Contract 0xf933e32e94e5467bc28dc60b66f368dd7e056be3

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Balance:
0 BNB

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0xbde452af77e6489bf9d01bbcf9c5e3ae177893fe2fd0f1a04036e0ee50bd7eadApprove97697752021-06-16 1:24:11100 days 1 hr ago0xc5586d040f113752cdd6b439bfc1ce298333bb17 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x34cac13a3c45088f702719ba5df653a1703693da5aac66fcfdb719a30b37db8eApprove95406422021-06-08 2:26:53108 days 18 mins ago0xb4e6aecd3d8cc8b5f0f0225b4c52fdfef3b7d311 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x47a7539bbe1910c8fd3ac7484292e356578a61645b9b98e04ee849ca4642c6e9Approve95305112021-06-07 18:00:20108 days 8 hrs ago0xd86183bce1de4d57bcc97c786aec75b78ad1edaa IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0xbff5bbf143c4e7137bcddbbacbdfb3bf19310b678fdd8410783d99b7ec4cf673Approve95278962021-06-07 15:49:35108 days 10 hrs ago0x8acab1c8f52ae43a9024f09b1276e8d798440ec9 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x80ec6b73aa8fb0fe8cb6845a77ea838ab2b83fdc2c2d5280a0d5c3363f6fc564Approve95261902021-06-07 14:23:51108 days 12 hrs ago0xbc1e7b8be8dd10d41306ad9df3622c4731b254b0 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x026f80cd1c8a4c94c7ba2d67f8c7fb6291411fadb7eb13c99812c5d0d27398f9Approve95259302021-06-07 14:10:51108 days 12 hrs ago0xbc1e7b8be8dd10d41306ad9df3622c4731b254b0 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x3c2fdee67e553555b1495995171c2d63460c7409b4be2759594267a5f883893eTransfer95214452021-06-07 10:26:36108 days 16 hrs ago0x064516bbe709fd1d41c4274ff318ba541c854395 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00051213
0xf4b7fb0929ac82976edc27757bb8a370917ec02664f5e4d34b33464242ab2657Approve94997722021-06-06 16:22:57109 days 10 hrs ago0x6eaefd87a5134f33ee676510107beeb0af343ff3 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x8bb65b1fa9a6864650da82a8ed77684ed6ad50e507ba3e51590774df902cd8c3Approve94674422021-06-05 13:26:16110 days 13 hrs ago0x66f84285b8b50eca6c295a84f0e92de3493e14a1 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x69716ecd1c73be831d0dc61de7cc925650c8f03bc35587e81788f348e2ea016bApprove94662202021-06-05 12:25:10110 days 14 hrs ago0xe24733603fad3f9d9a53d15dc12c1bbeda95283f IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x390ecff69c459e4834d6fdcd3232493a5d0f5b4b39ec2d350017d07ac9748c62Approve94659972021-06-05 12:14:01110 days 14 hrs ago0xe24733603fad3f9d9a53d15dc12c1bbeda95283f IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x9642331e689ba9b07bb387fa02b970d9fe2ad2e97a25a04ac1027d66796905cbTransfer94644462021-06-05 10:56:28110 days 15 hrs ago0xf2588806fa3a1c11243775672c84230bef8b72a0 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00051201
0x2303c9926a00569f7fcfed2751baed4ed05e974fdedc226158e13c87ed9e5821Approve94644332021-06-05 10:55:49110 days 15 hrs ago0x92e774ded567bd5be5bf5d12bee8fd91ccac561e IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x1fdf92787c0987b2b8668ecc416734f1851e69cd083ae86069067bb066202d6fTransfer94631982021-06-05 9:54:04110 days 16 hrs ago0xf2588806fa3a1c11243775672c84230bef8b72a0 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00051189
0xae73f78300f14760cd8901511f7502b7abbd2da0b06b99a5b4bc41ba3a6e6b44Transfer94626972021-06-05 9:29:01110 days 17 hrs ago0xb7160f1b3b77e1c7af548e699118636e8a16d7ca IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00027801
0x72ee7e084d461145148db88766dc0b9f9b2610e6b294a224f325d21438084cdfApprove94622382021-06-05 9:06:04110 days 17 hrs ago0x9101a10e53734a0f90e87d958890b5782cb3850b IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x7393234724237951197b872ef01f69884439a0262b4fba85c4f534c36cfea08dApprove94604132021-06-05 7:34:49110 days 19 hrs ago0xcd44df9535deb15429547e411f272f51616dca96 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0xabf3de65b666b91ec6999f82a0437f8733378fcd3ce305a5fcf95695695031b6Approve94595652021-06-05 6:52:25110 days 19 hrs ago0x2fcecb77232f1f3b33e7d10e0a3737edb425f1bb IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0xf4f2f38e78ef826e1891543ccba5a4597f6e1cd3438635b959268ae6de162a92Transfer94569832021-06-05 4:43:19110 days 22 hrs ago0xb7160f1b3b77e1c7af548e699118636e8a16d7ca IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00027801
0x5f3e0fa491fdc2f391b912710d648c3c41eea2d8a2a131231be8f989395e7d39Approve94372202021-06-04 12:15:10111 days 14 hrs ago0x169b69ed0fe9e398112b1a7d5923a86cb32e477e IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x644541fdcca2dd0ba8c384c355b592034d4de1700dc4e5adaec841825629363eApprove94371672021-06-04 12:12:31111 days 14 hrs ago0x169b69ed0fe9e398112b1a7d5923a86cb32e477e IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x67f8c5d8ce4ad206fd636adbb0d71c317b1961c1d6d0b1c94b50e6ee8a12d27eTransfer94370652021-06-04 12:07:25111 days 14 hrs ago0x03aa2c4d8cf4bc28643caefad8f4fcba2933ac1e IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00051201
0xe93276f122f4360d535b3746a048b7d85f7ec76906cbb8bcabcc298de57de91fApprove94297572021-06-04 6:01:57111 days 20 hrs ago0x5abf833469d9ddccbc180ff8ee6e06eb86fd7406 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x5cbcd79ad94586fd869232384f0807b65cd5a15a7c05bdc816abe869d6d5e099Approve94259552021-06-04 2:51:51111 days 23 hrs ago0xd80b620c05af362d7457ff925063c9d1710a2d50 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00044406
0x938359fccde37b39f3404c261ea607691c03547f531ee96e88a5aa6ccaf070d8Transfer94003382021-06-03 5:29:30112 days 21 hrs ago0xb139cad8c704d29d93c4f12fdcba8d1a88bca3d2 IN  0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB0.00051201
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0xe2e2d7bf2a014a00367cae7ec16eacf53b47ec9aee9d39f37d54afc1ba1c2673100969462021-06-27 10:03:1388 days 16 hrs ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0xe2e2d7bf2a014a00367cae7ec16eacf53b47ec9aee9d39f37d54afc1ba1c2673100969462021-06-27 10:03:1388 days 16 hrs ago 0x1286d257f183199c487ff6096d26f7b4d0f717a8 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0x5a562f1ef5704a11cd42f23f21b9b3ad9d52decda5a2ba4e33c26afa0d9d30d8100309412021-06-25 3:02:4390 days 23 hrs ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0x5a562f1ef5704a11cd42f23f21b9b3ad9d52decda5a2ba4e33c26afa0d9d30d8100309412021-06-25 3:02:4390 days 23 hrs ago 0x1286d257f183199c487ff6096d26f7b4d0f717a8 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0x35908ea9af33dafddef57f482b879006f7f71dd1e11b7dc14289fb0ad0d2624499549622021-06-22 11:43:4693 days 15 hrs ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0x35908ea9af33dafddef57f482b879006f7f71dd1e11b7dc14289fb0ad0d2624499549622021-06-22 11:43:4693 days 15 hrs ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0xbffd558f5307e7265766155e8b20e0ee2a442fbccadb811ad5b3ba0a0ffe647198844922021-06-20 1:00:1696 days 1 hr ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0xbffd558f5307e7265766155e8b20e0ee2a442fbccadb811ad5b3ba0a0ffe647198844922021-06-20 1:00:1696 days 1 hr ago 0x1286d257f183199c487ff6096d26f7b4d0f717a8 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
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0x1182c48188e3fe23a1a5b1d38099e3fc5bb59ea2d0bc78b6b33b2540759675c798843722021-06-20 0:54:1696 days 1 hr ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
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0x4301fc4223e45b7025df45cd4446c7328d6f104547ce67c33fd661a4a67672ad98818952021-06-19 22:50:2596 days 3 hrs ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
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0x2b91ab033c16a306c0a6e2a6453e756c8e07cb936ef0534e8536d9b0a391d6cc98818402021-06-19 22:47:4096 days 3 hrs ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0x2b91ab033c16a306c0a6e2a6453e756c8e07cb936ef0534e8536d9b0a391d6cc98818402021-06-19 22:47:4096 days 3 hrs ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0x32fef1ded1f022020e5192f950aae635d5d710a2852ce30aba1c748bcd12592698816872021-06-19 22:40:0196 days 4 hrs ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0x32fef1ded1f022020e5192f950aae635d5d710a2852ce30aba1c748bcd12592698816872021-06-19 22:40:0196 days 4 hrs ago 0x1286d257f183199c487ff6096d26f7b4d0f717a8 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0x96d1e6c75f086b1ba46409392a59c6e8dc669fa068eded049725f713b764b04898816512021-06-19 22:38:1396 days 4 hrs ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0x96d1e6c75f086b1ba46409392a59c6e8dc669fa068eded049725f713b764b04898816512021-06-19 22:38:1396 days 4 hrs ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0xf673ce6843648f0fd9849b38433213e80619428f06ee9feabb8b394a3258dccb98815962021-06-19 22:35:2896 days 4 hrs ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0xf673ce6843648f0fd9849b38433213e80619428f06ee9feabb8b394a3258dccb98815962021-06-19 22:35:2896 days 4 hrs ago 0x1286d257f183199c487ff6096d26f7b4d0f717a8 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0x2c829781667aa5b9ea8d3832f7fdced23d910357fbe9568caf0055947010fcc898731202021-06-19 15:31:4096 days 11 hrs ago 0x722db73df18e0a861316298d23ce63f3e2284073 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
0x2c829781667aa5b9ea8d3832f7fdced23d910357fbe9568caf0055947010fcc898731202021-06-19 15:31:4096 days 11 hrs ago 0x1286d257f183199c487ff6096d26f7b4d0f717a8 0xf933e32e94e5467bc28dc60b66f368dd7e056be30 BNB
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Contract Source Code Verified (Similar Match)
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0xaeCAff4d0833cd938b360a86d98c740b15892c7E

Contract Name:
Cash

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 9 : Cash.sol
pragma solidity ^0.6.0;

import '@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol';
import './owner/Operator.sol';

contract Cash is ERC20Burnable, Operator {
    /**
     * @notice Constructs the GAC ERC-20 contract.
     */
    constructor() public ERC20('GAC', 'GAC') {
        // Mints 1 GAC to contract creator for initial oracle deployment.
        // Will be burned after oracle deployment
        _mint(msg.sender, 1 * 10**18);
    }

    //    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
    //        super._beforeTokenTransfer(from, to, amount);
    //        require(
    //            to != operator(),
    //            "basis.cash: operator as a recipient is not allowed"
    //        );
    //    }

    /**
     * @notice Operator mints GAC to a recipient
     * @param recipient_ The address of recipient
     * @param amount_ The amount of GAC to mint to
     * @return whether the process has been done
     */
    function mint(address recipient_, uint256 amount_)
        public
        onlyOperator
        returns (bool)
    {
        uint256 balanceBefore = balanceOf(recipient_);
        _mint(recipient_, amount_);
        uint256 balanceAfter = balanceOf(recipient_);

        return balanceAfter > balanceBefore;
    }

    function burn(uint256 amount) public override onlyOperator {
        super.burn(amount);
    }

    function burnFrom(address account, uint256 amount)
        public
        override
        onlyOperator
    {
        super.burnFrom(account, amount);
    }
}

File 2 of 9 : Operator.sol
pragma solidity ^0.6.0;

import '@openzeppelin/contracts/GSN/Context.sol';
import '@openzeppelin/contracts/access/Ownable.sol';

contract Operator is Context, Ownable {
    address private _operator;

    event OperatorTransferred(
        address indexed previousOperator,
        address indexed newOperator
    );

    constructor() internal {
        _operator = _msgSender();
        emit OperatorTransferred(address(0), _operator);
    }

    function operator() public view returns (address) {
        return _operator;
    }

    modifier onlyOperator() {
        require(
            _operator == msg.sender,
            'operator: caller is not the operator'
        );
        _;
    }

    function isOperator() public view returns (bool) {
        return _msgSender() == _operator;
    }

    function transferOperator(address newOperator_) public onlyOwner {
        _transferOperator(newOperator_);
    }

    function _transferOperator(address newOperator_) internal {
        require(
            newOperator_ != address(0),
            'operator: zero address given for new operator'
        );
        emit OperatorTransferred(address(0), newOperator_);
        _operator = newOperator_;
    }
}

File 3 of 9 : 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 4 of 9 : 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 5 of 9 : 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 6 of 9 : 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 7 of 9 : ERC20Burnable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "../../GSN/Context.sol";
import "./ERC20.sol";

/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");

        _approve(account, _msgSender(), decreasedAllowance);
        _burn(account, amount);
    }
}

File 8 of 9 : 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 9 of 9 : 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": true,
    "runs": 200
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

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":"previousOperator","type":"address"},{"indexed":true,"internalType":"address","name":"newOperator","type":"address"}],"name":"OperatorTransferred","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"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burnFrom","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":[],"name":"isOperator","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient_","type":"address"},{"internalType":"uint256","name":"amount_","type":"uint256"}],"name":"mint","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"operator","outputs":[{"internalType":"address","name":"","type":"address"}],"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":"newOperator_","type":"address"}],"name":"transferOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Block Transaction Gas Used Reward
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