Contract 0x23396cf899ca06c4472205fc903bdb4de249d6fc 4

 

Contract Overview

Mirror Protocol: UST Token
Balance:
0 BNB

BNB Value:
$0.00

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x846caf4f9a7c43c2ea4b224f76218c951ae6d4e1555b9df9058be7e0e92ec939Burn121170742021-10-26 21:00:4838 secs ago0xa37dd7c67c5c985aa56f7cf362b29d83c3f36816 IN  Mirror Protocol: UST Token0 BNB0.000189995
0x7aa54416310b037141317d4ae5893544f3fb3e6153127b77e3f9f4ef2fae320bBurn121170622021-10-26 21:00:071 min ago0x7450abfd0747efa34dd6c6704ed01b777f364a9f IN  Mirror Protocol: UST Token0 BNB0.000189935
0xb225cef90fb9aee68d34aea83b5eac3b467d7091af8313f2602d867010c9c35aApprove121170492021-10-26 20:59:242 mins ago0xb1d2c9c7766e40df7bb5e74bba15d91560e232d8 IN  Mirror Protocol: UST Token0 BNB0.000222545
0x89eb4f1bcc3e7e641c11026a881201a1e67e236a4c3051d70dbc786a3a76ce6aBurn121170402021-10-26 20:58:552 mins ago0x17fdfd2021adcbfb649f86cff7a08d6a0eeb7706 IN  Mirror Protocol: UST Token0 BNB0.000189995
0xcb0d478a0ef35b3dbabf166107bafc744100e4b3977b5bf937c3e2f85f6658ecApprove121170182021-10-26 20:57:413 mins ago0xe6d8d5747a878a3ad4acb1abfaf58cd8d02c25b2 IN  Mirror Protocol: UST Token0 BNB0.000072815
0xa3ff60cbd73c70d969d962b2dc11981f59431040d58fc2353f6a296db80a9766Burn121170072021-10-26 20:57:084 mins ago0x8129d51d6468418b4cbbdefe2d0392dc6c80920b IN  Mirror Protocol: UST Token0 BNB0.000190055
0x4378644ed5d185642e9e00f3a7c28a23e0b7059198d0e3dbe4b79348e648c350Burn121170002021-10-26 20:56:474 mins ago0xbe7320902ddc545b53f030f34f3f91af1ae4e711 IN  Mirror Protocol: UST Token0 BNB0.000189995
0x7dae40415fcd5065682b125e03034588957943aeb56c558d1d0ab33a2d4e4abaBurn121169952021-10-26 20:56:324 mins ago0x3b509c9642859537d3023db8f92e4e7be4e0f7f8 IN  Mirror Protocol: UST Token0 BNB0.000189995
0xdd972ecf25e3064f3f1e20f22d435c7ae5827cda77249813d687d81269cc7c38Approve121169902021-10-26 20:56:175 mins ago0xe96fe3bfce5e53adce2f15330e36fd60a0857f36 IN  Mirror Protocol: UST Token0 BNB0.000222545
0xbc000b11421f7c9c9c37ece5fbffed006fae25c607d963ea508e45a12c59b39aBurn121169802021-10-26 20:55:475 mins ago0x17fdfd2021adcbfb649f86cff7a08d6a0eeb7706 IN  Mirror Protocol: UST Token0 BNB0.000189995
0x258418dfa82e5cc81388c3e3456134225687f3e3571bb14fce521e9b818f67e0Burn121169592021-10-26 20:54:446 mins ago0xa27060acc6682495bc14a48a992f7f781f4c1ba1 IN  Mirror Protocol: UST Token0 BNB0.000190055
0x7df379ef5ddadd5764683960ce68287a1ab6373d9b58c860da2c05230687d599Burn121169162021-10-26 20:52:358 mins ago0xc990d1c44119501dcef3315f013b3b1764389a4b IN  Mirror Protocol: UST Token0 BNB0.000190055
0x7b0eff2c14394977df2bc839e6fd1ff41a73cf913682151e02de5d6f661dd748Transfer121169112021-10-26 20:52:209 mins ago0xbf1a6a56e305f02af960c55fa153f7ccffc98ecd IN  Mirror Protocol: UST Token0 BNB0.000181625
0x5aaad958730356529546b9b664c9566754728490145f5a7521b964a67869ab2bBurn121168802021-10-26 20:50:4710 mins ago0x5493ae0aab9766e4dc048bd1800e1a99826ca5ea IN  Mirror Protocol: UST Token0 BNB0.000190055
0x818cabb9f3fc3077dc10cf4b4c32e6b41a9cb394775160cc583d09bff5480330Transfer121168772021-10-26 20:50:3810 mins ago0xa29cb010164e9fdf37b982bbaa9b90ca9af63272 IN  Mirror Protocol: UST Token0 BNB0.000181685
0xe90145e1fc0ebed88052d1cf3afdf04ed3bb057f135a49f8f1c752a12e7097f1Burn121168452021-10-26 20:49:0212 mins ago0x0987fbd3c357fb724b5e6b875ccd272f69c909ca IN  Mirror Protocol: UST Token0 BNB0.000189995
0x3fdfb921c3d222d88bca3faebd4e1757eb527fe6cdc1ff1103150b63e7d831d7Burn121168242021-10-26 20:47:5913 mins ago0x4a2d7da70ec8deb5dc8018190a1b66ce5dd84449 IN  Mirror Protocol: UST Token0 BNB0.000190055
0xc4d8c35ac15801202a462867b77541477f43493ea3f60235fc5fae0cb568b067Burn121167742021-10-26 20:45:2915 mins ago0x9291adf3562ffd458345860a8617aebc7ed69188 IN  Mirror Protocol: UST Token0 BNB0.000190055
0xfc6db58be8bc18b5733cb9ff37d563b5898046ac80b145f23fe8ac778e049a9dBurn121167472021-10-26 20:44:0817 mins ago0xeacada84622dbf33eb61c27c4048b2b122792824 IN  Mirror Protocol: UST Token0 BNB0.000190055
0xe08a48dad1bee7e7c8437f94476b78c2f0d5a958c84dee6c8e6ddce8a3088c96Approve121167402021-10-26 20:43:4717 mins ago0xcaf94d7aa8007436d83ddfd8239ca6e69f6579a8 IN  Mirror Protocol: UST Token0 BNB0.000222545
0x512b0a15140fa58035588120d6fde8babe8f284a87c17c412fa3051afb365252Approve121166942021-10-26 20:41:2919 mins ago0x9c2d27eeb0d901293288e50947e7b62097a91450 IN  Mirror Protocol: UST Token0 BNB0.000072815
0x8fc2a43be7bc29afd09cbe6f3ac23517e41c6e8403091e9a62892d30bbbd308bBurn121166772021-10-26 20:40:3820 mins ago0xe1ba0be0d6743cf78185d1df6f4c01dfdeea89d6 IN  Mirror Protocol: UST Token0 BNB0.000190055
0x98ca95c38887c7b74f51e83a3b971f017d19c4b3ac216327467438fa3262138bBurn121166472021-10-26 20:39:0822 mins ago0x981ec3ba5d06c4b0ab5b1f0b4d86050bbd83eebd IN  Mirror Protocol: UST Token0 BNB0.000190055
0xa3a30a8cc2ab0ba953640fc253747a445c0ed9527d256fef420145dffec19b79Approve121165992021-10-26 20:36:4424 mins ago0x207ab8c942cfe455d28e1517742be1fba0d5df24 IN  Mirror Protocol: UST Token0 BNB0.000267054
0xd0fac725ef8aa33c9c24b0985bd06f9007e058970f6cc1aad49aa9bf4da46424Approve121165712021-10-26 20:35:2026 mins ago0xdeeb5c43dd9b8d1ba200b534f6ebdfc7635235ea IN  Mirror Protocol: UST Token0 BNB0.000267054
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OVERVIEW

TerraUSD is a decentralized stablecoin that is scalable, yield bearing and interchain (1 UST = 1 USD)

Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x0d0d30ea7a88312e1f048e69d6f7d4b68b188de9ee05f42289a28bb6d86bcb3854713292021-03-07 11:59:24233 days 9 hrs ago PancakeSwap: UST-mNFLX Mirror Protocol: UST Token0 BNB
0x0d0d30ea7a88312e1f048e69d6f7d4b68b188de9ee05f42289a28bb6d86bcb3854713292021-03-07 11:59:24233 days 9 hrs ago PancakeSwap: Router Mirror Protocol: UST Token0 BNB
0x847fc369f6b08532dc5bb236c3590862610a660143de6ffb65d1c1db5584853f54713272021-03-07 11:59:18233 days 9 hrs ago 0x6efa207acde6e1cab77c1322cbde9628929ba88f Mirror Protocol: UST Token0 BNB
0x1c436bb16a6e9818f8a41fe746745741c7e2d7cc8ac7720b76328ab2be17567254713022021-03-07 11:58:03233 days 9 hrs ago PancakeSwap: UST-mNFLX Mirror Protocol: UST Token0 BNB
0x1c436bb16a6e9818f8a41fe746745741c7e2d7cc8ac7720b76328ab2be17567254713022021-03-07 11:58:03233 days 9 hrs ago PancakeSwap: UST-BUSD Mirror Protocol: UST Token0 BNB
0x1c436bb16a6e9818f8a41fe746745741c7e2d7cc8ac7720b76328ab2be17567254713022021-03-07 11:58:03233 days 9 hrs ago PancakeSwap: UST-BUSD Mirror Protocol: UST Token0 BNB
0x201298b0223976695051733dffc363d7822744e5c5074d4f31b00ea361161d7454713022021-03-07 11:58:03233 days 9 hrs ago PancakeSwap: UST-mNFLX Mirror Protocol: UST Token0 BNB
0x201298b0223976695051733dffc363d7822744e5c5074d4f31b00ea361161d7454713022021-03-07 11:58:03233 days 9 hrs ago PancakeSwap: UST Mirror Protocol: UST Token0 BNB
0x201298b0223976695051733dffc363d7822744e5c5074d4f31b00ea361161d7454713022021-03-07 11:58:03233 days 9 hrs ago PancakeSwap: UST Mirror Protocol: UST Token0 BNB
0xd31c1bc8dfc898f2d8591757ba8531768340de0ce4f340f1efbadbed59c163a454712892021-03-07 11:57:24233 days 9 hrs ago PancakeSwap: UST-BUSD Mirror Protocol: UST Token0 BNB
0xd31c1bc8dfc898f2d8591757ba8531768340de0ce4f340f1efbadbed59c163a454712892021-03-07 11:57:24233 days 9 hrs ago PancakeSwap: UST-BUSD Mirror Protocol: UST Token0 BNB
0xd88aa7a83d56110f793e95b26bdad7fd28baf3bb000c46b458e58500cf42361f54712462021-03-07 11:55:15233 days 9 hrs ago PancakeSwap: UST-BUSD Mirror Protocol: UST Token0 BNB
0xd88aa7a83d56110f793e95b26bdad7fd28baf3bb000c46b458e58500cf42361f54712462021-03-07 11:55:15233 days 9 hrs ago PancakeSwap: Router Mirror Protocol: UST Token0 BNB
0xc8bc0e1fa5ca5f02868b3574a9fcd7c8652ec012a788e079b705cc9b0e8b3e7e54712452021-03-07 11:55:12233 days 9 hrs ago PancakeSwap: UST-BUSD Mirror Protocol: UST Token0 BNB
0xc8bc0e1fa5ca5f02868b3574a9fcd7c8652ec012a788e079b705cc9b0e8b3e7e54712452021-03-07 11:55:12233 days 9 hrs ago PancakeSwap: UST Mirror Protocol: UST Token0 BNB
0xc8bc0e1fa5ca5f02868b3574a9fcd7c8652ec012a788e079b705cc9b0e8b3e7e54712452021-03-07 11:55:12233 days 9 hrs ago PancakeSwap: UST Mirror Protocol: UST Token0 BNB
0x9127bc0bc6aafe27afc40c8924a501b57a7553fb22fa0468a769d332d38b489f54712442021-03-07 11:55:09233 days 9 hrs ago PancakeSwap: UST-BUSD Mirror Protocol: UST Token0 BNB
0x9127bc0bc6aafe27afc40c8924a501b57a7553fb22fa0468a769d332d38b489f54712442021-03-07 11:55:09233 days 9 hrs ago PancakeSwap: UST Mirror Protocol: UST Token0 BNB
0x9127bc0bc6aafe27afc40c8924a501b57a7553fb22fa0468a769d332d38b489f54712442021-03-07 11:55:09233 days 9 hrs ago PancakeSwap: UST Mirror Protocol: UST Token0 BNB
0xd8add81bfce3c5f66d8f93ab73a519912ea9b572604e107e175dacaad8e16afc54712402021-03-07 11:54:57233 days 9 hrs ago PancakeSwap: UST-BUSD Mirror Protocol: UST Token0 BNB
0xd8add81bfce3c5f66d8f93ab73a519912ea9b572604e107e175dacaad8e16afc54712402021-03-07 11:54:57233 days 9 hrs ago PancakeSwap: UST Mirror Protocol: UST Token0 BNB
0xd8add81bfce3c5f66d8f93ab73a519912ea9b572604e107e175dacaad8e16afc54712402021-03-07 11:54:57233 days 9 hrs ago PancakeSwap: UST Mirror Protocol: UST Token0 BNB
0xfaf56a556a7d69ea2830a3fd0644b9939e42f99c0ed9838623503a81d596943c54712392021-03-07 11:54:54233 days 9 hrs ago PancakeSwap: UST-BUSD Mirror Protocol: UST Token0 BNB
0xfaf56a556a7d69ea2830a3fd0644b9939e42f99c0ed9838623503a81d596943c54712392021-03-07 11:54:54233 days 9 hrs ago PancakeSwap: UST Mirror Protocol: UST Token0 BNB
0xfaf56a556a7d69ea2830a3fd0644b9939e42f99c0ed9838623503a81d596943c54712392021-03-07 11:54:54233 days 9 hrs ago PancakeSwap: UST Mirror Protocol: UST Token0 BNB
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Contract Source Code Verified (Exact Match)

Contract Name:
WrappedUST

Compiler Version
v0.6.2+commit.bacdbe57

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 7 : WrappedToken.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract WrappedToken is ERC20, Ownable {
    event Burn(address indexed _sender, bytes32 indexed _to, uint256 amount);

    constructor(string memory name, string memory symbol)
        public
        ERC20(name, symbol)
    {}

    function burn(uint256 amount, bytes32 to) public {
        _burn(_msgSender(), amount);

        emit Burn(_msgSender(), to, amount);
    }

    function mint(address account, uint256 amount) public onlyOwner {
        _mint(account, amount);
    }
}

contract WrappedLuna is WrappedToken {
    constructor() public WrappedToken("Wrapped LUNA Token", "LUNA") {}
}

contract WrappedUST is WrappedToken {
    constructor() public WrappedToken("Wrapped UST Token", "UST") {}
}

contract WrappedKRT is WrappedToken {
    constructor() public WrappedToken("Wrapped KRT Token", "KRT") {}
}

contract WrappedSDT is WrappedToken {
    constructor() public WrappedToken("Wrapped SDT Token", "SDT") {}
}

contract WrappedMNT is WrappedToken {
    constructor() public WrappedToken("Wrapped MNT Token", "MNT") {}
}

contract WrappedMIR is WrappedToken {
    constructor() public WrappedToken("Wrapped MIR Token", "MIR") {}
}

contract WrappedmAAPL is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror AAPL Token", "mAAPL") {}
}

contract WrappedmGOOGL is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror GOOGL Token", "mGOOGL") {}
}

contract WrappedmTSLA is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror TSLA Token", "mTSLA") {}
}

contract WrappedmNFLX is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror NFLX Token", "mNFLX") {}
}

contract WrappedmQQQ is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror QQQ Token", "mQQQ") {}
}

contract WrappedmTWTR is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror TWTR Token", "mTWTR") {}
}

contract WrappedmMSFT is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror MSFT Token", "mMSFT") {}
}

contract WrappedmAMZN is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror AMZN Token", "mAMZN") {}
}

contract WrappedmBABA is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror BABA Token", "mBABA") {}
}

contract WrappedmIAU is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror IAU Token", "mIAU") {}
}

contract WrappedmSLV is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror SLV Token", "mSLV") {}
}

contract WrappedmUSO is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror USO Token", "mUSO") {}
}

contract WrappedmVIXY is WrappedToken {
    constructor() public WrappedToken("Wrapped Mirror VIXY Token", "mVIXY") {}
}

File 2 of 7 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/*
 * @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 GSN 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 payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

File 3 of 7 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "../GSN/Context.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
contract Ownable is Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

File 4 of 7 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @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) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @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 sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @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) {
        // 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 0;
        }

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

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts 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) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts 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) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts 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 mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

File 5 of 7 : ERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "../../GSN/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.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 guidelines: functions revert instead
 * of 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 {
    using SafeMath for uint256;
    using Address for address;

    mapping (address => uint256) private _balances;

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name, string memory symbol) public {
        _name = name;
        _symbol = symbol;
        _decimals = 18;
    }

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

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view 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 {_setupDecimals} is
     * called.
     *
     * 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 returns (uint8) {
        return _decimals;
    }

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

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view 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);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        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].add(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) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is 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);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(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
     *
     * - `to` 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 = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(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);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(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 Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal {
        _decimals = decimals_;
    }

    /**
     * @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 to 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 { }
}

File 6 of 7 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @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 7 of 7 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.2;

/**
 * @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 in extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

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

Contract Security Audit

Contract ABI

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_sender","type":"address"},{"indexed":true,"internalType":"bytes32","name":"_to","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Burn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes32","name":"to","type":"bytes32"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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