Contract 0x4dbf253521e8e8080282c964975f3afb7f87cece

Contract Overview

Balance:
0 BNB
Txn Hash
Block
From
To
Value [Txn Fee]
0x26132d77a07610bd5c8e5e15d886fdad4d003187b6a6289caef5069dd24e6bd081539142021-04-20 20:51:5527 secs ago0x8071d5b2d41edad16cbc2e76323781b607f19925 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
0x4f54dd5536f2bfcb49c1ab64d0dac63641fa01daa06515e898178c2ec4584f8c81539122021-04-20 20:51:4933 secs ago0x666a479f910d0ca5418b00316b93cf5af6b6baa1 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00072354
0x610084498f1dccfd0168cd137df5a718c25cf26f14fad01bd4526c1b7697542f81538912021-04-20 20:50:461 min ago0xd0d351f8ecbb85e3d1c6f16d0a7042bd7e9d8f55 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
0xbf955baa0c76caa0c91a0de45510570e71b505251f892a5e5e06bb1f89847d4581538862021-04-20 20:50:311 min ago0x666a479f910d0ca5418b00316b93cf5af6b6baa1 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00072378
0xc626edee870832354418383f23cbaf2da38c1f46a94179f96a41fd6ed6fade4881538762021-04-20 20:50:012 mins ago0xbf3f914f7e45dca30ec7f21405fdcbf5f13e187d IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
0x47820c6c2d062d162dad5da7eff72ca02ec0f5c75464cd92b5d30f73c682f03781538742021-04-20 20:49:552 mins ago0x666a479f910d0ca5418b00316b93cf5af6b6baa1 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00072402
0x1af9f32dc203e16c40d2982f6570ddafde1bae8dd0a780d99de8dbe703bc9dbd81538632021-04-20 20:49:223 mins ago0xdcb9cd2a1c5880be835e344c14a7f9b27fc624aa IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
0xfdbe54b6627792d382e8adedb09d6d18f7dbfa0be99526895a38860294a4ac5681538582021-04-20 20:49:073 mins ago0x666a479f910d0ca5418b00316b93cf5af6b6baa1 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00072378
0x23c8e63476e8098f0984b9c4c99c3f69d5085d5b8536c26692751340771fc62e81538482021-04-20 20:48:373 mins ago0x223687a72b771ab0bade6849535f915e085211d9 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
0x3b1e1cc2650efedff050974b9a17abd91671d7589cd9c6292a66ff7f1ceb35b481538462021-04-20 20:48:313 mins ago0x666a479f910d0ca5418b00316b93cf5af6b6baa1 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00072378
0xced94a917a0aee52f882d35e5b54dbff31f17f9e469a375b99f49f103317fbee81538302021-04-20 20:47:434 mins ago0x26956b8b41d720da932876615505c5c7a148810a IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
0x0bd9d582c19f34b645dbec4fbe57984bccb73c90432560d9644a6dfa52dd44d381538282021-04-20 20:47:374 mins ago0x666a479f910d0ca5418b00316b93cf5af6b6baa1 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00072378
0xc9d7bef569c6e29e8340df392f01cd768dc3e0cae86f5aee53a6805bb3bc7cf181538172021-04-20 20:47:045 mins ago0x3162c5440f242e4a42aef73fc99d425aa35cc060 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
0xa9aa6b0a54dfc07c058655b7986b2a5eb4ea485fd8498a7b9f42d214ae3653e481538152021-04-20 20:46:585 mins ago0x666a479f910d0ca5418b00316b93cf5af6b6baa1 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00072378
0x83dbf8c87e8f0fc8b81cc12454dffa5f7dab1f8240ae20c2c05fca468ac624a981538042021-04-20 20:46:255 mins ago0xe46b2de95b7d8abbf90a37b63f145a1ca0d243f7 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
0x482446bd7ffcda07cfa513f2339257f2b0a7eff76ed9619a2143dbe2bb7cc91381538022021-04-20 20:46:196 mins ago0x666a479f910d0ca5418b00316b93cf5af6b6baa1 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00072402
0x9a457d488fec597317fc7e507665f39edd14ab3795cb0a4705e0202d46fa677181537912021-04-20 20:45:466 mins ago0x14c979830d8a01aecdf823e7ca2d85277aa8a6c4 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
0x2b609b823b999e60a9d6da0b4a558f88684ac426e7e657bbf3385ec8d7041e8b81537892021-04-20 20:45:406 mins ago0x666a479f910d0ca5418b00316b93cf5af6b6baa1 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00072402
0x4e3d76730e1b9a913fd13d9e0f6f5fbba1f9c314ef3d14d32ccd4cb85939e86481537782021-04-20 20:45:077 mins ago0x01c627f3bfccd5e8684a26b9c9d04739effdc3d2 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
0xb9bfc39a429181c55f7392c81d4be67d6f51ef983e1555f81d7e987bd329461081537762021-04-20 20:45:017 mins ago0x666a479f910d0ca5418b00316b93cf5af6b6baa1 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00072378
0x5a0edb6c41e47218608286a07de5f67f84914f30c2511daa54651d3d302be47e81537652021-04-20 20:44:287 mins ago0x194051dec4e3c5ceb86a7ae6881452a485352e61 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
0x287fd83cf146606f1d29e6c2eba59be2d328aad820f49b652891f67e5083d5f781537632021-04-20 20:44:228 mins ago0x666a479f910d0ca5418b00316b93cf5af6b6baa1 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00072378
0xfa70390cb7ee57b7db6d6e13de760ac4402176e646752815a5214871a2a21a3481537522021-04-20 20:43:498 mins ago0xbff0157f0de542118554964643c3d79a3367c41c IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
0xfcb90bcfc99fdaa6a118f317fa729d6a230a07214dd733df3ae0974642d95fbf81537472021-04-20 20:43:348 mins ago0x666a479f910d0ca5418b00316b93cf5af6b6baa1 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00072378
0x1171aac59c5af08b25d5ed13614c27f1acfcd2c68a9290a33761f6a289c75d4c81537372021-04-20 20:43:049 mins ago0x5cd87d6c0803abb556b26c0ade555f766a520833 IN  0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB0.00058406
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0x5736a8e897e6eae440eaaf089e0ff80512f70bca57d6feca7db1fb1bbfc4162f81539172021-04-20 20:52:0418 secs ago 0x7ec560275d8c1e854f4954fb06d2e15b2476db44 0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB
0x5736a8e897e6eae440eaaf089e0ff80512f70bca57d6feca7db1fb1bbfc4162f81539172021-04-20 20:52:0418 secs ago 0x7ec560275d8c1e854f4954fb06d2e15b2476db44 0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB
0x5736a8e897e6eae440eaaf089e0ff80512f70bca57d6feca7db1fb1bbfc4162f81539172021-04-20 20:52:0418 secs ago 0x7ec560275d8c1e854f4954fb06d2e15b2476db44 0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB
0xd8b61b045a7715e712b257c27fa66f043bcd95eba7478467e5777aa78ac0c64581538942021-04-20 20:50:551 min ago 0x7ec560275d8c1e854f4954fb06d2e15b2476db44 0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB
0xd8b61b045a7715e712b257c27fa66f043bcd95eba7478467e5777aa78ac0c64581538942021-04-20 20:50:551 min ago 0x7ec560275d8c1e854f4954fb06d2e15b2476db44 0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB
0xd8b61b045a7715e712b257c27fa66f043bcd95eba7478467e5777aa78ac0c64581538942021-04-20 20:50:551 min ago 0x7ec560275d8c1e854f4954fb06d2e15b2476db44 0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB
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0x4f2cbd235d60c728c78ce670c078fef81951a67d3b65c37d00f7c6a490d51a9a81538202021-04-20 20:47:135 mins ago 0x7ec560275d8c1e854f4954fb06d2e15b2476db44 0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB
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0xf6efda24903867b2c4e00140c626d2520810d8ed9fd474f89709eb91ebf985d281538072021-04-20 20:46:345 mins ago 0x7ec560275d8c1e854f4954fb06d2e15b2476db44 0x4dbf253521e8e8080282c964975f3afb7f87cece0 BNB
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Contract Source Code Verified (Similar Match)
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x6Fcbfaf1eD00a24bB755026B826F65C9c88a7AA7

Contract Name:
ERC20Token

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at BscScan.com on 2021-02-23
*/

// File: @openzeppelin/contracts/GSN/Context.sol

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with 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: @openzeppelin/contracts/token/ERC20/IERC20.sol



/**
 * @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: @openzeppelin/contracts/math/SafeMath.sol



/**
 * @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: @openzeppelin/contracts/token/ERC20/ERC20.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;

    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: contracts/test/ERC20.sol



// providing optional methods (name, symbol and decimals)
contract ERC20Token is ERC20 {
    constructor(
        string memory _name,
        string memory _symbol,
        uint256 _initialSupply
    ) public ERC20(_name, _symbol) {
        _mint(msg.sender, _initialSupply);
    }

    function setupDecimals(uint8 decimals_) external {
        _setupDecimals(decimals_);
    }
}

Contract ABI

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Deployed ByteCode Sourcemap

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Swarm Source

ipfs://619a42aae5e03d65464e251a227ae42148b571a1e37c7cbec37df99f005104c1
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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