Contract 0xc392133eea695603b51a5d5de73655d571c2ce51

 
Txn Hash Method
Index
From
To
Value
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c6Claim Reward86588272022-05-20 10:32:0212 mins ago0x7da08fba7a69c67c0d06fd433af0c53f9c75cee8 IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000894800870.001
0x832989cac7b1a96773f6868f1eedd659672805a27880351259c5ae98def9e975Claim Reward86565172022-05-20 9:43:151 hr 1 min ago0x138dd537d56f2f2761a6fc0a2a0ace67d55480fe IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000813423350.001
0x851b7806f5e002c1c78fca5a9448de40e9102394c0971964410b81090a39580fClaim Reward86554482022-05-20 9:21:281 hr 22 mins ago0xc5dba66fbb40081a51f8f7e327660eb347fa441d IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000483491010.001
0x32f387f271d141a0ad9bf831c084aebfb09dad2777ec34726c6d20be322e597bStake86542892022-05-20 8:59:351 hr 44 mins ago0x0b0dceaa947ab8b965e87f1191a501cf88c44cbf IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000435787860.001
0x5565504c03ed7c400e4b866e78f367d2dbb5f251d2aed4a34957086dd9a749bfStake86535052022-05-20 8:40:132 hrs 4 mins ago0x169379d950ceffa34f5d92e33e40b7f3787f0f71 IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000364389140.001
0x721b884781ecf3825fbf3594fd77bea8659b6a6f0bcd258650f3e6a1a12a6c41Claim Reward86522892022-05-20 8:18:182 hrs 26 mins ago0x169379d950ceffa34f5d92e33e40b7f3787f0f71 IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000559641970.001
0xd1217affd5ab1a7526c114748a0038a316d3a47609139184d7d789c385accde8Stake86520712022-05-20 8:11:482 hrs 32 mins ago0xb24ce065a3a9bbcced4b74b6f4435b852286396d IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000768930390.001
0x89a912ff2bef22cd67c939e4e04f64316855c5da7082be8f44858bba4b9ce055Claim Reward86518922022-05-20 8:09:152 hrs 35 mins ago0xb24ce065a3a9bbcced4b74b6f4435b852286396d IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000512351870.001
0x52863645b9e22538455c4acb8deb4a4e3973fab3a05d4820ca6492e17ab02b25Unstake86517252022-05-20 8:05:582 hrs 38 mins ago0xea04a9fe2cef51b504e7da8cf1b859454ae27030 IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000465714380.001
0x5e542a407815cccda8c6ae59079a2e6cb04f3c6e75f0a3ccaf119496332045dfStake86502112022-05-20 7:29:503 hrs 14 mins ago0x567f02bd4010082a740db2cf1b9a6611b7be6e2f IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000930435740.001
0x77dc6c06e211bc8859cce1f19891c7969c0089f4b533d9a39bf5b64cb4290274Claim Reward86501442022-05-20 7:27:003 hrs 17 mins ago0x567f02bd4010082a740db2cf1b9a6611b7be6e2f IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0001082406890.001
0xb1b2e59cb1652d08f22ccd1d1b6605395f6c0164cc9b522d1f59a53663ec2d76Claim Reward86495092022-05-20 7:12:133 hrs 32 mins ago 0x797bc498edee4357a16a1054db0323cbd04c84c3 IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000451126850.001
0x17cc6730e9a7dcc631af698e1ed7f2ee8a0c9177a89b411ddfa243092faf2ae0Stake86491632022-05-20 7:04:253 hrs 39 mins ago0x9c4d592042f959254485d443bbc337d29572264f IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000783402770.001
0xe24c2e66619c4f063aa51b708c1be4da8928fc9f48d021c73d0270ebed424468Claim Reward86491492022-05-20 7:04:093 hrs 40 mins ago0x9c4d592042f959254485d443bbc337d29572264f IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000741057180.001
0x7eb1cf9935c04890d5badd360549657323155addb5348f7f32272802be10dd4bClaim Reward86462432022-05-20 5:55:254 hrs 48 mins ago0x9f0a988edc96dac834c158ebfe667da932bd87c6 IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.00006127630.001
0x006e907590e837fa7a506a47181dd8e9be9215e4d5a9f77b3df3704bdd4268edClaim Reward86457982022-05-20 5:44:334 hrs 59 mins ago0xc40d9c885c9b732884135869ebb702d48a43f895 IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000518123160.001
0xd6a218cca7a040b07837bdfdd3066c629f041e71474c3dc671f84e8154f78948Claim Reward86456802022-05-20 5:41:585 hrs 2 mins ago0x8630821cd31ff019e7addfe0d21c3f401a436d0f IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000882678080.001
0x1b92c15c324602cce417aaaf3a13159663354616286044270dbde8911fbaa992Claim Reward86420522022-05-20 3:54:286 hrs 49 mins ago0xcb744534a44083acd8c3b0b0b2d6e06faa50b9aa IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000454857670.001
0x9e9399506563a3db1523db769f588d3a6226cdc6f4c5880fc2e8fbf401dc0feaClaim Reward86414852022-05-20 3:33:597 hrs 10 mins ago0xdfab977372a039e78839687b8c359465f0f17532 IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000609101220.001
0xd2140886635da86cb056dc6653ec9a2c50dcd311b5a395d186845bfddbbd9be5Start Unstake86387382022-05-20 2:10:508 hrs 33 mins ago0xdf3910d26836318379903a47bd26d0e05cc9a0f5 IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0001262206820.001
0x3b7d15e1689f0a40e7b1825189742bb4688deaa2a3e6343a2da0ac10214c3a33Claim Reward86386932022-05-20 2:08:268 hrs 35 mins ago0xbfe384d79969bcb583b8a0e5fedc314aee480e7e IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0001635526940.001
0x6444e3694edccd08e9b98d551ef56c3952581fbfae4b3d60ac479cb6307464faStake86365402022-05-20 1:26:249 hrs 17 mins ago0xcba9f4a67a51fea7023e09030e75523ad6f41533 IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000852499510.001
0x16694e7d3568a05ff23e1ed914c072d3a86e195634a2c1a21e03d05f93677dc1Claim Reward86365262022-05-20 1:25:369 hrs 18 mins ago0xcba9f4a67a51fea7023e09030e75523ad6f41533 IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000804137510.001
0xed66fea1c77d3e68d476effa8dc07ca49122446b52829b192ae55fe85da73df4Claim Reward86359972022-05-20 1:14:009 hrs 30 mins ago0x28a7b0d5f5a57fe769b9305ac73b7c03d6451fa5 IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000875791220.001
0x5a3849a3e90ed5a895b5f3eef58444760e1eae976407bf06c39c086b42e2b778Claim Reward86356802022-05-20 1:07:129 hrs 37 mins ago0x1e4dd0ce1d3a694c37d34b4f9750d35f4fcd777b IN  0xc392133eea695603b51a5d5de73655d571c2ce510 Ether0.0000730012130.001
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x419b1f843b793558c9473cac69f5331f8693bb8872b84106b19f182aea45c7fa86589722022-05-20 10:36:287 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0xf1b35fac306cd6fb0008c229f056314c139a3c660 Ether
0x419b1f843b793558c9473cac69f5331f8693bb8872b84106b19f182aea45c7fa86589722022-05-20 10:36:287 mins ago 0x160ca569999601bca06109d42d561d85d6bb4b57 0xc392133eea695603b51a5d5de73655d571c2ce510 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0xf1b35fac306cd6fb0008c229f056314c139a3c660 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xa25816b9605009aa446d4d597f0aa46fd828f056 0xc392133eea695603b51a5d5de73655d571c2ce510 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0xc44dfc6ffaf195e2535fc13d75a79d92384597820 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0x3198ab211cdf3e4d13a698e1fb819507bca2e5790 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0xa25816b9605009aa446d4d597f0aa46fd828f0560 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0xa25816b9605009aa446d4d597f0aa46fd828f0560 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0x939313420a85ab8f21b8c2fe15b60528f34e0d630 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51Synthetix: Address Resolver0 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0xf4aef21d906992afadde7a9676e1db4feb6390dd0 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0x939313420a85ab8f21b8c2fe15b60528f34e0d630 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51Synthetix: Address Resolver0 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0x939313420a85ab8f21b8c2fe15b60528f34e0d630 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51Synthetix: Address Resolver0 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0x939313420a85ab8f21b8c2fe15b60528f34e0d630 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51Synthetix: Address Resolver0 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0xa25816b9605009aa446d4d597f0aa46fd828f0560 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0xa25816b9605009aa446d4d597f0aa46fd828f0560 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0xa25816b9605009aa446d4d597f0aa46fd828f0560 Ether
0xf98753c0a2466a00c8fd18298f42b0bbf0b83340521bb7242665703c0b2df5c686588272022-05-20 10:32:0212 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0xf1b35fac306cd6fb0008c229f056314c139a3c660 Ether
0xe36c4a4daf709a231b43a9a793b1fd58fbf134c9dfd0dd2130245fc25600cee586566762022-05-20 9:47:1657 mins ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0xf1b35fac306cd6fb0008c229f056314c139a3c660 Ether
0xe36c4a4daf709a231b43a9a793b1fd58fbf134c9dfd0dd2130245fc25600cee586566762022-05-20 9:47:1657 mins ago 0x5ae7454827d83526261f3871c1029792644ef1b1 0xc392133eea695603b51a5d5de73655d571c2ce510 Ether
0x832989cac7b1a96773f6868f1eedd659672805a27880351259c5ae98def9e97586565172022-05-20 9:43:151 hr 1 min ago 0xc392133eea695603b51a5d5de73655d571c2ce51 0xf1b35fac306cd6fb0008c229f056314c139a3c660 Ether
0x832989cac7b1a96773f6868f1eedd659672805a27880351259c5ae98def9e97586565172022-05-20 9:43:151 hr 1 min ago 0xa25816b9605009aa446d4d597f0aa46fd828f056 0xc392133eea695603b51a5d5de73655d571c2ce510 Ether
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0xf18D727C034f47AE2C0FE221C1cf4A15f0557b5F

Contract Name:
TransparentUpgradeableProxy

Compiler Version
v0.8.2+commit.661d1103

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at optimistic.etherscan.io on 2021-11-13
*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
}

/**
 * @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) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967Upgrade {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallSecure(address newImplementation, bytes memory data, bool forceCall) internal {
        address oldImplementation = _getImplementation();

        // Initial upgrade and setup call
        _setImplementation(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }

        // Perform rollback test if not already in progress
        StorageSlot.BooleanSlot storage rollbackTesting = StorageSlot.getBooleanSlot(_ROLLBACK_SLOT);
        if (!rollbackTesting.value) {
            // Trigger rollback using upgradeTo from the new implementation
            rollbackTesting.value = true;
            Address.functionDelegateCall(
                newImplementation,
                abi.encodeWithSignature(
                    "upgradeTo(address)",
                    oldImplementation
                )
            );
            rollbackTesting.value = false;
            // Check rollback was effective
            require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades");
            // Finally reset to the new implementation and log the upgrade
            _setImplementation(newImplementation);
            emit Upgraded(newImplementation);
        }
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Emitted when the beacon is upgraded.
     */
    event BeaconUpgraded(address indexed beacon);

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(
            Address.isContract(newBeacon),
            "ERC1967: new beacon is not a contract"
        );
        require(
            Address.isContract(IBeacon(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }
}

/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())

            switch result
            // delegatecall returns 0 on error.
            case 0 { revert(0, returndatasize()) }
            default { return(0, returndatasize()) }
        }
    }

    /**
     * @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback () external payable virtual {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive () external payable virtual {
        _fallback();
    }

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overriden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {
    }
}

/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 */
contract ERC1967Proxy is Proxy, ERC1967Upgrade {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     *
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializating the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) payable {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        _upgradeToAndCall(_logic, _data, false);
    }

    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal view virtual override returns (address impl) {
        return ERC1967Upgrade._getImplementation();
    }
}

/**
 * @dev This contract implements a proxy that is upgradeable by an admin.
 *
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 *
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches one of the admin functions exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
 * implementation. If the admin tries to call a function on the implementation it will fail with an error that says
 * "admin cannot fallback to proxy target".
 *
 * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
 * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
 * to sudden errors when trying to call a function from the proxy implementation.
 *
 * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
 * you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy.
 */
contract TransparentUpgradeableProxy is ERC1967Proxy {
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {ERC1967Proxy-constructor}.
     */
    constructor(address _logic, address admin_, bytes memory _data) payable ERC1967Proxy(_logic, _data) {
        assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
        _changeAdmin(admin_);
    }

    /**
     * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
     */
    modifier ifAdmin() {
        if (msg.sender == _getAdmin()) {
            _;
        } else {
            _fallback();
        }
    }

    /**
     * @dev Returns the current admin.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyAdmin}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function admin() external ifAdmin returns (address admin_) {
        admin_ = _getAdmin();
    }

    /**
     * @dev Returns the current implementation.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyImplementation}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function implementation() external ifAdmin returns (address implementation_) {
        implementation_ = _implementation();
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-changeProxyAdmin}.
     */
    function changeAdmin(address newAdmin) external virtual ifAdmin {
        _changeAdmin(newAdmin);
    }

    /**
     * @dev Upgrade the implementation of the proxy.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}.
     */
    function upgradeTo(address newImplementation) external ifAdmin {
        _upgradeToAndCall(newImplementation, bytes(""), false);
    }

    /**
     * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
     * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
     * proxied contract.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgradeAndCall}.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin {
        _upgradeToAndCall(newImplementation, data, true);
    }

    /**
     * @dev Returns the current admin.
     */
    function _admin() internal view virtual returns (address) {
        return _getAdmin();
    }

    /**
     * @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
     */
    function _beforeFallback() internal virtual override {
        require(msg.sender != _getAdmin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target");
        super._beforeFallback();
    }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"_logic","type":"address"},{"internalType":"address","name":"admin_","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"}],"stateMutability":"payable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"previousAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"beacon","type":"address"}],"name":"BeaconUpgraded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"admin_","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"changeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"implementation_","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"}],"name":"upgradeTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"stateMutability":"payable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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Deployed ByteCode Sourcemap

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Swarm Source

ipfs://93f028255035b61df476b13b9dba3c4f06f60e51b9b4caee31680b389aef327f
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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