Contract 0xb9c8f0d3254007ee4b98970b94544e473cd610ec 16

 

Contract Overview

QiDao: QI Token
Balance:
0 ETH

ETH Value:
$0.00

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x37edd9c4382cade7113bb23251bf9307119c51dc8d002bdbfd9ac00b46dc2c59Approve1792751322024-02-10 8:58:1814 days 6 hrs ago0x92f2fddd75fc847b9796ab355dae69b131edda82 IN  QiDao: QI Token0 ETH0.00005727 0.1
0x455b49290ae1b8eaead0633a0aa5174bae964a2bd30cf59cda8335dd33332a92Approve1792747342024-02-10 8:56:3814 days 6 hrs ago0x92f2fddd75fc847b9796ab355dae69b131edda82 IN  QiDao: QI Token0 ETH0.00005727 0.1
0x05038dec93f6771dc5325678a86bfb8f93dff277a5d9e54b475f0bdb3bbd1048Approve1790870522024-02-09 19:03:4514 days 20 hrs ago0x3efec9925973afe87cbfe219dfe31fbba4266369 IN  QiDao: QI Token0 ETH0.000156380.1
0x566f6e22e72ee394ef91190f7c0f1beb72773a2351ad725d4ba0e21284d17355Approve1779856902024-02-06 10:59:0418 days 4 hrs ago0x45232d48033b129571062fb05222ef456353253e IN  QiDao: QI Token0 ETH0.000048490.1
0x7a286cd066fa4f746fca4e153c6eb89f7c971c8a9a3ea7d122a98c6f2fb8d729Approve1735425692024-01-24 1:49:3531 days 13 hrs ago0xf949b5edd3ad6180e9933eadc8cc9130aba4972c IN  QiDao: QI Token0 ETH0.00002907 0.1
0xc2c6335e26c8c54a99292478d9a0ee93398dfdd83f291ea5fb962646de6befb8Approve1735265932024-01-24 0:43:1031 days 14 hrs ago0xf949b5edd3ad6180e9933eadc8cc9130aba4972c IN  QiDao: QI Token0 ETH0.00003182 0.1
0x1f8a4c17e1e2a1fa8b2581c67847e43c018175ba15908797fcad8d2c40c67f17Approve1699266602024-01-13 4:03:4342 days 11 hrs ago0xc9c384a9e7e28f7ef55903eb90947fe3ce71d475 IN  QiDao: QI Token0 ETH0.000041090.1
0x79f41d19c22d1482178a0c2474b31674a5231cf1d4739ecc7d48926f9fd311bbApprove1696182502024-01-12 6:19:4043 days 9 hrs ago0x2fcca9685b8b64637d1cb36e20c35b207e189f64 IN  QiDao: QI Token0 ETH0.00003230.1
0xcef22cb37006895992f50021b69fa47ec0e732f80b73cecaa544ae4cd023c619Approve1670003182024-01-04 12:20:0251 days 3 hrs ago0x1d6128628d63415a0aaaed455ed1ea38d880f645 IN  QiDao: QI Token0 ETH0.00002810.1
0x49514304d39f4b9ad7ff7ebbb933bdabc11fb25477df95b4d07508824a4b29f2Transfer1650734772023-12-29 21:22:5856 days 18 hrs ago0xda1d9534bef3344fa5be3b644b767b349e7415c7 IN  QiDao: QI Token0 ETH0.000037530.1
0x72303b102462e09734ca7a8296b3acf457ea853a40513268d3844492d7acdd02Approve1650730732023-12-29 21:21:1556 days 18 hrs ago0xda1d9534bef3344fa5be3b644b767b349e7415c7 IN  QiDao: QI Token0 ETH0.000042140.1
0xb0bb9fd19d2535602b3c34bedbffaaaa521cdedd9ff10e6ebb31868e90eaca55Approve1638680092023-12-26 8:24:3460 days 7 hrs ago0xda1d9534bef3344fa5be3b644b767b349e7415c7 IN  QiDao: QI Token0 ETH0.000028940.1
0x13e45fa7ae3f65d9877187d4da86455673e9f673c0ed0ca86de2e9b7bfbf26f8Approve1638679712023-12-26 8:24:2460 days 7 hrs ago0xda1d9534bef3344fa5be3b644b767b349e7415c7 IN  QiDao: QI Token0 ETH0.000028940.1
0x7595a74797516c29ac176bac95918beaf562e50d6fa0d3f765cce97de3866c3aTransfer1638427302023-12-26 6:38:3360 days 8 hrs ago0x011b0a055e02425461a1ae95b30f483c4ff05be7 IN  QiDao: QI Token0 ETH0.000041550.1
0x2d7e2e376138e0a35522fae95a5ae6caf6106976e8aab00446c97a37a3dc1777Approve1600638882023-12-14 15:03:3072 days 31 mins ago0xadc031616771ecb503c65e607c13dde152d459df IN  QiDao: QI Token0 ETH0.00007786 0.1
0x1280104db2421b15348b2e607c95392c60222e3eacaeafe31901101a748c8d51Approve1600076822023-12-14 11:02:1972 days 4 hrs ago0x8ed9433b3c5498e905d4560d8f376ba7f39a2c07 IN  QiDao: QI Token0 ETH0.000089260.1
0x746e40fce212ac987dbf2c8c326bea94837e9db8ff858a12d5aa573dbbb1cf1dApprove1577276882023-12-07 10:59:5979 days 4 hrs ago0xadc031616771ecb503c65e607c13dde152d459df IN  QiDao: QI Token0 ETH0.00008461 0.1
0xff248d87b76827cd068b74036be64763cc1829ad0b46fc76fafc3c03b6fb6bbeTransfer1575955442023-12-07 1:10:2679 days 14 hrs ago0x7ecf3629e27b410d6a277cdca9c99240706eebec IN  QiDao: QI Token0 ETH0.000118270.1
0xefa5375a3b41c7d03103928dbcea29da504e19071e83a954c7a8f501d9722849Approve1575764902023-12-06 23:33:1179 days 16 hrs ago0x5920ca4a51d93052f111e90c387f70bcf723ea3f IN  QiDao: QI Token0 ETH0.000143250.1
0x5a67537a067d34eb1e7e44ebd79ae2b2550505e6264e56252ec3db4b64a329aaApprove1571338932023-12-05 14:14:2181 days 1 hr ago0x970397d4be2f6ee28fc5165aad5262808685d1c9 IN  QiDao: QI Token0 ETH0.00020476 0.1
0xe431943a2e45c9c70654a98ceee8e21a815b65effedbfc6e6c0b5a92e32343e7Approve1570319292023-12-05 6:34:1781 days 9 hrs ago0x680c863be2807f864fc23d1aa61985ab4c576a62 IN  QiDao: QI Token0 ETH0.000081470.1
0x12660b0f92f6d86aa73dd567c91b278bb9fc2b69fe1187e29e4f25b891c8851fApprove1533798562023-11-23 20:21:1392 days 19 hrs ago0x51009e12818d1379054f47848f930fa88fb78129 IN  QiDao: QI Token0 ETH0.000054520.1
0x1932d3221a4f26b07b6972bb1e57045dfcd84828d233da005fb277bbabf4c75bApprove1533750002023-11-23 20:00:4392 days 19 hrs ago0xb1944f0ef6e1125ca33dfeb793943ca2b8367817 IN  QiDao: QI Token0 ETH0.000050690.1
0x14c1d4a52382d55c30994309448b1d4fb1e67657d601ff62c668d190e3f8d152Approve1532320062023-11-23 9:56:3793 days 5 hrs ago0xc55ce3cb45ea6e362f773f0fea7564dad0792b7a IN  QiDao: QI Token0 ETH0.000044050.1
0x55c53797a142018ac203cd791f4a9d6f24ec7a1bea2fae7ee06413f121a887e9Approve1532177602023-11-23 8:57:1893 days 6 hrs ago0x7678e875161f521b23a1561ca9c240c4eb328c51 IN  QiDao: QI Token0 ETH0.00005175 0.1
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Latest 25 internal transaction
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0x980d87e5969dd753bc8a812b841d1d2ad84c0bdfc98e2de2e0bff730f9c51f4c720544032023-03-21 8:06:21340 days 7 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0x46076afae2ecb31bba7f97fb12e7046cfb90ba0ce29329fb1a9a99c29829d3ef719632812023-03-21 1:49:42340 days 13 hrs ago 0x1d5702c6d7eb30e42a8c94b8db7ea2e8444a37fd QiDao: QI Token0 ETH
0x46076afae2ecb31bba7f97fb12e7046cfb90ba0ce29329fb1a9a99c29829d3ef719632812023-03-21 1:49:42340 days 13 hrs ago 0xc3b6bd377bdaf4b39140a7e26690d0bf849519b2 QiDao: QI Token0 ETH
0x46076afae2ecb31bba7f97fb12e7046cfb90ba0ce29329fb1a9a99c29829d3ef719632812023-03-21 1:49:42340 days 13 hrs ago 0x1d5702c6d7eb30e42a8c94b8db7ea2e8444a37fd QiDao: QI Token0 ETH
0x46076afae2ecb31bba7f97fb12e7046cfb90ba0ce29329fb1a9a99c29829d3ef719632812023-03-21 1:49:42340 days 13 hrs ago 0xc3b6bd377bdaf4b39140a7e26690d0bf849519b2 QiDao: QI Token0 ETH
0x46076afae2ecb31bba7f97fb12e7046cfb90ba0ce29329fb1a9a99c29829d3ef719632812023-03-21 1:49:42340 days 13 hrs ago 0x1d5702c6d7eb30e42a8c94b8db7ea2e8444a37fd QiDao: QI Token0 ETH
0x46076afae2ecb31bba7f97fb12e7046cfb90ba0ce29329fb1a9a99c29829d3ef719632812023-03-21 1:49:42340 days 13 hrs ago KyberSwap: Meta Aggregation Router v2 QiDao: QI Token0 ETH
0x46076afae2ecb31bba7f97fb12e7046cfb90ba0ce29329fb1a9a99c29829d3ef719632812023-03-21 1:49:42340 days 13 hrs ago KyberSwap: Meta Aggregation Router v2 QiDao: QI Token0 ETH
0xb2abcca98b799b85f0aea9bd000da9746195d864b4822fca54762848c7fcd62a719601102023-03-21 1:36:17340 days 13 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0xc3963f85429c2e3a7dbc4be87af667a4c1d528ab27c16989b4dad0dae79455a4719407522023-03-21 0:13:34340 days 15 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0xe2e8968ccba5ca1acd1339e183bf8476c98e34d866177914a7546854a19d3c24719244112023-03-20 23:04:09340 days 16 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0xc8a56bbb612085202d3498d13329fbb7ed7978f71c823164dd1cd7e21e08a04d719170882023-03-20 22:32:24340 days 17 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0xc439a8f039c55c636bd7da1bd6b2d97e1cfe36557fcb127ad9dd6c37a0a7c1e8719170632023-03-20 22:32:18340 days 17 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0x3ce83a2395e738b4b6ebfd65cde6823eef64caca5c57a94e337e1f9daed42173719038742023-03-20 21:35:12340 days 17 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0x2c5728fae33b8e0e8a6fd15f40c8e4734b9f83d390460d01f2875d8ecca9da32718273932023-03-20 16:15:45340 days 23 hrs ago 0x0cae51e1032e8461f4806e26332c030e34de3adb QiDao: QI Token0 ETH
0x8fb838c426949f7470ee81e1225e48265e8e13931446639f32b890a0e7b0ced0718262482023-03-20 16:10:57340 days 23 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0x8fb838c426949f7470ee81e1225e48265e8e13931446639f32b890a0e7b0ced0718262482023-03-20 16:10:57340 days 23 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0x8fb838c426949f7470ee81e1225e48265e8e13931446639f32b890a0e7b0ced0718262482023-03-20 16:10:57340 days 23 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0xf864aa6768964ca2f27d0035344f59691d7d22c3e8a5ec07d07c7df18baafae9718197942023-03-20 15:44:36340 days 23 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0x544cf884fb742d76bfb4e918975e96f2d9226464194fcda33d448ab16a5a7d9c717859062023-03-20 13:25:01341 days 2 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0xbe50e34c06bbd18668738d66e31feed5aee6c0ff9cd2367a1a82ec8556a5a292717835242023-03-20 13:15:19341 days 2 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0xd057ca9c7746ff6bd9a9a039fe595a899fdc7c9d22d3a9b373303dc0c0864ba0717776532023-03-20 12:51:19341 days 2 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0x69158199b240df314d4d1fb2bf99689c7409af70bf2d28696e26a983b3a04ded717766192023-03-20 12:46:58341 days 2 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0x1d2890378f1e458f7f42c8fc3fdb56bba7d0d11ad7d41d165c876d0c0bb4ed96717761702023-03-20 12:45:13341 days 2 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
0x40dc1526949ef7553a0a9928f90cb85bc7bd126f5a8d1381872f888227bdd9c1717755052023-03-20 12:42:26341 days 2 hrs ago 0x226314996cdfa694a196ef5e3d9a26b35bb40eca QiDao: QI Token0 ETH
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x3F56e0c36d275367b8C502090EDF38289b3dEa0d
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
EditableERC20

Compiler Version
v0.5.17+commit.d19bba13

Optimization Enabled:
Yes with 2000 runs

Other Settings:
default evmVersion, GNU GPLv3 license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Arbiscan.io on 2021-11-22
*/

// Sources flattened with hardhat v2.6.8 https://hardhat.org

// File @openzeppelin/contracts/GSN/[email protected]

pragma solidity ^0.5.0;

/*
 * @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.
 */
contract Context {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

    function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }

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


// File @openzeppelin/contracts/token/ERC20/[email protected]

pragma solidity ^0.5.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
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 @openzeppelin/contracts/math/[email protected]

pragma solidity ^0.5.0;

/**
 * @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.
     *
     * _Available since v2.4.0._
     */
    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.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        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.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}


// File @openzeppelin/contracts/token/ERC20/[email protected]

pragma solidity ^0.5.0;



/**
 * @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 {ERC20Mintable}.
 *
 * 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;

    mapping (address => uint256) private _balances;

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

    uint256 private _totalSupply;

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

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view 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 returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

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

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public 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 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 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 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 {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _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 {
        require(account != address(0), "ERC20: mint to the zero address");

        _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 {
        require(account != address(0), "ERC20: burn from the zero address");

        _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 is 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 {
        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 Destroys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See {_burn} and {_approve}.
     */
    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
    }
}


// File @openzeppelin/contracts/token/ERC20/[email protected]

pragma solidity ^0.5.0;

/**
 * @dev Optional functions from the ERC20 standard.
 */
contract ERC20Detailed is IERC20 {
    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
     * these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name, string memory symbol, uint8 decimals) public {
        _name = name;
        _symbol = symbol;
        _decimals = decimals;
    }

    /**
     * @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.
     *
     * 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;
    }
}


// File @openzeppelin/contracts/ownership/[email protected]

pragma solidity ^0.5.0;

/**
 * @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.
 *
 * 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(isOwner(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Returns true if the caller is the current owner.
     */
    function isOwner() public view returns (bool) {
        return _msgSender() == _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 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 onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}


// File contracts/EditableERC20.sol

pragma solidity ^0.5.17;



contract EditableERC20 is Ownable, ERC20, ERC20Detailed {
    string public _name;
    string public _symbol;

    event NameChanged(string newName, address by);
    event SymbolChanged(string newName, address by);
    event Mint(address receiver, uint256 amount, address by);

    constructor (string memory _tempName, string memory _tempSymbol, uint8 _decimals) ERC20Detailed(_name, _symbol, _decimals) public {
        _name = _tempName;
        _symbol = _tempSymbol;
    }

    function setName(string memory _newName) public onlyOwner {
        _name = _newName;
        emit NameChanged(_newName, msg.sender);
    }

    function setSymbol(string memory _newSymbol) public onlyOwner {
        _symbol = _newSymbol;
        emit SymbolChanged(_newSymbol, msg.sender);
    }

    function mint(address _receiver, uint256 _amount) public onlyOwner {
        _mint(_receiver, _amount);
        emit Mint(_receiver, _amount, msg.sender);
    }

    function name() public view returns (string memory){
      return _name;
    }

    function symbol() public view returns (string memory){
      return _symbol;
    }
}

Contract ABI

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ant":true,"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"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"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}]

Deployed Bytecode

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Metadata Hash

28a6d5ab0899e818443c56ee2f7b93bad19cfb1aa4aadb2f9808d5505ff79041
Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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