Contract 0x32307adfFE088e383AFAa721b06436aDaBA47DBE

Txn Hash Method
Block
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0xf02e8cfdee003e9eb9aaae36e3ae3f9e459b5509272f8fa9ab9508832dee1557Transfer203739062024-01-25 9:44:4033 days 2 hrs ago0xa593be9b1f2d2bbe7d220e103db7a284430ccd4d IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000517200081.500000252
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0xa03f405de3762ed8a3ee8817537ee858863c5532560fe6a185be080f4895f649Transfer202840922024-01-23 7:50:5235 days 4 hrs ago0x5ba56799020771ad96d598481417a868c83cfc46 IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000773700131.500000252
0xbd011065a4eff36c11f473e7c1450b8d1ad6342d76092d7abc2a4b326a646475Transfer202807352024-01-23 5:58:5835 days 6 hrs ago0x0414ddbf69294b1ee580eef88862dea94b726a07 IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000773880131.500000252
0x6a5c5ea2dce797cd6a5a3828aa0765ba4a65c50dea5c3fd1a3a671d820ea2623Faucet202806982024-01-23 5:57:4435 days 6 hrs ago0x0414ddbf69294b1ee580eef88862dea94b726a07 IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000502590081.500000252
0x2cfa05b7c00f15c7edbd0aa578a8270d2e2d98f2710b350d70aec1d654c8fd53Faucet202806442024-01-23 5:55:5635 days 6 hrs ago0x0414ddbf69294b1ee580eef88862dea94b726a07 IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000759090121.500000252
0xf93aa3120570b2993763aa7cce6815247ccc9604b371b132fb7b67c04d9a7cebTransfer202433712024-01-22 9:13:3036 days 3 hrs ago0x5ba56799020771ad96d598481417a868c83cfc46 IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000773700131.500000252
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0xa09e10f96bcbef0b545e2cf4b43ff93808fc3b9a30f648ba665765c75efcc388Transfer200664482024-01-18 6:56:0440 days 5 hrs ago0xa625b621c2f64afa5ef4b94653ca2a4debc57970 IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000517200081.500000252
0x9d78fb76727b7d535ae3717c17108e2f5287fcd14b7cf4a5332db34b784474c7Transfer200663492024-01-18 6:52:4640 days 5 hrs ago0x5ba56799020771ad96d598481417a868c83cfc46 IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000773880131.500000252
0x5189d338424f46bea7f9a00e623e131487ec57987c8bcfa0277e69c2221f4c1bTransfer199429742024-01-15 10:20:1643 days 2 hrs ago0x5ba56799020771ad96d598481417a868c83cfc46 IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000517200081.500000252
0xdde5e332296c32fd439151827b36deb2cd31a0f88c54761285f0cda55327a85eTransfer197632062024-01-11 6:28:0047 days 5 hrs ago0xa593be9b1f2d2bbe7d220e103db7a284430ccd4d IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000517200081.500000252
0xa9eb316dffed0ac89677f8396c9e0947a23eaf66788d8397b2d2e4d30e2fadc2Transfer197011172024-01-09 19:58:2248 days 16 hrs ago0x2825d34d84528abd8fdce7ce42ad89e1b912a2c0 IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000000515930.001000252
0x54bb7d1cebd1bd4d7440a75109ea5243427012f8633b9f95b1ce404556f48833Transfer196841802024-01-09 10:33:4849 days 1 hr ago0x5ba56799020771ad96d598481417a868c83cfc46 IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000773880131.500000252
0xa44c54f7f22b227e8eac59061fda2715ce4b4380d7d4b11543fc8a8b42271fbeTransfer196832342024-01-09 10:02:1649 days 2 hrs ago0x7e09428efcb471ba304b0723679502c01161f50e IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000773880131.500000252
0xfcc08e5c5fa6f2eb615e77c1f01ec074ec7e13e1cbffaea77c6df9ae6a80ff52Transfer196831052024-01-09 9:57:5849 days 2 hrs ago0x7e09428efcb471ba304b0723679502c01161f50e IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000517380081.500000252
0x989e4ee2088f49d2a86f5377910cf746bd74682e0031750d33429a4385deb589Transfer196830162024-01-09 9:55:0049 days 2 hrs ago0x7e09428efcb471ba304b0723679502c01161f50e IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000517200081.500000252
0x3f86a0733b5694925f88734419f432fc0f55834f153b334afcabda5abc239a47Faucet196829562024-01-09 9:53:0049 days 2 hrs ago0x7e09428efcb471ba304b0723679502c01161f50e IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000502590081.500000252
0xbedfe043ebbc80776ecc089e9058eacf450bb830cb650e2dfe4904431f26223fTransfer193284992024-01-01 4:57:4657 days 7 hrs ago0xa593be9b1f2d2bbe7d220e103db7a284430ccd4d IN  0x32307adffe088e383afaa721b06436adaba47dbe0 ETH0.0000773700131.500000252
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0xcfadf70e21db19550dc9ad979e948aeaedf6c0cb791e1851a56e3306bfbfb444125672442023-07-28 16:42:36213 days 19 hrs ago 0xa853d62e5da98117827c801bdd69c35c181dbd87 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0xcfadf70e21db19550dc9ad979e948aeaedf6c0cb791e1851a56e3306bfbfb444125672442023-07-28 16:42:36213 days 19 hrs ago 0xa853d62e5da98117827c801bdd69c35c181dbd87 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0xcfadf70e21db19550dc9ad979e948aeaedf6c0cb791e1851a56e3306bfbfb444125672442023-07-28 16:42:36213 days 19 hrs ago 0xd5caa3e04e802a82d72b5ea933b60aa0e869a8f2 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0x4520a392026a04aa57509af6f975eb449ecb860fd48d5bad931a2e5bb04b8ef8125641372023-07-28 14:59:02213 days 21 hrs ago 0xd2678cf600262057f485d12ad8f7c8fb5941eb46 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0x4520a392026a04aa57509af6f975eb449ecb860fd48d5bad931a2e5bb04b8ef8125641372023-07-28 14:59:02213 days 21 hrs ago 0xd2678cf600262057f485d12ad8f7c8fb5941eb46 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0x4520a392026a04aa57509af6f975eb449ecb860fd48d5bad931a2e5bb04b8ef8125641372023-07-28 14:59:02213 days 21 hrs ago 0x3e8b28aca1ccae3ee09ea49f9584691ec1aabb7a 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0x80e28330a0cc2fb421b06f25750a17c10e6f963e9dd77a1e2f1979c70508fbb9125634472023-07-28 14:36:02213 days 21 hrs ago 0xd5caa3e04e802a82d72b5ea933b60aa0e869a8f2 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0x80e28330a0cc2fb421b06f25750a17c10e6f963e9dd77a1e2f1979c70508fbb9125634472023-07-28 14:36:02213 days 21 hrs ago 0xa853d62e5da98117827c801bdd69c35c181dbd87 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0x80e28330a0cc2fb421b06f25750a17c10e6f963e9dd77a1e2f1979c70508fbb9125634472023-07-28 14:36:02213 days 21 hrs ago 0xd5caa3e04e802a82d72b5ea933b60aa0e869a8f2 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0xb16944d96f8e1595295c37233d6ffec4aeeb3986f1132d8a9c2e1bf37a18ad5b122578062023-07-21 12:48:00220 days 23 hrs ago 0x3e8b28aca1ccae3ee09ea49f9584691ec1aabb7a 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0x1e6f6b8877e87abd18c9deebd23338337f072e045876ece1ac98779040584912117789882023-07-10 10:47:24232 days 1 hr ago 0xd2678cf600262057f485d12ad8f7c8fb5941eb46 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
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0x94e23fa7fc369de26cb13f5d18ed103c2ce97ec2f1f11291f1a3cbec68e9025d109970482023-06-22 8:22:44250 days 4 hrs ago 0x2dded03eb5666b16636609f479a4ea2527d9fd50 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0x94e23fa7fc369de26cb13f5d18ed103c2ce97ec2f1f11291f1a3cbec68e9025d109970482023-06-22 8:22:44250 days 4 hrs ago 0x3e8b28aca1ccae3ee09ea49f9584691ec1aabb7a 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0xaafaf859586f8d438f5c0632ec6e017eae093ff97e9fe0d69e28edf1d3b6c47d108709592023-06-19 10:19:46253 days 2 hrs ago 0x3e8b28aca1ccae3ee09ea49f9584691ec1aabb7a 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0xaafaf859586f8d438f5c0632ec6e017eae093ff97e9fe0d69e28edf1d3b6c47d108709592023-06-19 10:19:46253 days 2 hrs ago 0x2dded03eb5666b16636609f479a4ea2527d9fd50 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0xaafaf859586f8d438f5c0632ec6e017eae093ff97e9fe0d69e28edf1d3b6c47d108709592023-06-19 10:19:46253 days 2 hrs ago 0x3e8b28aca1ccae3ee09ea49f9584691ec1aabb7a 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0x0248a082407729839941bd9a978fad1bfc9a95aa7bd974ddaa2f94d9054abdbc108708552023-06-19 10:16:18253 days 2 hrs ago 0x3e8b28aca1ccae3ee09ea49f9584691ec1aabb7a 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0x548290d593af5dbf73605be8e9851da7ccbdc9ff80cbcb824f5905a2fb94180d108708462023-06-19 10:16:00253 days 2 hrs ago 0x3e8b28aca1ccae3ee09ea49f9584691ec1aabb7a 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0xab83f4117440cbf682b13af3b811a51516b8c80c88fe4c7effe2dc419db7b4bb108708182023-06-19 10:15:04253 days 2 hrs ago 0x3e8b28aca1ccae3ee09ea49f9584691ec1aabb7a 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0x0245012ffef636a08311006ee56ebe8d970bc45f4ce48ac267ca8c8891027435107124772023-06-15 18:17:02256 days 18 hrs ago 0x3e8b28aca1ccae3ee09ea49f9584691ec1aabb7a 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
0xb25336a7f95492799b830e165f98e2c338003ec7607b189906b4437f06275aff106189992023-06-13 14:21:06258 days 22 hrs ago 0x3e8b28aca1ccae3ee09ea49f9584691ec1aabb7a 0x32307adffe088e383afaa721b06436adaba47dbe0 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
OptimismUselessToken

Compiler Version
v0.8.13+commit.abaa5c0e

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, None license
/**
 *Submitted for verification at goerli-optimism.etherscan.io on 2022-08-18
*/

pragma solidity 0.8.13;
// SPDX-License-Identifier: Unlicense

// An ERC-20 token for testing purposes
// Based on the OpenZeppelin ERC-20 contract, but with a faucet function





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 `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, 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 `from` to `to` 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 from,
        address to,
        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);
}



/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

/**
 * @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 Contracts guidelines: functions revert
 * instead 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, IERC20Metadata {
    mapping(address => uint256) private _balances;

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

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

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override 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 this function is
     * overridden;
     *
     * 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 override returns (uint8) {
        return 18;
    }

    /**
     * @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:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, 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}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, 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}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        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) {
        address owner = _msgSender();
        _approve(owner, spender, _allowances[owner][spender] + 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) {
        address owner = _msgSender();
        uint256 currentAllowance = _allowances[owner][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * This 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:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
        }
        _balances[to] += amount;

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, 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:
     *
     * - `account` 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 += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(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);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(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 Spend `amount` form the allowance of `owner` toward `spender`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @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 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 {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}



contract OptimismUselessToken is ERC20 {

    /**
     * @dev Calls the ERC20 constructor. 
     */
    constructor(string memory _a, string memory _b) 
        ERC20(_a, _b) {
    }

    /**
     * @dev Gives the caller 1000 tokens to play with
     */
    function faucet() external {
        _mint(msg.sender, 1000_000_000_000_000_000_000);
    }   // function faucet

}       // contract OptimismUselessToken

Contract ABI

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Deployed Bytecode

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000164f7074696d69736d5573656c657373546f6b656e2d310000000000000000000000000000000000000000000000000000000000000000000000000000000000054f55542d31000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _a (string): OptimismUselessToken-1
Arg [1] : _b (string): OUT-1

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000040
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000016
Arg [3] : 4f7074696d69736d5573656c657373546f6b656e2d3100000000000000000000
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000005
Arg [5] : 4f55542d31000000000000000000000000000000000000000000000000000000


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Swarm Source

ipfs://5c11ab933316f1577759445d905bbd6d56fa03769592f44a3cec8864cd3ed45a
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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