Contract 0x7F974c1E969c8201c08273b958dA646fe5d536AA 9

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @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

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

contract Config {
    // function signature of "postProcess()"
    bytes4 public constant POSTPROCESS_SIG = 0xc2722916;

    // The base amount of percentage function
    uint256 public constant PERCENTAGE_BASE = 1 ether;

    // Handler post-process type. Others should not happen now.
    enum HandlerType {
        Token,
        Custom,
        Others
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./lib/LibCache.sol";
import "./lib/LibStack.sol";

/// @notice A cache structure composed by a bytes32 array
contract Storage {
    using LibCache for mapping(bytes32 => bytes32);
    using LibStack for bytes32[];

    bytes32[] public stack;
    mapping(bytes32 => bytes32) public cache;

    // keccak256 hash of "msg.sender"
    // prettier-ignore
    bytes32 public constant MSG_SENDER_KEY = 0xb2f2618cecbbb6e7468cc0f2aa43858ad8d153e0280b22285e28e853bb9d453a;

    modifier isStackEmpty() {
        require(stack.length == 0, "Stack not empty");
        _;
    }

    modifier isInitialized() {
        require(_getSender() != address(0), "Sender is not initialized");
        _;
    }

    modifier isNotInitialized() {
        require(_getSender() == address(0), "Sender is initialized");
        _;
    }

    function _setSender() internal isNotInitialized {
        cache.setAddress(MSG_SENDER_KEY, msg.sender);
    }

    function _resetSender() internal {
        cache.setAddress(MSG_SENDER_KEY, address(0));
    }

    function _getSender() internal view returns (address) {
        return cache.getAddress(MSG_SENDER_KEY);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../interface/IERC20Usdt.sol";

import "../Config.sol";
import "../Storage.sol";

abstract contract HandlerBase is Storage, Config {
    using SafeERC20 for IERC20;
    using LibStack for bytes32[];

    address public constant NATIVE_TOKEN_ADDRESS =
        0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    function postProcess() external payable virtual {
        revert("Invalid post process");
        /* Implementation template
        bytes4 sig = stack.getSig();
        if (sig == bytes4(keccak256(bytes("handlerFunction_1()")))) {
            // Do something
        } else if (sig == bytes4(keccak256(bytes("handlerFunction_2()")))) {
            bytes32 temp = stack.get();
            // Do something
        } else revert("Invalid post process");
        */
    }

    function _updateToken(address token) internal {
        stack.setAddress(token);
        // Ignore token type to fit old handlers
        // stack.setHandlerType(uint256(HandlerType.Token));
    }

    function _updatePostProcess(bytes32[] memory params) internal {
        for (uint256 i = params.length; i > 0; i--) {
            stack.set(params[i - 1]);
        }
        stack.set(msg.sig);
        stack.setHandlerType(HandlerType.Custom);
    }

    function getContractName() public pure virtual returns (string memory);

    function _revertMsg(
        string memory functionName,
        string memory reason
    ) internal pure {
        revert(
            string(
                abi.encodePacked(
                    getContractName(),
                    "_",
                    functionName,
                    ": ",
                    reason
                )
            )
        );
    }

    function _revertMsg(string memory functionName) internal pure {
        _revertMsg(functionName, "Unspecified");
    }

    function _requireMsg(
        bool condition,
        string memory functionName,
        string memory reason
    ) internal pure {
        if (!condition) _revertMsg(functionName, reason);
    }

    function _uint2String(uint256 n) internal pure returns (string memory) {
        if (n == 0) {
            return "0";
        } else {
            uint256 len = 0;
            for (uint256 temp = n; temp > 0; temp /= 10) {
                len++;
            }
            bytes memory str = new bytes(len);
            for (uint256 i = len; i > 0; i--) {
                str[i - 1] = bytes1(uint8(48 + (n % 10)));
                n /= 10;
            }
            return string(str);
        }
    }

    function _getBalance(
        address token,
        uint256 amount
    ) internal view returns (uint256) {
        if (amount != type(uint256).max) {
            return amount;
        }

        // ETH case
        if (token == address(0) || token == NATIVE_TOKEN_ADDRESS) {
            return address(this).balance;
        }
        // ERC20 token case
        return IERC20(token).balanceOf(address(this));
    }

    function _tokenApprove(
        address token,
        address spender,
        uint256 amount
    ) internal {
        try IERC20Usdt(token).approve(spender, amount) {} catch {
            IERC20(token).safeApprove(spender, 0);
            IERC20(token).safeApprove(spender, amount);
        }
    }

    function _tokenApproveZero(address token, address spender) internal {
        if (IERC20Usdt(token).allowance(address(this), spender) > 0) {
            try IERC20Usdt(token).approve(spender, 0) {} catch {
                IERC20Usdt(token).approve(spender, 1);
            }
        }
    }

    function _isNotNativeToken(address token) internal pure returns (bool) {
        return (token != address(0) && token != NATIVE_TOKEN_ADDRESS);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.10;

import {HandlerBase} from "../HandlerBase.sol";
import {IStargateRouter, IStargateWidget} from "./IStargateRouter.sol";
import {IStargateRouterETH} from "./IStargateRouterETH.sol";
import {IStargateToken} from "./IStargateToken.sol";
import {IFactory, IPool} from "./IFactory.sol";

contract HStargate is HandlerBase {
    address public immutable router;
    address public immutable routerETH;
    address public immutable stgToken;
    address public immutable factory;
    address public immutable widgetSwap;
    bytes2 public immutable partnerId;

    constructor(
        address router_,
        address routerETH_,
        address stgToken_,
        address factory_,
        address widgetSwap_,
        bytes2 partnerId_
    ) {
        router = router_;
        routerETH = routerETH_;
        stgToken = stgToken_;
        factory = factory_;
        widgetSwap = widgetSwap_;
        partnerId = partnerId_;
    }

    function getContractName() public pure override returns (string memory) {
        return "HStargate";
    }

    function swapETH(
        uint16 dstChainId,
        address payable refundAddress,
        uint256 amountIn,
        uint256 fee,
        uint256 amountOutMin,
        address to
    ) external payable {
        _requireMsg(to != address(0), "swapETH", "to zero address");

        uint256 value;
        if (amountIn != type(uint256).max) {
            value = amountIn + fee;
        } else {
            value = address(this).balance;
            amountIn = value - fee;
        }

        // Swap ETH
        try
            IStargateRouterETH(routerETH).swapETH{value: value}(
                dstChainId,
                refundAddress,
                abi.encodePacked(to),
                amountIn,
                amountOutMin
            )
        {} catch Error(string memory reason) {
            _revertMsg("swapETH", reason);
        } catch {
            _revertMsg("swapETH");
        }

        // Partnership
        IStargateWidget(widgetSwap).partnerSwap(partnerId);
    }

    function swap(
        uint16 dstChainId,
        uint256 srcPoolId,
        uint256 dstPoolId,
        address payable refundAddress,
        uint256 amountIn,
        uint256 fee,
        uint256 amountOutMin,
        address to
    ) external payable {
        _requireMsg(to != address(0), "swap", "to zero address");

        // Approve input token to Stargate
        IPool pool = IFactory(factory).getPool(srcPoolId);
        _requireMsg(address(pool) != address(0), "swap", "pool not found");
        address tokenIn = pool.token();
        amountIn = _getBalance(tokenIn, amountIn);
        _tokenApprove(tokenIn, router, amountIn);

        // Swap input token
        try
            IStargateRouter(router).swap{value: fee}(
                dstChainId,
                srcPoolId,
                dstPoolId,
                refundAddress,
                amountIn,
                amountOutMin,
                IStargateRouter.lzTxObj(0, 0, "0x"), // no destination gas
                abi.encodePacked(to),
                bytes("") // no data
            )
        {} catch Error(string memory reason) {
            _revertMsg("swap", reason);
        } catch {
            _revertMsg("swap");
        }

        // Reset Approval
        _tokenApproveZero(tokenIn, router);

        // Partnership
        IStargateWidget(widgetSwap).partnerSwap(partnerId);
    }

    function sendTokens(
        uint16 dstChainId,
        address to,
        uint256 amountIn,
        uint256 fee,
        uint256 dstGas
    ) external payable {
        _requireMsg(to != address(0), "sendTokens", "to zero address");
        _requireMsg(amountIn != 0, "sendTokens", "zero amountIn");

        amountIn = _getBalance(stgToken, amountIn);

        // Send STG token
        try
            IStargateToken(stgToken).sendTokens{value: fee}(
                dstChainId,
                abi.encodePacked(to),
                amountIn,
                address(0),
                abi.encodePacked(uint16(1) /* version */, dstGas)
            )
        {} catch Error(string memory reason) {
            _revertMsg("sendTokens", reason);
        } catch {
            _revertMsg("sendTokens");
        }

        // Partnership
        IStargateWidget(widgetSwap).partnerSwap(partnerId);
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "./IPool.sol";

interface IFactory {
   function getPool(uint256 poolId) external view returns(IPool); 
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

interface IPool {
    function token() external view returns(address);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

interface IStargateWidget {
    function partnerSwap(bytes2 _partnerId) external;
    event PartnerSwap(bytes2 indexed partnerId);
}

interface IStargateRouter {
    struct lzTxObj {
        uint256 dstGasForCall;
        uint256 dstNativeAmount;
        bytes dstNativeAddr;
    }

    function swap(
        uint16 _dstChainId,
        uint256 _srcPoolId,
        uint256 _dstPoolId,
        address payable _refundAddress,
        uint256 _amountLD,
        uint256 _minAmountLD,
        lzTxObj memory _lzTxParams,
        bytes calldata _to,
        bytes calldata _payload
    ) external payable;

    function quoteLayerZeroFee(
        uint16 _dstChainId,
        uint8 _functionType,
        bytes calldata _toAddress,
        bytes calldata _transferAndCallPayload,
        lzTxObj memory _lzTxParams
    ) external view returns (uint256 /*nativeFee*/, uint256 /*layerZeroFee*/);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

interface IStargateRouterETH {         
    function swapETH(
        uint16 _dstChainId,                         // destination Stargate chainId
        address payable _refundAddress,             // refund additional messageFee to this address
        bytes calldata _toAddress,                  // the receiver of the destination ETH
        uint256 _amountLD,                          // the amount, in Local Decimals, to be swapped
        uint256 _minAmountLD                        // the minimum amount accepted out on destination
    ) external payable;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

interface IStargateToken {
    event SendToChain(uint16 dstChainId, bytes to, uint256 qty);

    function isMain() external returns(bool);

    function sendTokens(
        uint16 _dstChainId, // send tokens to this chainId
        bytes calldata _to, // where to deliver the tokens on the destination chain
        uint256 _qty, // how many tokens to send
        address zroPaymentAddress, // ZRO payment address
        bytes calldata adapterParam // txParameters
    ) external payable;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

interface IERC20Usdt {
    function totalSupply() external view returns (uint256);

    function balanceOf(address account) external view returns (uint256);

    function transfer(address recipient, uint256 amount) external;

    function allowance(address owner, address spender) external view returns (uint256);

    function approve(address spender, uint256 amount) external;

    function transferFrom(address sender, address recipient, uint256 amount) external;

    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

library LibCache {
    function set(
        mapping(bytes32 => bytes32) storage _cache,
        bytes32 _key,
        bytes32 _value
    ) internal {
        _cache[_key] = _value;
    }

    function setAddress(
        mapping(bytes32 => bytes32) storage _cache,
        bytes32 _key,
        address _value
    ) internal {
        _cache[_key] = bytes32(uint256(uint160(_value)));
    }

    function setUint256(
        mapping(bytes32 => bytes32) storage _cache,
        bytes32 _key,
        uint256 _value
    ) internal {
        _cache[_key] = bytes32(_value);
    }

    function getAddress(
        mapping(bytes32 => bytes32) storage _cache,
        bytes32 _key
    ) internal view returns (address ret) {
        ret = address(uint160(uint256(_cache[_key])));
    }

    function getUint256(
        mapping(bytes32 => bytes32) storage _cache,
        bytes32 _key
    ) internal view returns (uint256 ret) {
        ret = uint256(_cache[_key]);
    }

    function get(
        mapping(bytes32 => bytes32) storage _cache,
        bytes32 _key
    ) internal view returns (bytes32 ret) {
        ret = _cache[_key];
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../Config.sol";

library LibStack {
    function setAddress(bytes32[] storage _stack, address _input) internal {
        _stack.push(bytes32(uint256(uint160(_input))));
    }

    function set(bytes32[] storage _stack, bytes32 _input) internal {
        _stack.push(_input);
    }

    function setHandlerType(
        bytes32[] storage _stack,
        Config.HandlerType _input
    ) internal {
        _stack.push(bytes12(uint96(_input)));
    }

    function getAddress(
        bytes32[] storage _stack
    ) internal returns (address ret) {
        ret = address(uint160(uint256(peek(_stack))));
        _stack.pop();
    }

    function getSig(bytes32[] storage _stack) internal returns (bytes4 ret) {
        ret = bytes4(peek(_stack));
        _stack.pop();
    }

    function get(bytes32[] storage _stack) internal returns (bytes32 ret) {
        ret = peek(_stack);
        _stack.pop();
    }

    function peek(
        bytes32[] storage _stack
    ) internal view returns (bytes32 ret) {
        uint256 length = _stack.length;
        require(length > 0, "stack empty");
        ret = _stack[length - 1];
    }

    function peek(
        bytes32[] storage _stack,
        uint256 _index
    ) internal view returns (bytes32 ret) {
        uint256 length = _stack.length;
        require(length > 0, "stack empty");
        require(length > _index, "not enough elements in stack");
        ret = _stack[length - _index - 1];
    }
}

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

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"router_","type":"address"},{"internalType":"address","name":"routerETH_","type":"address"},{"internalType":"address","name":"stgToken_","type":"address"},{"internalType":"address","name":"factory_","type":"address"},{"internalType":"address","name":"widgetSwap_","type":"address"},{"internalType":"bytes2","name":"partnerId_","type":"bytes2"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"MSG_SENDER_KEY","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"NATIVE_TOKEN_ADDRESS","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERCENTAGE_BASE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"POSTPROCESS_SIG","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"cache","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getContractName","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"partnerId","outputs":[{"internalType":"bytes2","name":"","type":"bytes2"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"postProcess","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"router","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"routerETH","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"dstChainId","type":"uint16"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"fee","type":"uint256"},{"internalType":"uint256","name":"dstGas","type":"uint256"}],"name":"sendTokens","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"stack","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"stgToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"dstChainId","type":"uint16"},{"internalType":"uint256","name":"srcPoolId","type":"uint256"},{"internalType":"uint256","name":"dstPoolId","type":"uint256"},{"internalType":"address payable","name":"refundAddress","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"fee","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"swap","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint16","name":"dstChainId","type":"uint16"},{"internalType":"address payable","name":"refundAddress","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"fee","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"swapETH","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"widgetSwap","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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000000000000000000000000b0d502e938ed5f4df2e681fe6e419ff29631d62b000000000000000000000000b49c4e680174e331cb0a7ff3ab58afc9738d5f8b000000000000000000000000296f55f8fb28e498b858d0bcda06d955b2cb3f97000000000000000000000000e3b53af74a4bf62ae5511055290838050bf764df00000000000000000000000016419058f15a86795933f78dc624b384d09e3a4e0013000000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : router_ (address): 0xB0D502E938ed5f4df2E681fE6E419ff29631d62b
Arg [1] : routerETH_ (address): 0xB49c4e680174E331CB0A7fF3Ab58afC9738d5F8b
Arg [2] : stgToken_ (address): 0x296F55F8Fb28E498B858d0BcDA06D955B2Cb3f97
Arg [3] : factory_ (address): 0xE3B53AF74a4BF62Ae5511055290838050bf764Df
Arg [4] : widgetSwap_ (address): 0x16419058f15a86795933f78dC624B384D09E3a4e
Arg [5] : partnerId_ (bytes2): 0x0013

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 000000000000000000000000b0d502e938ed5f4df2e681fe6e419ff29631d62b
Arg [1] : 000000000000000000000000b49c4e680174e331cb0a7ff3ab58afc9738d5f8b
Arg [2] : 000000000000000000000000296f55f8fb28e498b858d0bcda06d955b2cb3f97
Arg [3] : 000000000000000000000000e3b53af74a4bf62ae5511055290838050bf764df
Arg [4] : 00000000000000000000000016419058f15a86795933f78dc624b384d09e3a4e
Arg [5] : 0013000000000000000000000000000000000000000000000000000000000000