Contract 0x9A06Db14D639796B25A6ceC6A1bf614fd98815EC 1

 

Contract Overview

Panther Protocol: $ZKP Token
Balance:
0 MATIC

MATIC Value:
$0.00

Token:
 
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x1c5951a2b8ac0524f3959a22a74e8d3f567ecbf967dea9f2becfee8650e97260Approve320187792022-08-18 3:21:4441 mins ago0xaabf9b94bcc4caabb358cd11c3b396c50ad81f74 IN  Panther Protocol: $ZKP Token0 MATIC0.00146373694 31.350788
0x907f95d261f32b8ba9e179a23dbdc3090d8682b5de92bab5f2bc323f0e42a0ccTransfer320153682022-08-18 1:15:092 hrs 47 mins ago0x272e1e167aa77f23a928c1384c2f938897518184 IN  Panther Protocol: $ZKP Token0 MATIC0.001051175844 30.418608238
0xe14aa06653746e954a525f015420c6b7a86ffdd957c8d2b6ab26bd7f687f56b3Approve320130082022-08-17 23:47:364 hrs 15 mins ago0xbf861d09615543c419c749ea8cbeb720e3b3e3ad IN  Panther Protocol: $ZKP Token0 MATIC0.000737043926 30.200529654
0x08653f811db8c598fbe22800ee78dfdf5a64b691433be94f25787a9d53cb0e51Approve320130062022-08-17 23:47:284 hrs 15 mins ago0xbf861d09615543c419c749ea8cbeb720e3b3e3ad IN  Panther Protocol: $ZKP Token0 MATIC0.000759839098 31.134566646
0x29fd73c218c09bc3d653422bece4ad775cfb9204e6c1fbed71a030e621e4104fApprove320130052022-08-17 23:47:244 hrs 15 mins ago0xbf861d09615543c419c749ea8cbeb720e3b3e3ad IN  Panther Protocol: $ZKP Token0 MATIC0.000759839098 31.134566641
0xf6f64852fd072969315457dcc6666b7d8e41fe25bd9e2a9c1c18b3bca796a388Transfer320026952022-08-17 17:35:0710 hrs 27 mins ago0x256215f92bb4eb529581f9c4260022a5e8558094 IN  Panther Protocol: $ZKP Token0 MATIC0.00154899 30.000000013
0x9ee3d2263de6dddc90702c3326ef1c37c558132dba133b71f2a3365b9d1c79a4Transfer319990282022-08-17 15:13:4212 hrs 49 mins ago0xc73e9ddad2ae4cbed04c3547a4103ace4b9cdd13 IN  Panther Protocol: $ZKP Token0 MATIC0.0234225500
0x2689dda5fd22c597095fdcb7881297efb699f4ac09c1a4bf28d8857f742857afTransfer319961502022-08-17 13:08:0514 hrs 54 mins ago0xa72acc86fd54abfdc08e767b5829db298d548b62 IN  Panther Protocol: $ZKP Token0 MATIC0.002376471284 68.793495004
0x32cac8bd0531229967254aa54315e38fccf508f821dbdecea74bcf0f039da2a8Withdraw319957462022-08-17 12:45:4115 hrs 17 mins ago0x65c9e4f6383a1f50bf7b1367849d6bfe827ad830 IN  Panther Protocol: $ZKP Token0 MATIC0.001519399571 52.216632461
0x99d1da3639526f0ea57c8ff1ae8b7c87adf4cca820b0b3471f3fb4db5409bb23Transfer319957032022-08-17 12:44:1115 hrs 18 mins ago0x7c61f187870ddccc7e255f01561618fcdc076748 IN  Panther Protocol: $ZKP Token0 MATIC0.005038894776 169.198306855
0x53bf1047ca7876b945577992fe5ab1229b5ef389d2870eae4f87d5ab2bbc82e5Transfer319948072022-08-17 12:11:1515 hrs 51 mins ago0xff6be9a8b505adaa4a0899a577c5d52e2a6d9a30 IN  Panther Protocol: $ZKP Token0 MATIC0.001864448436 39.779991813
0xbb3532202c512ab20491c46ae7fe32bac4f9a7582fcc7175774c80a4125446e2Withdraw319941242022-08-17 11:39:2016 hrs 23 mins ago0x4c897357c2bbc36a0fcc22128235d09856e5b920 IN  Panther Protocol: $ZKP Token0 MATIC0.001766586371 52.170172204
0xebd31e9ad163e9dbf8bffeda2d3adc6853c6fa3a651d1f69b0694a76d698b946Withdraw319931182022-08-17 10:54:5217 hrs 7 mins ago0x3ed2dc72a73ebb3c5a9587fdbff05ac498238570 IN  Panther Protocol: $ZKP Token0 MATIC0.000893653492 30.711852796
0xc1ef42da7e04c91f6834bf7898722c7de16ed8d10e2a62e514556f06fdbdef12Approve319863122022-08-17 6:37:2321 hrs 25 mins ago0xb339dcde6cd3be7a003b462e5b5787e0c39cc8de IN  Panther Protocol: $ZKP Token0 MATIC0.0018302088 39.200000002
0x89be813c20a6311c11f31ad3b55f85f3f1231f9277834a282689fdeb36cd1a8dTransfer319858422022-08-17 6:20:5721 hrs 41 mins ago0x7c61f187870ddccc7e255f01561618fcdc076748 IN  Panther Protocol: $ZKP Token0 MATIC0.00774855 150.000000016
0xdbc6b853f78c78aaed11c3e75302d54b28af577a48389300c6cdfefa28e9d8d0Approve319809722022-08-17 3:26:061 day 36 mins ago0xe0a01004a9bde6009ae302d3e589c044815c2e9e IN  Panther Protocol: $ZKP Token0 MATIC0.001464624592 31.369800013
0x4379554fbd0897ab41c94c7ac1ee9173759a61167654b3390b7c5c24a880ab0eApprove319803772022-08-17 3:03:321 day 59 mins ago0xa5932143436cc457671cd129e3152235cc520b7c IN  Panther Protocol: $ZKP Token0 MATIC0.001593401297 34.127980836
0xf0de72341b27833cb6088d72458d8851b83fed6e3dfacb88c31c55a0b70400faTransfer319739252022-08-16 22:59:421 day 5 hrs ago0x79bc824909a4b6de91c91a764fc6a5bac8266f16 IN  Panther Protocol: $ZKP Token0 MATIC0.001825162587 35.332338076
0x68a889c9d7c2702207011fd79a0501c637eaf734723a064c5b9cdc64a77d1d19Transfer319678682022-08-16 19:15:561 day 8 hrs ago0xb921e7f441b13705231b1256987075b0cca58c01 IN  Panther Protocol: $ZKP Token0 MATIC0.001074112701 31.093145223
0xac1e3f90bd80105e8a4a0ea94a2bfed806f6196db4b1e25f65ac8a054b238d70Approve319668242022-08-16 18:35:481 day 9 hrs ago0xc4a740d2fec7a9dd7dfad4dba1e5d025bb8defdd IN  Panther Protocol: $ZKP Token0 MATIC0.001430250778 30.633570612
0x42e681563cf36844617c6691ee1aecbf0a1b289ae542a8d74ae89c8de2a2b9c4Approve319658752022-08-16 18:03:101 day 9 hrs ago0xac9ff68ff1f377cd62b63bcc500025f81efbcab0 IN  Panther Protocol: $ZKP Token0 MATIC0.001400670001 30.000000028
0xe4766cf3a306255745fa41f75f35aa6510c904a6f75aae02ef7be287dce547cfTransfer319639402022-08-16 16:52:201 day 11 hrs ago0xe916c7704acbf862d3ea09ecbc2a14f4d66fe9b1 IN  Panther Protocol: $ZKP Token0 MATIC0.000985492544 33.13136812
0xafa5aa5b8fc625c510be37292c5e6c567cd8025ed5f74085cb66c7cc9d9c0847Transfer319638672022-08-16 16:49:501 day 11 hrs ago0xfe4e7acee2d64dbeec22b5cba1a40f85fad46823 IN  Panther Protocol: $ZKP Token0 MATIC0.00188309015 36.46219674
0x5b825737f41f257f027ad5fdf9afe53070cee2714bb1f1ff348735e524ad79d1Transfer319638462022-08-16 16:49:081 day 11 hrs ago0xfe4e7acee2d64dbeec22b5cba1a40f85fad46823 IN  Panther Protocol: $ZKP Token0 MATIC0.001990444301 38.549847995
0x673c279670d1b1b40a2ec75a965ab08198a48131707bc8221f0e59d4baadd6afTransfer319638242022-08-16 16:48:201 day 11 hrs ago0xfe4e7acee2d64dbeec22b5cba1a40f85fad46823 IN  Panther Protocol: $ZKP Token0 MATIC0.00154565047 44.743102335
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OVERVIEW

Panther is a decentralized protocol that enables end-to-end privacy for Defi using zero-knowledge proofs. Users can mint fully-collateralized, composable tokens called zAssets, which can be used to execute private, trusted Defi transactions across multiple blockchains.

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Contract Source Code Verified (Exact Match)

Contract Name:
PZkpToken

Compiler Version
v0.8.4+commit.c7e474f2

Optimization Enabled:
Yes with 800 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 13 : PZkpToken.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/extensions/draft-ERC20Permit.sol";
import "./interfaces/IChildToken.sol";
import "./utils/Claimable.sol";
import "./utils/ImmutableOwnable.sol";

/**
 * @title PZkpToken
 * @notice $ZKP token on Polygon
 * @dev This contract is supposed to run on Polygon and be "mapped" to
 * the ZKPToken contract on the mainnet via the Polygon PoS bridge
 */
contract PZkpToken is ERC20Permit, ImmutableOwnable, Claimable, IChildToken {
    string private constant _name = "$ZKP Token";
    string private constant _symbol = "$ZKP";

    // solhint-disable-next-line var-name-mixedcase
    bytes32 private constant META_TRANSACTION_TYPEHASH =
        keccak256(
            "MetaTransaction(uint256 nonce,address from,bytes functionSignature)"
        );

    event MetaTransactionExecuted(
        address userAddress,
        address relayerAddress,
        bytes functionSignature
    );

    /// @notice Account authorized to mint tokens against deposits on the mainnet
    /// @dev Supposed to be the `ChildChainManager` contract (by the Polygon team)
    address public minter;

    modifier onlyMinter() {
        require(msg.sender == minter, "ZKP: unauthorized");
        _;
    }

    constructor(address owner)
        ERC20(_name, _symbol)
        ERC20Permit(_name)
        ImmutableOwnable(owner)
    {
        // Owner is supposed to transfer the minter role to the ChildChainManager
        // by a separate `setMinter` call (thus "enabling" bridging/deposits)
        _setMinter(owner);
    }

    /**
     * @notice Called when token is deposited on the mainnet
     * @dev It handles deposit by minting the required amount for a user
     * SHOULD be callable only by the ChildChainManager
     * @param user User address for whom deposit is being done
     * @param depositData Abi encoded amount
     */
    function deposit(address user, bytes calldata depositData)
        external
        override
        onlyMinter
    {
        uint256 amount = abi.decode(depositData, (uint256));
        _mint(user, amount);
    }

    /**
     * @notice Called when user wants to withdraw tokens back to the mainnet
     * @dev It burns user's tokens which will be verified when exiting on the mainnet
     * @param amount Amount of tokens to withdraw
     */
    function withdraw(uint256 amount) external {
        _burn(_msgSender(), amount);
    }

    // batch functions
    function batchTransfer(
        address[] calldata _recipients,
        uint256[] calldata _values
    ) external returns (bool) {
        _throwLengthMismatch(_recipients.length, _values.length);

        for (uint256 i = 0; i < _recipients.length; i++) {
            require(
                transfer(_recipients[i], _values[i]),
                "ZKP: unable to transfer"
            );
        }

        return true;
    }

    function batchTransferFrom(
        address _from,
        address[] calldata _recipients,
        uint256[] calldata _values
    ) external returns (bool) {
        _throwLengthMismatch(_recipients.length, _values.length);

        for (uint256 i = 0; i < _recipients.length; i++) {
            require(
                transferFrom(_from, _recipients[i], _values[i]),
                "ZKP: unable to transfer"
            );
        }

        return true;
    }

    function batchIncreaseAllowance(
        address[] calldata _spenders,
        uint256[] calldata _addedValues
    ) external returns (bool) {
        _throwLengthMismatch(_spenders.length, _addedValues.length);

        for (uint256 i = 0; i < _addedValues.length; i++) {
            require(
                increaseAllowance(_spenders[i], _addedValues[i]),
                "ZKP: unable to increase"
            );
        }

        return true;
    }

    function batchDecreaseAllowance(
        address[] calldata _spenders,
        uint256[] calldata _subtractedValues
    ) external returns (bool) {
        _throwLengthMismatch(_spenders.length, _subtractedValues.length);

        for (uint256 i = 0; i < _subtractedValues.length; i++) {
            require(
                decreaseAllowance(_spenders[i], _subtractedValues[i]),
                "ZKP: unable to decrease"
            );
        }

        return true;
    }

    /// @notice It executes "Native meta transactions"
    /// @dev Any function on this contract may be called via a relayer on behalf
    /// of a user, providing a valid ECDSA signature of the user and properly
    /// formed call data submitted
    function executeMetaTransaction(
        address userAddress,
        bytes memory functionSignature,
        bytes32 r,
        bytes32 s,
        uint8 v
    ) public payable returns (bytes memory) {
        bytes32 structHash = keccak256(
            abi.encode(
                META_TRANSACTION_TYPEHASH,
                _useNonce(userAddress),
                userAddress,
                keccak256(functionSignature)
            )
        );
        bytes32 hash = _hashTypedDataV4(structHash);

        address signer = ECDSA.recover(hash, v, r, s);
        require(signer == userAddress, "ZKP: invalid signature");

        emit MetaTransactionExecuted(
            userAddress,
            msg.sender,
            functionSignature
        );

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returnData) = address(this).call(
            // Append userAddress at the end to extract it from calling context
            abi.encodePacked(functionSignature, userAddress)
        );
        require(success, "ZKP: Meta tx call failed");

        return returnData;
    }

    /// @notice Withdraws accidentally sent token from this contract
    /// @dev Owner may call only
    function claimErc20(
        address claimedToken,
        address to,
        uint256 amount
    ) external onlyOwner nonReentrant {
        _claimErc20(claimedToken, to, amount);
    }

    /// @notice Sets the minter role to given address
    /// @dev Account with the minter role may call only
    function setMinter(address _minter) public onlyMinter {
        _setMinter(_minter);
    }

    /// Internal and private functions follow

    // To support meta transactions, this to be used instead of msg.sender directly
    function _msgSender() internal view override returns (address sender) {
        if (msg.sender == address(this)) {
            bytes memory array = msg.data;
            uint256 index = msg.data.length;
            // solhint-disable-next-line no-inline-assembly
            assembly {
                // Load the address in lower 20 bytes of the 32 bytes word.
                sender := and(
                    mload(add(array, index)),
                    0xffffffffffffffffffffffffffffffffffffffff
                )
            }
        } else {
            sender = msg.sender;
        }
        return sender;
    }

    function _setMinter(address _minter) internal {
        require(_minter != address(0), "ZKP: zero minter address");
        minter = _minter;
    }

    function _throwLengthMismatch(uint256 l1, uint256 l2) private pure {
        require(l1 == l2, "ZKP: invalid input");
    }
}

File 2 of 13 : draft-ERC20Permit.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./draft-IERC20Permit.sol";
import "../ERC20.sol";
import "../../../utils/cryptography/draft-EIP712.sol";
import "../../../utils/cryptography/ECDSA.sol";
import "../../../utils/Counters.sol";

/**
 * @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * _Available since v3.4._
 */
abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 {
    using Counters for Counters.Counter;

    mapping(address => Counters.Counter) private _nonces;

    // solhint-disable-next-line var-name-mixedcase
    bytes32 private immutable _PERMIT_TYPEHASH =
        keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");

    /**
     * @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`.
     *
     * It's a good idea to use the same `name` that is defined as the ERC20 token name.
     */
    constructor(string memory name) EIP712(name, "1") {}

    /**
     * @dev See {IERC20Permit-permit}.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual override {
        require(block.timestamp <= deadline, "ERC20Permit: expired deadline");

        bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));

        bytes32 hash = _hashTypedDataV4(structHash);

        address signer = ECDSA.recover(hash, v, r, s);
        require(signer == owner, "ERC20Permit: invalid signature");

        _approve(owner, spender, value);
    }

    /**
     * @dev See {IERC20Permit-nonces}.
     */
    function nonces(address owner) public view virtual override returns (uint256) {
        return _nonces[owner].current();
    }

    /**
     * @dev See {IERC20Permit-DOMAIN_SEPARATOR}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view override returns (bytes32) {
        return _domainSeparatorV4();
    }

    /**
     * @dev "Consume a nonce": return the current value and increment.
     *
     * _Available since v4.1._
     */
    function _useNonce(address owner) internal virtual returns (uint256 current) {
        Counters.Counter storage nonce = _nonces[owner];
        current = nonce.current();
        nonce.increment();
    }
}

File 3 of 13 : IChildToken.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IChildToken {
    function deposit(address user, bytes calldata depositData) external;
}

File 4 of 13 : Claimable.sol
// SPDX-License-Identifier: MIT
pragma solidity >0.8.0;

/**
 * @title Claimable
 * @notice It withdraws accidentally sent tokens from this contract.
 * @dev It provides reentrancy guard. The code borrowed from openzeppelin-contracts.
 * Unlike original code, this version does not require `constructor` call.
 */
contract Claimable {
    bytes4 private constant SELECTOR_TRANSFER =
        bytes4(keccak256(bytes("transfer(address,uint256)")));

    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _reentrancyStatus;

    /// @dev Withdraws ERC20 tokens from this contract
    /// (take care of reentrancy attack risk mitigation)
    function _claimErc20(
        address token,
        address to,
        uint256 amount
    ) internal {
        // solhint-disable avoid-low-level-calls
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(SELECTOR_TRANSFER, to, amount)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "claimErc20: TRANSFER_FAILED"
        );
    }

    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_reentrancyStatus != _ENTERED, "claimErc20: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _reentrancyStatus = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _reentrancyStatus = _NOT_ENTERED;
    }
}

File 5 of 13 : ImmutableOwnable.sol
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-fixed, compiler-gt-0_8
pragma solidity ^0.8.0;

/// @title Staking
abstract contract ImmutableOwnable {
    /// @notice The owner who has privileged rights
    // solhint-disable-next-line var-name-mixedcase
    address public immutable OWNER;

    /// @dev Throws if called by any account other than the {OWNER}.
    modifier onlyOwner() {
        require(OWNER == msg.sender, "ImmOwn: unauthorized");
        _;
    }

    constructor(address _owner) {
        require(_owner != address(0), "ImmOwn: zero owner address");
        OWNER = _owner;
    }
}

File 6 of 13 : draft-IERC20Permit.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

File 7 of 13 : ERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.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 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:
     *
     * - `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);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - 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) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][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) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), 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:
     *
     * - `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);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(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:
     *
     * - `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 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 {}
}

File 8 of 13 : draft-EIP712.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./ECDSA.sol";

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
 * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
 * they need in their contracts using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * _Available since v3.4._
 */
abstract contract EIP712 {
    /* solhint-disable var-name-mixedcase */
    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;
    uint256 private immutable _CACHED_CHAIN_ID;

    bytes32 private immutable _HASHED_NAME;
    bytes32 private immutable _HASHED_VERSION;
    bytes32 private immutable _TYPE_HASH;

    /* solhint-enable var-name-mixedcase */

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    constructor(string memory name, string memory version) {
        bytes32 hashedName = keccak256(bytes(name));
        bytes32 hashedVersion = keccak256(bytes(version));
        bytes32 typeHash = keccak256(
            "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
        );
        _HASHED_NAME = hashedName;
        _HASHED_VERSION = hashedVersion;
        _CACHED_CHAIN_ID = block.chainid;
        _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
        _TYPE_HASH = typeHash;
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (block.chainid == _CACHED_CHAIN_ID) {
            return _CACHED_DOMAIN_SEPARATOR;
        } else {
            return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
        }
    }

    function _buildDomainSeparator(
        bytes32 typeHash,
        bytes32 nameHash,
        bytes32 versionHash
    ) private view returns (bytes32) {
        return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
    }
}

File 9 of 13 : ECDSA.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s;
        uint8 v;
        assembly {
            s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
            v := add(shr(255, vs), 27)
        }
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

File 10 of 13 : Counters.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

File 11 of 13 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^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 12 of 13 : IERC20Metadata.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @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);
}

File 13 of 13 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^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 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) {
        return msg.sender;
    }

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

Settings
{
  "metadata": {
    "bytecodeHash": "none"
  },
  "optimizer": {
    "enabled": true,
    "runs": 800
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"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":false,"internalType":"address","name":"userAddress","type":"address"},{"indexed":false,"internalType":"address","name":"relayerAddress","type":"address"},{"indexed":false,"internalType":"bytes","name":"functionSignature","type":"bytes"}],"name":"MetaTransactionExecuted","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":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"OWNER","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"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":"_spenders","type":"address[]"},{"internalType":"uint256[]","name":"_subtractedValues","type":"uint256[]"}],"name":"batchDecreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"_spenders","type":"address[]"},{"internalType":"uint256[]","name":"_addedValues","type":"uint256[]"}],"name":"batchIncreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"_recipients","type":"address[]"},{"internalType":"uint256[]","name":"_values","type":"uint256[]"}],"name":"batchTransfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address[]","name":"_recipients","type":"address[]"},{"internalType":"uint256[]","name":"_values","type":"uint256[]"}],"name":"batchTransferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"claimedToken","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"claimErc20","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":"user","type":"address"},{"internalType":"bytes","name":"depositData","type":"bytes"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"userAddress","type":"address"},{"internalType":"bytes","name":"functionSignature","type":"bytes"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"uint8","name":"v","type":"uint8"}],"name":"executeMetaTransaction","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"minter","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_minter","type":"address"}],"name":"setMinter","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":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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fdfea164736f6c6343000804000a000000000000000000000000208fb9169bbec5915722e0aff8b0eeedabf8a6f0

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

000000000000000000000000208fb9169bbec5915722e0aff8b0eeedabf8a6f0

-----Decoded View---------------
Arg [0] : owner (address): 0x208fb9169bbec5915722e0aff8b0eeedabf8a6f0

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000208fb9169bbec5915722e0aff8b0eeedabf8a6f0


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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