OP Sepolia Testnet

Contract

0x3cac8D751E1A90328b0a52D7e194b418EEA22Ce7
Source Code Source Code

Overview

ETH Balance

0.38986704 ETH

More Info

Multichain Info

N/A
Transaction Hash
Method
Block
From
To
Amount
Lock205542412024-11-29 20:10:22382 days ago1732911022IN
0x3cac8D75...8EEA22Ce7
0.00947212 ETH0.0000003473470.00100025
Redeem205542412024-11-29 20:10:22382 days ago1732911022IN
0x3cac8D75...8EEA22Ce7
0 ETH0.0000001274910.00100025
Lock205541892024-11-29 20:08:38382 days ago1732910918IN
0x3cac8D75...8EEA22Ce7
0.00947212 ETH0.0000003475870.00100025
Redeem205541102024-11-29 20:06:00382 days ago1732910760IN
0x3cac8D75...8EEA22Ce7
0 ETH0.0000001283590.00100025
Lock205540742024-11-29 20:04:48382 days ago1732910688IN
0x3cac8D75...8EEA22Ce7
0.00947212 ETH0.0000003525210.00100025
Redeem205538682024-11-29 19:57:56382 days ago1732910276IN
0x3cac8D75...8EEA22Ce7
0 ETH0.0000001359920.00100025
Lock205538412024-11-29 19:57:02382 days ago1732910222IN
0x3cac8D75...8EEA22Ce7
0.00282207 ETH0.0000003582650.00100025
Redeem205520932024-11-29 18:58:46382 days ago1732906726IN
0x3cac8D75...8EEA22Ce7
0 ETH0.0000001241930.00100025
Lock205520712024-11-29 18:58:02382 days ago1732906682IN
0x3cac8D75...8EEA22Ce7
0.00083241 ETH0.0000004099140.00100025
Refund205510382024-11-29 18:23:36382 days ago1732904616IN
0x3cac8D75...8EEA22Ce7
0 ETH0.0000001208890.00100025
Lock205491092024-11-29 17:19:18382 days ago1732900758IN
0x3cac8D75...8EEA22Ce7
0.00083366 ETH0.000000428230.00100025
Redeem205460222024-11-29 15:36:24382 days ago1732894584IN
0x3cac8D75...8EEA22Ce7
0 ETH0.000000179970.00100025
Lock205460092024-11-29 15:35:58382 days ago1732894558IN
0x3cac8D75...8EEA22Ce7
0.00494717 ETH0.0000005237430.00100025
Redeem205421102024-11-29 13:26:00382 days ago1732886760IN
0x3cac8D75...8EEA22Ce7
0 ETH0.0000003081220.00100025
Lock205421002024-11-29 13:25:40382 days ago1732886740IN
0x3cac8D75...8EEA22Ce7
0.00092223 ETH0.000000806220.00100025
Redeem205382402024-11-29 11:17:00382 days ago1732879020IN
0x3cac8D75...8EEA22Ce7
0 ETH0.0000089429480.00100025
Lock205382082024-11-29 11:15:56382 days ago1732878956IN
0x3cac8D75...8EEA22Ce7
0.00083462 ETH0.0000218361940.00100025
Redeem205360152024-11-29 10:02:50382 days ago1732874570IN
0x3cac8D75...8EEA22Ce7
0 ETH0.0000121772290.00100025
Lock205360012024-11-29 10:02:22382 days ago1732874542IN
0x3cac8D75...8EEA22Ce7
0.00083518 ETH0.0000273923560.00100025
Redeem205349202024-11-29 9:26:20382 days ago1732872380IN
0x3cac8D75...8EEA22Ce7
0 ETH0.0000136047320.00100025
Add Lock205349082024-11-29 9:25:56382 days ago1732872356IN
0x3cac8D75...8EEA22Ce7
0 ETH0.0000169194390.00097995
Commit205348732024-11-29 9:24:46382 days ago1732872286IN
0x3cac8D75...8EEA22Ce7
0.00090978 ETH0.0000381955710.00097025
Redeem205328052024-11-29 8:15:50382 days ago1732868150IN
0x3cac8D75...8EEA22Ce7
0 ETH0.0000001120260.00100025
Lock205327922024-11-29 8:15:24382 days ago1732868124IN
0x3cac8D75...8EEA22Ce7
0.0008408 ETH0.000000372490.00100025
Redeem205326562024-11-29 8:10:52382 days ago1732867852IN
0x3cac8D75...8EEA22Ce7
0 ETH0.000000116420.00100025
View all transactions

Latest 25 internal transactions (View All)

Parent Transaction Hash Block From To Amount
205542412024-11-29 20:10:22382 days ago1732911022
0x3cac8D75...8EEA22Ce7
0.00947212 ETH
205541102024-11-29 20:06:00382 days ago1732910760
0x3cac8D75...8EEA22Ce7
0.00947212 ETH
205538682024-11-29 19:57:56382 days ago1732910276
0x3cac8D75...8EEA22Ce7
0.00282207 ETH
205520932024-11-29 18:58:46382 days ago1732906726
0x3cac8D75...8EEA22Ce7
0.00083241 ETH
205510382024-11-29 18:23:36382 days ago1732904616
0x3cac8D75...8EEA22Ce7
0.00083366 ETH
205460222024-11-29 15:36:24382 days ago1732894584
0x3cac8D75...8EEA22Ce7
0.00494717 ETH
205421102024-11-29 13:26:00382 days ago1732886760
0x3cac8D75...8EEA22Ce7
0.00092223 ETH
205382402024-11-29 11:17:00382 days ago1732879020
0x3cac8D75...8EEA22Ce7
0.00083462 ETH
205360152024-11-29 10:02:50382 days ago1732874570
0x3cac8D75...8EEA22Ce7
0.00083518 ETH
205349202024-11-29 9:26:20382 days ago1732872380
0x3cac8D75...8EEA22Ce7
0.00090978 ETH
205328052024-11-29 8:15:50382 days ago1732868150
0x3cac8D75...8EEA22Ce7
0.0008408 ETH
205326562024-11-29 8:10:52382 days ago1732867852
0x3cac8D75...8EEA22Ce7
0.00084328 ETH
205214312024-11-29 1:56:42382 days ago1732845402
0x3cac8D75...8EEA22Ce7
0.00091057 ETH
205203702024-11-29 1:21:20382 days ago1732843280
0x3cac8D75...8EEA22Ce7
0.00083912 ETH
205141302024-11-28 21:53:20382 days ago1732830800
0x3cac8D75...8EEA22Ce7
0.00092194 ETH
205046642024-11-28 16:37:48383 days ago1732811868
0x3cac8D75...8EEA22Ce7
0.00084234 ETH
205043142024-11-28 16:26:08383 days ago1732811168
0x3cac8D75...8EEA22Ce7
0.00084074 ETH
205024072024-11-28 15:22:34383 days ago1732807354
0x3cac8D75...8EEA22Ce7
0.00091144 ETH
204975532024-11-28 12:40:46383 days ago1732797646
0x3cac8D75...8EEA22Ce7
0.00091283 ETH
204964912024-11-28 12:05:22383 days ago1732795522
0x3cac8D75...8EEA22Ce7
0.00947242 ETH
204951682024-11-28 11:21:16383 days ago1732792876
0x3cac8D75...8EEA22Ce7
0.00083291 ETH
204930952024-11-28 10:12:10383 days ago1732788730
0x3cac8D75...8EEA22Ce7
0.00082831 ETH
204927722024-11-28 10:01:24383 days ago1732788084
0x3cac8D75...8EEA22Ce7
0.00089868 ETH
204903012024-11-28 8:39:02383 days ago1732783142
0x3cac8D75...8EEA22Ce7
0.00084872 ETH
204835752024-11-28 4:54:50383 days ago1732769690
0x3cac8D75...8EEA22Ce7
0.0008275 ETH
View All Internal Transactions
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Contract Source Code Verified (Exact Match)

Contract Name:
LayerswapV8

Compiler Version
v0.8.23+commit.f704f362

Optimization Enabled:
Yes with 200 runs

Other Settings:
paris EvmVersion

Contract Source Code (Solidity Standard Json-Input format)

/*
_                                                 __     _____ 
| |    __ _ _   _  ___ _ __ _____      ____ _ _ __ \ \   / ( _ )
| |   / _` | | | |/ _ \ '__/ __\ \ /\ / / _` | '_ \ \ \ / // _ \
| |__| (_| | |_| |  __/ |  \__ \\ V  V / (_| | |_) | \ V /| (_) |
|_____\__,_|\__, |\___|_|  |___/ \_/\_/ \__,_| .__/   \_/  \___/
            |___/                            |_|

*/

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;
import '@openzeppelin/contracts/utils/cryptography/ECDSA.sol';
import '@openzeppelin/contracts/utils/Address.sol';

// Domain separator ensures signatures are unique to this contract and chain, preventing replay attacks.
struct EIP712Domain {
  string name;
  string version;
  uint256 chainId;
  address verifyingContract;
  bytes32 salt;
}

contract LayerswapV8 {
  using ECDSA for bytes32;
  using Address for address;

  bytes32 private DOMAIN_SEPARATOR;
  bytes32 private constant SALT = keccak256(abi.encodePacked('Layerswap V8'));

  constructor() {
    DOMAIN_SEPARATOR = hashDomain(
      EIP712Domain({
        name: 'LayerswapV8',
        version: '1',
        chainId: block.chainid,
        verifyingContract: address(this),
        salt: SALT
      })
    );
  }

  // Structure for storing swap-related data
  struct HTLC {
    string dstAddress;
    string dstChain;
    string dstAsset;
    string srcAsset;
    address payable sender;
    address payable srcReceiver;
    bytes32 hashlock;
    uint256 timelock;
    uint256 amount;
    uint256 secret;
    bool redeemed;
    bool refunded;
  }

  struct addLockMsg {
    bytes32 Id;
    bytes32 hashlock;
    uint256 timelock;
  }

  event TokenCommitted(
    bytes32 indexed Id,
    string[] hopChains,
    string[] hopAssets,
    string[] hopAddresses,
    string dstChain,
    string dstAddress,
    string dstAsset,
    address indexed sender,
    address indexed srcReceiver,
    string srcAsset,
    uint256 amount,
    uint256 timelock
  );
  event TokenLocked(
    bytes32 indexed Id,
    bytes32 hashlock,
    string dstChain,
    string dstAddress,
    string dstAsset,
    address indexed sender,
    address indexed srcReceiver,
    string srcAsset,
    uint256 amount,
    uint256 timelock
  );

  event TokenRefunded(bytes32 indexed Id);
  event TokenRedeemed(bytes32 indexed Id, address redeemAddress);
  event LowLevelErrorOccurred(bytes lowLevelData);

  modifier _exists(bytes32 Id) {
    require(hasHTLC(Id),"HTLC Not Exists");
    _;
  }

  mapping(bytes32 => HTLC) contracts;
  bytes32[] contractIds;
  uint256 blockHashAsUint = uint256(blockhash(block.number - 1));
  uint256 contractNonce = 0;

  function commit(
    string[] memory hopChains,
    string[] memory hopAssets,
    string[] memory hopAddresses,
    string memory dstChain,
    string memory dstAsset,
    string memory dstAddress,
    string memory srcAsset,
    address srcReceiver,
    uint256 timelock
  ) external payable returns (bytes32 Id) {
    require(msg.value > 0,"Funds Not Sent");
    require(timelock > block.timestamp,"Not Future Timelock");
    contractNonce += 1;
    Id = bytes32(blockHashAsUint ^ contractNonce);

    //Remove this check; the ID is guaranteed to be unique.
    require(!hasHTLC(Id),"HTLC Already Exists");
    contractIds.push(Id);
    contracts[Id] = HTLC(
      dstAddress,
      dstChain,
      dstAsset,
      srcAsset,
      payable(msg.sender),
      payable(srcReceiver),
      bytes32(0),
      timelock,
      msg.value,
      uint256(0),
      false,
      false
    );

    emit TokenCommitted(
      Id,
      hopChains,
      hopAssets,
      hopAddresses,
      dstChain,
      dstAddress,
      dstAsset,
      msg.sender,
      srcReceiver,
      srcAsset,
      msg.value,
      timelock
    );
  }

  function refund(bytes32 Id) external _exists(Id) returns (bool) {
    HTLC storage htlc = contracts[Id];
    require(!htlc.refunded,"Already Refunded");
    require(!htlc.redeemed,"Already Redeemed");
    require(htlc.timelock <= block.timestamp,"Not Passed Timelock");

    htlc.refunded = true;
    (bool success, ) = htlc.sender.call{ value: htlc.amount }('');
    require(success, 'Transfer failed');
    emit TokenRefunded(Id);
    return true;
  }

  function addLock(bytes32 Id, bytes32 hashlock, uint256 timelock) external _exists(Id) returns (bytes32) {
    HTLC storage htlc = contracts[Id];
    require(!htlc.refunded,"Already Refunded");
    require(timelock > block.timestamp,"Not Future Timelock");
    if (msg.sender == htlc.sender || msg.sender == address(this)) {
      if (htlc.hashlock == 0) {
        htlc.hashlock = hashlock;
        htlc.timelock = timelock;
      } else {
        require(false,"Hashlock Already Set");
      }
      emit TokenLocked(
                        Id,
                        hashlock,
                        htlc.dstChain,
                        htlc.dstAddress,
                        htlc.dstAsset,
                        htlc.sender,
                        htlc.srcReceiver,
                        htlc.srcAsset,
                        htlc.amount,
                        timelock
                      );
      return Id;
    } else {
      require(false,"No Allowance"); 
    }
  }

  function addLockSig(addLockMsg memory message, uint8 v, bytes32 r, bytes32 s) external returns (bytes32) {
    if (verifyMessage(message, v, r, s)) {
      return this.addLock(message.Id, message.hashlock, message.timelock);
    } else {
      require(false,"Invalid Signiture");
    }
  }

  function lock(
    bytes32 Id,
    bytes32 hashlock,
    uint256 timelock,
    address payable srcReceiver,
    string memory srcAsset,
    string memory dstChain,
    string memory dstAddress,
    string memory dstAsset
  ) external payable returns (bytes32) {
    require(msg.value > 0, "Funds Not Sent");
    require(timelock > block.timestamp,"Not Future Timelock");
    require(!hasHTLC(Id),"HTLC Already Exists");
    contracts[Id] = HTLC(
      dstAddress,
      dstChain,
      dstAsset,
      srcAsset,
      payable(msg.sender),
      srcReceiver,
      hashlock,
      timelock,
      msg.value,
      uint256(0),
      false,
      false
    );
    contractIds.push(Id);
    emit TokenLocked(
      Id,
      hashlock,
      dstChain,
      dstAddress,
      dstAsset,
      msg.sender,
      srcReceiver,
      srcAsset,
      msg.value,
      timelock
    );
    return Id;
  }

  function redeem(bytes32 Id, uint256 secret) external _exists(Id) returns (bool) {
    HTLC storage htlc = contracts[Id];

    require(htlc.hashlock == sha256(abi.encodePacked(secret)),"Hashlock Not Match");
    require(!htlc.refunded,"Already Refunded");
    require(!htlc.redeemed,"Already Redeemed");

    htlc.secret = secret;
    htlc.redeemed = true;
    (bool success, ) = htlc.srcReceiver.call{ value: htlc.amount }('');
    require(success, 'Transfer failed');
    emit TokenRedeemed(Id, msg.sender);
    return true;
  }

  function getDetails(bytes32 Id) public view returns (HTLC memory) {
    return contracts[Id];
  }

  function getContracts(address senderAddr) public view returns (bytes32[] memory) {
    uint256 count = 0;

    for (uint256 i = 0; i < contractIds.length; i++) {
      HTLC memory htlc = contracts[contractIds[i]];
      if (htlc.sender == senderAddr) {
        count++;
      }
    }

    bytes32[] memory result = new bytes32[](count);
    uint256 j = 0;

    for (uint256 i = 0; i < contractIds.length; i++) {
      if (contracts[contractIds[i]].sender == senderAddr) {
        result[j] = contractIds[i];
        j++;
      }
    }

    return result;
  }

  function hashDomain(EIP712Domain memory domain) private pure returns (bytes32) {
    return
      keccak256(
        abi.encode(
          keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract,bytes32 salt)'),
          keccak256(bytes(domain.name)),
          keccak256(bytes(domain.version)),
          domain.chainId,
          domain.verifyingContract,
          domain.salt
        )
      );
  }

  // Hashes an EIP712 message struct
  function hashMessage(addLockMsg memory message) private pure returns (bytes32) {
    return
      keccak256(
        abi.encode(
          keccak256('addLockMsg(bytes32 Id,bytes32 hashlock,uint256 timelock)'),
          message.Id,
          message.hashlock,
          message.timelock
        )
      );
  }

  // Verifies an EIP712 message signature
  function verifyMessage(addLockMsg memory message, uint8 v, bytes32 r, bytes32 s) private view returns (bool) {
    bytes32 digest = keccak256(abi.encodePacked('\x19\x01', DOMAIN_SEPARATOR, hashMessage(message)));

    address recoveredAddress = ecrecover(digest, v, r, s);

    return (recoveredAddress == contracts[message.Id].sender);
  }

  function hasHTLC(bytes32 Id) internal view returns (bool exists) {
    exists = (contracts[Id].sender != address(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 v5.0.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.20;

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS
    }

    /**
     * @dev The signature derives the `address(0)`.
     */
    error ECDSAInvalidSignature();

    /**
     * @dev The signature has an invalid length.
     */
    error ECDSAInvalidSignatureLength(uint256 length);

    /**
     * @dev The signature has an S value that is in the upper half order.
     */
    error ECDSAInvalidSignatureS(bytes32 s);

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with `signature` or an error. This will not
     * return address(0) without also returning an error description. Errors are documented using an enum (error type)
     * and a bytes32 providing additional information about the error.
     *
     * If no error is returned, then the address can be used for verification purposes.
     *
     * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError, bytes32) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength, bytes32(signature.length));
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, signature);
        _throwError(error, errorArg);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     */
    function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError, bytes32) {
        unchecked {
            bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
            // We do not check for an overflow here since the shift operation results in 0 or 1.
            uint8 v = uint8((uint256(vs) >> 255) + 27);
            return tryRecover(hash, v, r, s);
        }
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     */
    function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
        (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, r, vs);
        _throwError(error, errorArg);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError, bytes32) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS, s);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature, bytes32(0));
        }

        return (signer, RecoverError.NoError, bytes32(0));
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
        (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, v, r, s);
        _throwError(error, errorArg);
        return recovered;
    }

    /**
     * @dev Optionally reverts with the corresponding custom error according to the `error` argument provided.
     */
    function _throwError(RecoverError error, bytes32 errorArg) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert ECDSAInvalidSignature();
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert ECDSAInvalidSignatureLength(uint256(errorArg));
        } else if (error == RecoverError.InvalidSignatureS) {
            revert ECDSAInvalidSignatureS(errorArg);
        }
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "viaIR": true,
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract ABI

API
[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes","name":"lowLevelData","type":"bytes"}],"name":"LowLevelErrorOccurred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"Id","type":"bytes32"},{"indexed":false,"internalType":"string[]","name":"hopChains","type":"string[]"},{"indexed":false,"internalType":"string[]","name":"hopAssets","type":"string[]"},{"indexed":false,"internalType":"string[]","name":"hopAddresses","type":"string[]"},{"indexed":false,"internalType":"string","name":"dstChain","type":"string"},{"indexed":false,"internalType":"string","name":"dstAddress","type":"string"},{"indexed":false,"internalType":"string","name":"dstAsset","type":"string"},{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"address","name":"srcReceiver","type":"address"},{"indexed":false,"internalType":"string","name":"srcAsset","type":"string"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"timelock","type":"uint256"}],"name":"TokenCommitted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"Id","type":"bytes32"},{"indexed":false,"internalType":"bytes32","name":"hashlock","type":"bytes32"},{"indexed":false,"internalType":"string","name":"dstChain","type":"string"},{"indexed":false,"internalType":"string","name":"dstAddress","type":"string"},{"indexed":false,"internalType":"string","name":"dstAsset","type":"string"},{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"address","name":"srcReceiver","type":"address"},{"indexed":false,"internalType":"string","name":"srcAsset","type":"string"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"timelock","type":"uint256"}],"name":"TokenLocked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"Id","type":"bytes32"},{"indexed":false,"internalType":"address","name":"redeemAddress","type":"address"}],"name":"TokenRedeemed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"Id","type":"bytes32"}],"name":"TokenRefunded","type":"event"},{"inputs":[{"internalType":"bytes32","name":"Id","type":"bytes32"},{"internalType":"bytes32","name":"hashlock","type":"bytes32"},{"internalType":"uint256","name":"timelock","type":"uint256"}],"name":"addLock","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"Id","type":"bytes32"},{"internalType":"bytes32","name":"hashlock","type":"bytes32"},{"internalType":"uint256","name":"timelock","type":"uint256"}],"internalType":"struct LayerswapV8.addLockMsg","name":"message","type":"tuple"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"addLockSig","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string[]","name":"hopChains","type":"string[]"},{"internalType":"string[]","name":"hopAssets","type":"string[]"},{"internalType":"string[]","name":"hopAddresses","type":"string[]"},{"internalType":"string","name":"dstChain","type":"string"},{"internalType":"string","name":"dstAsset","type":"string"},{"internalType":"string","name":"dstAddress","type":"string"},{"internalType":"string","name":"srcAsset","type":"string"},{"internalType":"address","name":"srcReceiver","type":"address"},{"internalType":"uint256","name":"timelock","type":"uint256"}],"name":"commit","outputs":[{"internalType":"bytes32","name":"Id","type":"bytes32"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"senderAddr","type":"address"}],"name":"getContracts","outputs":[{"internalType":"bytes32[]","name":"","type":"bytes32[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"Id","type":"bytes32"}],"name":"getDetails","outputs":[{"components":[{"internalType":"string","name":"dstAddress","type":"string"},{"internalType":"string","name":"dstChain","type":"string"},{"internalType":"string","name":"dstAsset","type":"string"},{"internalType":"string","name":"srcAsset","type":"string"},{"internalType":"address payable","name":"sender","type":"address"},{"internalType":"address payable","name":"srcReceiver","type":"address"},{"internalType":"bytes32","name":"hashlock","type":"bytes32"},{"internalType":"uint256","name":"timelock","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"secret","type":"uint256"},{"internalType":"bool","name":"redeemed","type":"bool"},{"internalType":"bool","name":"refunded","type":"bool"}],"internalType":"struct LayerswapV8.HTLC","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"Id","type":"bytes32"},{"internalType":"bytes32","name":"hashlock","type":"bytes32"},{"internalType":"uint256","name":"timelock","type":"uint256"},{"internalType":"address payable","name":"srcReceiver","type":"address"},{"internalType":"string","name":"srcAsset","type":"string"},{"internalType":"string","name":"dstChain","type":"string"},{"internalType":"string","name":"dstAddress","type":"string"},{"internalType":"string","name":"dstAsset","type":"string"}],"name":"lock","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"Id","type":"bytes32"},{"internalType":"uint256","name":"secret","type":"uint256"}],"name":"redeem","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"Id","type":"bytes32"}],"name":"refund","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

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Transaction Hash Block Value Eth2 PubKey Valid
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0x3cac8D751E1A90328b0a52D7e194b418EEA22Ce7
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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.