Contract 0x385b139184c1897A39E4692caE2CCA5C849299E6 3

Txn Hash Method
Block
From
To
Value [Txn Fee]
0xe5d2619db7d945607cfa3c69321e8f22bf6b9c0418d96fc5849bcedbda2d71aa0x8218b58f40789642022-08-09 10:26:433 hrs 20 mins ago0xd02e15ad967477129fbebfe54b468dadfeb940d4 IN  XY Finance: Aggregator V20 CRO1.5037801839580
0x392a1d5c2da54dcd1e5d67328444841784797b2f8795bfb36d7202473c36f6250x8218b58f40769932022-08-09 7:19:366 hrs 28 mins ago0x748778f1a36e5798e28a415be4a874e4e0838209 IN  XY Finance: Aggregator V20 CRO3.611592066844 4,945.875529591
0xfc900f0161d8743721a6c8705ef1d517b11d974e51ad8f933683f399625c77f30x8218b58f40688612022-08-08 18:31:4219 hrs 15 mins ago0x0e79c2146417a1235cfc8e90f7c99097950cfa5e IN  XY Finance: Aggregator V2220 CRO1.381681846320
0x337f59241e0d2d38e9ab6140e6c8d13433623929a9a2041b849e8e7138bd41cd0x8218b58f40684892022-08-08 17:56:2519 hrs 51 mins ago0x8983ca3d0d1a40ced4351d3b043506cac08db5d9 IN  XY Finance: Aggregator V20 CRO1.7001775296330
0xb397537d811407eb611d6f9502b21ca1856558e15401dcec914cb062e360fded0x8218b58f40684832022-08-08 17:55:5119 hrs 51 mins ago0x8983ca3d0d1a40ced4351d3b043506cac08db5d9 IN  XY Finance: Aggregator V20 CRO1.7035103783810
0x8f9773af1ad1cbe6e5c11ede687cd9b3e699a24e851a28fd9a1bcc021ab39f450x8218b58f40684742022-08-08 17:55:0019 hrs 52 mins ago0x8983ca3d0d1a40ced4351d3b043506cac08db5d9 IN  XY Finance: Aggregator V20 CRO1.7035006282160
0xee81032edf682468581d19395b9fa94c89a8824abba261903559812cd3e8cbaa0x8218b58f40684692022-08-08 17:54:3219 hrs 53 mins ago0x8983ca3d0d1a40ced4351d3b043506cac08db5d9 IN  XY Finance: Aggregator V20 CRO1.7035007227120
0xab34fb0d876a427be4d9677ed20899abb4ce34f4e0adce03309ab8b3d30430ec0x8218b58f40684632022-08-08 17:53:5819 hrs 53 mins ago0x8983ca3d0d1a40ced4351d3b043506cac08db5d9 IN  XY Finance: Aggregator V20 CRO1.5041328965130
0xf82c64e9ddb3efd11e2e756c603003f1a9cea533009240c5b787e6b1ff2560c60x8218b58f40684472022-08-08 17:52:2819 hrs 55 mins ago0x8983ca3d0d1a40ced4351d3b043506cac08db5d9 IN  XY Finance: Aggregator V210 CRO1.0786756750280
0x41e4b48f13fb0f77fde92d154779de3295bf3e995e0862ea5899450b0c278e6e0x8218b58f40684362022-08-08 17:51:2419 hrs 56 mins ago0x8983ca3d0d1a40ced4351d3b043506cac08db5d9 IN  XY Finance: Aggregator V20 CRO1.703511119280
0x0c537d7ee9f104ace46ddba7c11708f45591395fa5c95462c5df7d0d7c7b211a0x8218b58f40684282022-08-08 17:50:3919 hrs 57 mins ago0x8983ca3d0d1a40ced4351d3b043506cac08db5d9 IN  XY Finance: Aggregator V20 CRO1.5041333694910
0x10ffaa9cdecc1e2cae2d76fd81e470fef75325f81a1d30a1a4d3db29c0180b480x8218b58f40684242022-08-08 17:50:1619 hrs 57 mins ago0x8983ca3d0d1a40ced4351d3b043506cac08db5d9 IN  XY Finance: Aggregator V20 CRO1.5041334257140
0xa9ceca91580b08099dbcb679173a5c80df84d0d8a565b6c039a6ff65b424906e0x8218b58f40657652022-08-08 13:38:071 day 9 mins ago0x847ea241efc72d543b9ccad92fd0c40dc07cc3a4 IN  XY Finance: Aggregator V20 CRO1.086730439808 4,946.383919164
0x0cf804713db826e0cda1356e30b7cba06878d2cf02ac5ec5c46c5e25106973620x8218b58f40655792022-08-08 13:20:291 day 27 mins ago0xa090220ec6d17dc9ddcd683ed234668492da262a IN  XY Finance: Aggregator V20 CRO1.7002072721840
0x9df1e472dcee18d4f3a8fb70251c2c301b19ea9466e709f89f2c6788d6dec4a40x8218b58f40655702022-08-08 13:19:371 day 28 mins ago0xa090220ec6d17dc9ddcd683ed234668492da262a IN  XY Finance: Aggregator V20 CRO1.7002074047460
0xc7abf874dd4788ae5c9e366d6205323a6d364eb3c8eba96c399f5e97acc286b00x8218b58f40622442022-08-08 8:02:241 day 5 hrs ago0x2c9a5dc1b1003e52c93286cb7a0aed3ef3a52344 IN  XY Finance: Aggregator V20 CRO2.029481942560
0x8213d4d3de6ff787d45e43664d8d4c324b96ecd23d1901439fa6000f035044c10x8218b58f40621802022-08-08 7:56:211 day 5 hrs ago0x2c9a5dc1b1003e52c93286cb7a0aed3ef3a52344 IN  XY Finance: Aggregator V20 CRO2.0294831334990
0x2b1c598796a0ebfc4a16cee1b5387ed160f5a95731bbb338cc4ea100e740fc6b0x8218b58f40549322022-08-07 20:32:121 day 17 hrs ago0x8df03f8eda50efcd83ed41eb1ba3103f69281de3 IN  XY Finance: Aggregator V20 CRO0.31660487324 4,946.873849479
0x88a6af2539dcc52b38b2672b1ac6a5489e59aed6389cf1ca7abe7711be8851830x8218b58f40508762022-08-07 14:08:521 day 23 hrs ago0x1ae679b051a45c91f7217cec91113fab363e44da IN  XY Finance: Aggregator V25,461.983585093701724 CRO1.4639670174960
0xdebb6c1ccc6c8140db8c33bb0d4cb69462c465202d21fae994d3bc1dacace14f0x8218b58f40491302022-08-07 11:24:072 days 2 hrs ago0x67e9f8183faee8c9964e5d221f72dca073941d4b IN  XY Finance: Aggregator V220 CRO1.367002888751 4,947.137356966
0xbb4acbd16b7426ffe6ca1fb529d1eb6fb97d2e60193c840cfa050f479ecd10cc0x8218b58f40474812022-08-07 8:48:242 days 4 hrs ago0xdaca296af4e0339b9b6fced4890141d3841da90b IN  XY Finance: Aggregator V20 CRO4.071403430949 4,947.213602152
0xa3053ecb0144a46b396126885d242f35e12f73c3e0e21ac31cb3e75dbbc02d2d0x8218b58f40472932022-08-07 8:30:342 days 5 hrs ago0xdaca296af4e0339b9b6fced4890141d3841da90b IN  XY Finance: Aggregator V26,814.599326374510562 CRO7.186021024463 4,948.147221384
0x24834e89d9cb60e101ebf8befffd39e8fd962dba5b9bb9825eeaa39e618783910x8218b58f40472712022-08-07 8:28:302 days 5 hrs ago0xdaca296af4e0339b9b6fced4890141d3841da90b IN  XY Finance: Aggregator V20 CRO1.107856434455 4,947.223231987
0xc417d1a6200f93623b4eb0ac4aa3bc10b1b8fc12e97d288e50151d542523f97d0x8218b58f40448642022-08-07 4:41:322 days 9 hrs ago0x9f94ab02b8d66ecfa1f414c7c9bc5131dec291b9 IN  XY Finance: Aggregator V2100 CRO1.7108982242120
0x906b4467c9e70a2a277a9f8acac3ceb4410cc62cdfe69ee38c0a1ed5cfb792440x8218b58f40438322022-08-07 3:04:112 days 10 hrs ago0x04b2caea76b1f0068b6434a9712309d9fb7f8275 IN  XY Finance: Aggregator V220 CRO1.3670711154 4,947.384266907
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xfc900f0161d8743721a6c8705ef1d517b11d974e51ad8f933683f399625c77f340688612022-08-08 18:31:4219 hrs 15 mins ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af89701220 CRO
0xf82c64e9ddb3efd11e2e756c603003f1a9cea533009240c5b787e6b1ff2560c640684472022-08-08 17:52:2819 hrs 55 mins ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af8970110 CRO
0x88a6af2539dcc52b38b2672b1ac6a5489e59aed6389cf1ca7abe7711be88518340508762022-08-07 14:08:521 day 23 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af897015,461.983585093701724594 CRO
0xdebb6c1ccc6c8140db8c33bb0d4cb69462c465202d21fae994d3bc1dacace14f40491302022-08-07 11:24:072 days 2 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af8970120 CRO
0xa3053ecb0144a46b396126885d242f35e12f73c3e0e21ac31cb3e75dbbc02d2d40472932022-08-07 8:30:342 days 5 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af897016,814.599326374510562199 CRO
0xc417d1a6200f93623b4eb0ac4aa3bc10b1b8fc12e97d288e50151d542523f97d40448642022-08-07 4:41:322 days 9 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af89701100 CRO
0x906b4467c9e70a2a277a9f8acac3ceb4410cc62cdfe69ee38c0a1ed5cfb7924440438322022-08-07 3:04:112 days 10 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af8970120 CRO
0x6f2e06a2b73c732a2ef724fe4fcb914fde98740255067f15ff6a1bb9a254b0bc40378132022-08-06 17:35:582 days 20 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af8970120 CRO
0x770acb7ee135cc2515519f53651afb4e5b46e7af9384363c62e92a8b8526ef1f40375312022-08-06 17:09:172 days 20 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af897011,275.999669477199323326 CRO
0x02f414019fd6fccb6e90afd428f29bf17b18c89be0f0088277aa424a8da78e8c40375212022-08-06 17:08:212 days 20 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af897011,277.710990277251498148 CRO
0x99c6473c5250a2f866691d2a6e1ef6c9e8158aacfa421b7aaad0638ea85e78b140370472022-08-06 16:23:292 days 21 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af89701190.3759829694503416 CRO
0x700ff4e5d4d3006bb8783175e453a0922f02bd9afcff8084ee970e06ab1938d740369742022-08-06 16:16:362 days 21 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af89701246 CRO
0x9744880414fe8a389a4fbf7246cf7daf95f18d7e10f8c4fe4c4d4a963acfa27940367402022-08-06 15:54:312 days 21 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af89701250 CRO
0x1961da7f0fde1428b9a13c5895510b963420bcc7fd879fdc5dc743e6b453052340336532022-08-06 11:03:043 days 2 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af897011,980.706448988122048241 CRO
0x35c273064c06db96c280c12db4a8b88ca6c03fb390eea730fe6b1003d27efc4b40314222022-08-06 7:32:223 days 6 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af89701253.259 CRO
0x2dde13136664d9506296735aa174b5f27914cccfd807b747cc8cc5fb3f781ff740107412022-08-04 23:00:174 days 14 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af89701183.74 CRO
0x17eb796eb446321cb72691bb624e1c6fe6551d598e98bc4ace58ba399cd3a0a640107172022-08-04 22:58:004 days 14 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af89701187.3917 CRO
0xf6311bf303dcf89244f736f05c543f188dc0b5a87fcae2b4204c3478c74e269740106532022-08-04 22:51:584 days 14 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af89701189.132 CRO
0xf7541a0d4077eb7598d773dc0f42907cefb0006944447a6b154ffe318133cecd40100622022-08-04 21:56:074 days 15 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af897011,000 CRO
0x5eee78ed46b3888adcf9f804b9366d2f54df751614fca428ddfb6bf35640181040088052022-08-04 19:57:294 days 17 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af8970160 CRO
0xcced1aab839c4d7136ba6df2caa13dcdc76abb26cd485b0ca825c515db2c6cc840074112022-08-04 17:45:464 days 20 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af8970120 CRO
0x58f205fd4ff9b35593376bb3314c124f141e83ebd47ecab2fe18d05193039cbf40073062022-08-04 17:35:524 days 20 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af8970130 CRO
0x9f97594b5e0c2e5310fdd537b0a72d0ffb97ecf5472d72a64ba531e425e7284039990072022-08-04 4:31:175 days 9 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af89701350 CRO
0x682690d7890a200b1c1712dca33ee48eb571b1434b8b5e718c0acf036d7e937739922562022-08-03 17:53:035 days 19 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af897015,558.887846583958962351 CRO
0xa752c00fe52731b493416d8be651523a583aceab73c97b06d139c7178c65cc7539921792022-08-03 17:45:415 days 20 hrs ago XY Finance: Aggregator V2 0x2f6ccc4a900ee42f822892b8c024aaa08af8970115 CRO
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Contract Source Code Verified (Exact Match)

Contract Name:
AggregatorSingleChain

Compiler Version
v0.8.2+commit.661d1103

Optimization Enabled:
Yes with 200 runs

Other Settings:
istanbul EvmVersion, None license

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 16 : AggregatorSingleChain.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.2;

import { Address } from "Address.sol";
import "SafeERC20.sol";
import "ERC20.sol";
import "SafeMath.sol";
import "AccessControl.sol";
import "ReentrancyGuard.sol";
import "IAggregator.sol";
import "UniERC20.sol";


/// @title AggregatorSingleChain is the single-chain version of Aggregator. It exchanges assets based on swap description struct
/// @notice Users can call `swap` method to swap assets
/// AggregatorSingleChain will forward the swap description to `caller` contract to perform multi-swap of assets
contract AggregatorSingleChain is IAggregator, AccessControl, ReentrancyGuard {
    using SafeERC20 for IERC20;
    using UniERC20 for IERC20;

    /* ========== STATE VARIABLES ========== */

    // ROLE_OWNER is superior to ROLE_STAFF
    bytes32 public constant ROLE_OWNER = keccak256("ROLE_OWNER");
    bytes32 public constant ROLE_STAFF = keccak256("ROLE_STAFF");

    /// A contract that performs multi-swap according to given input data
    /// See Multicaller.sol for more info
    address payable public caller;


    /* ========== CONSTRUCTOR ========== */

    /// @dev Constuctor with owner / staff / caller
    /// @param owner The owner address
    /// @param staff The staff address
    /// @param _caller The caller contract address (MUST be a contract)
    constructor(address owner, address staff, address payable _caller) {
        _setRoleAdmin(ROLE_OWNER, ROLE_OWNER);
        _setRoleAdmin(ROLE_STAFF, ROLE_OWNER);
        _setupRole(ROLE_OWNER, owner);
        _setupRole(ROLE_STAFF, staff);

        require(Address.isContract(_caller), "ERR_MULTICALLER_NOT_CONTRACT");
        caller = _caller;
    }

    /* ========== RESTRICTED FUNCTIONS ========== */

    /// @notice Set caller address (could be set only by staff)
    /// @param _caller The multicaller contract address that performs multi-swap
    function setCaller(address payable _caller) external onlyRole(ROLE_STAFF) {
        require(Address.isContract(_caller), "ERR_MULTICALLER_NOT_CONTRACT");
        caller = _caller;
    }

    /* ========== WRITE FUNCTIONS ========== */

    /// @notice Swap and check if it's done correctly according to swap description `desc`
    /// This function transfers asset from sender `msg.sender` and then call multicaller contract `caller` to perform multi-swap,
    /// and checks `minReturnAmount` in `desc` to ensure enough amount of desired token `toToken` is received after the swap.
    /// @param desc The description of the swap. See IAggregator.sol for more info.
    /// @param data Bytecode to execute the swap, forwarded to `caller`
    /// @return Received amount of `toToken` after the swap
    function swap(
        SwapDescription calldata desc,
        bytes calldata data
    )
        external
        override
        payable
        nonReentrant
        returns (uint256)
    {
        require(desc.minReturnAmount > 0, "Min return should not be 0");
        require(data.length > 0, "data should be not zero");

        IERC20 fromToken = desc.fromToken;
        IERC20 toToken = desc.toToken;

        require(msg.value == (fromToken.isETH() ? desc.amount : 0), "Invalid msg.value");

        uint256 amount = desc.amount;
        if (!fromToken.isETH()) {
            amount = fromToken.balanceOf(caller);
            fromToken.safeTransferFrom(msg.sender, caller, desc.amount);
            amount = fromToken.balanceOf(caller) - amount;
        }

        require(desc.receiver != address(0), "Invalid receiver");
        address receiver = desc.receiver;
        uint256 toTokenBalance = toToken.uniBalanceOf(receiver);

        Address.functionCallWithValue(caller, data, msg.value, "Caller multiswap failed");

        uint256 returnAmount = toToken.uniBalanceOf(receiver) - toTokenBalance;
        require(returnAmount >= desc.minReturnAmount, "Return amount is not enough");

        emit Swapped(
            msg.sender,
            fromToken,
            toToken,
            receiver,
            amount,
            returnAmount
        );
        return returnAmount;
    }

    /* ========== EVENTS ========== */

    event Swapped(
        address sender,
        IERC20 fromToken,
        IERC20 toToken,
        address receiver,
        uint256 spentAmount,
        uint256 returnAmount
    );
}

File 2 of 16 : Address.sol
// 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);
            }
        }
    }
}

File 3 of 16 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "IERC20.sol";
import "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");
        }
    }
}

File 4 of 16 : IERC20.sol
// 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);
}

File 5 of 16 : ERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "IERC20.sol";
import "IERC20Metadata.sol";
import "Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

File 6 of 16 : IERC20Metadata.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

File 7 of 16 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

File 8 of 16 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

File 9 of 16 : AccessControl.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "IAccessControl.sol";
import "Context.sol";
import "Strings.sol";
import "ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role, _msgSender());
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(uint160(account), 20),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    function _grantRole(bytes32 role, address account) private {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    function _revokeRole(bytes32 role, address account) private {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

File 10 of 16 : IAccessControl.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

File 11 of 16 : Strings.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

File 12 of 16 : ERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

File 13 of 16 : IERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

File 14 of 16 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

File 15 of 16 : IAggregator.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.2;
pragma experimental ABIEncoderV2;

import { IERC20 } from "ERC20.sol";


interface IAggregator {
    struct SwapDescription {
        IERC20 fromToken;
        IERC20 toToken;
        address receiver;
        uint256 amount;
        uint256 minReturnAmount;
    }
    function swap(SwapDescription calldata desc, bytes calldata data) external payable returns (uint256 returnAmount);
}

File 16 of 16 : UniERC20.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.2;

import "ERC20.sol";

/// @title Library for unifying getting balance in one interface
/// @notice Use `uniBalanceOf` to get amount of the desired token or native token balance
library UniERC20 {

    // native token addresses
    address private constant _ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
    address private constant _ZERO_ADDRESS = address(0);

    /// @notice Check if the given token address is native token
    /// @param token The token address to be checked
    /// @return `true` if native token, otherwise `false`
    function isETH(IERC20 token) internal pure returns (bool) {
        return (address(token) == _ZERO_ADDRESS || address(token) == _ETH_ADDRESS);
    }

    /// @notice Get balance of the desired account address of the given token
    /// @param token The token address to be checked
    /// @param account The address to be checked
    /// @return The token balance of the desired account address
    function uniBalanceOf(IERC20 token, address account) internal view returns (uint256) {
        if (isETH(token)) {
            return account.balance;
        } else {
            return token.balanceOf(account);
        }
    }
}

Settings
{
  "evmVersion": "istanbul",
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "libraries": {
    "AggregatorSingleChain.sol": {}
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

Contract ABI

[{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"staff","type":"address"},{"internalType":"address payable","name":"_caller","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"contract IERC20","name":"fromToken","type":"address"},{"indexed":false,"internalType":"contract IERC20","name":"toToken","type":"address"},{"indexed":false,"internalType":"address","name":"receiver","type":"address"},{"indexed":false,"internalType":"uint256","name":"spentAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"returnAmount","type":"uint256"}],"name":"Swapped","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ROLE_OWNER","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ROLE_STAFF","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"caller","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address payable","name":"_caller","type":"address"}],"name":"setCaller","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"contract IERC20","name":"fromToken","type":"address"},{"internalType":"contract IERC20","name":"toToken","type":"address"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"minReturnAmount","type":"uint256"}],"internalType":"struct IAggregator.SwapDescription","name":"desc","type":"tuple"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"swap","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"payable","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000000132613b3a1061816f4661ad301612910e3cce0b0000000000000000000000000132613b3a1061816f4661ad301612910e3cce0b0000000000000000000000002f6ccc4a900ee42f822892b8c024aaa08af89701

-----Decoded View---------------
Arg [0] : owner (address): 0x0132613b3a1061816f4661ad301612910e3cce0b
Arg [1] : staff (address): 0x0132613b3a1061816f4661ad301612910e3cce0b
Arg [2] : _caller (address): 0x2f6ccc4a900ee42f822892b8c024aaa08af89701

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000000132613b3a1061816f4661ad301612910e3cce0b
Arg [1] : 0000000000000000000000000132613b3a1061816f4661ad301612910e3cce0b
Arg [2] : 0000000000000000000000002f6ccc4a900ee42f822892b8c024aaa08af89701


Deployed ByteCode Sourcemap

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Swarm Source

ipfs://b3c74dd65c60b8cc76b335007867c73f0726a3f2c7160b3381499c55842660b4
Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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