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Contract

0x4809091ee2a26d4e79776c8267666e971f786C5C
 

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Method
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From
To
Withdraw183397762023-10-13 6:46:59367 days ago1697179619IN
0x4809091e...71f786C5C
0 ETH0.000537815.21829174
Claim Request183326332023-10-12 6:46:23368 days ago1697093183IN
0x4809091e...71f786C5C
0.01 ETH0.000878385.85462301
Withdraw183273252023-10-11 12:52:47369 days ago1697028767IN
0x4809091e...71f786C5C
0 ETH0.000639166.21437517
Claim Request183201732023-10-10 12:52:11370 days ago1696942331IN
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0.01 ETH0.001245088.29880246
Create Request183201692023-10-10 12:51:23370 days ago1696942283IN
0x4809091e...71f786C5C
0 ETH0.001874768.46454537
Withdraw182950112023-10-07 0:23:59373 days ago1696638239IN
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0 ETH0.000582425.65113185
Claim Request182878572023-10-06 0:23:23374 days ago1696551803IN
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0.01 ETH0.00087675.84346902
Withdraw182833042023-10-05 9:05:59375 days ago1696496759IN
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0 ETH0.000727317.07147747
Withdraw182832942023-10-05 9:03:47375 days ago1696496627IN
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0 ETH0.000925437.91599333
Claim Request182761362023-10-04 9:02:59376 days ago1696410179IN
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0.01 ETH0.001079387.19436084
Claim Request182761222023-10-04 9:00:11376 days ago1696410011IN
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0.01 ETH0.001156687.7095669
Create Request182761182023-10-04 8:59:23376 days ago1696409963IN
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0 ETH0.00157877.23510001
Withdraw182255892023-09-27 7:23:59383 days ago1695799439IN
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0 ETH0.000786287.64479839
Claim Request182184392023-09-26 7:23:23384 days ago1695713003IN
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0.01 ETH0.001091767.27687224
Withdraw181973162023-09-23 8:25:59387 days ago1695457559IN
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0 ETH0.000884957.5696945
Claim Request181901832023-09-22 8:25:23388 days ago1695371123IN
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0.01 ETH0.001339078.92525953
Withdraw181761092023-09-20 9:08:35390 days ago1695200915IN
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0 ETH0.000869198.45089139
Withdraw181756852023-09-20 7:43:11390 days ago1695195791IN
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0 ETH0.000756529.43749138
Withdraw181756842023-09-20 7:42:59390 days ago1695195779IN
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0 ETH0.000904918.7801536
Claim Request181689652023-09-19 9:07:59391 days ago1695114479IN
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0.01 ETH0.0017159611.43822538
Create Request181689612023-09-19 9:07:11391 days ago1695114431IN
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0 ETH0.0024432111.26299383
Claim Request181685432023-09-19 7:42:47391 days ago1695109367IN
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0.01 ETH0.0014239510.71186778
Claim Request181685422023-09-19 7:42:35391 days ago1695109355IN
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0.01 ETH0.0016394210.9271373
Withdraw181582062023-09-17 20:47:59393 days ago1694983679IN
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0 ETH0.001009418.8233694
Claim Request181511582023-09-16 20:47:23394 days ago1694897243IN
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0.01 ETH0.001476569.8416865
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183397762023-10-13 6:46:59367 days ago1697179619
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0.01 ETH
183273252023-10-11 12:52:47369 days ago1697028767
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0.01 ETH
182950112023-10-07 0:23:59373 days ago1696638239
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0.01 ETH
182833042023-10-05 9:05:59375 days ago1696496759
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0.01 ETH
182832942023-10-05 9:03:47375 days ago1696496627
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182255892023-09-27 7:23:59383 days ago1695799439
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0.01 ETH
181973162023-09-23 8:25:59387 days ago1695457559
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181761092023-09-20 9:08:35390 days ago1695200915
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181756852023-09-20 7:43:11390 days ago1695195791
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181756842023-09-20 7:42:59390 days ago1695195779
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181582062023-09-17 20:47:59393 days ago1694983679
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181402652023-09-15 7:54:47395 days ago1694764487
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181402642023-09-15 7:54:35395 days ago1694764475
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181357502023-09-14 16:40:35396 days ago1694709635
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180875002023-09-07 22:22:23403 days ago1694125343
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180596752023-09-04 0:55:47406 days ago1693788947
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180587822023-09-03 21:56:11407 days ago1693778171
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180516542023-09-02 21:59:23408 days ago1693691963
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180368112023-08-31 20:01:59410 days ago1693512119
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180308572023-08-31 0:03:11410 days ago1693440191
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180131912023-08-28 12:38:11413 days ago1693226291
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0xDeDf727F...7af1b57b6
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
RequestManager

Compiler Version
v0.8.19+commit.7dd6d404

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license
File 1 of 13 : RequestManager.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "OpenZeppelin/[email protected]/contracts/token/ERC20/IERC20.sol";
import "OpenZeppelin/[email protected]/contracts/token/ERC20/utils/SafeERC20.sol";
import "OpenZeppelin/[email protected]/contracts/utils/math/Math.sol";
import "OpenZeppelin/[email protected]/contracts/access/Ownable.sol";
import "OpenZeppelin/[email protected]/contracts/security/Pausable.sol";

import "./BeamerUtils.sol";
import "./RestrictedCalls.sol";
import "./LpWhitelist.sol";

/// The request manager.
///
/// This contract is responsible for keeping track of transfer requests,
/// implementing the rules of the challenge game and holding deposited
/// tokens until they are withdrawn.
/// The information passed by L1 resolution will be stored with the respective requests.
///
/// It is the only contract that agents need to interact with on the source chain.
/// .. note::
///
///   The functions resolveRequest and invalidateFill can only be called by
///   the :sol:contract:`Resolver` contract, via a chain-dependent messenger contract.
contract RequestManager is Ownable, LpWhitelist, RestrictedCalls, Pausable {
    using Math for uint256;
    using SafeERC20 for IERC20;

    // Structs
    // TODO: check if we can use a smaller type for `targetChainId`, so that the
    // fields can be packed into one storage slot
    struct Request {
        address sender;
        address sourceTokenAddress;
        uint256 targetChainId;
        uint256 amount;
        uint32 validUntil;
        uint256 lpFee;
        uint256 protocolFee;
        uint32 activeClaims;
        uint96 withdrawClaimId;
        address filler;
        bytes32 fillId;
        mapping(bytes32 fillId => bool invalid) invalidFillIds;
    }

    struct Claim {
        bytes32 requestId;
        address claimer;
        uint96 claimerStake;
        mapping(address challenger => uint96 stake) challengersStakes;
        address lastChallenger;
        uint96 challengerStakeTotal;
        uint256 withdrawnAmount;
        uint256 termination;
        bytes32 fillId;
    }

    struct Token {
        uint256 transferLimit;
        uint256 ethInToken;
        uint256 collectedProtocolFees;
    }

    struct Chain {
        uint256 finalityPeriod;
        uint256 transferCost;
        uint256 targetWeightPPM;
    }

    // Events

    /// Emitted when a new request has been created.
    ///
    /// .. seealso:: :sol:func:`createRequest`
    event RequestCreated(
        bytes32 indexed requestId,
        uint256 targetChainId,
        address sourceTokenAddress,
        address targetTokenAddress,
        address indexed sourceAddress,
        address targetAddress,
        uint256 amount,
        uint96 nonce,
        uint32 validUntil,
        uint256 lpFee,
        uint256 protocolFee
    );

    /// Emitted when the token deposit for request ``requestId`` has been
    /// transferred to the ``receiver``.
    ///
    /// This can happen in two cases:
    ///
    ///  * the request expired and the request submitter called :sol:func:`withdrawExpiredRequest`
    ///  * a claim related to the request has been resolved successfully in favor of the claimer
    ///
    /// .. seealso:: :sol:func:`withdraw` :sol:func:`withdrawExpiredRequest`
    event DepositWithdrawn(bytes32 requestId, address receiver);

    /// Emitted when a claim or a counter-claim (challenge) has been made.
    ///
    /// .. seealso:: :sol:func:`claimRequest` :sol:func:`challengeClaim`
    event ClaimMade(
        bytes32 indexed requestId,
        uint96 claimId,
        address claimer,
        uint96 claimerStake,
        address lastChallenger,
        uint96 challengerStakeTotal,
        uint256 termination,
        bytes32 fillId
    );

    /// Emitted when staked native tokens tied to a claim have been withdrawn.
    ///
    /// This can only happen when the claim has been resolved and the caller
    /// of :sol:func:`withdraw` is allowed to withdraw their stake.
    ///
    /// .. seealso:: :sol:func:`withdraw`
    event ClaimStakeWithdrawn(
        uint96 claimId,
        bytes32 indexed requestId,
        address stakeRecipient
    );

    /// Emitted when fees are updated.
    ///
    /// .. seealso:: :sol:func:`updateFees`
    event FeesUpdated(uint32 minFeePPM, uint32 lpFeePPM, uint32 protocolFeePPM);

    /// Emitted when token object of a token address is updated.
    ///
    /// .. seealso:: :sol:func:`updateToken`
    event TokenUpdated(
        address indexed tokenAddress,
        uint256 transferLimit,
        uint256 ethInToken
    );

    /// Emitted when chain object of a chain id is updated.
    ///
    /// .. seealso:: :sol:func:`updateChain`
    event ChainUpdated(
        uint256 indexed chainId,
        uint256 finalityPeriod,
        uint256 transferCost,
        uint256 targetWeightPPM
    );

    /// Emitted when a request has been resolved via L1 resolution.
    ///
    /// .. seealso:: :sol:func:`resolveRequest`
    event RequestResolved(bytes32 requestId, address filler, bytes32 fillId);

    /// Emitted when an invalidated fill has been resolved.
    ///
    /// .. seealso:: :sol:func:`invalidateFill`
    event FillInvalidatedResolved(bytes32 requestId, bytes32 fillId);

    // Constants

    /// The minimum amount of source chain's native token that the claimer needs to
    /// provide when making a claim, as well in each round of the challenge game.
    uint96 public immutable claimStake;

    /// The additional time given to claim a request. This value is added to the
    /// validity period of a request.
    uint256 public immutable claimRequestExtension;

    /// The period for which the claim is valid.
    uint256 public immutable claimPeriod;

    /// The period by which the termination time of a claim is extended after each
    /// round of the challenge game. This period should allow enough time for the
    /// other parties to counter-challenge.
    ///
    /// .. note::
    ///
    ///    The claim's termination time is extended only if it is less than the
    ///    extension time.
    ///
    /// Note that in the first challenge round, i.e. the round initiated by the first
    /// challenger, the termination time is extended additionally by the finality
    /// period of the target chain. This is done to allow for L1 resolution.
    uint256 public immutable challengePeriodExtension;

    /// PPM to determine the minLpFee profit for liquidity providers.
    uint32 public minFeePPM;

    /// PPM from transfer amount to determine the LP's fee
    uint32 public lpFeePPM;

    /// PPM from transfer amount to determine the protocol's fee
    uint32 public protocolFeePPM;

    /// The minimum validity period of a request.
    uint256 public constant MIN_VALIDITY_PERIOD = 30 minutes;

    /// The maximum validity period of a request.
    uint256 public constant MAX_VALIDITY_PERIOD = 48 hours;

    /// withdrawClaimId is set to this value when an expired request gets withdrawn by the sender
    uint96 public constant CLAIM_ID_WITHDRAWN_EXPIRED = type(uint96).max;

    // Variables

    /// A counter used to generate request and claim IDs.
    /// The variable holds the most recently used nonce and must
    /// be incremented to get the next nonce
    uint96 public currentNonce;

    /// Maps target rollup chain IDs to chain information.
    mapping(uint256 chainId => Chain) public chains;

    /// Maps request IDs to requests.
    mapping(bytes32 requestId => Request) public requests;

    /// Maps claim IDs to claims.
    mapping(uint96 claimId => Claim) public claims;

    /// Maps ERC20 token address to tokens
    mapping(address tokenAddress => Token) public tokens;

    /// Compute the minimum liquidity provider fee that needs to be paid for a token transfer.
    function minLpFee(
        uint256 targetChainId,
        address tokenAddress
    ) public view returns (uint256) {
        Token storage token = tokens[tokenAddress];
        Chain storage sourceChain = chains[block.chainid];
        Chain storage targetChain = chains[targetChainId];

        // The shift by 30 decimals comes from a multiplication of two PPM divisions (1e6 each)
        // and the 18 decimals division for ether
        return
            (((1_000_000 - sourceChain.targetWeightPPM) *
                sourceChain.transferCost +
                targetChain.targetWeightPPM *
                targetChain.transferCost) *
                (minFeePPM + 1_000_000) *
                token.ethInToken) / 10 ** 30;
    }

    /// Compute the liquidity provider fee that needs to be paid for a given transfer amount.
    function lpFee(
        uint256 targetChainId,
        address tokenAddress,
        uint256 amount
    ) public view returns (uint256) {
        uint256 minFee = minLpFee(targetChainId, tokenAddress);
        return Math.max(minFee, (amount * lpFeePPM) / 1_000_000);
    }

    /// Compute the protocol fee that needs to be paid for a given transfer amount.
    function protocolFee(uint256 amount) public view returns (uint256) {
        return (amount * protocolFeePPM) / 1_000_000;
    }

    /// Compute the total fee that needs to be paid for a given transfer amount.
    /// The total fee is the sum of the liquidity provider fee and the protocol fee.
    function totalFee(
        uint256 targetChainId,
        address tokenAddress,
        uint256 amount
    ) public view returns (uint256) {
        return lpFee(targetChainId, tokenAddress, amount) + protocolFee(amount);
    }

    /// Return the transferable amount excluding fees.
    ///
    /// It takes the given amount and calculates the actual transferable amount without fees
    /// based on the token address and its current fees.
    ///
    /// @param targetChainId ID of the target chain.
    /// @param tokenAddress Address of the token contract on the source chain.
    /// @param amount Amount of tokens to transfer including fees.
    /// @return transferable amount excluding fees.
    function transferableAmount(
        uint256 targetChainId,
        address tokenAddress,
        uint256 amount
    ) public view returns (uint256) {
        uint256 minFee = minLpFee(targetChainId, tokenAddress);
        require(amount > minFee, "Amount not high enough to cover the fees");
        // FIXME: There is a possible rounding error which leads to off by one unit
        // currently the error happens in "our" favor so that the dust stays in the wallet.
        // Can probably be fixed by rounding on the token.decimals() + 1 th digit
        uint256 transferableAmount = (amount * 1_000_000) /
            (1_000_000 + lpFeePPM + protocolFeePPM);

        if ((transferableAmount * lpFeePPM) / 1_000_000 >= minFee) {
            return transferableAmount;
        }

        return ((amount - minFee) * 1_000_000) / (1_000_000 + protocolFeePPM);
    }

    // Modifiers

    /// Check whether a given request ID is valid.
    modifier validRequestId(bytes32 requestId) {
        require(
            requests[requestId].sender != address(0),
            "requestId not valid"
        );
        _;
    }

    /// Check whether a given claim ID is valid.
    modifier validClaimId(uint96 claimId) {
        require(claims[claimId].claimer != address(0), "claimId not valid");
        _;
    }

    /// Constructor.
    ///
    /// @param _claimStake Claim stake amount.
    /// @param _claimRequestExtension Extension to claim a request after validity period ends.
    /// @param _claimPeriod Claim period, in seconds.
    /// @param _challengePeriodExtension Challenge period extension, in seconds.
    constructor(
        uint96 _claimStake,
        uint256 _claimRequestExtension,
        uint256 _claimPeriod,
        uint256 _challengePeriodExtension
    ) {
        claimStake = _claimStake;
        claimRequestExtension = _claimRequestExtension;
        claimPeriod = _claimPeriod;
        challengePeriodExtension = _challengePeriodExtension;
    }

    /// Create a new transfer request.
    ///
    /// @param targetChainId ID of the target chain.
    /// @param sourceTokenAddress Address of the token contract on the source chain.
    /// @param targetTokenAddress Address of the token contract on the target chain.
    /// @param targetAddress Recipient address on the target chain.
    /// @param amount Amount of tokens to transfer. Does not include fees.
    /// @param validityPeriod The number of seconds the request is to be considered valid.
    ///                       Once its validity period has elapsed, the request cannot be claimed
    ///                       anymore and will eventually expire, allowing the request submitter
    ///                       to withdraw the deposited tokens if there are no active claims.
    /// @return ID of the newly created request.
    function createRequest(
        uint256 targetChainId,
        address sourceTokenAddress,
        address targetTokenAddress,
        address targetAddress,
        uint256 amount,
        uint256 validityPeriod
    ) external whenNotPaused returns (bytes32) {
        require(
            chains[targetChainId].finalityPeriod != 0,
            "Target rollup not supported"
        );
        require(
            validityPeriod >= MIN_VALIDITY_PERIOD,
            "Validity period too short"
        );
        require(
            validityPeriod <= MAX_VALIDITY_PERIOD,
            "Validity period too long"
        );
        require(
            amount <= tokens[sourceTokenAddress].transferLimit,
            "Amount exceeds transfer limit"
        );

        uint256 lpFeeTokenAmount = lpFee(
            targetChainId,
            sourceTokenAddress,
            amount
        );
        uint256 protocolFeeTokenAmount = protocolFee(amount);

        require(
            IERC20(sourceTokenAddress).allowance(msg.sender, address(this)) >=
                amount + lpFeeTokenAmount + protocolFeeTokenAmount,
            "Insufficient allowance"
        );

        uint96 nonce = currentNonce + 1;
        currentNonce = nonce;

        bytes32 requestId = BeamerUtils.createRequestId(
            block.chainid,
            targetChainId,
            targetTokenAddress,
            targetAddress,
            amount,
            nonce
        );

        Request storage newRequest = requests[requestId];
        newRequest.sender = msg.sender;
        newRequest.sourceTokenAddress = sourceTokenAddress;
        newRequest.targetChainId = targetChainId;
        newRequest.amount = amount;
        newRequest.validUntil = uint32(block.timestamp + validityPeriod);
        newRequest.lpFee = lpFeeTokenAmount;
        newRequest.protocolFee = protocolFeeTokenAmount;

        emit RequestCreated(
            requestId,
            targetChainId,
            sourceTokenAddress,
            targetTokenAddress,
            msg.sender,
            targetAddress,
            amount,
            nonce,
            uint32(block.timestamp + validityPeriod),
            lpFeeTokenAmount,
            protocolFeeTokenAmount
        );

        IERC20(sourceTokenAddress).safeTransferFrom(
            msg.sender,
            address(this),
            amount + lpFeeTokenAmount + protocolFeeTokenAmount
        );

        return requestId;
    }

    /// Withdraw funds deposited with an expired request.
    ///
    /// No claims must be active for the request.
    ///
    /// @param requestId ID of the expired request.
    function withdrawExpiredRequest(
        bytes32 requestId
    ) external validRequestId(requestId) {
        Request storage request = requests[requestId];

        require(request.withdrawClaimId == 0, "Deposit already withdrawn");
        require(
            block.timestamp >= request.validUntil,
            "Request not expired yet"
        );
        require(request.activeClaims == 0, "Active claims running");

        request.withdrawClaimId = CLAIM_ID_WITHDRAWN_EXPIRED;

        emit DepositWithdrawn(requestId, request.sender);

        IERC20 token = IERC20(request.sourceTokenAddress);
        token.safeTransfer(
            request.sender,
            request.amount + request.lpFee + request.protocolFee
        );
    }

    /// Claim that a request was filled by the caller.
    ///
    /// The request must still be valid at call time.
    /// The caller must provide the ``claimStake`` amount of source rollup's native
    /// token.
    ///
    /// @param requestId ID of the request.
    /// @param fillId The fill ID.
    /// @return The claim ID.
    function claimRequest(
        bytes32 requestId,
        bytes32 fillId
    )
        external
        payable
        validRequestId(requestId)
        onlyAllowed(msg.sender)
        returns (uint96)
    {
        return claimRequest(msg.sender, requestId, fillId);
    }

    /// Claim that a request was filled.
    ///
    /// The request must still be valid at call time.
    /// The caller must provide the ``claimStake`` amount of source rollup's native
    /// token.
    /// Only the claimer may get the stake back later.
    ///
    /// @param claimer Address of the claimer.
    /// @param requestId ID of the request.
    /// @param fillId The fill ID.
    /// @return The claim ID.
    function claimRequest(
        address claimer,
        bytes32 requestId,
        bytes32 fillId
    )
        public
        payable
        validRequestId(requestId)
        onlyAllowed(claimer)
        returns (uint96)
    {
        Request storage request = requests[requestId];

        require(
            block.timestamp < request.validUntil + claimRequestExtension,
            "Request cannot be claimed anymore"
        );
        require(request.withdrawClaimId == 0, "Deposit already withdrawn");
        require(msg.value == claimStake, "Invalid stake amount");
        require(claimer != address(0), "Claimer can't be zero address");
        require(fillId != bytes32(0), "FillId must not be 0x0");

        request.activeClaims += 1;

        uint96 nonce = currentNonce + 1;
        currentNonce = nonce;
        uint256 termination = block.timestamp + claimPeriod;

        Claim storage claim = claims[nonce];
        claim.requestId = requestId;
        claim.claimer = claimer;
        claim.claimerStake = uint96(msg.value);
        claim.termination = termination;
        claim.fillId = fillId;

        emit ClaimMade(
            requestId,
            nonce,
            claimer,
            uint96(msg.value),
            address(0),
            0,
            termination,
            fillId
        );

        return nonce;
    }

    /// Challenge an existing claim.
    ///
    /// The claim must still be valid at call time.
    /// This function implements one round of the challenge game.
    /// The original claimer is allowed to call this function only
    /// after someone else made a challenge, i.e. every second round.
    /// However, once the original claimer counter-challenges, anyone
    /// can join the game and make another challenge.
    ///
    /// The caller must provide enough native tokens as their stake.
    /// For the original claimer, the minimum stake is
    /// ``challengerStakeTotal - claimerStake + claimStake``.
    ///
    /// For challengers, the minimum stake is
    /// ``claimerStake - challengerStakeTotal + 1``.
    ///
    /// An example (time flows downwards, claimStake = 10)::
    ///
    ///   claimRequest() by Max [stakes 10]
    ///   challengeClaim() by Alice [stakes 11]
    ///   challengeClaim() by Max [stakes 11]
    ///   challengeClaim() by Bob [stakes 16]
    ///
    /// In this example, if Max didn't want to lose the challenge game to
    /// Alice and Bob, he would have to challenge with a stake of at least 16.
    ///
    /// @param claimId The claim ID.
    function challengeClaim(
        uint96 claimId
    ) external payable validClaimId(claimId) {
        Claim storage claim = claims[claimId];
        bytes32 requestId = claim.requestId;
        uint256 termination = claim.termination;
        require(block.timestamp < termination, "Claim expired");
        require(
            requests[requestId].filler == address(0),
            "Request already resolved"
        );
        require(
            !requests[requestId].invalidFillIds[claim.fillId],
            "Fill already invalidated"
        );

        uint256 periodExtension = challengePeriodExtension;
        address claimer = claim.claimer;
        uint96 claimerStake = claim.claimerStake;
        uint96 challengerStakeTotal = claim.challengerStakeTotal;

        if (claimerStake > challengerStakeTotal) {
            if (challengerStakeTotal == 0) {
                periodExtension += chains[requests[requestId].targetChainId]
                    .finalityPeriod;
            }
            require(msg.sender != claimer, "Cannot challenge own claim");
            require(
                msg.value >= claimerStake - challengerStakeTotal + 1,
                "Not enough stake provided"
            );
        } else {
            require(msg.sender == claimer, "Not eligible to outbid");
            require(
                msg.value >= challengerStakeTotal - claimerStake + claimStake,
                "Not enough stake provided"
            );
        }

        if (msg.sender == claimer) {
            claimerStake += uint96(msg.value);
            claim.claimerStake = claimerStake;
        } else {
            claim.lastChallenger = msg.sender;
            claim.challengersStakes[msg.sender] += uint96(msg.value);
            challengerStakeTotal += uint96(msg.value);
            claim.challengerStakeTotal = challengerStakeTotal;
        }

        if (block.timestamp + periodExtension > termination) {
            termination = block.timestamp + periodExtension;
            claim.termination = termination;
        }

        emit ClaimMade(
            requestId,
            claimId,
            claimer,
            claimerStake,
            claim.lastChallenger,
            challengerStakeTotal,
            termination,
            claim.fillId
        );
    }

    /// Withdraw the deposit that the request submitter left with the contract,
    /// as well as the staked native tokens associated with the claim.
    ///
    /// In case the caller of this function is a challenger that won the game,
    /// they will only get their staked native tokens plus the reward in the form
    /// of full (sole challenger) or partial (multiple challengers) amount
    /// of native tokens staked by the dishonest claimer.
    ///
    /// @param claimId The claim ID.
    /// @return The claim stakes receiver.
    function withdraw(
        uint96 claimId
    ) external validClaimId(claimId) returns (address) {
        return withdraw(msg.sender, claimId);
    }

    /// Withdraw the deposit that the request submitter left with the contract,
    /// as well as the staked native tokens associated with the claim.
    ///
    /// This function is called on behalf of a participant. Only a participant
    /// may receive the funds if he is the winner of the challenge or the claim is valid.
    ///
    /// In case the caller of this function is a challenger that won the game,
    /// they will only get their staked native tokens plus the reward in the form
    /// of full (sole challenger) or partial (multiple challengers) amount
    /// of native tokens staked by the dishonest claimer.
    ///
    /// @param claimId The claim ID.
    /// @param participant The participant.
    /// @return The claim stakes receiver.
    function withdraw(
        address participant,
        uint96 claimId
    ) public validClaimId(claimId) returns (address) {
        Claim storage claim = claims[claimId];
        address claimer = claim.claimer;
        bytes32 requestId = claim.requestId;
        Request storage request = requests[requestId];

        (address stakeRecipient, uint256 ethToTransfer) = resolveClaim(
            participant,
            claimId
        );

        if (claim.challengersStakes[stakeRecipient] > 0) {
            //Re-entrancy protection
            claim.challengersStakes[stakeRecipient] = 0;
        }

        uint256 withdrawnAmount = claim.withdrawnAmount;

        // First time withdraw is called, remove it from active claims
        if (withdrawnAmount == 0) {
            request.activeClaims -= 1;
        }
        withdrawnAmount += ethToTransfer;
        claim.withdrawnAmount = withdrawnAmount;

        require(
            withdrawnAmount <= claim.claimerStake + claim.challengerStakeTotal,
            "Amount to withdraw too large"
        );

        (bool sent, ) = stakeRecipient.call{value: ethToTransfer}("");
        require(sent, "Failed to send Ether");

        emit ClaimStakeWithdrawn(claimId, requestId, stakeRecipient);

        if (request.withdrawClaimId == 0 && stakeRecipient == claimer) {
            withdrawDeposit(request, claimId);
        }

        return stakeRecipient;
    }

    function resolveClaim(
        address participant,
        uint96 claimId
    ) private view returns (address, uint256) {
        Claim storage claim = claims[claimId];
        Request storage request = requests[claim.requestId];
        uint96 withdrawClaimId = request.withdrawClaimId;
        address claimer = claim.claimer;
        uint96 claimerStake = claim.claimerStake;
        uint96 challengerStakeTotal = claim.challengerStakeTotal;
        require(
            claim.withdrawnAmount < claimerStake + challengerStakeTotal,
            "Claim already withdrawn"
        );

        bool claimValid = false;

        // The claim is resolved with the following priority:
        // 1) The l1 resolved filler is the claimer and l1 resolved fillId matches, claim is valid
        // 2) FillId is true in request's invalidFillIds, claim is invalid
        // 3) The withdrawer's claim matches exactly this claim (same claimer address, same fillId)
        // 4) Claim properties, claim terminated and claimer has the highest stake
        if (request.filler != address(0)) {
            // Claim resolution via 1)
            claimValid =
                request.filler == claimer &&
                request.fillId == claim.fillId;
        } else if (request.invalidFillIds[claim.fillId]) {
            // Claim resolution via 2)
            claimValid = false;
        } else if (withdrawClaimId != 0) {
            // Claim resolution via 3)
            claimValid =
                claimer == claims[withdrawClaimId].claimer &&
                claim.fillId == claims[withdrawClaimId].fillId;
        } else {
            // Claim resolution via 4)
            require(
                block.timestamp >= claim.termination,
                "Claim period not finished"
            );
            claimValid = claimerStake > challengerStakeTotal;
        }

        // Calculate withdraw scheme for claim stakes
        uint96 ethToTransfer;
        address stakeRecipient;

        if (claimValid) {
            // If claim is valid, all stakes go to the claimer
            stakeRecipient = claimer;
            ethToTransfer = claimerStake + challengerStakeTotal;
        } else if (challengerStakeTotal > 0) {
            // If claim is invalid, partial withdrawal by the participant
            stakeRecipient = participant;
            ethToTransfer = 2 * claim.challengersStakes[stakeRecipient];
            require(ethToTransfer > 0, "Challenger has nothing to withdraw");
        } else {
            // The unlikely event is possible that a false claim has no challenger
            // If it is known that the claim is false then the claimer stake goes to the platform
            stakeRecipient = owner();
            ethToTransfer = claimerStake;
        }

        // If the challenger wins and is the last challenger, he gets either
        // twice his stake plus the excess stake (if the claimer was winning), or
        // twice his stake minus the difference between the claimer and challenger stakes (if the claimer was losing)
        if (stakeRecipient == claim.lastChallenger) {
            if (claimerStake > challengerStakeTotal) {
                ethToTransfer += (claimerStake - challengerStakeTotal);
            } else {
                ethToTransfer -= (challengerStakeTotal - claimerStake);
            }
        }

        return (stakeRecipient, ethToTransfer);
    }

    function withdrawDeposit(Request storage request, uint96 claimId) private {
        Claim storage claim = claims[claimId];
        address claimer = claim.claimer;
        emit DepositWithdrawn(claim.requestId, claimer);

        request.withdrawClaimId = claimId;

        tokens[request.sourceTokenAddress].collectedProtocolFees += request
            .protocolFee;

        IERC20 token = IERC20(request.sourceTokenAddress);
        token.safeTransfer(claimer, request.amount + request.lpFee);
    }

    /// Returns whether a request's deposit was withdrawn or not
    ///
    /// This can be true in two cases:
    /// 1. The deposit was withdrawn after the request was claimed and filled.
    /// 2. The submitter withdrew the deposit after the request's expiry.
    /// .. seealso:: :sol:func:`withdraw`
    /// .. seealso:: :sol:func:`withdrawExpiredRequest`
    ///
    /// @param requestId The request ID
    /// @return Whether the deposit corresponding to the given request ID was withdrawn
    function isWithdrawn(
        bytes32 requestId
    ) public view validRequestId(requestId) returns (bool) {
        return requests[requestId].withdrawClaimId != 0;
    }

    /// Withdraw protocol fees collected by the contract.
    ///
    /// Protocol fees are paid in token transferred.
    ///
    /// .. note:: This function can only be called by the contract owner.
    ///
    /// @param tokenAddress The address of the token contract.
    /// @param recipient The address the fees should be sent to.
    function withdrawProtocolFees(
        address tokenAddress,
        address recipient
    ) external onlyOwner {
        uint256 amount = tokens[tokenAddress].collectedProtocolFees;
        require(amount > 0, "Protocol fee is zero");
        tokens[tokenAddress].collectedProtocolFees = 0;

        IERC20 token = IERC20(tokenAddress);
        token.safeTransfer(recipient, amount);
    }

    /// Update fees
    ///
    /// .. note:: This function can only be called by the contract owner.
    ///
    /// @param _minFeePPM Margin which is going to be applied to the minLpFee
    /// @param _lpFeePPM LP percentage fee applied on transfer amount denominated in parts per million
    /// @param _protocolFeePPM Protocol fee applied on transfer amount denominated in parts per million
    function updateFees(
        uint32 _minFeePPM,
        uint32 _lpFeePPM,
        uint32 _protocolFeePPM
    ) external onlyOwner {
        require(_lpFeePPM <= 999_999, "Maximum PPM of 999999 exceeded");
        require(_protocolFeePPM <= 999_999, "Maximum PPM of 999999 exceeded");

        minFeePPM = _minFeePPM;
        lpFeePPM = _lpFeePPM;
        protocolFeePPM = _protocolFeePPM;

        emit FeesUpdated(_minFeePPM, _lpFeePPM, _protocolFeePPM);
    }

    function updateToken(
        address tokenAddress,
        uint256 transferLimit,
        uint256 ethInToken
    ) external onlyOwner {
        Token storage token = tokens[tokenAddress];
        token.transferLimit = transferLimit;
        token.ethInToken = ethInToken;

        emit TokenUpdated(tokenAddress, transferLimit, ethInToken);
    }

    /// Update chain information for a given chain ID.
    ///
    /// .. note:: This function can only be called by the contract owner.
    ///
    /// @param chainId The chain ID of the chain.
    /// @param finalityPeriod The finality period of the chain in seconds.
    /// @param transferCost The transfer cost (fill, claim, withdraw) on the chain in WEI.
    /// @param targetWeightPPM The share of the target chain costs (fill) in parts per million.
    function updateChain(
        uint256 chainId,
        uint256 finalityPeriod,
        uint256 transferCost,
        uint256 targetWeightPPM
    ) external onlyOwner {
        require(targetWeightPPM <= 999_999, "Maximum PPM of 999999 exceeded");

        Chain storage chain = chains[chainId];
        chain.finalityPeriod = finalityPeriod;
        chain.transferCost = transferCost;
        chain.targetWeightPPM = targetWeightPPM;

        emit ChainUpdated(
            chainId,
            finalityPeriod,
            transferCost,
            targetWeightPPM
        );
    }

    /// Returns whether a fill is invalidated or not
    ///
    /// Calling invalidateFill() will set this boolean to true,
    /// marking that the ``fillId`` for the corresponding ``requestId`` was
    /// invalidated.
    /// Calling resolveRequest will validate it again, setting request.invalidatedFills[fillId]
    /// to false.
    /// .. seealso:: :sol:func:`invalidateFill`
    /// .. seealso:: :sol:func:`resolveRequest`
    ///
    /// @param requestId The request ID
    /// @param fillId The fill ID
    /// @return Whether the fill ID is invalid for the given request ID
    function isInvalidFill(
        bytes32 requestId,
        bytes32 fillId
    ) public view returns (bool) {
        return requests[requestId].invalidFillIds[fillId];
    }

    /// Mark the request identified by ``requestId`` as filled by ``filler``.
    ///
    /// .. note::
    ///
    ///     This function is a restricted call function. Only callable by the added caller.
    ///
    /// @param requestId The request ID.
    /// @param fillId The fill ID.
    /// @param resolutionChainId The resolution (L1) chain ID.
    /// @param filler The address that filled the request.
    function resolveRequest(
        bytes32 requestId,
        bytes32 fillId,
        uint256 resolutionChainId,
        address filler
    ) external restricted(resolutionChainId) {
        Request storage request = requests[requestId];
        request.filler = filler;
        request.fillId = fillId;

        request.invalidFillIds[fillId] = false;

        emit RequestResolved(requestId, filler, fillId);
    }

    /// Mark the fill identified by ``requestId`` and ``fillId`` as invalid.
    ///
    /// .. note::
    ///
    ///     This function is a restricted call function. Only callable by the added caller.
    ///
    /// @param requestId The request ID.
    /// @param fillId The fill ID.
    /// @param resolutionChainId The resolution (L1) chain ID.
    function invalidateFill(
        bytes32 requestId,
        bytes32 fillId,
        uint256 resolutionChainId
    ) external restricted(resolutionChainId) {
        Request storage request = requests[requestId];
        require(
            request.filler == address(0),
            "Cannot invalidate resolved fills"
        );
        require(
            request.invalidFillIds[fillId] == false,
            "Fill already invalidated"
        );

        request.invalidFillIds[fillId] = true;

        emit FillInvalidatedResolved(requestId, fillId);
    }

    /// Pauses the contract.
    ///
    /// Once the contract is paused, it cannot be used to create new
    /// requests anymore. Withdrawing deposited funds and claim stakes
    /// still works, though.
    ///
    /// .. note:: This function can only be called when the contract is not paused.
    /// .. note:: This function can only be called by the contract owner.
    function pause() external onlyOwner {
        _pause();
    }

    /// Unpauses the contract.
    ///
    /// Once the contract is unpaused, it can be used normally.
    ///
    /// .. note:: This function can only be called when the contract is paused.
    /// .. note:: This function can only be called by the contract owner.
    function unpause() external onlyOwner {
        _unpause();
    }
}

File 2 of 13 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

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

File 3 of 13 : LpWhitelist.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "OpenZeppelin/[email protected]/contracts/access/Ownable.sol";

/// Liquidity Provider Whitelist.
///
/// This contract describes the concept of a whitelist for allowed Lps. RequestManager and FillManager
/// inherit from this contract.
contract LpWhitelist is Ownable {
    /// Emitted when a liquidity provider has been added to the set of allowed
    /// liquidity providers.
    ///
    /// .. seealso:: :sol:func:`addAllowedLp`
    event LpAdded(address lp);

    /// Emitted when a liquidity provider has been removed from the set of allowed
    /// liquidity providers.
    ///
    /// .. seealso:: :sol:func:`removeAllowedLp`
    event LpRemoved(address lp);

    /// The mapping containing addresses allowed to provide liquidity.
    mapping(address lp => bool allowed) public allowedLps;

    /// Modifier to check whether the passed address is an allowed LP
    modifier onlyAllowed(address addressToCheck) {
        require(allowedLps[addressToCheck], "Not allowed");
        _;
    }

    /// Add a liquidity provider to the set of allowed liquidity providers.
    ///
    /// .. note:: This function can only be called by the contract owner.
    ///
    /// @param newLp The liquidity provider.
    function addAllowedLp(address newLp) public onlyOwner {
        allowedLps[newLp] = true;

        emit LpAdded(newLp);
    }

    /// Remove a liquidity provider from the set of allowed liquidity providers.
    ///
    /// .. note:: This function can only be called by the contract owner.
    ///
    /// @param oldLp The liquidity provider.
    function removeAllowedLp(address oldLp) public onlyOwner {
        delete allowedLps[oldLp];

        emit LpRemoved(oldLp);
    }
}

File 4 of 13 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

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() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions 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 {
        _transferOwnership(address(0));
    }

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 5 of 13 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

File 6 of 13 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.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));
        }
    }

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(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 13 : draft-IERC20Permit.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

File 8 of 13 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

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

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

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

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

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

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

File 9 of 13 : Pausable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

File 10 of 13 : Math.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator,
        Rounding rounding
    ) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10**64) {
                value /= 10**64;
                result += 64;
            }
            if (value >= 10**32) {
                value /= 10**32;
                result += 32;
            }
            if (value >= 10**16) {
                value /= 10**16;
                result += 16;
            }
            if (value >= 10**8) {
                value /= 10**8;
                result += 8;
            }
            if (value >= 10**4) {
                value /= 10**4;
                result += 4;
            }
            if (value >= 10**2) {
                value /= 10**2;
                result += 2;
            }
            if (value >= 10**1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

File 11 of 13 : BeamerUtils.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

library BeamerUtils {
    function createRequestId(
        uint256 sourceChainId,
        uint256 targetChainId,
        address targetTokenAddress,
        address targetReceiverAddress,
        uint256 amount,
        uint96 nonce
    ) internal pure returns (bytes32) {
        return
            keccak256(
                abi.encodePacked(
                    sourceChainId,
                    targetChainId,
                    targetTokenAddress,
                    targetReceiverAddress,
                    amount,
                    nonce
                )
            );
    }
}

File 12 of 13 : RestrictedCalls.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "OpenZeppelin/[email protected]/contracts/access/Ownable.sol";
import "../interfaces/IMessenger.sol";

/// A helper contract that provides a way to restrict callers of restricted functions
/// to a single address. This allows for a trusted call chain,
/// as described in :ref:`contracts' architecture <contracts-architecture>`.
contract RestrictedCalls is Ownable {
    /// Maps caller chain IDs to tuples [caller, messenger].
    ///
    /// For same-chain calls, the messenger address is 0x0.
    mapping(uint256 callerChainId => address[2]) public callers;

    function _addCaller(
        uint256 callerChainId,
        address caller,
        address messenger
    ) internal {
        require(caller != address(0), "RestrictedCalls: caller cannot be 0");
        require(
            callers[callerChainId][0] == address(0),
            "RestrictedCalls: caller already exists"
        );
        callers[callerChainId] = [caller, messenger];
    }

    /// Allow calls from an address on the same chain.
    ///
    /// @param caller The caller.
    function addCaller(address caller) external onlyOwner {
        _addCaller(block.chainid, caller, address(0));
    }

    /// Allow calls from an address on another chain.
    ///
    /// @param callerChainId The caller's chain ID.
    /// @param caller The caller.
    /// @param messenger The messenger.
    function addCaller(
        uint256 callerChainId,
        address caller,
        address messenger
    ) external onlyOwner {
        _addCaller(callerChainId, caller, messenger);
    }

    /// Mark the function as restricted.
    ///
    /// Calls to the restricted function can only come from an address that
    /// was previously added by a call to :sol:func:`addCaller`.
    ///
    /// Example usage::
    ///
    ///     restricted(block.chainid)   // expecting calls from the same chain
    ///     restricted(otherChainId)    // expecting calls from another chain
    ///
    modifier restricted(uint256 callerChainId) {
        address caller = callers[callerChainId][0];

        if (callerChainId == block.chainid) {
            require(msg.sender == caller, "RestrictedCalls: call disallowed");
        } else {
            address messenger = callers[callerChainId][1];
            require(
                messenger != address(0),
                "RestrictedCalls: messenger not set"
            );
            require(
                IMessenger(messenger).callAllowed(caller, msg.sender),
                "RestrictedCalls: call disallowed"
            );
        }
        _;
    }
}

File 13 of 13 : IMessenger.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.12;

/// The messenger interface.
///
/// Implementations of this interface are expected to transport
/// messages across the L1 <-> L2 boundary. For instance,
/// if an implementation is deployed on L1, the :sol:func:`sendMessage`
/// would send a message to a L2 chain, as determined by the implementation.
/// In order to do this, a messenger implementation may use a native
/// messenger contract. In such cases, :sol:func:`nativeMessenger` must
/// return the address of the native messenger contract.
interface IMessenger {
    /// Send a message across the L1 <-> L2 boundary.
    ///
    /// @param target The message recipient.
    /// @param message The message.
    function sendMessage(address target, bytes calldata message) external;

    /// Return whether the call is allowed or not.
    ///
    /// @param caller The caller.
    /// @param courier The contract that is trying to deliver the message.
    function callAllowed(address caller, address courier)
        external
        view
        returns (bool);
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "remappings": [
    "OpenZeppelin/[email protected]/contracts=.cache/OpenZeppelin/v4.8.0",
    "interfaces=.cache/Interfaces/local"
  ],
  "evmVersion": "london"
}

Contract Security Audit

Contract ABI

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eMutability":"view","type":"function"},{"inputs":[],"name":"MAX_VALIDITY_PERIOD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MIN_VALIDITY_PERIOD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newLp","type":"address"}],"name":"addAllowedLp","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"callerChainId","type":"uint256"},{"internalType":"address","name":"caller","type":"address"},{"internalType":"address","name":"messenger","type":"address"}],"name":"addCaller","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"caller","type":"address"}],"name":"addCaller","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"lp","type":"address"}],"name":"allowedLps","outputs":[{"internalType":"bool","name":"allowed","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"callerChainId","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"callers","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"chainId","type":"uint256"}],"name":"chains","outputs":[{"internalType":"uint256","name":"finalityPeriod","type":"uint256"},{"internalType":"uint256","name":"transferCost","type":"uint256"},{"internalType":"uint256","name":"targetWeightPPM","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint96","name":"claimId","type":"uint96"}],"name":"challengeClaim","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"challengePeriodExtension","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"claimPeriod","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"claimer","type":"address"},{"internalType":"bytes32","name":"requestId","type":"bytes32"},{"internalType":"bytes32","name":"fillId","type":"bytes32"}],"name":"claimRequest","outputs":[{"internalType":"uint96","name":"","type":"uint96"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"requestId","type":"bytes32"},{"internalType":"bytes32","name":"fillId","type":"bytes32"}],"name":"claimRequest","outputs":[{"internalType":"uint96","name":"","type":"uint96"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"claimRequestExtension","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"claimStake","outputs":[{"internalType":"uint96","name":"","type":"uint96"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint96","name":"claimId","type":"uint96"}],"name":"claims","outputs":[{"internalType":"bytes32","name":"requestId","type":"bytes32"},{"internalType":"address","name":"claimer","type":"address"},{"internalType":"uint96","name":"claimerStake","type":"uint96"},{"internalType":"address","name":"lastChallenger","type":"address"},{"internalType":"uint96","name":"challengerStakeTotal","type":"uint96"},{"internalType":"uint256","name":"withdrawnAmount","type":"uint256"},{"internalType":"uint256","name":"termination","type":"uint256"},{"internalType":"bytes32","name":"fillId","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"targetChainId","type":"uint256"},{"internalType":"address","name":"sourceTokenAddress","type":"address"},{"internalType":"address","name":"targetTokenAddress","type":"address"},{"internalType":"address","name":"targetAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"validityPeriod","type":"uint256"}],"name":"createRequest","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"currentNonce","outputs":[{"internalType":"uint96","name":"","type":"uint96"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"requestId","type":"bytes32"},{"internalType":"bytes32","name":"fillId","type":"bytes32"},{"internalType":"uint256","name":"resolutionChainId","type":"uint256"}],"name":"invalidateFill","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"requestId","type":"bytes32"},{"internalType":"bytes32","name":"fillId","type":"bytes32"}],"name":"isInvalidFill","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"requestId","type":"bytes32"}],"name":"isWithdrawn","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"targetChainId","type":"uint256"},{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"lpFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lpFeePPM","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minFeePPM","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"targetChainId","type":"uint256"},{"internalType":"address","name":"tokenAddress","type":"address"}],"name":"minLpFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"protocolFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"protocolFeePPM","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"oldLp","type":"address"}],"name":"removeAllowedLp","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"requestId","type":"bytes32"}],"name":"requests","outputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"sourceTokenAddress","type":"address"},{"internalType":"uint256","name":"targetChainId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint32","name":"validUntil","type":"uint32"},{"internalType":"uint256","name":"lpFee","type":"uint256"},{"internalType":"uint256","name":"protocolFee","type":"uint256"},{"internalType":"uint32","name":"activeClaims","type":"uint32"},{"internalType":"uint96","name":"withdrawClaimId","type":"uint96"},{"internalType":"address","name":"filler","type":"address"},{"internalType":"bytes32","name":"fillId","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"requestId","type":"bytes32"},{"internalType":"bytes32","name":"fillId","type":"bytes32"},{"internalType":"uint256","name":"resolutionChainId","type":"uint256"},{"internalType":"address","name":"filler","type":"address"}],"name":"resolveRequest","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"}],"name":"tokens","outputs":[{"internalType":"uint256","name":"transferLimit","type":"uint256"},{"internalType":"uint256","name":"ethInToken","type":"uint256"},{"internalType":"uint256","name":"collectedProtocolFees","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"targetChainId","type":"uint256"},{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"totalFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"targetChainId","type":"uint256"},{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferableAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"uint256","name":"finalityPeriod","type":"uint256"},{"internalType":"uint256","name":"transferCost","type":"uint256"},{"internalType":"uint256","name":"targetWeightPPM","type":"uint256"}],"name":"updateChain","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"_minFeePPM","type":"uint32"},{"internalType":"uint32","name":"_lpFeePPM","type":"uint32"},{"internalType":"uint32","name":"_protocolFeePPM","type":"uint32"}],"name":"updateFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"transferLimit","type":"uint256"},{"internalType":"uint256","name":"ethInToken","type":"uint256"}],"name":"updateToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"participant","type":"address"},{"internalType":"uint96","name":"claimId","type":"uint96"}],"name":"withdraw","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint96","name":"claimId","type":"uint96"}],"name":"withdraw","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"requestId","type":"bytes32"}],"name":"withdrawExpiredRequest","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"address","name":"recipient","type":"address"}],"name":"withdrawProtocolFees","outputs":[],"stateMutability":"nonpayable","type":"function"}]

Deployed Bytecode

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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.