{"Bridgers.sol":{"content":"// SPDX-License-Identifier: MIT\r\n\r\npragma solidity ^0.8.0;\r\n\r\nimport \"./IERC20.sol\";\r\nimport \"./Ownable.sol\";\r\nimport \"./ReentrancyGuard.sol\";\r\nimport \"./SafeMath.sol\";\r\nimport \"./TransferHelper.sol\";\r\n\r\n\r\ncontract Bridgers is ReentrancyGuard, Ownable {\r\n    using SafeMath for uint256;\r\n\r\n    string public name;\r\n\r\n    string public symbol;\r\n\r\n    event Swap(\r\n        address fromToken,\r\n        string toToken,\r\n        address sender,\r\n        string destination,\r\n        uint256 fromAmount,\r\n        uint256 minReturnAmount\r\n    );\r\n\r\n\r\n    event SwapEth(\r\n        string toToken,\r\n        address sender,\r\n        string destination,\r\n        uint256 fromAmount,\r\n        uint256 minReturnAmount\r\n    );\r\n\r\n    event WithdrawETH(uint256 amount);\r\n\r\n    event Withdtraw(address token, uint256 amount);\r\n\r\n    constructor() {\r\n        name = \"Bridgers1.1\";\r\n        symbol = \"Bridgers\";\r\n    }\r\n\r\n\r\n    function swap(\r\n        address fromToken,\r\n        string memory toToken,\r\n        string memory destination,\r\n        uint256 fromAmount,\r\n        uint256 minReturnAmount\r\n    ) external nonReentrant {\r\n        require(fromToken != address(0), \"FROMTOKEN_CANT_T_BE_0\");\r\n        require(fromAmount \u003e 0, \"FROM_TOKEN_AMOUNT_MUST_BE_MORE_THAN_0\");\r\n        uint256 _inputAmount;\r\n        uint256 _fromTokenBalanceOrigin = IERC20(fromToken).balanceOf(address(this));\r\n        TransferHelper.safeTransferFrom(fromToken, msg.sender, address(this), fromAmount);\r\n        uint256 _fromTokenBalanceNew = IERC20(fromToken).balanceOf(address(this));\r\n        _inputAmount = _fromTokenBalanceNew.sub(_fromTokenBalanceOrigin);\r\n        require(_inputAmount \u003e 0, \"NO_FROM_TOKEN_TRANSFER_TO_THIS_CONTRACT\");\r\n        emit Swap(fromToken, toToken, msg.sender, destination, fromAmount, minReturnAmount);\r\n    }\r\n\r\n\r\n    function swapEth(string memory toToken, string memory destination, uint256 minReturnAmount\r\n    ) external payable nonReentrant {\r\n        uint256 _ethAmount = msg.value;\r\n        require(_ethAmount \u003e 0, \"ETH_AMOUNT_MUST_BE_MORE_THAN_0\");\r\n        emit SwapEth(toToken, msg.sender, destination, _ethAmount, minReturnAmount);\r\n    }\r\n\r\n    function withdrawETH(address destination, uint256 amount) external onlyOwner {\r\n        require(destination != address(0), \"DESTINATION_CANNT_BE_0_ADDRESS\");\r\n        uint256 balance = address(this).balance;\r\n        require(balance \u003e= amount, \"AMOUNT_CANNT_MORE_THAN_BALANCE\");\r\n        TransferHelper.safeTransferETH(destination, amount);\r\n        emit WithdrawETH(amount);\r\n    }\r\n\r\n    function withdraw(address token, address destination, uint256 amount) external onlyOwner {\r\n        require(destination != address(0), \"DESTINATION_CANNT_BE_0_ADDRESS\");\r\n        require(token != address(0), \"TOKEN_MUST_NOT_BE_0\");\r\n        uint256 balance = IERC20(token).balanceOf(address(this));\r\n        require(balance \u003e= amount, \"AMOUNT_CANNT_MORE_THAN_BALANCE\");\r\n        TransferHelper.safeTransfer(token, destination, amount);\r\n        emit Withdtraw(token, amount);\r\n    }\r\n\r\n    receive() external payable {}\r\n}"},"Context.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n  function _msgSender() internal view virtual returns (address) {\n    return msg.sender;\n  }\n\n  function _msgData() internal view virtual returns (bytes calldata) {\n    return msg.data;\n  }\n}\n"},"IERC20.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n    /**\n     * @dev Returns the amount of tokens in existence.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of tokens owned by `account`.\n     */\n    function balanceOf(address account) external view returns (uint256);\n\n    /**\n     * @dev Moves `amount` tokens from the caller\u0027s account to `recipient`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address recipient, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Returns the remaining number of tokens that `spender` will be\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\n     * zero by default.\n     *\n     * This value changes when {approve} or {transferFrom} are called.\n     */\n    function allowance(address owner, address spender) external view returns (uint256);\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the caller\u0027s tokens.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\n     * that someone may use both the old and the new allowance by unfortunate\n     * transaction ordering. One possible solution to mitigate this race\n     * condition is to first reduce the spender\u0027s allowance to 0 and set the\n     * desired value afterwards:\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address spender, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Moves `amount` tokens from `sender` to `recipient` using the\n     * allowance mechanism. `amount` is then deducted from the caller\u0027s\n     * allowance.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address sender,\n        address recipient,\n        uint256 amount\n    ) external returns (bool);\n\n    /**\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\n     * another (`to`).\n     *\n     * Note that `value` may be zero.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    /**\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n     * a call to {approve}. `value` is the new allowance.\n     */\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n"},"Ownable.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\nimport \"./Context.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n  address private _owner;\n\n  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n  /**\n   * @dev Initializes the contract setting the deployer as the initial owner.\n     */\n  constructor() {\n    _setOwner(_msgSender());\n  }\n\n  /**\n   * @dev Returns the address of the current owner.\n     */\n  function owner() public view virtual returns (address) {\n    return _owner;\n  }\n\n  /**\n   * @dev Throws if called by any account other than the owner.\n     */\n  modifier onlyOwner() {\n    require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n    _;\n  }\n\n  /**\n   * @dev Leaves the contract without owner. It will not be possible to call\n     * `onlyOwner` functions anymore. Can only be called by the current owner.\n     *\n     * NOTE: Renouncing ownership will leave the contract without an owner,\n     * thereby removing any functionality that is only available to the owner.\n     */\n  function renounceOwnership() public virtual onlyOwner {\n    _setOwner(address(0));\n  }\n\n  /**\n   * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Can only be called by the current owner.\n     */\n  function transferOwnership(address newOwner) public virtual onlyOwner {\n    require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n    _setOwner(newOwner);\n  }\n\n  function _setOwner(address newOwner) private {\n    address oldOwner = _owner;\n    _owner = newOwner;\n    emit OwnershipTransferred(oldOwner, newOwner);\n  }\n}\n"},"ReentrancyGuard.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Contract module that helps prevent reentrant calls to a function.\n *\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n * available, which can be applied to functions to make sure there are no nested\n * (reentrant) calls to them.\n *\n * Note that because there is a single `nonReentrant` guard, functions marked as\n * `nonReentrant` may not call one another. This can be worked around by making\n * those functions `private`, and then adding `external` `nonReentrant` entry\n * points to them.\n *\n * TIP: If you would like to learn more about reentrancy and alternative ways\n * to protect against it, check out our blog post\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\n */\nabstract contract ReentrancyGuard {\n  // Booleans are more expensive than uint256 or any type that takes up a full\n  // word because each write operation emits an extra SLOAD to first read the\n  // slot\u0027s contents, replace the bits taken up by the boolean, and then write\n  // back. This is the compiler\u0027s defense against contract upgrades and\n  // pointer aliasing, and it cannot be disabled.\n\n  // The values being non-zero value makes deployment a bit more expensive,\n  // but in exchange the refund on every call to nonReentrant will be lower in\n  // amount. Since refunds are capped to a percentage of the total\n  // transaction\u0027s gas, it is best to keep them low in cases like this one, to\n  // increase the likelihood of the full refund coming into effect.\n  uint256 private constant _NOT_ENTERED = 1;\n  uint256 private constant _ENTERED = 2;\n\n  uint256 private _status;\n\n  constructor() {\n    _status = _NOT_ENTERED;\n  }\n\n  /**\n   * @dev Prevents a contract from calling itself, directly or indirectly.\n     * Calling a `nonReentrant` function from another `nonReentrant`\n     * function is not supported. It is possible to prevent this from happening\n     * by making the `nonReentrant` function external, and make it call a\n     * `private` function that does the actual work.\n     */\n  modifier nonReentrant() {\n    // On the first call to nonReentrant, _notEntered will be true\n    require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n    // Any calls to nonReentrant after this point will fail\n    _status = _ENTERED;\n\n    _;\n\n    // By storing the original value once again, a refund is triggered (see\n    // https://eips.ethereum.org/EIPS/eip-2200)\n    _status = _NOT_ENTERED;\n  }\n}\n"},"SafeMath.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\n// CAUTION\n// This version of SafeMath should only be used with Solidity 0.8 or later,\n// because it relies on the compiler\u0027s built in overflow checks.\n\n/**\n * @dev Wrappers over Solidity\u0027s arithmetic operations.\n *\n * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler\n * now has built in overflow checking.\n */\nlibrary SafeMath {\n  /**\n   * @dev Returns the addition of two unsigned integers, with an overflow flag.\n     *\n     * _Available since v3.4._\n     */\n  function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n  unchecked {\n    uint256 c = a + b;\n    if (c \u003c a) return (false, 0);\n    return (true, c);\n  }\n  }\n\n  /**\n   * @dev Returns the substraction of two unsigned integers, with an overflow flag.\n     *\n     * _Available since v3.4._\n     */\n  function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n  unchecked {\n    if (b \u003e a) return (false, 0);\n    return (true, a - b);\n  }\n  }\n\n  /**\n   * @dev Returns the multiplication of two unsigned integers, with an overflow flag.\n     *\n     * _Available since v3.4._\n     */\n  function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n  unchecked {\n    // Gas optimization: this is cheaper than requiring \u0027a\u0027 not being zero, but the\n    // benefit is lost if \u0027b\u0027 is also tested.\n    // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522\n    if (a == 0) return (true, 0);\n    uint256 c = a * b;\n    if (c / a != b) return (false, 0);\n    return (true, c);\n  }\n  }\n\n  /**\n   * @dev Returns the division of two unsigned integers, with a division by zero flag.\n     *\n     * _Available since v3.4._\n     */\n  function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n  unchecked {\n    if (b == 0) return (false, 0);\n    return (true, a / b);\n  }\n  }\n\n  /**\n   * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.\n     *\n     * _Available since v3.4._\n     */\n  function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n  unchecked {\n    if (b == 0) return (false, 0);\n    return (true, a % b);\n  }\n  }\n\n  /**\n   * @dev Returns the addition of two unsigned integers, reverting on\n     * overflow.\n     *\n     * Counterpart to Solidity\u0027s `+` operator.\n     *\n     * Requirements:\n     *\n     * - Addition cannot overflow.\n     */\n  function add(uint256 a, uint256 b) internal pure returns (uint256) {\n    return a + b;\n  }\n\n  /**\n   * @dev Returns the subtraction of two unsigned integers, reverting on\n     * overflow (when the result is negative).\n     *\n     * Counterpart to Solidity\u0027s `-` operator.\n     *\n     * Requirements:\n     *\n     * - Subtraction cannot overflow.\n     */\n  function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n    return a - b;\n  }\n\n  /**\n   * @dev Returns the multiplication of two unsigned integers, reverting on\n     * overflow.\n     *\n     * Counterpart to Solidity\u0027s `*` operator.\n     *\n     * Requirements:\n     *\n     * - Multiplication cannot overflow.\n     */\n  function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n    return a * b;\n  }\n\n  /**\n   * @dev Returns the integer division of two unsigned integers, reverting on\n     * division by zero. The result is rounded towards zero.\n     *\n     * Counterpart to Solidity\u0027s `/` operator.\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n  function div(uint256 a, uint256 b) internal pure returns (uint256) {\n    return a / b;\n  }\n\n  /**\n   * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n     * reverting when dividing by zero.\n     *\n     * Counterpart to Solidity\u0027s `%` operator. This function uses a `revert`\n     * opcode (which leaves remaining gas untouched) while Solidity uses an\n     * invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n  function mod(uint256 a, uint256 b) internal pure returns (uint256) {\n    return a % b;\n  }\n\n  /**\n   * @dev Returns the subtraction of two unsigned integers, reverting with custom message on\n     * overflow (when the result is negative).\n     *\n     * CAUTION: This function is deprecated because it requires allocating memory for the error\n     * message unnecessarily. For custom revert reasons use {trySub}.\n     *\n     * Counterpart to Solidity\u0027s `-` operator.\n     *\n     * Requirements:\n     *\n     * - Subtraction cannot overflow.\n     */\n  function sub(\n    uint256 a,\n    uint256 b,\n    string memory errorMessage\n  ) internal pure returns (uint256) {\n  unchecked {\n    require(b \u003c= a, errorMessage);\n    return a - b;\n  }\n  }\n\n  /**\n   * @dev Returns the integer division of two unsigned integers, reverting with custom message on\n     * division by zero. The result is rounded towards zero.\n     *\n     * Counterpart to Solidity\u0027s `/` operator. Note: this function uses a\n     * `revert` opcode (which leaves remaining gas untouched) while Solidity\n     * uses an invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n  function div(\n    uint256 a,\n    uint256 b,\n    string memory errorMessage\n  ) internal pure returns (uint256) {\n  unchecked {\n    require(b \u003e 0, errorMessage);\n    return a / b;\n  }\n  }\n\n  /**\n   * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n     * reverting with custom message when dividing by zero.\n     *\n     * CAUTION: This function is deprecated because it requires allocating memory for the error\n     * message unnecessarily. For custom revert reasons use {tryMod}.\n     *\n     * Counterpart to Solidity\u0027s `%` operator. This function uses a `revert`\n     * opcode (which leaves remaining gas untouched) while Solidity uses an\n     * invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n  function mod(\n    uint256 a,\n    uint256 b,\n    string memory errorMessage\n  ) internal pure returns (uint256) {\n  unchecked {\n    require(b \u003e 0, errorMessage);\n    return a % b;\n  }\n  }\n}\n"},"TransferHelper.sol":{"content":"// SPDX-License-Identifier: MIT\r\n\r\npragma solidity \u003e=0.8.0;\r\n\r\nlibrary TransferHelper {\r\n    function safeApprove(address token, address to, uint value) internal {\r\n        // bytes4(keccak256(bytes(\u0027approve(address,uint256)\u0027)));\r\n        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));\r\n        require(success \u0026\u0026 (data.length == 0 || abi.decode(data, (bool))), \u0027TransferHelper: APPROVE_FAILED\u0027);\r\n    }\r\n\r\n    function safeTransfer(address token, address to, uint value) internal {\r\n        // bytes4(keccak256(bytes(\u0027transfer(address,uint256)\u0027)));\r\n        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));\r\n        require(success \u0026\u0026 (data.length == 0 || abi.decode(data, (bool))), \u0027TransferHelper: TRANSFER_FAILED\u0027);\r\n    }\r\n\r\n    function safeTransferFrom(address token, address from, address to, uint value) internal {\r\n        // bytes4(keccak256(bytes(\u0027transferFrom(address,address,uint256)\u0027)));\r\n        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));\r\n        require(success \u0026\u0026 (data.length == 0 || abi.decode(data, (bool))), \u0027TransferHelper: TRANSFER_FROM_FAILED\u0027);\r\n    }\r\n\r\n    function safeTransferETH(address to, uint value) internal {\r\n        (bool success,) = to.call{value:value}(new bytes(0));\r\n        require(success, \u0027TransferHelper: ETH_TRANSFER_FAILED\u0027);\r\n    }\r\n}\r\n"}}