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// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;

import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "sgn-v2-contracts/contracts/message/framework/MessageReceiverApp.sol";
import "sgn-v2-contracts/contracts/message/interfaces/IMessageBus.sol";
import {AggregatorV3Interface} from "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
import "./libraries/DataTypes.sol";
import "./interfaces/IVault.sol";

/// @title A cross chain sender contract for send message to receiver contract on BSC chain.
// It's for users from other EVM chain can participate Pancakeswap MCV2 farm pool CAKE reward in BSC chain.
contract CrossFarmingSender is MessageReceiverApp {
    using SafeERC20 for IERC20;

    // oracle data feeds
    enum Feeds {
        BNBUSD,
        ETHUSD
    }

    enum Chains {
        EVM,
        BSC
    }

    // cross farming vault contract on EVM chain.
    // Only Vault contract can send farming message to receiver contract.
    address public Vault;
    // cross farming receiver contract on BSC chain.
    address public CROSS_FARMING_RECEIVER;

    // create proxy contract on dest chain(BSC) gas limit.
    uint256 public createProxyGasLimit;
    // gas fee = gaslimit * gasprice, different EVM chain transaction have different average gas price
    // compensation rate in the range [0.1,10], for converting gas fee from dest chain to source chain.
    // for example, source chain gas price is 1/2 dest chain gas price, so the user paid for dest chain transaction
    // fee in sourcechain should base on 2x gas fee in source chain.
    uint256 public compensationRate;
    // Gas fee compensation rate precision.(100%)
    uint256 public constant COMPENSATION_PRECISION = 1e5;
    // Max compensation rate(1000%)
    uint256 public constant MAX_COMPENSATION_RATE = 10e5;
    // Minimize compensation rate(10%)
    uint256 public constant MIN_COMPENSATION_RATE = 1e4;
    // Small BNB change for the new user in BSC chain.
    uint256 public BNB_CHANGE = 0.005 ether;
    // ETH/BNB price exchange rate precison
    uint256 public constant EXCHANGE_RATE_PRECISION = 1e12;
    // BSC chain ID (Dest chainId)
    uint64 public immutable BSC_CHAIN_ID;

    // oracle data feeds
    mapping(Feeds => AggregatorV3Interface) public oracle;
    // oracle data feeds update time buffer
    mapping(Feeds => uint256) public oracleUpdateBuffer;
    // user pool nonce info(account => (pid => nonce))
    mapping(address => mapping(uint256 => uint64)) public nonces;
    // whether user send 1st cross-chain tx.
    mapping(address => bool) public is1st;
    // different message(operation) type have different estimate gas limit on EVM chain.
    mapping(Chains => mapping(DataTypes.MessageTypes => uint256)) public gaslimits;

    event NewOracle(address oracle);
    event VaultUpdated(address vault);
    event ReceiverUpdated(address receiver);
    event BnbChangeUpdated(uint256 amount);
    event CompensationRateUpdated(uint256 rate);
    event FeeClaimed(uint256 amount, bool success);
    event CreateProxyGasLimitUpdated(uint256 gaslimit);
    event OracleBufferUpdated(Feeds feed, uint256 oracleUpdateBuffer);
    event GasLimitUpdated(Chains chain, DataTypes.MessageTypes msgtype, uint256 gaslimit);
    event FarmingMessageReceived(
        address sender,
        uint64 srcChainId,
        uint64 nonce,
        DataTypes.MessageTypes msgType,
        address acount,
        uint256 pid,
        uint256 amount
    );

    constructor(
        address _messageBus,
        address _oracle_bnb,
        address _oracle_eth,
        uint256 _oracle_bnb_update_buffer,
        uint256 _oracle_eth_update_buffer,
        uint64 _chainId
    ) {
        // Dummy check oracle
        AggregatorV3Interface(_oracle_bnb).latestRoundData();
        AggregatorV3Interface(_oracle_eth).latestRoundData();

        messageBus = _messageBus;

        oracle[Feeds.BNBUSD] = AggregatorV3Interface(_oracle_bnb);
        oracle[Feeds.ETHUSD] = AggregatorV3Interface(_oracle_eth);

        oracleUpdateBuffer[Feeds.BNBUSD] = _oracle_bnb_update_buffer;
        oracleUpdateBuffer[Feeds.ETHUSD] = _oracle_eth_update_buffer;
        // initially, compensation rate is 100%
        compensationRate = COMPENSATION_PRECISION;
        BSC_CHAIN_ID = _chainId;
    }

    modifier onlyVault() {
        require(msg.sender == Vault, "Only vault contract");
        _;
    }

    /**
     * @notice Only called by Vault contract.
     * @param _message Encoded CrossFarmingRequest message bytes.
     */
    function sendFarmMessage(bytes calldata _message) external payable onlyVault {
        // decode the message
        DataTypes.CrossFarmRequest memory request = abi.decode((_message), (DataTypes.CrossFarmRequest));

        // ETH/USD price
        int256 ethPrice = _getPriceFromOracle(Feeds.ETHUSD);
        // BNB/USD price
        int256 bnbPrice = _getPriceFromOracle(Feeds.BNBUSD);

        require(bnbPrice > 0 && ethPrice > 0, "Abnormal prices");

        uint256 exchangeRate = (uint256(bnbPrice) * EXCHANGE_RATE_PRECISION) / uint256(ethPrice);
        // msgbus fee price by native token
        uint256 msgBusFee = IMessageBus(messageBus).calcFee(_message);

        uint256 totalFee = msgBusFee +
            // destTxFee
            (tx.gasprice *
                estimateGaslimit(Chains.BSC, request.account, request.msgType) *
                exchangeRate *
                compensationRate) /
            (EXCHANGE_RATE_PRECISION * COMPENSATION_PRECISION);

        // BNB change fee for new BNB user
        if (!is1st[request.account]) {
            totalFee += (BNB_CHANGE * exchangeRate) / EXCHANGE_RATE_PRECISION;
            is1st[request.account] = true;
        }

        if (request.msgType >= DataTypes.MessageTypes.Withdraw) {
            totalFee += (// executor call fee(Ack call on this contract 'executeMessage' interface)
            tx.gasprice *
                estimateGaslimit(Chains.EVM, request.account, request.msgType) +
                // withdraw ack msg messageBus fee on BSC chain
                ((msgBusFee * exchangeRate) / EXCHANGE_RATE_PRECISION));
        }

        require(msg.value >= totalFee, "Insufficient fee");

        IMessageBus(messageBus).sendMessage{value: msgBusFee}(request.receiver, request.dstChainId, _message);

        // increase nonce
        ++nonces[request.account][request.pid];

        if (msg.value > totalFee) {
            //send back to the user
            payable(request.account).transfer(msg.value - totalFee);
        }
    }

    /**
     * @notice Only called by MessageBus
     * @param _sender The address of the source app contract
     * @param _srcChainId The source chain ID where the transfer is originated from
     * @param _message Encoded CrossFarmingRequest message bytes.
     */
    function executeMessage(
        address _sender,
        uint64 _srcChainId,
        bytes calldata _message,
        address // executor who called the MessageBus execution function
    ) external payable override onlyMessageBus returns (ExecutionStatus) {
        require(_srcChainId == BSC_CHAIN_ID && _sender == CROSS_FARMING_RECEIVER, "Invalid receiver contract");
        // decode the message
        DataTypes.CrossFarmRequest memory request = abi.decode((_message), (DataTypes.CrossFarmRequest));

        if (request.msgType == DataTypes.MessageTypes.Withdraw) {
            IVault(Vault).ackWithdraw(request.account, request.pid, request.amount, request.nonce);
        } else if (request.msgType == DataTypes.MessageTypes.EmergencyWithdraw) {
            IVault(Vault).ackEmergencyWithdraw(request.account, request.pid, request.nonce);
        }

        emit FarmingMessageReceived(
            _sender,
            _srcChainId,
            request.nonce,
            request.msgType,
            request.account,
            request.pid,
            request.amount
        );

        return ExecutionStatus.Success;
    }

    /// set cross farming vault contract on source chain.
    /// @notice only be set once.
    function setVault(address _vault) external onlyOwner {
        require(_vault != address(0), "Vault contract can't be zero address");
        require(Vault == address(0), "Already set vault contract");
        Vault = _vault;

        emit VaultUpdated(Vault);
    }

    /// set cross farming receiver contract on dest chain(BSC chain).
    /// @notice only be set once.
    function setReceiver(address _receiver) external onlyOwner {
        require(_receiver != address(0), "Receiver contract can't be zero address");
        require(CROSS_FARMING_RECEIVER == address(0), "Already set receiver contract");
        CROSS_FARMING_RECEIVER = _receiver;

        emit ReceiverUpdated(_receiver);
    }

    /// set oracle data feeds.
    function setOracle(Feeds _feed, address _oracle) external onlyOwner {
        require(_oracle != address(0), "Oracle feed can't be zero address");
        oracle[_feed] = AggregatorV3Interface(_oracle);

        // Dummy check to make sure the interface implements this function properly
        oracle[_feed].latestRoundData();

        emit NewOracle(_oracle);
    }

    /// set oracle update buffer, different oracle feeds have different update frequency,
    /// so the buffer should also change accordingly
    function setOracleUpdateBuffer(Feeds _feed, uint256 _oracleUpdateBuffer) external onlyOwner {
        require(_oracleUpdateBuffer > 0, "oracle update time buffer should > 0");
        oracleUpdateBuffer[_feed] = _oracleUpdateBuffer;
        emit OracleBufferUpdated(_feed, _oracleUpdateBuffer);
    }

    /// set gas cost for specific operation in different chain.
    function setGaslimits(
        Chains _chain,
        DataTypes.MessageTypes _type,
        uint256 _gaslimit
    ) external onlyOwner {
        require(_gaslimit > 0, "Gaslimit should be > zero");
        gaslimits[_chain][_type] = _gaslimit;
        emit GasLimitUpdated(_chain, _type, _gaslimit);
    }

    /// @notice gas price and gas limit is different in differenct EVM chain, compensation rate
    /// is for hedging the risk of this difference caused the executor signer lose gas fee in execution
    function setCompensationRate(uint256 _rate) external onlyOwner {
        require(_rate >= MIN_COMPENSATION_RATE && _rate <= MAX_COMPENSATION_RATE, "Invalid compensation rate");
        compensationRate = _rate;
        emit CompensationRateUpdated(compensationRate);
    }

    /// set BNB change amount for new BSC chain user.
    function setBnbChange(uint256 _change) external onlyOwner {
        require(_change > 0, "BNB change for new user should greater than zero");
        BNB_CHANGE = _change;
        emit BnbChangeUpdated(_change);
    }

    /// create farming-proxy contract gas limit cost in BSC chain.
    function setCreateProxyGasLimit(uint256 _gaslimit) external onlyOwner {
        createProxyGasLimit = _gaslimit;
        emit CreateProxyGasLimitUpdated(_gaslimit);
    }

    /// estimate different operation consume gas limit in BSC chain.
    function estimateGaslimit(
        Chains _chain,
        address _account,
        DataTypes.MessageTypes _msgType
    ) public view returns (uint256 gaslimit) {
        gaslimit = gaslimits[_chain][_msgType];
        // 1st cross-chain tx should add create proxy gaslimit.
        if (!is1st[_account] && _chain == Chains.BSC) gaslimit += createProxyGasLimit;
    }

    /// transfer any ERC20 token of current contract to owner.
    function drainToken(address _token, uint256 _amount) external onlyOwner {
        IERC20(_token).safeTransfer(msg.sender, _amount);
    }

    /// send cross-chain sender contract all gas token to owner
    function claimFee(uint256 _gas) external onlyOwner {
        require(_gas >= 2300, "claimFee gaslimit should exceed 2300 ");

        uint256 amount = address(this).balance;
        (bool success, ) = msg.sender.call{value: amount, gas: _gas}("");

        emit FeeClaimed(amount, success);
    }

    /// @notice Get latest oracle price from chainlink.
    function _getPriceFromOracle(Feeds _feed) internal view returns (int256) {
        (, int256 price, , uint256 timestamp, ) = oracle[_feed].latestRoundData();
        require(timestamp + oracleUpdateBuffer[_feed] >= block.timestamp, "out of date oracle data");
        return price;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;

library DataTypes {
    enum MessageTypes {
        Deposit,
        Withdraw,
        EmergencyWithdraw
    }

    struct CrossFarmRequest {
        address receiver;
        uint64 dstChainId;
        uint64 nonce;
        address account;
        uint256 pid;
        uint256 amount;
        MessageTypes msgType;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;

interface IVault {
    function ackWithdraw(
        address _user,
        uint256 _pid,
        uint256 _amount,
        uint64 _nonce
    ) external;

    function ackEmergencyWithdraw(
        address _user,
        uint256 _pid,
        uint64 _nonce
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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");
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface AggregatorV3Interface {

  function decimals()
    external
    view
    returns (
      uint8
    );

  function description()
    external
    view
    returns (
      string memory
    );

  function version()
    external
    view
    returns (
      uint256
    );

  // getRoundData and latestRoundData should both raise "No data present"
  // if they do not have data to report, instead of returning unset values
  // which could be misinterpreted as actual reported values.
  function getRoundData(
    uint80 _roundId
  )
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

  function latestRoundData()
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.8.0;

import "../libraries/MsgDataTypes.sol";

interface IMessageBus {
    function liquidityBridge() external view returns (address);

    function pegBridge() external view returns (address);

    function pegBridgeV2() external view returns (address);

    function pegVault() external view returns (address);

    function pegVaultV2() external view returns (address);

    /**
     * @notice Calculates the required fee for the message.
     * @param _message Arbitrary message bytes to be decoded by the destination app contract.
     @ @return The required fee.
     */
    function calcFee(bytes calldata _message) external view returns (uint256);

    /**
     * @notice Sends a message to an app on another chain via MessageBus without an associated transfer.
     * A fee is charged in the native gas token.
     * @param _receiver The address of the destination app contract.
     * @param _dstChainId The destination chain ID.
     * @param _message Arbitrary message bytes to be decoded by the destination app contract.
     */
    function sendMessage(
        address _receiver,
        uint256 _dstChainId,
        bytes calldata _message
    ) external payable;

    /**
     * @notice Sends a message associated with a transfer to an app on another chain via MessageBus without an associated transfer.
     * A fee is charged in the native token.
     * @param _receiver The address of the destination app contract.
     * @param _dstChainId The destination chain ID.
     * @param _srcBridge The bridge contract to send the transfer with.
     * @param _srcTransferId The transfer ID.
     * @param _dstChainId The destination chain ID.
     * @param _message Arbitrary message bytes to be decoded by the destination app contract.
     */
    function sendMessageWithTransfer(
        address _receiver,
        uint256 _dstChainId,
        address _srcBridge,
        bytes32 _srcTransferId,
        bytes calldata _message
    ) external payable;

    /**
     * @notice Withdraws message fee in the form of native gas token.
     * @param _account The address receiving the fee.
     * @param _cumulativeFee The cumulative fee credited to the account. Tracked by SGN.
     * @param _sigs The list of signatures sorted by signing addresses in ascending order. A withdrawal must be
     * signed-off by +2/3 of the sigsVerifier's current signing power to be delivered.
     * @param _signers The sorted list of signers.
     * @param _powers The signing powers of the signers.
     */
    function withdrawFee(
        address _account,
        uint256 _cumulativeFee,
        bytes[] calldata _sigs,
        address[] calldata _signers,
        uint256[] calldata _powers
    ) external;

    /**
     * @notice Execute a message with a successful transfer.
     * @param _message Arbitrary message bytes originated from and encoded by the source app contract
     * @param _transfer The transfer info.
     * @param _sigs The list of signatures sorted by signing addresses in ascending order. A relay must be signed-off by
     * +2/3 of the sigsVerifier's current signing power to be delivered.
     * @param _signers The sorted list of signers.
     * @param _powers The signing powers of the signers.
     */
    function executeMessageWithTransfer(
        bytes calldata _message,
        MsgDataTypes.TransferInfo calldata _transfer,
        bytes[] calldata _sigs,
        address[] calldata _signers,
        uint256[] calldata _powers
    ) external payable;

    /**
     * @notice Execute a message with a refunded transfer.
     * @param _message Arbitrary message bytes originated from and encoded by the source app contract
     * @param _transfer The transfer info.
     * @param _sigs The list of signatures sorted by signing addresses in ascending order. A relay must be signed-off by
     * +2/3 of the sigsVerifier's current signing power to be delivered.
     * @param _signers The sorted list of signers.
     * @param _powers The signing powers of the signers.
     */
    function executeMessageWithTransferRefund(
        bytes calldata _message, // the same message associated with the original transfer
        MsgDataTypes.TransferInfo calldata _transfer,
        bytes[] calldata _sigs,
        address[] calldata _signers,
        uint256[] calldata _powers
    ) external payable;

    /**
     * @notice Execute a message not associated with a transfer.
     * @param _message Arbitrary message bytes originated from and encoded by the source app contract
     * @param _sigs The list of signatures sorted by signing addresses in ascending order. A relay must be signed-off by
     * +2/3 of the sigsVerifier's current signing power to be delivered.
     * @param _signers The sorted list of signers.
     * @param _powers The signing powers of the signers.
     */
    function executeMessage(
        bytes calldata _message,
        MsgDataTypes.RouteInfo calldata _route,
        bytes[] calldata _sigs,
        address[] calldata _signers,
        uint256[] calldata _powers
    ) external payable;
}

// SPDX-License-Identifier: GPL-3.0-only

pragma solidity 0.8.9;

import "../interfaces/IMessageReceiverApp.sol";
import "./MessageBusAddress.sol";

abstract contract MessageReceiverApp is IMessageReceiverApp, MessageBusAddress {
    modifier onlyMessageBus() {
        require(msg.sender == messageBus, "caller is not message bus");
        _;
    }

    /**
     * @notice Called by MessageBus (MessageBusReceiver) if the process is originated from MessageBus (MessageBusSender)'s
     *         sendMessageWithTransfer it is only called when the tokens are checked to be arrived at this contract's address.
     * @param _sender The address of the source app contract
     * @param _token The address of the token that comes out of the bridge
     * @param _amount The amount of tokens received at this contract through the cross-chain bridge.
     *        the contract that implements this contract can safely assume that the tokens will arrive before this
     *        function is called.
     * @param _srcChainId The source chain ID where the transfer is originated from
     * @param _message Arbitrary message bytes originated from and encoded by the source app contract
     * @param _executor Address who called the MessageBus execution function
     */
    function executeMessageWithTransfer(
        address _sender,
        address _token,
        uint256 _amount,
        uint64 _srcChainId,
        bytes calldata _message,
        address _executor
    ) external payable virtual override onlyMessageBus returns (ExecutionStatus) {}

    /**
     * @notice Only called by MessageBus (MessageBusReceiver) if
     *         1. executeMessageWithTransfer reverts, or
     *         2. executeMessageWithTransfer returns ExecutionStatus.Fail
     * @param _sender The address of the source app contract
     * @param _token The address of the token that comes out of the bridge
     * @param _amount The amount of tokens received at this contract through the cross-chain bridge.
     *        the contract that implements this contract can safely assume that the tokens will arrive before this
     *        function is called.
     * @param _srcChainId The source chain ID where the transfer is originated from
     * @param _message Arbitrary message bytes originated from and encoded by the source app contract
     * @param _executor Address who called the MessageBus execution function
     */
    function executeMessageWithTransferFallback(
        address _sender,
        address _token,
        uint256 _amount,
        uint64 _srcChainId,
        bytes calldata _message,
        address _executor
    ) external payable virtual override onlyMessageBus returns (ExecutionStatus) {}

    /**
     * @notice Called by MessageBus (MessageBusReceiver) to process refund of the original transfer from this contract
     * @param _token The token address of the original transfer
     * @param _amount The amount of the original transfer
     * @param _message The same message associated with the original transfer
     * @param _executor Address who called the MessageBus execution function
     */
    function executeMessageWithTransferRefund(
        address _token,
        uint256 _amount,
        bytes calldata _message,
        address _executor
    ) external payable virtual override onlyMessageBus returns (ExecutionStatus) {}

    /**
     * @notice Called by MessageBus (MessageBusReceiver)
     * @param _sender The address of the source app contract
     * @param _srcChainId The source chain ID where the transfer is originated from
     * @param _message Arbitrary message bytes originated from and encoded by the source app contract
     * @param _executor Address who called the MessageBus execution function
     */
    function executeMessage(
        address _sender,
        uint64 _srcChainId,
        bytes calldata _message,
        address _executor
    ) external payable virtual override onlyMessageBus returns (ExecutionStatus) {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts 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);
}

// SPDX-License-Identifier: GPL-3.0-only

pragma solidity 0.8.9;

library MsgDataTypes {
    // bridge operation type at the sender side (src chain)
    enum BridgeSendType {
        Null,
        Liquidity,
        PegDeposit,
        PegBurn,
        PegV2Deposit,
        PegV2Burn,
        PegV2BurnFrom
    }

    // bridge operation type at the receiver side (dst chain)
    enum TransferType {
        Null,
        LqRelay, // relay through liquidity bridge
        LqWithdraw, // withdraw from liquidity bridge
        PegMint, // mint through pegged token bridge
        PegWithdraw, // withdraw from original token vault
        PegV2Mint, // mint through pegged token bridge v2
        PegV2Withdraw // withdraw from original token vault v2
    }

    enum MsgType {
        MessageWithTransfer,
        MessageOnly
    }

    enum TxStatus {
        Null,
        Success,
        Fail,
        Fallback,
        Pending // transient state within a transaction
    }

    struct TransferInfo {
        TransferType t;
        address sender;
        address receiver;
        address token;
        uint256 amount;
        uint64 wdseq; // only needed for LqWithdraw (refund)
        uint64 srcChainId;
        bytes32 refId;
        bytes32 srcTxHash; // src chain msg tx hash
    }

    struct RouteInfo {
        address sender;
        address receiver;
        uint64 srcChainId;
        bytes32 srcTxHash; // src chain msg tx hash
    }

    struct MsgWithTransferExecutionParams {
        bytes message;
        TransferInfo transfer;
        bytes[] sigs;
        address[] signers;
        uint256[] powers;
    }

    struct BridgeTransferParams {
        bytes request;
        bytes[] sigs;
        address[] signers;
        uint256[] powers;
    }
}

// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.8.0;

interface IMessageReceiverApp {
    enum ExecutionStatus {
        Fail, // execution failed, finalized
        Success, // execution succeeded, finalized
        Retry // execution rejected, can retry later
    }

    /**
     * @notice Called by MessageBus (MessageBusReceiver) if the process is originated from MessageBus (MessageBusSender)'s
     *         sendMessageWithTransfer it is only called when the tokens are checked to be arrived at this contract's address.
     * @param _sender The address of the source app contract
     * @param _token The address of the token that comes out of the bridge
     * @param _amount The amount of tokens received at this contract through the cross-chain bridge.
     *        the contract that implements this contract can safely assume that the tokens will arrive before this
     *        function is called.
     * @param _srcChainId The source chain ID where the transfer is originated from
     * @param _message Arbitrary message bytes originated from and encoded by the source app contract
     * @param _executor Address who called the MessageBus execution function
     */
    function executeMessageWithTransfer(
        address _sender,
        address _token,
        uint256 _amount,
        uint64 _srcChainId,
        bytes calldata _message,
        address _executor
    ) external payable returns (ExecutionStatus);

    /**
     * @notice Only called by MessageBus (MessageBusReceiver) if
     *         1. executeMessageWithTransfer reverts, or
     *         2. executeMessageWithTransfer returns ExecutionStatus.Fail
     * @param _sender The address of the source app contract
     * @param _token The address of the token that comes out of the bridge
     * @param _amount The amount of tokens received at this contract through the cross-chain bridge.
     *        the contract that implements this contract can safely assume that the tokens will arrive before this
     *        function is called.
     * @param _srcChainId The source chain ID where the transfer is originated from
     * @param _message Arbitrary message bytes originated from and encoded by the source app contract
     * @param _executor Address who called the MessageBus execution function
     */
    function executeMessageWithTransferFallback(
        address _sender,
        address _token,
        uint256 _amount,
        uint64 _srcChainId,
        bytes calldata _message,
        address _executor
    ) external payable returns (ExecutionStatus);

    /**
     * @notice Called by MessageBus (MessageBusReceiver) to process refund of the original transfer from this contract
     * @param _token The token address of the original transfer
     * @param _amount The amount of the original transfer
     * @param _message The same message associated with the original transfer
     * @param _executor Address who called the MessageBus execution function
     */
    function executeMessageWithTransferRefund(
        address _token,
        uint256 _amount,
        bytes calldata _message,
        address _executor
    ) external payable returns (ExecutionStatus);

    /**
     * @notice Called by MessageBus (MessageBusReceiver)
     * @param _sender The address of the source app contract
     * @param _srcChainId The source chain ID where the transfer is originated from
     * @param _message Arbitrary message bytes originated from and encoded by the source app contract
     * @param _executor Address who called the MessageBus execution function
     */
    function executeMessage(
        address _sender,
        uint64 _srcChainId,
        bytes calldata _message,
        address _executor
    ) external payable returns (ExecutionStatus);
}

// SPDX-License-Identifier: GPL-3.0-only

pragma solidity 0.8.9;

import "../../safeguard/Ownable.sol";

abstract contract MessageBusAddress is Ownable {
    event MessageBusUpdated(address messageBus);

    address public messageBus;

    function setMessageBus(address _messageBus) public onlyOwner {
        messageBus = _messageBus;
        emit MessageBusUpdated(messageBus);
    }
}

// SPDX-License-Identifier: GPL-3.0-only

pragma solidity ^0.8.0;

/**
 * @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.
 *
 * This adds a normal func that setOwner if _owner is address(0). So we can't allow
 * renounceOwnership. So we can support Proxy based upgradable contract
 */
abstract contract Ownable {
    address private _owner;

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

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

    /**
     * @dev Only to be called by inherit contracts, in their init func called by Proxy
     * we require _owner == address(0), which is only possible when it's a delegateCall
     * because constructor sets _owner in contract state.
     */
    function initOwner() internal {
        require(_owner == address(0), "owner already set");
        _setOwner(msg.sender);
    }

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

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

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

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

{
  "optimizer": {
    "enabled": true,
    "runs": 99999
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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AggregatorV3Interface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"enum CrossFarmingSender.Feeds","name":"","type":"uint8"}],"name":"oracleUpdateBuffer","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"_message","type":"bytes"}],"name":"sendFarmMessage","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_change","type":"uint256"}],"name":"setBnbChange","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_rate","type":"uint256"}],"name":"setCompensationRate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_gaslimit","type":"uint256"}],"name":"setCreateProxyGasLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"enum CrossFarmingSender.Chains","name":"_chain","type":"uint8"},{"internalType":"enum DataTypes.MessageTypes","name":"_type","type":"uint8"},{"internalType":"uint256","name":"_gaslimit","type":"uint256"}],"name":"setGaslimits","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_messageBus","type":"address"}],"name":"setMessageBus","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"enum CrossFarmingSender.Feeds","name":"_feed","type":"uint8"},{"internalType":"address","name":"_oracle","type":"address"}],"name":"setOracle","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"enum 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0000000000000000000000004066d196a423b2b3b8b054f4f40efb47a74e200c00000000000000000000000014e613ac84a31f709eadbdf89c6cc390fdc9540a0000000000000000000000005f4ec3df9cbd43714fe2740f5e3616155c5b8419000000000000000000000000000000000000000000000000000000000001518000000000000000000000000000000000000000000000000000000000000151800000000000000000000000000000000000000000000000000000000000000038

-----Decoded View---------------
Arg [0] : _messageBus (address): 0x4066D196A423b2b3B8B054f4F40efB47a74E200C
Arg [1] : _oracle_bnb (address): 0x14e613AC84a31f709eadbdF89C6CC390fDc9540A
Arg [2] : _oracle_eth (address): 0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419
Arg [3] : _oracle_bnb_update_buffer (uint256): 86400
Arg [4] : _oracle_eth_update_buffer (uint256): 86400
Arg [5] : _chainId (uint64): 56

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 0000000000000000000000004066d196a423b2b3b8b054f4f40efb47a74e200c
Arg [1] : 00000000000000000000000014e613ac84a31f709eadbdf89c6cc390fdc9540a
Arg [2] : 0000000000000000000000005f4ec3df9cbd43714fe2740f5e3616155c5b8419
Arg [3] : 0000000000000000000000000000000000000000000000000000000000015180
Arg [4] : 0000000000000000000000000000000000000000000000000000000000015180
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000038