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// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "IERC20.sol";
import "IExchange.sol";
import "IConnext.sol";

contract cryptopay {
    // define DEX address (UniswapV2-like exchange and functions)
    // will be used to swap tokens to USDC before bridging through Connext
    // (Connext only supports crosschain USDC transfers)
    address public DEX_ADDRESS;

    // define token addresses
    address public WETH_ADDRESS;
    address public USDC_ADDRESS;

    // UniswapV2 style interface DEX object, used to execute swaps
    IExchange public DEX;
    // Connext bridge contract
    IConnext public connext;

    // domainIds identify which chain to bridge tokens to through Connext
    // mapping allows for easy domainId fetching, e.g. give it "gnosis" and it will return connext's gnosis domainId
    mapping(string => uint32) chainNameToDomainId;
    // maps chainName to web3pay contract address on specific chain
    // contract addresses must be updated through setContractAddress() function after all contracts have been deployed
    mapping(string => address) chainNameToContractAddress;

    address owner;

    // e.g. if network is optimism, 'thisChainName' will be 'optimism'
    string thisChainName;

    constructor(
        address connextAddress,
        address dexAddress,
        address wethAddress,
        address usdcAddress,
        string memory _thisChainName
    ) {
        DEX_ADDRESS = dexAddress;
        WETH_ADDRESS = wethAddress;
        USDC_ADDRESS = usdcAddress;

        // define chainName => domainId mappings
        chainNameToDomainId["gnosis"] = 6778479;
        chainNameToDomainId["polygon"] = 1886350457;

        thisChainName = _thisChainName;

        // define DEX object
        DEX = IExchange(DEX_ADDRESS);
        // define connext object
        connext = IConnext(connextAddress);
        owner = msg.sender;
    }

    // once web3pay contracts are deployed on all 3 chains, get addresses for all contracts and update them here
    function updateContractAddresses(
        address gnosisCA,
        address polygonCA
    ) external {
        require(msg.sender == owner);
        chainNameToContractAddress["gnosis"] = gnosisCA;
        chainNameToContractAddress["polygon"] = polygonCA;
    }

    event USDCTransferToMerchantInitiated(
        address indexed _merchantAddress,
        string indexed _toChainName,
        address indexed _sender,
        uint256 _amountUSDC
    );
    event USDCTransferToMerchantConfirmed(
        address indexed _merchantAddress,
        string indexed _toChainName,
        address indexed _sender,
        uint256 _amountUSDC
    );

    /**
     * @dev function transfers USDC to merchant on any chain through Connext
     * @dev payment may be completed in ether or any ERC20 token as long as it has a liquidity pool on a predetermined exchange
     * @param toChainName name of chain where tokens will be transferred to
     * @param usdcAmount amount of USDC to transfer to merchant
     * @param merchantAddress address where to send USDC
     * @param inEther determines whether payment is being completed in ERC20 or ether. If true, tokenAddress will be ignored
     * @param tokenAddress address of ERC20 token in which payment is being completed
     * @param tokenAmount amount of ether or ERC20 with which payment is being completed in
     * @param relayFee amount of ether to send to connext to sucesfully complete cross chain transfer
     * */
    function sendUSDCToMerchant(
        string memory toChainName,
        uint256 usdcAmount,
        address merchantAddress,
        bool inEther,
        //**payment may be completed in any token with a liquidity pool on predetermined exchange  */
        //**if a non-USDC token is sent, it will be swapped to USDC */
        //**if payment is being completed in ether, tokenAddress will be ignored  */
        address tokenAddress,
        uint256 tokenAmount,
        uint256 relayFee
    ) external payable {
        if (inEther == false) {
            // if payment is being completed in ERC20, transfer tokens to contract from user
            require(
                IERC20(tokenAddress).allowance(msg.sender, address(this)) >=
                    tokenAmount,
                "User needs to increase allowance"
            );
            IERC20(tokenAddress).transferFrom(
                msg.sender,
                address(this),
                tokenAmount
            );
        }
        if (tokenAddress == USDC_ADDRESS) {
            // if token is USDC, bridge USDC outright without executing swap
            require(
                IERC20(USDC_ADDRESS).balanceOf(address(this)) >= usdcAmount,
                "Not enough USDC in contract"
            );
            bridgeUSDCToMerchant(
                toChainName,
                merchantAddress,
                usdcAmount,
                msg.sender,
                relayFee
            );
            emit USDCTransferToMerchantInitiated(
                merchantAddress,
                toChainName,
                msg.sender,
                usdcAmount
            );
        } else {
            // if token is not USDC, execute swap and then execute transfer
            swapTokensForUSDC(inEther, tokenAddress, tokenAmount);
            require(
                IERC20(USDC_ADDRESS).balanceOf(address(this)) >= usdcAmount,
                "Not enough USDC in contract"
            );
            bridgeUSDCToMerchant(
                toChainName,
                merchantAddress,
                usdcAmount,
                msg.sender,
                relayFee
            );
            emit USDCTransferToMerchantInitiated(
                merchantAddress,
                toChainName,
                msg.sender,
                usdcAmount
            );
        }
    }

    /**
     * @dev swaps tokens to USDC
     * @param inEther determines if token is ether or ERC20. If true, tokenAddress is ignored
     * @param tokenAddress address of token which will be swapped to USDC
     * @param tokenInAmount amount of tokens to swap to USDC
     */
    function swapTokensForUSDC(
        /** identifies whether to swap ether => USDC or ERC20 => USDC */ bool inEther,
        /** set to blank if inEther is true */ address tokenAddress,
        uint256 tokenInAmount
    ) internal {
        require(tokenAddress != USDC_ADDRESS, "Cannot swap USDC => USDC");
        // if token is ether, swap ether to usdc
        if (inEther) {
            // define path
            address[] memory path;
            path[0] = WETH_ADDRESS;
            path[1] = USDC_ADDRESS;
            // swap tokens
            DEX.swapExactETHForTokensSupportingFeeOnTransferTokens{
                value: tokenInAmount
            }(
                // amount of USDC to be received after trade
                DEX.getAmountsOut(tokenInAmount, path)[1],
                path,
                // tokens will be sent to contract address
                address(this),
                block.timestamp + 60
            );
        } else {
            // approve tokens to DEX
            IERC20(tokenAddress).approve(DEX_ADDRESS, tokenInAmount);
            // if token is weth (or WXDAI, WMATIC, depends on chain) swap weth for usdc
            if (tokenAddress == WETH_ADDRESS) {
                address[] memory path;
                path[0] = WETH_ADDRESS;
                path[1] = USDC_ADDRESS;
                // execute swap
                DEX.swapExactTokensForTokensSupportingFeeOnTransferTokens(
                    tokenInAmount,
                    // get amount of USDC to be received after trade
                    DEX.getAmountsOut(tokenInAmount, path)[1],
                    path,
                    address(this),
                    block.timestamp + 60
                );
                // if token is not ether or weth, create ERC20 => WETH => USDC path and swap tokens
            } else {
                // define path
                address[] memory path;
                path[0] = tokenAddress;
                path[1] = WETH_ADDRESS;
                path[2] = USDC_ADDRESS;
                // execute swap
                DEX.swapExactTokensForTokensSupportingFeeOnTransferTokens(
                    tokenInAmount,
                    DEX.getAmountsOut(tokenInAmount, path)[2],
                    path,
                    address(this),
                    block.timestamp + 60
                );
            }
        }
    }

    /**
     * @dev Transfers 'amountUSDC' USDC to 'merchantAddress' on 'chainName' through connext
     * @param toChainName name of chain on which USDC will be transferred to merchant. If 'toChainName' == 'thisChainName', this means that the current chain is the same chain on which merchant is accepting payment which means bridging is unnecessary
     * @param merchantAddress address where USDC will be transferred
     * @param amountUSDC amount of USDC to transfer
     * @param senderAddress address of sender of USDC
     * @param relayFee amount of ether to pay so that Connext sucesfully completes transfer
     */

    function bridgeUSDCToMerchant(
        string memory toChainName,
        address merchantAddress,
        uint256 amountUSDC,
        address senderAddress,
        uint256 relayFee
    ) internal {
        // if tokens are being bridged to the current chain, transfer usdc without bridging
        if (
            keccak256(abi.encode(thisChainName)) ==
            keccak256(abi.encode(toChainName))
        ) {
            IERC20(USDC_ADDRESS).transfer(merchantAddress, amountUSDC);
            emit USDCTransferToMerchantConfirmed(
                merchantAddress,
                toChainName,
                msg.sender,
                amountUSDC
            );
        } else {
            // bridge tokens
            connext.xcall{value: relayFee}(
                chainNameToDomainId[toChainName],
                chainNameToContractAddress[toChainName],
                USDC_ADDRESS,
                msg.sender,
                amountUSDC,
                300,
                abi.encode(merchantAddress, amountUSDC, senderAddress)
            );
        }
    }

    // estimates tokens needed to swap to USDC and sucesfully execute crosschain connext transfer. accounts for 3% connext transfer slippage fee
    function estimateTokensNeeded(
        uint256 usdcAmount,
        address[] memory path
    ) public view returns (uint256) {
        uint256 tokenAmountIn = DEX.getAmountsIn(
            (usdcAmount * 103093) / 100000,
            path
        )[0];
        return (tokenAmountIn * 10005) / 10000;
    }

    function xReceive(
        bytes32 _transferId,
        uint256 _amount,
        address _asset,
        address _originSender,
        uint32 _origin,
        bytes memory _callData
    ) external returns (bytes memory) {
        (
            address merchantAddress,
            uint256 amountUSDC,
            address senderAddress
        ) = abi.decode(_callData, (address, uint256, address));
        IERC20(USDC_ADDRESS).transfer(merchantAddress, amountUSDC);
        emit USDCTransferToMerchantConfirmed(
            merchantAddress,
            thisChainName,
            senderAddress,
            amountUSDC
        );
    }
}

// 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: MIT

pragma solidity ^0.8.0;

// standard UniswapV2 style DEX
interface IExchange {
    function getAmountsIn(
        uint256 amountOut,
        address[] memory path
    ) external view returns (uint256[] memory amounts);

    function getAmountsOut(
        uint256 amountIn,
        address[] memory path
    ) external view returns (uint256[] memory amounts);

    function swapExactETHForTokens(
        uint256 amountOutMin,
        address[] memory path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] memory path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] memory path,
        address to,
        uint256 deadline
    ) external;

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] memory path,
        address to,
        uint256 deadline
    ) external;
}

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

import {ExecuteArgs, TransferInfo, DestinationTransferStatus} from "LibConnextStorage.sol";
import {TokenId} from "TokenId.sol";

interface IConnext {
    // ============ BRIDGE ==============

    function xcall(
        uint32 _destination,
        address _to,
        address _asset,
        address _delegate,
        uint256 _amount,
        uint256 _slippage,
        bytes calldata _callData
    ) external payable returns (bytes32);

    function xcallIntoLocal(
        uint32 _destination,
        address _to,
        address _asset,
        address _delegate,
        uint256 _amount,
        uint256 _slippage,
        bytes calldata _callData
    ) external payable returns (bytes32);

    function execute(
        ExecuteArgs calldata _args
    ) external returns (bytes32 transferId);

    function forceUpdateSlippage(
        TransferInfo calldata _params,
        uint256 _slippage
    ) external;

    function forceReceiveLocal(TransferInfo calldata _params) external;

    function bumpTransfer(bytes32 _transferId) external payable;

    function routedTransfers(
        bytes32 _transferId
    ) external view returns (address[] memory);

    function transferStatus(
        bytes32 _transferId
    ) external view returns (DestinationTransferStatus);

    function remote(uint32 _domain) external view returns (address);

    function domain() external view returns (uint256);

    function nonce() external view returns (uint256);

    function approvedSequencers(
        address _sequencer
    ) external view returns (bool);

    function xAppConnectionManager() external view returns (address);

    // ============ ROUTERS ==============

    function LIQUIDITY_FEE_NUMERATOR() external view returns (uint256);

    function LIQUIDITY_FEE_DENOMINATOR() external view returns (uint256);

    function getRouterApproval(address _router) external view returns (bool);

    function getRouterRecipient(
        address _router
    ) external view returns (address);

    function getRouterOwner(address _router) external view returns (address);

    function getProposedRouterOwner(
        address _router
    ) external view returns (address);

    function getProposedRouterOwnerTimestamp(
        address _router
    ) external view returns (uint256);

    function maxRoutersPerTransfer() external view returns (uint256);

    function routerBalances(
        address _router,
        address _asset
    ) external view returns (uint256);

    function getRouterApprovalForPortal(
        address _router
    ) external view returns (bool);

    function initializeRouter(address _owner, address _recipient) external;

    function setRouterRecipient(address _router, address _recipient) external;

    function proposeRouterOwner(address _router, address _proposed) external;

    function acceptProposedRouterOwner(address _router) external;

    function addRouterLiquidityFor(
        uint256 _amount,
        address _local,
        address _router
    ) external payable;

    function addRouterLiquidity(
        uint256 _amount,
        address _local
    ) external payable;

    function removeRouterLiquidityFor(
        TokenId memory _canonical,
        uint256 _amount,
        address payable _to,
        address _router
    ) external;

    function removeRouterLiquidity(
        TokenId memory _canonical,
        uint256 _amount,
        address payable _to
    ) external;
}

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

/**
 * @notice Enum representing status of destination transfer
 * @dev Status is only assigned on the destination domain, will always be "none" for the
 * origin domains
 * @return uint - Index of value in enum
 */
enum DestinationTransferStatus {
    None, // 0
    Reconciled, // 1
    Executed, // 2
    Completed // 3 - executed + reconciled
}

/**
 * @notice These are the parameters that will remain constant between the
 * two chains. They are supplied on `xcall` and should be asserted on `execute`
 * @property to - The account that receives funds, in the event of a crosschain call,
 * will receive funds if the call fails.
 *
 * @param originDomain - The originating domain (i.e. where `xcall` is called)
 * @param destinationDomain - The final domain (i.e. where `execute` / `reconcile` are called)\
 * @param canonicalDomain - The canonical domain of the asset you are bridging
 * @param to - The address you are sending funds (and potentially data) to
 * @param delegate - An address who can execute txs on behalf of `to`, in addition to allowing relayers
 * @param receiveLocal - If true, will use the local asset on the destination instead of adopted.
 * @param callData - The data to execute on the receiving chain. If no crosschain call is needed, then leave empty.
 * @param slippage - Slippage user is willing to accept from original amount in expressed in BPS (i.e. if
 * a user takes 1% slippage, this is expressed as 1_000)
 * @param originSender - The msg.sender of the xcall
 * @param bridgedAmt - The amount sent over the bridge (after potential AMM on xcall)
 * @param normalizedIn - The amount sent to `xcall`, normalized to 18 decimals
 * @param nonce - The nonce on the origin domain used to ensure the transferIds are unique
 * @param canonicalId - The unique identifier of the canonical token corresponding to bridge assets
 */
struct TransferInfo {
    uint32 originDomain;
    uint32 destinationDomain;
    uint32 canonicalDomain;
    address to;
    address delegate;
    bool receiveLocal;
    bytes callData;
    uint256 slippage;
    address originSender;
    uint256 bridgedAmt;
    uint256 normalizedIn;
    uint256 nonce;
    bytes32 canonicalId;
}

/**
 * @notice
 * @param params - The TransferInfo. These are consistent across sending and receiving chains.
 * @param routers - The routers who you are sending the funds on behalf of.
 * @param routerSignatures - Signatures belonging to the routers indicating permission to use funds
 * for the signed transfer ID.
 * @param sequencer - The sequencer who assigned the router path to this transfer.
 * @param sequencerSignature - Signature produced by the sequencer for path assignment accountability
 * for the path that was signed.
 */
struct ExecuteArgs {
    TransferInfo params;
    address[] routers;
    bytes[] routerSignatures;
    address sequencer;
    bytes sequencerSignature;
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.0;

// ============= Structs =============

// Tokens are identified by a TokenId:
// domain - 4 byte chain ID of the chain from which the token originates
// id - 32 byte identifier of the token address on the origin chain, in that chain's address format
struct TokenId {
    uint32 domain;
    bytes32 id;
}

{
  "evmVersion": "istanbul",
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "libraries": {
    "cryptopay.sol": {}
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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[{"inputs":[{"internalType":"address","name":"connextAddress","type":"address"},{"internalType":"address","name":"dexAddress","type":"address"},{"internalType":"address","name":"wethAddress","type":"address"},{"internalType":"address","name":"usdcAddress","type":"address"},{"internalType":"string","name":"_thisChainName","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_merchantAddress","type":"address"},{"indexed":true,"internalType":"string","name":"_toChainName","type":"string"},{"indexed":true,"internalType":"address","name":"_sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amountUSDC","type":"uint256"}],"name":"USDCTransferToMerchantConfirmed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_merchantAddress","type":"address"},{"indexed":true,"internalType":"string","name":"_toChainName","type":"string"},{"indexed":true,"internalType":"address","name":"_sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amountUSDC","type":"uint256"}],"name":"USDCTransferToMerchantInitiated","type":"event"},{"inputs":[],"name":"DEX","outputs":[{"internalType":"contract IExchange","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DEX_ADDRESS","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"USDC_ADDRESS","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"WETH_ADDRESS","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"connext","outputs":[{"internalType":"contract IConnext","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"usdcAmount","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"}],"name":"estimateTokensNeeded","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"toChainName","type":"string"},{"internalType":"uint256","name":"usdcAmount","type":"uint256"},{"internalType":"address","name":"merchantAddress","type":"address"},{"internalType":"bool","name":"inEther","type":"bool"},{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"tokenAmount","type":"uint256"},{"internalType":"uint256","name":"relayFee","type":"uint256"}],"name":"sendUSDCToMerchant","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"gnosisCA","type":"address"},{"internalType":"address","name":"polygonCA","type":"address"}],"name":"updateContractAddresses","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_transferId","type":"bytes32"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_asset","type":"address"},{"internalType":"address","name":"_originSender","type":"address"},{"internalType":"uint32","name":"_origin","type":"uint32"},{"internalType":"bytes","name":"_callData","type":"bytes"}],"name":"xReceive","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"nonpayable","type":"function"}]

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00000000000000000000000011984dc4465481512eb5b777e44061c158cf22590000000000000000000000001b02da8cb0d097eb8d57a175b88c7d8b479975060000000000000000000000000d500b1d8e8ef31e21c99d1db9a6444d3adf12700000000000000000000000002791bca1f2de4661ed88a30c99a7a9449aa8417400000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000007706f6c79676f6e00000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : connextAddress (address): 0x11984dc4465481512eb5b777E44061C158CF2259
Arg [1] : dexAddress (address): 0x1b02dA8Cb0d097eB8D57A175b88c7D8b47997506
Arg [2] : wethAddress (address): 0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270
Arg [3] : usdcAddress (address): 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174
Arg [4] : _thisChainName (string): polygon

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 00000000000000000000000011984dc4465481512eb5b777e44061c158cf2259
Arg [1] : 0000000000000000000000001b02da8cb0d097eb8d57a175b88c7d8b47997506
Arg [2] : 0000000000000000000000000d500b1d8e8ef31e21c99d1db9a6444d3adf1270
Arg [3] : 0000000000000000000000002791bca1f2de4661ed88a30c99a7a9449aa84174
Arg [4] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000007
Arg [6] : 706f6c79676f6e00000000000000000000000000000000000000000000000000