Contract 0x70cBb871E8f30Fc8Ce23609E9E0Ea87B6b222F58 18

 
Txn Hash Method
Block
From
To
Value [Txn Fee]
0xca915bd8629f6071bc4e26811228916c1cff184a694bf9f723ac064ba7c5a7b7Approve1829233002024-02-21 6:59:1788 days 16 hrs ago0x01f84d85885f799579dad86e63bdf92f66b8c4e0 IN  OKX DEX: Token Approve0 ETH0.000075160.1
0x65dbda0cd04d0551303f1447883d21065a337c3b01b6ccb5568c8548f7ab3872Approve1829228172024-02-21 6:57:1488 days 16 hrs ago0x01f84d85885f799579dad86e63bdf92f66b8c4e0 IN  OKX DEX: Token Approve0 ETH0.000067510.1
0x61420d68d67bf48ce64a17b428df891ed5d6c989c9b9b5ef86cc09f51c045b26Approve1782187512024-02-07 3:43:21102 days 19 hrs ago0xd1220b412afaa01b8aae1b194f27a485e58195e2 IN  OKX DEX: Token Approve0 ETH0.000103880.1
0x663c344aa2a672fbd3fed9f872964b4ce76c3f4fcccb57df50430643fd6ba104Transfer1651311862023-12-30 1:33:13141 days 21 hrs ago0xbc09ce1ce8f2eea3110a93695e372a1cb3c024cc IN  OKX DEX: Token Approve0.016646108841433 ETH0.000019090.1
0xc03d33e19bcceaff986fb8327af3e112449222984b277506be3303db1592908fTransfer Ownersh...1618334242023-12-20 7:01:49151 days 16 hrs ago0x06c95a3934d94d5ae5bf54731bd2840cefee6f87 IN  OKX DEX: Token Approve0 ETH0.00007552 0.1
0x4adf56516a1c1f36d40b0a143c501da707a830b9d330c1711e05a088ab00c18aTransfer1121477632023-07-17 13:37:57307 days 9 hrs ago0xa127647ef5f0670364ce56dbca6db64d2588c059 IN  OKX DEX: Token Approve0.001 ETH0.00003297 0.1
0xcb4e2eb8de5fec48b3c0ec9f259513b0023880450fe49c61df938ecdb6c4b95dTransfer974782822023-06-03 20:51:38351 days 2 hrs ago0x2792d75026b9a63f933751d59cfabd64b8cf3c73 IN  OKX DEX: Token Approve0.00173483808518 ETH0.000024360.1
0x535937e4d7f3e8bee06437d040d1707611be2352f9dfc2173de989d6e7e1990dTransfer Ownersh...817481962023-04-18 12:47:50397 days 10 hrs ago0xc82ea2afe1fd1d61c4a12f5ceb3d7000f564f5c6 IN  OKX DEX: Token Approve0 ETH0.00005691 0.1
0xd269e98531a42245f21088f881d008d8d2611e57d1664050b219dde3b58f5e9bTransfer801272432023-04-13 19:55:43402 days 3 hrs ago0xbdfa4d9fb96f014e59ab676bf223484e54334366 IN  OKX DEX: Token Approve0.00030928 ETH0.00004427 0.1
0x047bcad428bd25ef4b9acafa10678ba7a3b777937a231eb0c2dfb4813e19f0f6Transfer801266452023-04-13 19:53:11402 days 3 hrs ago0xbdfa4d9fb96f014e59ab676bf223484e54334366 IN  OKX DEX: Token Approve0.00055645 ETH0.00004717 0.1
0xdb55ff4654b5c6ec4c1ea67b7ceb7991dd5478eb75d471017c341657c3505d53Transfer801264912023-04-13 19:52:30402 days 3 hrs ago0xbdfa4d9fb96f014e59ab676bf223484e54334366 IN  OKX DEX: Token Approve0.00070363 ETH0.00004717 0.1
0x23c9ef819376e48ec7760fc2c81dee9da9e1a47d703dbef401084dc832278341Transfer801262892023-04-13 19:51:38402 days 3 hrs ago0xbdfa4d9fb96f014e59ab676bf223484e54334366 IN  OKX DEX: Token Approve0.0008508 ETH0.00004717 0.1
0xab05365a1c93daed82a7171d302ea581c99bca84c689b3d39be88353ce8f077fApprove728414322023-03-23 13:53:17423 days 9 hrs ago0x7a9cc140c906e2eb6c0940f13cc4be44d61a2e07 IN  OKX DEX: Token Approve0 ETH0.000088723.39859
0xee9eb02861a2e5ec6c777930c260ae59cfc05574e20af7d6a24db07426b594d9Set Approve Prox...140532892022-06-08 9:13:52711 days 14 hrs ago0xc82ea2afe1fd1d61c4a12f5ceb3d7000f564f5c6 IN  OKX DEX: Token Approve0 ETH0.000299706302 ETH0.648156572
0xc0fd8989c3c058339789118489d2a19856f770ccdc8a19c10c6b87399996f882Initialize140517462022-06-08 8:49:38711 days 14 hrs ago0xc82ea2afe1fd1d61c4a12f5ceb3d7000f564f5c6 IN  OKX DEX: Token Approve0 ETH0.000397134605 ETH0.648156572
0xc5e38de55c02b2de4465888fc988307ad39219f172a2e328f3dbc8c67f2805bd0x60806040140517402022-06-08 8:49:38711 days 14 hrs ago0xc82ea2afe1fd1d61c4a12f5ceb3d7000f564f5c6 IN  Create: TokenApprove0 ETH0.00490061721 ETH0.648156572
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xa80b3ae0c425c3a4899f3e7dbbebc769a97eac8b4e71402ef3a1229959db4357720852042023-03-21 10:12:43425 days 13 hrs ago OKX DEX: Token Approve 0xbc8de2c92a6ab6992bec11c1fbf42fad903eadfe0 ETH
0xa80b3ae0c425c3a4899f3e7dbbebc769a97eac8b4e71402ef3a1229959db4357720852042023-03-21 10:12:43425 days 13 hrs ago 0xe9bbd6ec0c9ca71d3dccd1282ee9de4f811e50af OKX DEX: Token Approve0 ETH
0x9650fd7ff8db69b3f130b2ff66064c1a85c0a1e65aab55dd74b6f5c4fc3746bb720839392023-03-21 10:07:27425 days 13 hrs ago OKX DEX: Token Approve ArbInu: ARBINU Token0 ETH
0x9650fd7ff8db69b3f130b2ff66064c1a85c0a1e65aab55dd74b6f5c4fc3746bb720839392023-03-21 10:07:27425 days 13 hrs ago 0xe9bbd6ec0c9ca71d3dccd1282ee9de4f811e50af OKX DEX: Token Approve0 ETH
0x602e5bd8e84ff2b54e5462c984d2d05280eb742d0b774df59f1556af52ec57b2720835112023-03-21 10:05:39425 days 13 hrs ago OKX DEX: Token Approve Tether: USDT Token0 ETH
0x602e5bd8e84ff2b54e5462c984d2d05280eb742d0b774df59f1556af52ec57b2720835112023-03-21 10:05:39425 days 13 hrs ago 0xe9bbd6ec0c9ca71d3dccd1282ee9de4f811e50af OKX DEX: Token Approve0 ETH
0x35015b323db4227d542a413a5a7c6c4ebd5609891992efb7771e8d68c8f10922720826612023-03-21 10:02:13425 days 13 hrs ago OKX DEX: Token Approve Tether: USDT Token0 ETH
0x35015b323db4227d542a413a5a7c6c4ebd5609891992efb7771e8d68c8f10922720826612023-03-21 10:02:13425 days 13 hrs ago 0xe9bbd6ec0c9ca71d3dccd1282ee9de4f811e50af OKX DEX: Token Approve0 ETH
0xeac4e961d4be911567481ad0a6fb92eaec6a6219660d5aede43e5480deb0a46d720820552023-03-21 9:59:40425 days 13 hrs ago OKX DEX: Token Approve Tether: USDT Token0 ETH
0xeac4e961d4be911567481ad0a6fb92eaec6a6219660d5aede43e5480deb0a46d720820552023-03-21 9:59:40425 days 13 hrs ago 0xe9bbd6ec0c9ca71d3dccd1282ee9de4f811e50af OKX DEX: Token Approve0 ETH
0x04c07b2fd315ead92ad562a0beef0d1850204a1f4b89d36c0ae82d3cc3bf9668720788872023-03-21 9:46:38425 days 13 hrs ago OKX DEX: Token Approve Tether: USDT Token0 ETH
0x04c07b2fd315ead92ad562a0beef0d1850204a1f4b89d36c0ae82d3cc3bf9668720788872023-03-21 9:46:38425 days 13 hrs ago 0xe9bbd6ec0c9ca71d3dccd1282ee9de4f811e50af OKX DEX: Token Approve0 ETH
0x60ec968cde21049508bb9a5d2db0c5967dc38ca59d14644df3d1bc859428e2c0720782812023-03-21 9:44:12425 days 13 hrs ago OKX DEX: Token Approve Treasure DAO: Magic Token0 ETH
0x60ec968cde21049508bb9a5d2db0c5967dc38ca59d14644df3d1bc859428e2c0720782812023-03-21 9:44:12425 days 13 hrs ago 0xe9bbd6ec0c9ca71d3dccd1282ee9de4f811e50af OKX DEX: Token Approve0 ETH
0x0674b0a455169693267b353ba57c45db223b8bc60ee05f6c592f5160ae7be9c3720765802023-03-21 9:37:12425 days 13 hrs ago OKX DEX: Token Approve Tether: USDT Token0 ETH
0x0674b0a455169693267b353ba57c45db223b8bc60ee05f6c592f5160ae7be9c3720765802023-03-21 9:37:12425 days 13 hrs ago 0xe9bbd6ec0c9ca71d3dccd1282ee9de4f811e50af OKX DEX: Token Approve0 ETH
0xcc5ad91162a2c8111c7c5287f9df832cf3921ba74f7bbb808848daad29487bde720751742023-03-21 9:31:24425 days 13 hrs ago OKX DEX: Token Approve Radiant: Old RDNT Token0 ETH
0xcc5ad91162a2c8111c7c5287f9df832cf3921ba74f7bbb808848daad29487bde720751742023-03-21 9:31:24425 days 13 hrs ago 0xe9bbd6ec0c9ca71d3dccd1282ee9de4f811e50af OKX DEX: Token Approve0 ETH
0xb9b64345202598b42e1052b2270debef0d2b898bb81e0bc72d72010433267135720747902023-03-21 9:29:48425 days 13 hrs ago OKX DEX: Token Approve Arbitrum: USDC Token0 ETH
0xb9b64345202598b42e1052b2270debef0d2b898bb81e0bc72d72010433267135720747902023-03-21 9:29:48425 days 13 hrs ago 0xe9bbd6ec0c9ca71d3dccd1282ee9de4f811e50af OKX DEX: Token Approve0 ETH
0x09092800f09f19ef5a0ef9086fa394024424046690afe99c277b54021f19a9d6720730142023-03-21 9:22:29425 days 13 hrs ago OKX DEX: Token Approve Tether: USDT Token0 ETH
0x09092800f09f19ef5a0ef9086fa394024424046690afe99c277b54021f19a9d6720730142023-03-21 9:22:29425 days 13 hrs ago 0xe9bbd6ec0c9ca71d3dccd1282ee9de4f811e50af OKX DEX: Token Approve0 ETH
0x8b15ebaef0b7c3459dc180474b26259f53c3fd971594923870cd85020b2f7aa1720729992023-03-21 9:22:25425 days 13 hrs ago OKX DEX: Token Approve Tether: USDT Token0 ETH
0x8b15ebaef0b7c3459dc180474b26259f53c3fd971594923870cd85020b2f7aa1720729992023-03-21 9:22:25425 days 13 hrs ago 0xe9bbd6ec0c9ca71d3dccd1282ee9de4f811e50af OKX DEX: Token Approve0 ETH
0xd92383a39372b1984ba33ca18754ceb09072cf79b285b1d6be2f877c7ec39611720726102023-03-21 9:20:48425 days 14 hrs ago OKX DEX: Token Approve Arbitrum: USDC Token0 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
TokenApprove

Compiler Version
v0.8.6+commit.11564f7e

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Arbiscan.io on 2023-06-26
*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)

// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
 * initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() initializer {}
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        // If the contract is initializing we ignore whether _initialized is set in order to support multiple
        // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
        // contract may have been reentered.
        require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} modifier, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    function _isConstructor() private view returns (bool) {
        return !AddressUpgradeable.isContract(address(this));
    }
}

/**
 * @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 ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

/**
 * @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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_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 {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

interface IERC20 {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);

    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint8);

    function totalSupply() external view returns (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

    function approve(address spender, uint256 value) external returns (bool);

    function transfer(address to, uint256 value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);
}

library SafeMath {
    uint256 constant WAD = 10**18;
    uint256 constant RAY = 10**27;

    function wad() public pure returns (uint256) {
        return WAD;
    }

    function ray() public pure returns (uint256) {
        return RAY;
    }

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }

    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a <= b ? a : b;
    }

    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    function sqrt(uint256 a) internal pure returns (uint256 b) {
        if (a > 3) {
            b = a;
            uint256 x = a / 2 + 1;
            while (x < b) {
                b = x;
                x = (a / x + x) / 2;
            }
        } else if (a != 0) {
            b = 1;
        }
    }

    function wmul(uint256 a, uint256 b) internal pure returns (uint256) {
        return mul(a, b) / WAD;
    }

    function wmulRound(uint256 a, uint256 b) internal pure returns (uint256) {
        return add(mul(a, b), WAD / 2) / WAD;
    }

    function rmul(uint256 a, uint256 b) internal pure returns (uint256) {
        return mul(a, b) / RAY;
    }

    function rmulRound(uint256 a, uint256 b) internal pure returns (uint256) {
        return add(mul(a, b), RAY / 2) / RAY;
    }

    function wdiv(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(mul(a, WAD), b);
    }

    function wdivRound(uint256 a, uint256 b) internal pure returns (uint256) {
        return add(mul(a, WAD), b / 2) / b;
    }

    function rdiv(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(mul(a, RAY), b);
    }

    function rdivRound(uint256 a, uint256 b) internal pure returns (uint256) {
        return add(mul(a, RAY), b / 2) / b;
    }

    function wpow(uint256 x, uint256 n) internal pure returns (uint256) {
        uint256 result = WAD;
        while (n > 0) {
            if (n % 2 != 0) {
                result = wmul(result, x);
            }
            x = wmul(x, x);
            n /= 2;
        }
        return result;
    }

    function rpow(uint256 x, uint256 n) internal pure returns (uint256) {
        uint256 result = RAY;
        while (n > 0) {
            if (n % 2 != 0) {
                result = rmul(result, x);
            }
            x = rmul(x, x);
            n /= 2;
        }
        return result;
    }

    function divCeil(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 quotient = div(a, b);
        uint256 remainder = a - quotient * b;
        if (remainder > 0) {
            return quotient + 1;
        } else {
            return quotient;
        }
    }
}

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            codehash := extcodehash(account)
        }
        return (codehash != accountHash && codehash != 0x0);
    }

    /**
     * @dev Converts an `address` into `address payable`. Note that this is
     * simply a type cast: the actual underlying value is not changed.
     *
     * _Available since v2.4.0._
     */
    function toPayable(address account)
        internal
        pure
        returns (address payable)
    {
        return payable(account);
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     *
     * _Available since v2.4.0._
     */
    function sendValue(address recipient, uint256 amount) internal {
        require(
            address(this).balance >= amount,
            "Address: insufficient balance"
        );

        // solhint-disable-next-line avoid-call-value
        (bool success, ) = recipient.call{value: amount}("");
        require(
            success,
            "Address: unable to send value, recipient may have reverted"
        );
    }
}

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        callOptionalReturn(
            token,
            abi.encodeWithSelector(token.transfer.selector, to, value)
        );
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        callOptionalReturn(
            token,
            abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
        );
    }

    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        callOptionalReturn(
            token,
            abi.encodeWithSelector(token.approve.selector, spender, value)
        );
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(
            value
        );
        callOptionalReturn(
            token,
            abi.encodeWithSelector(
                token.approve.selector,
                spender,
                newAllowance
            )
        );
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(
            value,
            "SafeERC20: decreased allowance below zero"
        );
        callOptionalReturn(
            token,
            abi.encodeWithSelector(
                token.approve.selector,
                spender,
                newAllowance
            )
        );
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves.

        // A Solidity high level call has three parts:
        //  1. The target address is checked to verify it contains contract code
        //  2. The call itself is made, and success asserted
        //  3. The return value is decoded, which in turn checks the size of the returned data.
        // solhint-disable-next-line max-line-length
        require(address(token).isContract(), "SafeERC20: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = address(token).call(data);
        require(success, "SafeERC20: low-level call failed");

        if (returndata.length > 0) {
            // Return data is optional
            // solhint-disable-next-line max-line-length
            require(
                abi.decode(returndata, (bool)),
                "SafeERC20: ERC20 operation did not succeed"
            );
        }
    }
}

/// @title Handle authorizations in dex platform
/// @notice Explain to an end user what this does
/// @dev Explain to a developer any extra details
contract TokenApprove is OwnableUpgradeable {
  using SafeERC20 for IERC20;

  address public tokenApproveProxy;

  function initialize(address _tokenApproveProxy) public initializer {
    __Ownable_init();
    tokenApproveProxy = _tokenApproveProxy;
  }

  //-------------------------------
  //------- Events ----------------
  //-------------------------------

  event ProxyUpdate(address indexed oldProxy, address indexed newProxy);

  //-------------------------------
  //------- Modifier --------------
  //-------------------------------

  //--------------------------------
  //------- Internal Functions -----
  //--------------------------------

  //---------------------------------
  //------- Admin functions ---------
  //---------------------------------

  function setApproveProxy(address _newTokenApproveProxy) external onlyOwner {
    emit ProxyUpdate(tokenApproveProxy, _newTokenApproveProxy);
    tokenApproveProxy = _newTokenApproveProxy;
  }

  //---------------------------------
  //-------  Users Functions --------
  //---------------------------------

  function claimTokens(
    address _token,
    address _who,
    address _dest,
    uint256 _amount
  ) external {
    require(msg.sender == tokenApproveProxy, "TokenApprove: Access restricted");
    if (_amount > 0) {
      IERC20(_token).safeTransferFrom(_who, _dest, _amount);
    }
  }
}

Contract ABI

[{"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":"oldProxy","type":"address"},{"indexed":true,"internalType":"address","name":"newProxy","type":"address"}],"name":"ProxyUpdate","type":"event"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_who","type":"address"},{"internalType":"address","name":"_dest","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"claimTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_tokenApproveProxy","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newTokenApproveProxy","type":"address"}],"name":"setApproveProxy","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"tokenApproveProxy","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Metadata Hash

559d424c779ab4830f23f8b7af2f1b1c0abd68974d6b192dc8cf1211591ac58b
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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