"internalType":"contract IRouterClient","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"destinationChain","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"destinationReceiver","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTransferTokensFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"holder","type":"address"}],"name":"getTransferredTokensAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"receiver","type":"address"}],"name":"setDestinationReceiver","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"tokenToTransfer","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"transferTokens","outputs":[],"stateMutability":"payable","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000006bc40d4099f9057b23af309c08d935b890d7adc000000000000000000000000080226fc0ee2b096224eeac085bb9a8cba1146f7d000000000000000000000000000000000000000000000000dda641cfe44aff82
-----Decoded View---------------
Arg [0] : _tokenToTransfer (address): 0x6Bc40d4099f9057b23aF309C08d935b890d7Adc0
Arg [1] : _crossChainRouter (address): 0x80226fc0Ee2b096224EeAc085Bb9a8cba1146f7D
Arg [2] : _destinationChain (uint64): 15971525489660198786
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000006bc40d4099f9057b23af309c08d935b890d7adc0
Arg [1] : 00000000000000000000000080226fc0ee2b096224eeac085bb9a8cba1146f7d
Arg [2] : 000000000000000000000000000000000000000000000000dda641cfe44aff82
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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.