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Outline

•    - function _msgSender()
• library SafeMath
•    - function add(uint256 a, uint256 b)
•    - function sub(uint256 a, uint256 b)
•    - function sub(
•    - function mul(uint256 a, uint256 b)
•    - function div(uint256 a, uint256 b)
•    - function div(
•  contract Ownable is Context
•    - function owner()
•    - function renounceOwnership()
•    - function transferOwnership(address ne ...
•    - function decimals()
•    - function name()
•    - function symbol()
• library TransferHelper
•    - function safeApprove(
•    - function safeTransfer(
•    - function safeTransferFrom(
•    - function safeTransferETH(address to, ...
•  contract BridgeBase is Context, Ow ... *
•    - function setBridgeFee(uint256 bridgeF ...
•    - function getBridgeFee()
•    - function setSystem(address _system)
•    - function setProcessedFess(uint256 cha ...
•    - function getProcessedFees(uint256 cha ...
•    - function getBridgeStatus(uint256 nonc ...
•    - function updateBridgingStaus(bool pau ...
•    - function swap(uint256 amount, uint256 ...
•    - function feeCalculation(uint256 amoun ...
•    - function swapBack(

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/**
 *Submitted for verification at Etherscan.io on 2021-10-26
*/

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2020 reflect.finance. ALL RIGHTS RESERVED.
 */

pragma solidity ^0.8.4;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
}

library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;

        return c;
    }
}

contract Ownable is Context {
    address private _owner;

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

    constructor() {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    function owner() public view returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}


abstract contract IERC20 {
    function decimals() external view virtual returns (uint8);

    function name() external view virtual returns (string memory);

    function symbol() external view virtual returns (string memory);
}

library TransferHelper {
    function safeApprove(
        address token,
        address to,
        uint256 value
    ) internal {
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(0x095ea7b3, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "TransferHelper: APPROVE_FAILED"
        );
    }

    function safeTransfer(
        address token,
        address to,
        uint256 value
    ) internal {
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(0xa9059cbb, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "TransferHelper: TRANSFER_FAILED"
        );
    }

    function safeTransferFrom(
        address token,
        address from,
        address to,
        uint256 value
    ) internal {
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(0x23b872dd, from, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "TransferHelper: TRANSFER_FROM_FAILED"
        );
    }

    function safeTransferETH(address to, uint256 value) internal {
        (bool success, ) = to.call{value: value}(new bytes(0));
        require(success, "TransferHelper: ETH_TRANSFER_FAILED");
    }
}

contract BridgeBase is Context, Ownable {
    using SafeMath for uint256;

    mapping(uint256 => uint256) private _nonces;
    
    mapping(uint256 => mapping(uint256 => bool)) private nonceProcessed;
    mapping(uint256 => uint256) private _processedFees;
    uint256 private _bridgeFee = 3;
    bool public _isBridgingPaused = false;


    address shih;
    address system;
    address bridgeFeesAddress = address(0xD378dBeD86689D0dBA19Ca2bab322B6f23765288);

    event SwapRequest(
        address indexed to,
        uint256 amount,
        uint256 nonce,
        uint256 toChainID
    );


    modifier onlySystem() {
        require(system == _msgSender(), "Ownable: caller is not the system");
        _;
    }

    modifier bridgingPaused() {
        require(!_isBridgingPaused, "the bridging is paused");
        _;
    }

    constructor(
        address _shih,
        address _system
    ) {
        shih = _shih;
        system = _system;
        //   initializing processed fees
        _processedFees[56] = 0.001 ether;
    }


    /**
     * @dev Function for setting mint fee by owner
     * @param bridgeFee Bridge Fee
     */
    function setBridgeFee(uint256 bridgeFee) external onlyOwner returns (bool) {
        require(bridgeFee > 0, "Invalid Percentage");
        _bridgeFee = bridgeFee;
        return true;
    }

    function getBridgeFee() external view returns (uint256) {
        return _bridgeFee;
    }

    function setSystem(address _system) external onlyOwner returns (bool) {
        system = _system;
        return true;
    }

    //   function isBlacklisted(address account) external view returns(bool) {
    //       return _blacklisted[account];
    //   }

    function setProcessedFess(uint256 chainID, uint256 processedFees)
        external
        onlyOwner
    {
        _processedFees[chainID] = processedFees;
    }
    
    function getProcessedFees(uint256 chainID) external view returns(uint256){
        return _processedFees[chainID];
    }

    function getBridgeStatus(uint256 nonce, uint256 fromChainID)
        external
        view
        returns (bool)
    {
        return nonceProcessed[fromChainID][nonce];
    }


    function updateBridgingStaus(bool paused) external onlyOwner {
        _isBridgingPaused = paused;
    }


    function swap(uint256 amount, uint256 toChainID)
        external
        payable
        bridgingPaused
    {
        require(
            msg.value >= _processedFees[toChainID],
            "Insufficient processed fees"
        );
        uint256 _nonce = _nonces[toChainID];
        _nonce = _nonce.add(1);
        _nonces[toChainID] = _nonce;
        TransferHelper.safeTransferFrom(
            shih,
            _msgSender(),
            address(this),
            amount
        );
        payable(system).transfer(msg.value);
        emit SwapRequest(_msgSender(), amount, _nonce, toChainID);
    }

    function feeCalculation(uint256 amount) public view returns (uint256) {
        uint256 _amountAfterFee = (amount - (amount.mul(_bridgeFee) / 1000));
        return _amountAfterFee;
    }

    function swapBack(
        address to,
        uint256 amount,
        uint256 nonce,
        uint256 fromChainID
    ) external onlySystem {
        require(
            !nonceProcessed[fromChainID][nonce],
            "Swap is already proceeds"
        );
        nonceProcessed[fromChainID][nonce] = true;

        uint256 temp = feeCalculation(amount);
        uint256 fees = amount.sub(temp);

        TransferHelper.safeTransfer(shih, bridgeFeesAddress, fees);

        TransferHelper.safeTransfer(shih, to, temp);
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_shih","type":"address"},{"internalType":"address","name":"_system","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"nonce","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"toChainID","type":"uint256"}],"name":"SwapRequest","type":"event"},{"inputs":[],"name":"_isBridgingPaused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"feeCalculation","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getBridgeFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"fromChainID","type":"uint256"}],"name":"getBridgeStatus","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"chainID","type":"uint256"}],"name":"getProcessedFees","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":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"bridgeFee","type":"uint256"}],"name":"setBridgeFee","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"chainID","type":"uint256"},{"internalType":"uint256","name":"processedFees","type":"uint256"}],"name":"setProcessedFess","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_system","type":"address"}],"name":"setSystem","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"toChainID","type":"uint256"}],"name":"swap","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"fromChainID","type":"uint256"}],"name":"swapBack","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"paused","type":"bool"}],"name":"updateBridgingStaus","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000841fb148863454a3b3570f515414759be9091465000000000000000000000000cbee3a4ce1725efbaa9c213d1839d5f462a96486

-----Decoded View---------------
Arg [0] : _shih (address): 0x841FB148863454A3b3570f515414759BE9091465
Arg [1] : _system (address): 0xcbEe3a4cE1725efBAa9c213d1839D5F462A96486

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000841fb148863454a3b3570f515414759be9091465
Arg [1] : 000000000000000000000000cbee3a4ce1725efbaa9c213d1839d5f462a96486

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