ETH Price: $3,800.91 (-1.21%)

Contract

0xe4747A26b941EbDbC7Ef67de7580f700E3DBf6D5
 

Overview

ETH Balance

0.096150169290282288 ETH

Eth Value

$365.46 (@ $3,800.91/ETH)
Transaction Hash
Method
Block
From
To
Fulfill164210592023-01-16 18:11:23689 days ago1673892683IN
0xe4747A26...0E3DBf6D5
0 ETH0.0021503936.06288506
Prepare164141862023-01-15 19:07:59690 days ago1673809679IN
0xe4747A26...0E3DBf6D5
0 ETH0.0025001435.11294564
Prepare164139272023-01-15 18:15:59690 days ago1673806559IN
0xe4747A26...0E3DBf6D5
0 ETH0.003601928.16606494
Fulfill164121312023-01-15 12:13:59690 days ago1673784839IN
0xe4747A26...0E3DBf6D5
0 ETH0.0014285218.16745688
Prepare164052182023-01-14 13:03:23691 days ago1673701403IN
0xe4747A26...0E3DBf6D5
0 ETH0.0014466720.31762471
Prepare163913182023-01-12 14:27:47693 days ago1673533667IN
0xe4747A26...0E3DBf6D5
0 ETH0.0022660624.58539793
Fulfill163889312023-01-12 6:27:59693 days ago1673504879IN
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0 ETH0.001644620.94101551
Fulfill163844682023-01-11 15:28:35694 days ago1673450915IN
0xe4747A26...0E3DBf6D5
0 ETH0.0018321123.32358832
Fulfill163358262023-01-04 20:30:23700 days ago1672864223IN
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0 ETH0.0017380122.13378827
Prepare163297592023-01-04 0:11:47701 days ago1672791107IN
0xe4747A26...0E3DBf6D5
0 ETH0.0015498521.77398892
Cancel163175622023-01-02 7:21:35703 days ago1672644095IN
0xe4747A26...0E3DBf6D5
0 ETH0.0009781816.86939945
Fulfill162966842022-12-30 9:26:47706 days ago1672392407IN
0xe4747A26...0E3DBf6D5
0 ETH0.0013869917.65428836
Prepare162961312022-12-30 7:35:23706 days ago1672385723IN
0xe4747A26...0E3DBf6D5
0 ETH0.001671718.12760004
Fulfill162924652022-12-29 19:20:47707 days ago1672341647IN
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0 ETH0.0021570727.45799797
Prepare162513382022-12-24 1:33:47712 days ago1671845627IN
0xe4747A26...0E3DBf6D5
0 ETH0.0021873614.69755166
Prepare162431222022-12-22 22:06:11713 days ago1671746771IN
0xe4747A26...0E3DBf6D5
0 ETH0.0018572826.09315144
Fulfill162367162022-12-22 0:40:35714 days ago1671669635IN
0xe4747A26...0E3DBf6D5
0 ETH0.0018108716.54841186
Prepare162281682022-12-20 20:02:59716 days ago1671566579IN
0xe4747A26...0E3DBf6D5
0 ETH0.0020208625.53536279
Prepare162281112022-12-20 19:51:23716 days ago1671565883IN
0xe4747A26...0E3DBf6D5
0 ETH0.001831423.14134724
Fulfill162276212022-12-20 18:12:59716 days ago1671559979IN
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0 ETH0.0034165457.08994733
Prepare162186782022-12-19 12:15:47717 days ago1671452147IN
0xe4747A26...0E3DBf6D5
0 ETH0.0022693915.24999486
Prepare162052652022-12-17 15:18:59719 days ago1671290339IN
0xe4747A26...0E3DBf6D5
0 ETH0.0015941417.29103179
Fulfill162049922022-12-17 14:23:59719 days ago1671287039IN
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0 ETH0.0017764316.21972144
Prepare162007242022-12-17 0:06:23719 days ago1671235583IN
0xe4747A26...0E3DBf6D5
0 ETH0.0024107326.14679507
Prepare161618992022-12-11 13:54:59725 days ago1670766899IN
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0 ETH0.0017230818.69097909
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Latest 25 internal transactions (View All)

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Parent Transaction Hash Block From To
164275892023-01-17 16:02:47688 days ago1673971367
0xe4747A26...0E3DBf6D5
0.01247839 ETH
164272162023-01-17 14:47:35688 days ago1673966855
0xe4747A26...0E3DBf6D5
0.0089098 ETH
164271172023-01-17 14:27:47688 days ago1673965667
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0.00864416 ETH
164265672023-01-17 12:37:47688 days ago1673959067
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0.00425676 ETH
164245902023-01-17 6:01:23688 days ago1673935283
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0.00438814 ETH
164230652023-01-17 0:54:59688 days ago1673916899
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0.00715314 ETH
164228102023-01-17 0:03:23688 days ago1673913803
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0.00463089 ETH
164210592023-01-16 18:11:23689 days ago1673892683
0xe4747A26...0E3DBf6D5
0.00591636 ETH
164205412023-01-16 16:27:23689 days ago1673886443
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0.00545748 ETH
164203192023-01-16 15:42:47689 days ago1673883767
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0.00422118 ETH
164200022023-01-16 14:39:11689 days ago1673879951
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0.00463089 ETH
164194862023-01-16 12:55:59689 days ago1673873759
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0.00422118 ETH
164179692023-01-16 7:50:59689 days ago1673855459
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0.00503597 ETH
164142272023-01-15 19:16:11690 days ago1673810171
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0.00472196 ETH
164141862023-01-15 19:07:59690 days ago1673809679
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0.00532789 ETH
164140912023-01-15 18:48:59690 days ago1673808539
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0.00436679 ETH
164121312023-01-15 12:13:59690 days ago1673784839
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0.00364016 ETH
164121312023-01-15 12:13:59690 days ago1673784839
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0.00364016 ETH
164120792023-01-15 12:03:35690 days ago1673784215
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0.00379957 ETH
164095392023-01-15 3:31:35690 days ago1673753495
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0.00433274 ETH
164081102023-01-14 22:44:23690 days ago1673736263
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0.00353663 ETH
164072662023-01-14 19:54:23691 days ago1673726063
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0.00416789 ETH
164061962023-01-14 16:19:59691 days ago1673713199
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0.00557775 ETH
164060842023-01-14 15:57:35691 days ago1673711855
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0.0046642 ETH
164058372023-01-14 15:07:47691 days ago1673708867
0xe4747A26...0E3DBf6D5
0.00671605 ETH
View All Internal Transactions
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x6Db8506a...13CE97a5d
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
Router

Compiler Version
v0.8.4+commit.c7e474f2

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 9 : Router.sol
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.4;

import "./interfaces/ITransactionManager.sol";
import "./lib/LibAsset.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";

contract Router is Ownable {
  address public immutable routerFactory;

  ITransactionManager public transactionManager;

  uint256 private chainId;

  address public recipient;

  address public routerSigner;

  struct SignedPrepareData {
    ITransactionManager.PrepareArgs args;
    address routerRelayerFeeAsset;
    uint256 routerRelayerFee;
    uint256 chainId; // For domain separation
  }

  struct SignedFulfillData {
    ITransactionManager.FulfillArgs args;
    address routerRelayerFeeAsset;
    uint256 routerRelayerFee;
    uint256 chainId; // For domain separation
  }

  struct SignedCancelData {
    ITransactionManager.CancelArgs args;
    address routerRelayerFeeAsset;
    uint256 routerRelayerFee;
    uint256 chainId; // For domain separation
  }

  struct SignedRemoveLiquidityData {
    uint256 amount;
    address assetId;
    address routerRelayerFeeAsset;
    uint256 routerRelayerFee;
    uint256 chainId; // For domain separation
  }

  event RelayerFeeAdded(address assetId, uint256 amount, address caller);
  event RelayerFeeRemoved(address assetId, uint256 amount, address caller);
  event RemoveLiquidity(
    uint256 amount, 
    address assetId,
    address routerRelayerFeeAsset,
    uint256 routerRelayerFee, 
    address caller
  );
  event Prepare(
    ITransactionManager.InvariantTransactionData invariantData,
    address routerRelayerFeeAsset,
    uint256 routerRelayerFee,
    address caller
  );
  event Fulfill(
    ITransactionManager.TransactionData txData,
    address routerRelayerFeeAsset,
    uint256 routerRelayerFee,
    address caller
  );
  event Cancel(
    ITransactionManager.TransactionData txData,
    address routerRelayerFeeAsset,
    uint256 routerRelayerFee,
    address caller
  );

  constructor(address _routerFactory) {
    routerFactory = _routerFactory;
  }

  // Prevents from calling methods other than routerFactory contract
  modifier onlyViaFactory() {
    require(msg.sender == routerFactory, "ONLY_VIA_FACTORY");
    _;
  }

  function init(
    address _transactionManager,
    uint256 _chainId,
    address _routerSigner,
    address _recipient,
    address _owner
  ) external onlyViaFactory {
    transactionManager = ITransactionManager(_transactionManager);
    chainId = _chainId;
    routerSigner = _routerSigner;
    recipient = _recipient;
    transferOwnership(_owner);
  }

  function setRecipient(address _recipient) external onlyOwner {
    recipient = _recipient;
  }

  function setSigner(address _routerSigner) external onlyOwner {
    routerSigner = _routerSigner;
  }

  function addRelayerFee(uint256 amount, address assetId) external payable {
    // Sanity check: nonzero amounts
    require(amount > 0, "#RC_ARF:002");

    // Transfer funds to contract
    // Validate correct amounts are transferred
    if (LibAsset.isNativeAsset(assetId)) {
      require(msg.value == amount, "#RC_ARF:005");
    } else {
      require(msg.value == 0, "#RC_ARF:006");
      LibAsset.transferFromERC20(assetId, msg.sender, address(this), amount);
    }

    // Emit event
    emit RelayerFeeAdded(assetId, amount, msg.sender);
  }

  function removeRelayerFee(uint256 amount, address assetId) external onlyOwner {
    // Sanity check: nonzero amounts
    require(amount > 0, "#RC_RRF:002");

    // Transfer funds from contract
    LibAsset.transferAsset(assetId, payable(recipient), amount);

    // Emit event
    emit RelayerFeeRemoved(assetId, amount, msg.sender);
  }

  function removeLiquidity(
    uint256 amount,
    address assetId,
    address routerRelayerFeeAsset,
    uint256 routerRelayerFee,
    bytes calldata signature
  ) external {
    if (msg.sender != routerSigner) {
      SignedRemoveLiquidityData memory payload = SignedRemoveLiquidityData({
        amount: amount,
        assetId: assetId,
        routerRelayerFeeAsset: routerRelayerFeeAsset,
        routerRelayerFee: routerRelayerFee,
        chainId: chainId
      });

      address recovered = recoverSignature(abi.encode(payload), signature);
      require(recovered == routerSigner, "#RC_RL:040");

      // Send the relayer the fee
      if (routerRelayerFee > 0) {
        LibAsset.transferAsset(routerRelayerFeeAsset, payable(msg.sender), routerRelayerFee);
      }
    }

    emit RemoveLiquidity(amount, assetId, routerRelayerFeeAsset, routerRelayerFee, msg.sender);
    return transactionManager.removeLiquidity(amount, assetId, payable(recipient));
  }

  function prepare(
    ITransactionManager.PrepareArgs calldata args,
    address routerRelayerFeeAsset,
    uint256 routerRelayerFee,
    bytes calldata signature
  ) external payable returns (ITransactionManager.TransactionData memory) {
    if (msg.sender != routerSigner) {
      SignedPrepareData memory payload = SignedPrepareData({
        args: args,
        routerRelayerFeeAsset: routerRelayerFeeAsset,
        routerRelayerFee: routerRelayerFee,
        chainId: chainId
      });

      address recovered = recoverSignature(abi.encode(payload), signature);
      require(recovered == routerSigner, "#RC_P:040");

      // Send the relayer the fee
      if (routerRelayerFee > 0) {
        LibAsset.transferAsset(routerRelayerFeeAsset, payable(msg.sender), routerRelayerFee);
      }
    }

    emit Prepare(args.invariantData, routerRelayerFeeAsset, routerRelayerFee, msg.sender);
    return transactionManager.prepare(args);
  }

  function fulfill(
    ITransactionManager.FulfillArgs calldata args,
    address routerRelayerFeeAsset,
    uint256 routerRelayerFee,
    bytes calldata signature
  ) external returns (ITransactionManager.TransactionData memory) {
    if (msg.sender != routerSigner) {
      SignedFulfillData memory payload = SignedFulfillData({
        args: args,
        routerRelayerFeeAsset: routerRelayerFeeAsset,
        routerRelayerFee: routerRelayerFee,
        chainId: chainId
      });

      address recovered = recoverSignature(abi.encode(payload), signature);
      require(recovered == routerSigner, "#RC_F:040");

      // Send the relayer the fee
      if (routerRelayerFee > 0) {
        LibAsset.transferAsset(routerRelayerFeeAsset, payable(msg.sender), routerRelayerFee);
      }
    }
    emit Fulfill(args.txData, routerRelayerFeeAsset, routerRelayerFee, msg.sender);
    return transactionManager.fulfill(args);
  }

  function cancel(
    ITransactionManager.CancelArgs calldata args,
    address routerRelayerFeeAsset,
    uint256 routerRelayerFee,
    bytes calldata signature
  ) external returns (ITransactionManager.TransactionData memory) {
    if (msg.sender != routerSigner) {
      SignedCancelData memory payload = SignedCancelData({
        args: args,
        routerRelayerFeeAsset: routerRelayerFeeAsset,
        routerRelayerFee: routerRelayerFee,
        chainId: chainId
      });

      address recovered = recoverSignature(abi.encode(payload), signature);
      require(recovered == routerSigner, "#RC_C:040");

      // Send the relayer the fee
      if (routerRelayerFee > 0) {
        LibAsset.transferAsset(routerRelayerFeeAsset, payable(msg.sender), routerRelayerFee);
      }
    }
    emit Cancel(args.txData, routerRelayerFeeAsset, routerRelayerFee, msg.sender);
    return transactionManager.cancel(args);
  }

  /**
   * @notice Holds the logic to recover the routerSigner from an encoded payload.
   *         Will hash and convert to an eth signed message.
   * @param encodedPayload The payload that was signed
   * @param signature The signature you are recovering the routerSigner from
   */
  function recoverSignature(bytes memory encodedPayload, bytes calldata signature) internal pure returns (address) {
    // Recover
    return ECDSA.recover(ECDSA.toEthSignedMessageHash(keccak256(encodedPayload)), signature);
  }

  receive() external payable {}
}

File 2 of 9 : ITransactionManager.sol
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.4;

interface ITransactionManager {
  // Structs

  // Holds all data that is constant between sending and
  // receiving chains. The hash of this is what gets signed
  // to ensure the signature can be used on both chains.
  struct InvariantTransactionData {
    address receivingChainTxManagerAddress;
    address user;
    address router;
    address initiator; // msg.sender of sending side
    address sendingAssetId;
    address receivingAssetId;
    address sendingChainFallback; // funds sent here on cancel
    address receivingAddress;
    address callTo;
    uint256 sendingChainId;
    uint256 receivingChainId;
    bytes32 callDataHash; // hashed to prevent free option
    bytes32 transactionId;
  }

  // Holds all data that varies between sending and receiving
  // chains. The hash of this is stored onchain to ensure the
  // information passed in is valid.
  struct VariantTransactionData {
    uint256 amount;
    uint256 expiry;
    uint256 preparedBlockNumber;
  }

  // All Transaction data, constant and variable
  struct TransactionData {
    address receivingChainTxManagerAddress;
    address user;
    address router;
    address initiator; // msg.sender of sending side
    address sendingAssetId;
    address receivingAssetId;
    address sendingChainFallback;
    address receivingAddress;
    address callTo;
    bytes32 callDataHash;
    bytes32 transactionId;
    uint256 sendingChainId;
    uint256 receivingChainId;
    uint256 amount;
    uint256 expiry;
    uint256 preparedBlockNumber; // Needed for removal of active blocks on fulfill/cancel
  }

  // The structure of the signed data for fulfill
  struct SignedFulfillData {
    bytes32 transactionId;
    uint256 relayerFee;
    string functionIdentifier; // "fulfill" or "cancel"
    uint256 receivingChainId; // For domain separation
    address receivingChainTxManagerAddress; // For domain separation
  }

  // The structure of the signed data for cancellation
  struct SignedCancelData {
    bytes32 transactionId;
    string functionIdentifier;
    uint256 receivingChainId;
    address receivingChainTxManagerAddress; // For domain separation
  }

  /**
    * Arguments for calling prepare()
    * @param invariantData The data for a crosschain transaction that will
    *                      not change between sending and receiving chains.
    *                      The hash of this data is used as the key to store 
    *                      the inforamtion that does change between chains 
    *                      (amount,expiry,preparedBlock) for verification
    * @param amount The amount of the transaction on this chain
    * @param expiry The block.timestamp when the transaction will no longer be
    *               fulfillable and is freely cancellable on this chain
    * @param encryptedCallData The calldata to be executed when the tx is
    *                          fulfilled. Used in the function to allow the user
    *                          to reconstruct the tx from events. Hash is stored
    *                          onchain to prevent shenanigans.
    * @param encodedBid The encoded bid that was accepted by the user for this
    *                   crosschain transfer. It is supplied as a param to the
    *                   function but is only used in event emission
    * @param bidSignature The signature of the bidder on the encoded bid for
    *                     this transaction. Only used within the function for
    *                     event emission. The validity of the bid and
    *                     bidSignature are enforced offchain
    * @param encodedMeta The meta for the function
    */
  struct PrepareArgs {
    InvariantTransactionData invariantData;
    uint256 amount;
    uint256 expiry;
    bytes encryptedCallData;
    bytes encodedBid;
    bytes bidSignature;
    bytes encodedMeta;
  }

  /**
    * @param txData All of the data (invariant and variant) for a crosschain
    *               transaction. The variant data provided is checked against
    *               what was stored when the `prepare` function was called.
    * @param relayerFee The fee that should go to the relayer when they are
    *                   calling the function on the receiving chain for the user
    * @param signature The users signature on the transaction id + fee that
    *                  can be used by the router to unlock the transaction on 
    *                  the sending chain
    * @param callData The calldata to be sent to and executed by the 
    *                 `FulfillHelper`
    * @param encodedMeta The meta for the function
    */
  struct FulfillArgs {
    TransactionData txData;
    uint256 relayerFee;
    bytes signature;
    bytes callData;
    bytes encodedMeta;
  }

  /**
    * Arguments for calling cancel()
    * @param txData All of the data (invariant and variant) for a crosschain
    *               transaction. The variant data provided is checked against
    *               what was stored when the `prepare` function was called.
    * @param signature The user's signature that allows a transaction to be
    *                  cancelled by a relayer
    * @param encodedMeta The meta for the function
    */
  struct CancelArgs {
    TransactionData txData;
    bytes signature;
    bytes encodedMeta;
  }

  // Adding/removing asset events
  event RouterAdded(address indexed addedRouter, address indexed caller);

  event RouterRemoved(address indexed removedRouter, address indexed caller);

  // Adding/removing router events
  event AssetAdded(address indexed addedAssetId, address indexed caller);

  event AssetRemoved(address indexed removedAssetId, address indexed caller);

  // Liquidity events
  event LiquidityAdded(address indexed router, address indexed assetId, uint256 amount, address caller);

  event LiquidityRemoved(address indexed router, address indexed assetId, uint256 amount, address recipient);

  // Transaction events
  event TransactionPrepared(
    address indexed user,
    address indexed router,
    bytes32 indexed transactionId,
    TransactionData txData,
    address caller,
    PrepareArgs args
  );

  event TransactionFulfilled(
    address indexed user,
    address indexed router,
    bytes32 indexed transactionId,
    FulfillArgs args,
    bool success,
    bool isContract,
    bytes returnData,
    address caller
  );

  event TransactionCancelled(
    address indexed user,
    address indexed router,
    bytes32 indexed transactionId,
    CancelArgs args,
    address caller
  );

  // Getters
  function getChainId() external view returns (uint256);

  function getStoredChainId() external view returns (uint256);

  // Owner only methods
  function addRouter(address router) external;

  function removeRouter(address router) external;

  function addAssetId(address assetId) external;

  function removeAssetId(address assetId) external;

  // Router only methods
  function addLiquidityFor(uint256 amount, address assetId, address router) external payable;

  function addLiquidity(uint256 amount, address assetId) external payable;

  function removeLiquidity(
    uint256 amount,
    address assetId,
    address payable recipient
  ) external;

  // Methods for crosschain transfers
  // called in the following order (in happy case)
  // 1. prepare by user on sending chain
  // 2. prepare by router on receiving chain
  // 3. fulfill by user on receiving chain
  // 4. fulfill by router on sending chain
  function prepare(
    PrepareArgs calldata args
  ) external payable returns (TransactionData memory);

  function fulfill(
    FulfillArgs calldata args
  ) external returns (TransactionData memory);

  function cancel(CancelArgs calldata args) external returns (TransactionData memory);
}

File 3 of 9 : LibAsset.sol
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.4;

import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";


/**
* @title LibAsset
* @author Connext <[email protected]>
* @notice This library contains helpers for dealing with onchain transfers
*         of assets, including accounting for the native asset `assetId`
*         conventions and any noncompliant ERC20 transfers
*/
library LibAsset {
  /** 
  * @dev All native assets use the empty address for their asset id
  *      by convention
  */
  address constant NATIVE_ASSETID = address(0);

  /** 
  * @notice Determines whether the given assetId is the native asset
  * @param assetId The asset identifier to evaluate
  * @return Boolean indicating if the asset is the native asset
  */
  function isNativeAsset(address assetId) internal pure returns (bool) {
    return assetId == NATIVE_ASSETID;
  }

  /** 
  * @notice Gets the balance of the inheriting contract for the given asset
  * @param assetId The asset identifier to get the balance of
  * @return Balance held by contracts using this library
  */
  function getOwnBalance(address assetId) internal view returns (uint256) {
    return
      isNativeAsset(assetId)
        ? address(this).balance
        : IERC20(assetId).balanceOf(address(this));
  }

  /** 
  * @notice Transfers ether from the inheriting contract to a given
  *         recipient
  * @param recipient Address to send ether to
  * @param amount Amount to send to given recipient
  */
  function transferNativeAsset(address payable recipient, uint256 amount)
      internal
  {
    Address.sendValue(recipient, amount);
  }

  /** 
  * @notice Transfers tokens from the inheriting contract to a given
  *         recipient
  * @param assetId Token address to transfer
  * @param recipient Address to send ether to
  * @param amount Amount to send to given recipient
  */
  function transferERC20(
      address assetId,
      address recipient,
      uint256 amount
  ) internal {
    SafeERC20.safeTransfer(IERC20(assetId), recipient, amount);
  }

  /** 
  * @notice Transfers tokens from a sender to a given recipient
  * @param assetId Token address to transfer
  * @param from Address of sender/owner
  * @param to Address of recipient/spender
  * @param amount Amount to transfer from owner to spender
  */
  function transferFromERC20(
    address assetId,
    address from,
    address to,
    uint256 amount
  ) internal {
    SafeERC20.safeTransferFrom(IERC20(assetId), from, to, amount);
  }

  /** 
  * @notice Increases the allowance of a token to a spender
  * @param assetId Token address of asset to increase allowance of
  * @param spender Account whos allowance is increased
  * @param amount Amount to increase allowance by
  */
  function increaseERC20Allowance(
    address assetId,
    address spender,
    uint256 amount
  ) internal {
    require(!isNativeAsset(assetId), "#IA:034");
    SafeERC20.safeIncreaseAllowance(IERC20(assetId), spender, amount);
  }

  /**
  * @notice Decreases the allowance of a token to a spender
  * @param assetId Token address of asset to decrease allowance of
  * @param spender Account whos allowance is decreased
  * @param amount Amount to decrease allowance by
  */
  function decreaseERC20Allowance(
    address assetId,
    address spender,
    uint256 amount
  ) internal {
    require(!isNativeAsset(assetId), "#DA:034");
    SafeERC20.safeDecreaseAllowance(IERC20(assetId), spender, amount);
  }

  /**
  * @notice Wrapper function to transfer a given asset (native or erc20) to
  *         some recipient. Should handle all non-compliant return value
  *         tokens as well by using the SafeERC20 contract by open zeppelin.
  * @param assetId Asset id for transfer (address(0) for native asset, 
  *                token address for erc20s)
  * @param recipient Address to send asset to
  * @param amount Amount to send to given recipient
  */
  function transferAsset(
      address assetId,
      address payable recipient,
      uint256 amount
  ) internal {
    isNativeAsset(assetId)
      ? transferNativeAsset(recipient, amount)
      : transferERC20(assetId, recipient, amount);
  }
}

File 4 of 9 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _setOwner(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 5 of 9 : ECDSA.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @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 {
    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode 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 {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 recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        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.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return recover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return recover(hash, r, vs);
        } else {
            revert("ECDSA: invalid signature length");
        }
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        bytes32 s;
        uint8 v;
        assembly {
            s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
            v := add(shr(255, vs), 27)
        }
        return recover(hash, v, r, s);
    }

    /**
     * @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) {
        // 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 (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): 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.
        require(
            uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0,
            "ECDSA: invalid signature 's' value"
        );
        require(v == 27 || v == 28, "ECDSA: invalid signature 'v' value");

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        require(signer != address(0), "ECDSA: invalid signature");

        return signer;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

File 6 of 9 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 7 of 9 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) private pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 8 of 9 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

File 9 of 9 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

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

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"_routerFactory","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"components":[{"internalType":"address","name":"receivingChainTxManagerAddress","type":"address"},{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"router","type":"address"},{"internalType":"address","name":"initiator","type":"address"},{"internalType":"address","name":"sendingAssetId","type":"address"},{"internalType":"address","name":"receivingAssetId","type":"address"},{"internalType":"address","name":"sendingChainFallback","type":"address"},{"internalType":"address","name":"receivingAddress","type":"address"},{"internalType":"address","name":"callTo","type":"address"},{"internalType":"bytes32","name":"callDataHash","type":"bytes32"},{"internalType":"bytes32","name":"transactionId","type":"bytes32"},{"internalType":"uint256","name":"sendingChainId","type":"uint256"},{"internalType":"uint256","name":"receivingChainId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint256","name":"preparedBlockNumber","type":"uint256"}],"indexed":false,"internalType":"struct ITransactionManager.TransactionData","name":"txData","type":"tuple"},{"indexed":false,"internalType":"address","name":"routerRelayerFeeAsset","type":"address"},{"indexed":false,"internalType":"uint256","name":"routerRelayerFee","type":"uint256"},{"indexed":false,"internalType":"address","name":"caller","type":"address"}],"name":"Cancel","type":"event"},{"anonymous":false,"inputs":[{"components":[{"internalType":"address","name":"receivingChainTxManagerAddress","type":"address"},{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"router","type":"address"},{"internalType":"address","name":"initiator","type":"address"},{"internalType":"address","name":"sendingAssetId","type":"address"},{"internalType":"address","name":"receivingAssetId","type":"address"},{"internalType":"address","name":"sendingChainFallback","type":"address"},{"internalType":"address","name":"receivingAddress","type":"address"},{"internalType":"address","name":"callTo","type":"address"},{"internalType":"bytes32","name":"callDataHash","type":"bytes32"},{"internalType":"bytes32","name":"transactionId","type":"bytes32"},{"internalType":"uint256","name":"sendingChainId","type":"uint256"},{"internalType":"uint256","name":"receivingChainId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint256","name":"preparedBlockNumber","type":"uint256"}],"indexed":false,"internalType":"struct ITransactionManager.TransactionData","name":"txData","type":"tuple"},{"indexed":false,"internalType":"address","name":"routerRelayerFeeAsset","type":"address"},{"indexed":false,"internalType":"uint256","name":"routerRelayerFee","type":"uint256"},{"indexed":false,"internalType":"address","name":"caller","type":"address"}],"name":"Fulfill","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":[{"components":[{"internalType":"address","name":"receivingChainTxManagerAddress","type":"address"},{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"router","type":"address"},{"internalType":"address","name":"initiator","type":"address"},{"internalType":"address","name":"sendingAssetId","type":"address"},{"internalType":"address","name":"receivingAssetId","type":"address"},{"internalType":"address","name":"sendingChainFallback","type":"address"},{"internalType":"address","name":"receivingAddress","type":"address"},{"internalType":"address","name":"callTo","type":"address"},{"internalType":"uint256","name":"sendingChainId","type":"uint256"},{"internalType":"uint256","name":"receivingChainId","type":"uint256"},{"internalType":"bytes32","name":"callDataHash","type":"bytes32"},{"internalType":"bytes32","name":"transactionId","type":"bytes32"}],"indexed":false,"internalType":"struct ITransactionManager.InvariantTransactionData","name":"invariantData","type":"tuple"},{"indexed":false,"internalType":"address","name":"routerRelayerFeeAsset","type":"address"},{"indexed":false,"internalType":"uint256","name":"routerRelayerFee","type":"uint256"},{"indexed":false,"internalType":"address","name":"caller","type":"address"}],"name":"Prepare","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"assetId","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"caller","type":"address"}],"name":"RelayerFeeAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"assetId","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"caller","type":"address"}],"name":"RelayerFeeRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"assetId","type":"address"},{"indexed":false,"internalType":"address","name":"routerRelayerFeeAsset","type":"address"},{"indexed":false,"internalType":"uint256","name":"routerRelayerFee","type":"uint256"},{"indexed":false,"internalType":"address","name":"caller","type":"address"}],"name":"RemoveLiquidity","type":"event"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"assetId","type":"address"}],"name":"addRelayerFee","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"components":[{"internalType":"address","name":"receivingChainTxManagerAddress","type":"address"},{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"router","type":"address"},{"internalType":"address","name":"initiator","type":"address"},{"internalType":"address","name":"sendingAssetId","type":"address"},{"internalType":"address","name":"receivingAssetId","type":"address"},{"internalType":"address","name":"sendingChainFallback","type":"address"},{"internalType":"address","name":"receivingAddress","type":"address"},{"internalType":"address","name":"callTo","type":"address"},{"internalType":"bytes32","name":"callDataHash","type":"bytes32"},{"internalType":"bytes32","name":"transactionId","type":"bytes32"},{"internalType":"uint256","name":"sendingChainId","type":"uint256"},{"internalType":"uint256","name":"receivingChainId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint256","name":"preparedBlockNumber","type":"uint256"}],"internalType":"struct ITransactionManager.TransactionData","name":"txData","type":"tuple"},{"internalType":"bytes","name":"signature","type":"bytes"},{"internalType":"bytes","name":"encodedMeta","type":"bytes"}],"internalType":"struct ITransactionManager.CancelArgs","name":"args","type":"tuple"},{"internalType":"address","name":"routerRelayerFeeAsset","type":"address"},{"internalType":"uint256","name":"routerRelayerFee","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"cancel","outputs":[{"components":[{"internalType":"address","name":"receivingChainTxManagerAddress","type":"address"},{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"router","type":"address"},{"internalType":"address","name":"initiator","type":"address"},{"internalType":"address","name":"sendingAssetId","type":"address"},{"internalType":"address","name":"receivingAssetId","type":"address"},{"internalType":"address","name":"sendingChainFallback","type":"address"},{"internalType":"address","name":"receivingAddress","type":"address"},{"internalType":"address","name":"callTo","type":"address"},{"internalType":"bytes32","name":"callDataHash","type":"bytes32"},{"internalType":"bytes32","name":"transactionId","type":"bytes32"},{"internalType":"uint256","name":"sendingChainId","type":"uint256"},{"internalType":"uint256","name":"receivingChainId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint256","name":"preparedBlockNumber","type":"uint256"}],"internalType":"struct ITransactionManager.TransactionData","name":"","type":"tuple"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"components":[{"internalType":"address","name":"receivingChainTxManagerAddress","type":"address"},{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"router","type":"address"},{"internalType":"address","name":"initiator","type":"address"},{"internalType":"address","name":"sendingAssetId","type":"address"},{"internalType":"address","name":"receivingAssetId","type":"address"},{"internalType":"address","name":"sendingChainFallback","type":"address"},{"internalType":"address","name":"receivingAddress","type":"address"},{"internalType":"address","name":"callTo","type":"address"},{"internalType":"bytes32","name":"callDataHash","type":"bytes32"},{"internalType":"bytes32","name":"transactionId","type":"bytes32"},{"internalType":"uint256","name":"sendingChainId","type":"uint256"},{"internalType":"uint256","name":"receivingChainId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint256","name":"preparedBlockNumber","type":"uint256"}],"internalType":"struct ITransactionManager.TransactionData","name":"txData","type":"tuple"},{"internalType":"uint256","name":"relayerFee","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"},{"internalType":"bytes","name":"callData","type":"bytes"},{"internalType":"bytes","name":"encodedMeta","type":"bytes"}],"internalType":"struct ITransactionManager.FulfillArgs","name":"args","type":"tuple"},{"internalType":"address","name":"routerRelayerFeeAsset","type":"address"},{"internalType":"uint256","name":"routerRelayerFee","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"fulfill","outputs":[{"components":[{"internalType":"address","name":"receivingChainTxManagerAddress","type":"address"},{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"router","type":"address"},{"internalType":"address","name":"initiator","type":"address"},{"internalType":"address","name":"sendingAssetId","type":"address"},{"internalType":"address","name":"receivingAssetId","type":"address"},{"internalType":"address","name":"sendingChainFallback","type":"address"},{"internalType":"address","name":"receivingAddress","type":"address"},{"internalType":"address","name":"callTo","type":"address"},{"internalType":"bytes32","name":"callDataHash","type":"bytes32"},{"internalType":"bytes32","name":"transactionId","type":"bytes32"},{"internalType":"uint256","name":"sendingChainId","type":"uint256"},{"internalType":"uint256","name":"receivingChainId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint256","name":"preparedBlockNumber","type":"uint256"}],"internalType":"struct ITransactionManager.TransactionData","name":"","type":"tuple"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_transactionManager","type":"address"},{"internalType":"uint256","name":"_chainId","type":"uint256"},{"internalType":"address","name":"_routerSigner","type":"address"},{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"address","name":"_owner","type":"address"}],"name":"init","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"components":[{"internalType":"address","name":"receivingChainTxManagerAddress","type":"address"},{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"router","type":"address"},{"internalType":"address","name":"initiator","type":"address"},{"internalType":"address","name":"sendingAssetId","type":"address"},{"internalType":"address","name":"receivingAssetId","type":"address"},{"internalType":"address","name":"sendingChainFallback","type":"address"},{"internalType":"address","name":"receivingAddress","type":"address"},{"internalType":"address","name":"callTo","type":"address"},{"internalType":"uint256","name":"sendingChainId","type":"uint256"},{"internalType":"uint256","name":"receivingChainId","type":"uint256"},{"internalType":"bytes32","name":"callDataHash","type":"bytes32"},{"internalType":"bytes32","name":"transactionId","type":"bytes32"}],"internalType":"struct ITransactionManager.InvariantTransactionData","name":"invariantData","type":"tuple"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"bytes","name":"encryptedCallData","type":"bytes"},{"internalType":"bytes","name":"encodedBid","type":"bytes"},{"internalType":"bytes","name":"bidSignature","type":"bytes"},{"internalType":"bytes","name":"encodedMeta","type":"bytes"}],"internalType":"struct ITransactionManager.PrepareArgs","name":"args","type":"tuple"},{"internalType":"address","name":"routerRelayerFeeAsset","type":"address"},{"internalType":"uint256","name":"routerRelayerFee","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"prepare","outputs":[{"components":[{"internalType":"address","name":"receivingChainTxManagerAddress","type":"address"},{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"router","type":"address"},{"internalType":"address","name":"initiator","type":"address"},{"internalType":"address","name":"sendingAssetId","type":"address"},{"internalType":"address","name":"receivingAssetId","type":"address"},{"internalType":"address","name":"sendingChainFallback","type":"address"},{"internalType":"address","name":"receivingAddress","type":"address"},{"internalType":"address","name":"callTo","type":"address"},{"internalType":"bytes32","name":"callDataHash","type":"bytes32"},{"internalType":"bytes32","name":"transactionId","type":"bytes32"},{"internalType":"uint256","name":"sendingChainId","type":"uint256"},{"internalType":"uint256","name":"receivingChainId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint256","name":"preparedBlockNumber","type":"uint256"}],"internalType":"struct ITransactionManager.TransactionData","name":"","type":"tuple"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"recipient","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"assetId","type":"address"},{"internalType":"address","name":"routerRelayerFeeAsset","type":"address"},{"internalType":"uint256","name":"routerRelayerFee","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"removeLiquidity","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"assetId","type":"address"}],"name":"removeRelayerFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"routerFactory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"routerSigner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"}],"name":"setRecipient","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_routerSigner","type":"address"}],"name":"setSigner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"transactionManager","outputs":[{"internalType":"contract ITransactionManager","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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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.