Contract 0xda7c0de432a9346bb6e96ac74e3b61a36d8a77eb 3

 

Contract Overview

Hop Protocol: hETH Token
Balance:
0 ETH

ETH Value:
$0.00

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x3d5106bfffcec9fdfc859e99b66c5ae98e4821e46ee070255b1f27330ad6f5c4Approve270418002022-09-27 18:05:2332 secs ago0x396eadc63ee44d252dc71d905b40e7d279f10d49 IN  Hop Protocol: hETH Token0 ETH0.00005671
0x9bc4a379b88d33f9bc3869f6dc23d425cfc01b7d917c1e4d0d275fafab9ad4dfApprove270357452022-09-27 17:14:0551 mins ago0xd7f6bad6fc716b889f84a94fee046188f08988ce IN  Hop Protocol: hETH Token0 ETH0.00006848
0x3f064663b46c073b059cb0c013a9410b405f4a4b3141d15b7708ae715c440b68Approve270325542022-09-27 16:54:101 hr 11 mins ago0x1c6c967632ec238a8471d8b1fa314baa6e419a28 IN  Hop Protocol: hETH Token0 ETH0.00006597
0x7ac7b4de384235325c190aff80e6c827b7ed5a9c7a8445b37df74d68fefd9d51Approve270257262022-09-27 16:18:131 hr 47 mins ago0x725a2f388c33da6b7d4f71ceccc6e8f559c8d8a2 IN  Hop Protocol: hETH Token0 ETH0.00003771
0xa7bd572933408db520f4b4065183fbd5d8ba3941a2b860df53839050a2740045Approve270192512022-09-27 15:44:592 hrs 20 mins ago0x5c8680dce97932edf4a14184ce8188ecbfba591f IN  Hop Protocol: hETH Token0 ETH0.00003868
0xa87b3f22a650424b18319898ae4909ba583541851bba854fb181a26e54ee2db7Approve270160052022-09-27 15:24:132 hrs 41 mins ago0xc2c738e4071d4e54e90b598f3698bb5e56a7c423 IN  Hop Protocol: hETH Token0 ETH0.00003865
0x243758bb27e2e962f679ef35a05430ad79ba5867290d47a85a9f1a0bd306eedbApprove270129432022-09-27 15:05:143 hrs ago0x20628b67ce5cddac1cb95198c0ff5271f39fc048 IN  Hop Protocol: hETH Token0 ETH0.0000343
0x1098dda9018e02c5496ae3acb32cabee3028377d2d810fe67c3ca70435711f42Approve270118342022-09-27 14:57:543 hrs 8 mins ago0x3c973082c3118ec842820fa263b71b6e3b461ff9 IN  Hop Protocol: hETH Token0 ETH0.00003421
0x6d4e13344a97289478efa8d39d2f84d4a9a30eefbc10a9b72f751f7e111d4feaApprove270079742022-09-27 14:34:393 hrs 31 mins ago0x47fcc63a468f02ea8ce1515ab261a228ec41ae28 IN  Hop Protocol: hETH Token0 ETH0.00003328
0x09c88bea2888282d170cf8a90bf3da0f66d170ede6217376befa9761ae9aa28eApprove270068582022-09-27 14:27:523 hrs 38 mins ago0xe09c62b8739685797468277c5e858dd262d48471 IN  Hop Protocol: hETH Token0 ETH0.00003607
0x467a32d71ae870d5ab6ab3686407fb191bd0eb39c8c691fac5b3a01846529165Approve270050902022-09-27 14:17:113 hrs 48 mins ago0xcc459846ff7587a972caeff28315c8d20390c4bd IN  Hop Protocol: hETH Token0 ETH0.00003512
0xa047d1db290885c42e51836066b512e9c46c6515d5de3210019abff4a7358173Approve270034362022-09-27 14:06:543 hrs 59 mins ago0x88fa395aa8a7b57cff6572fd37b585e1e8ce3dac IN  Hop Protocol: hETH Token0 ETH0.00003757
0xf66563dfa66a7b950052475b728533c6c16334a7412044d0c7f287dfc218e836Approve270034302022-09-27 14:06:513 hrs 59 mins ago0xaf870161cee20b9b04ae4aeee5b623dc56d26e17 IN  Hop Protocol: hETH Token0 ETH0.00003699
0xb49a9ef99e0943f2f51923b581370ec7b553f9f893351e8fa6a02488c970ec70Approve269997962022-09-27 13:46:574 hrs 18 mins ago0x192990965b6720403d316090495d1e1ff93bbe5b IN  Hop Protocol: hETH Token0 ETH0.00003782
0xe9d0ef8ca7afbf301f4c04db407fa80de742166151f8559df82a21471a3bca43Approve269973532022-09-27 13:33:324 hrs 32 mins ago0x6bda0404288459cdc35b95a0162636088dccbee8 IN  Hop Protocol: hETH Token0 ETH0.00003794
0xe7ed5ed04ec50306cf3d924c02a7d4708c60ef35bdec8eed52f16ce78c06072bApprove269911612022-09-27 12:55:415 hrs 10 mins ago0x795d62666dd250044c96f760c0167f5a5a505edb IN  Hop Protocol: hETH Token0 ETH0.00002414
0x95dfbf4daaf760260bc606016383ab93c0043328138ea1ac9ae5c7d570653c2aApprove269851682022-09-27 12:25:175 hrs 40 mins ago0x66d6afdacd81ff68dbb5760fe38a9e69c34e0bad IN  Hop Protocol: hETH Token0 ETH0.00001825
0x3ac6b225080ec6a78877afc1835c77518ccd5f3b2468c717b764c778234b79beApprove269839302022-09-27 12:19:025 hrs 46 mins ago0xaeb16a2429d4c714d7eac724802d2fad6779f8e1 IN  Hop Protocol: hETH Token0 ETH0.00001617
0x02289191510000cac09540a9d06fb7474ad254bbd505826417d746dcd169de8aApprove269809012022-09-27 12:04:236 hrs 1 min ago0xfe8bb4c757cdad48c6936a7d3ea9d929ac88f62b IN  Hop Protocol: hETH Token0 ETH0.00001706
0x637845602111091a40ca588a8fff7925605b037b175a0065086813fe7d691b26Approve269778292022-09-27 11:44:546 hrs 21 mins ago0x2e26013c4a52c6a80f58c36a5e1301faa849a2dd IN  Hop Protocol: hETH Token0 ETH0.00001637
0x18ce6035b46e5bbe8559d808190c4fec0d26dfe70a659d1e316495fa925c23c7Approve269775422022-09-27 11:43:156 hrs 22 mins ago0xbe4aa0296b2b217d03ddfff792675cfca96a95b4 IN  Hop Protocol: hETH Token0 ETH0.00001643
0x9e64b7b4be42bdc30b398a0beb4c7577e8dd4dac988e17beaa8d77acb6c6c81eApprove269737992022-09-27 11:16:526 hrs 49 mins ago0x49a5ec7df5270ad8f9f1f19bccbfdd40e90d6a74 IN  Hop Protocol: hETH Token0 ETH0.00001699
0x7ac621392ec8e490c4b766e90dea0674d82198368bb862882b6b26ab92a0075bApprove269734322022-09-27 11:14:426 hrs 51 mins ago0x14d607c20ff934b0d895577c6e80ab0cd6a8b322 IN  Hop Protocol: hETH Token0 ETH0.00001774
0x02ea9883c693cd6f853e36b1b7b23c3e3578f71565edc0fad39941c9a9d935ecApprove269644542022-09-27 10:06:477 hrs 59 mins ago0x3a1495e36149143229a64f13f8b075d304b40f9f IN  Hop Protocol: hETH Token0 ETH0.00002258
0x30e5d35c96987ff6c8df7077a607ddd0569852638cd65ee638cb26e3570404d4Approve269625082022-09-27 9:50:428 hrs 15 mins ago0x6e6360af8403fa5f47c4dc10a39c2391bd0b1bb0 IN  Hop Protocol: hETH Token0 ETH0.00002562
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OVERVIEW

Hop Protocol

Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xec56d02b12b55d67c9a760349bc68d52ce4a40029820d28dca2727d6af78d947270417752022-09-27 18:05:1144 secs ago 0x3749c4f034022c39ecaffaba182555d4508caccc Hop Protocol: hETH Token0 ETH
0xec56d02b12b55d67c9a760349bc68d52ce4a40029820d28dca2727d6af78d947270417752022-09-27 18:05:1144 secs ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0xfe40431942adf576713f0ce0962ac207ff976e73cb0e3cc9afd05b48b49015b2270417252022-09-27 18:04:461 min ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0x7374dbd1af96166e2664a4050c09357dc66d2c3bcfbd0a6695888683afcaea23270415652022-09-27 18:03:162 mins ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0x7374dbd1af96166e2664a4050c09357dc66d2c3bcfbd0a6695888683afcaea23270415652022-09-27 18:03:162 mins ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0x7374dbd1af96166e2664a4050c09357dc66d2c3bcfbd0a6695888683afcaea23270415652022-09-27 18:03:162 mins ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0x7374dbd1af96166e2664a4050c09357dc66d2c3bcfbd0a6695888683afcaea23270415652022-09-27 18:03:162 mins ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0x7374dbd1af96166e2664a4050c09357dc66d2c3bcfbd0a6695888683afcaea23270415652022-09-27 18:03:162 mins ago 0x33ceb27b39d2bb7d2e61f7564d3df29344020417 Hop Protocol: hETH Token0 ETH
0x7374dbd1af96166e2664a4050c09357dc66d2c3bcfbd0a6695888683afcaea23270415652022-09-27 18:03:162 mins ago 0x33ceb27b39d2bb7d2e61f7564d3df29344020417 Hop Protocol: hETH Token0 ETH
0x7374dbd1af96166e2664a4050c09357dc66d2c3bcfbd0a6695888683afcaea23270415652022-09-27 18:03:162 mins ago 0x3749c4f034022c39ecaffaba182555d4508caccc Hop Protocol: hETH Token0 ETH
0x7374dbd1af96166e2664a4050c09357dc66d2c3bcfbd0a6695888683afcaea23270415652022-09-27 18:03:162 mins ago 0x3749c4f034022c39ecaffaba182555d4508caccc Hop Protocol: hETH Token0 ETH
0x7374dbd1af96166e2664a4050c09357dc66d2c3bcfbd0a6695888683afcaea23270415652022-09-27 18:03:162 mins ago 0x3749c4f034022c39ecaffaba182555d4508caccc Hop Protocol: hETH Token0 ETH
0xde0e52eb44e9b2ef677e56ecef719e9dda5a1a20da5902d9ce6b3fc52642a8e8270411712022-09-27 17:59:496 mins ago 0x3749c4f034022c39ecaffaba182555d4508caccc Hop Protocol: hETH Token0 ETH
0xde0e52eb44e9b2ef677e56ecef719e9dda5a1a20da5902d9ce6b3fc52642a8e8270411712022-09-27 17:59:496 mins ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0x9284848209250bb5d0563ec805a59ec802bcd267c4331cdc4f96e2eda07ae60b270411082022-09-27 17:59:176 mins ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0x9284848209250bb5d0563ec805a59ec802bcd267c4331cdc4f96e2eda07ae60b270411082022-09-27 17:59:176 mins ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0x9284848209250bb5d0563ec805a59ec802bcd267c4331cdc4f96e2eda07ae60b270411082022-09-27 17:59:176 mins ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0x9284848209250bb5d0563ec805a59ec802bcd267c4331cdc4f96e2eda07ae60b270411082022-09-27 17:59:176 mins ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0x9284848209250bb5d0563ec805a59ec802bcd267c4331cdc4f96e2eda07ae60b270411082022-09-27 17:59:176 mins ago 0x33ceb27b39d2bb7d2e61f7564d3df29344020417 Hop Protocol: hETH Token0 ETH
0x9284848209250bb5d0563ec805a59ec802bcd267c4331cdc4f96e2eda07ae60b270411082022-09-27 17:59:176 mins ago 0x33ceb27b39d2bb7d2e61f7564d3df29344020417 Hop Protocol: hETH Token0 ETH
0x9284848209250bb5d0563ec805a59ec802bcd267c4331cdc4f96e2eda07ae60b270411082022-09-27 17:59:176 mins ago 0x3749c4f034022c39ecaffaba182555d4508caccc Hop Protocol: hETH Token0 ETH
0x9284848209250bb5d0563ec805a59ec802bcd267c4331cdc4f96e2eda07ae60b270411082022-09-27 17:59:176 mins ago 0x3749c4f034022c39ecaffaba182555d4508caccc Hop Protocol: hETH Token0 ETH
0x4c0bc3956ac57a49a8253f7b4c7d1b26768e42b3d6bbf0b33a64c9794f63cfcf270409372022-09-27 17:57:428 mins ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0x4c0bc3956ac57a49a8253f7b4c7d1b26768e42b3d6bbf0b33a64c9794f63cfcf270409372022-09-27 17:57:428 mins ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
0x4c0bc3956ac57a49a8253f7b4c7d1b26768e42b3d6bbf0b33a64c9794f63cfcf270409372022-09-27 17:57:428 mins ago 0x652d27c0f72771ce5c76fd400edd61b406ac6d97 Hop Protocol: hETH Token0 ETH
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x0ce6c85cF43553DE10FC56cecA0aef6Ff0DD444d

Contract Name:
HopBridgeToken

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 50000 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 6 : HopBridgeToken.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

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

/**
 * @dev Hop Bridge Tokens or "hTokens" are layer-2 tokens that represent a deposit in the L1_Bridge
 * contract. Each Hop Bridge Token is a regular ERC20 that can be minted and burned by the L2_Bridge
 * that owns it.
 */

contract HopBridgeToken is ERC20, Ownable {

    constructor (
        string memory name,
        string memory symbol,
        uint8 decimals
    )
        public
        ERC20(name, symbol)
    {
        _setupDecimals(decimals);
    }

    /**
     * @dev Mint new hToken for the account
     * @param account The account being minted for
     * @param amount The amount being minted
     */
    function mint(address account, uint256 amount) external onlyOwner {
        _mint(account, amount);
    }

    /**
     * @dev Burn hToken from the account
     * @param account The account being burned from
     * @param amount The amount being burned
     */
    function burn(address account, uint256 amount) external onlyOwner {
        _burn(account, amount);
    }
}

File 2 of 6 : ERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.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 virtual returns (string memory) {
        return _name;
    }

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

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

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

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

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

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

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _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 virtual {
        _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 3 of 6 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../utils/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.
 */
abstract 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 virtual returns (address) {
        return _owner;
    }

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

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

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

File 4 of 6 : 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 5 of 6 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

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

pragma solidity >=0.6.0 <0.8.0;

/**
 * @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, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

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

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

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

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

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

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        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, reverting 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) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

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

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * 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);
        return a / b;
    }

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

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 50000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract ABI

[{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"symbol","type":"string"},{"internalType":"uint8","name":"decimals","type":"uint8"}],"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":"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":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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