Contract 0x68d936cb4723bdd38c488fd50514803f96789d2d 10

Contract Overview

Balance:
550.58 HT

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x0a79c3824d870bf125d5ba1483ae762a819a3d9ff3178b232a7ea726767e4dfcSend119831282022-01-22 8:28:3724 mins ago0x3834a1da160bc357b0564e25102693130d5df1f2 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170989 1
0x5ab502be5c563f63ded65e5b9e3575d4c1fee91672362e8cc5ad4ade9254b45cSend119831252022-01-22 8:28:2824 mins ago0x3834a1da160bc357b0564e25102693130d5df1f2 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170989 1
0x6da8839f100a8935e97ddde758d3c41fb86c71499dcfa4662e068888bd23ccfbSend119831222022-01-22 8:28:1924 mins ago0x3834a1da160bc357b0564e25102693130d5df1f2 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170965 1
0x22fe4a0c178405c557290826aee8f3452be6b635aa005e4973733127e644a1c7Send119831182022-01-22 8:28:0724 mins ago0x3834a1da160bc357b0564e25102693130d5df1f2 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170965 1
0x3beca7cc8ba58bcce8bbcebc1d79170c3b9f40793f70d97fc0ad89f3484a1453Send119825662022-01-22 8:00:3152 mins ago0x07035c03cf6d42da868e42ca48bf33a097644531 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170977 1
0x2b60b4b7e691fcae3c4418c186f08adfbbc15916cf359821c6fe38aa5d954965Send119824542022-01-22 7:54:5558 mins ago0xc842575acd573015c982421bd0b6607d498eecfe IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170977 1
0x779bb98d9ac1ba7e1fa11c360bf1bfc39a55c790467c587acd2e76458134a0b3Send119818882022-01-22 7:26:371 hr 26 mins ago0x38a84a36d792246c9d383bdd8e27e080da2c699a IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000166177 1
0x7321a6d3b11f0003d0cf2a66217a6b29a406e374b399d2274fac8a5e8ac4c226Send119818402022-01-22 7:24:131 hr 28 mins ago0x38a84a36d792246c9d383bdd8e27e080da2c699a IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000166189 1
0x4adcd11722851833c476c0e9aaafcd22cfb889ec44896a26e207097738efefb1Send119817382022-01-22 7:19:071 hr 33 mins ago0xef686db7060492550c2644263937b9368d6ff717 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170989 1
0x4310445bb4d4123efb2fb7b5733904975a6d5e605ff0f853d8b6a60f4bed01efSend119813242022-01-22 6:58:251 hr 54 mins ago0x4e792c4bb2f0dd14003faaf8a496db72f7720f00 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000166129 1
0xe834f2df15058d9a3b367771b271cebfd9399c3a8155cb8ed36220ba0f99b47aSend119812192022-01-22 6:53:101 hr 59 mins ago0x4e792c4bb2f0dd14003faaf8a496db72f7720f00 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000166141 1
0xe2856daad70df94f3051a8100c9c93d0890d072b4ed4895276da346e2299946aSend119811212022-01-22 6:48:162 hrs 4 mins ago0x207d072b46828e78eb9e2280c87a117e06f43bd3 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000166165 1
0x8461f57b16ab34ed2e033e11a8e914c97ce3402e2feeaeca0849df90ed0161c6Send119810382022-01-22 6:44:072 hrs 8 mins ago0x207d072b46828e78eb9e2280c87a117e06f43bd3 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000166189 1
0xd0ef1dc64fba7860c770b965d5200d85f301dfcd89fc482e58df9eaa91be1febSend119806102022-01-22 6:22:432 hrs 30 mins ago0xbeadbce808b3895b299add3cb638ae25331e3d62 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000166165 1
0x538b6963c6104395c0a3b9df8562d48029061399a72f88cb3f10527ef13070b9Send119805502022-01-22 6:19:432 hrs 33 mins ago0xbeadbce808b3895b299add3cb638ae25331e3d62 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000166189 1
0x954f1a651cb67058d377b40ebe39f52a7d2835d63239d9aba6a4f642d1056477Send119803902022-01-22 6:11:432 hrs 41 mins ago0x64a453fdbdfba5d30e4451e3c5e72c3561f4d494 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000166165 1
0xdec0a7774806affdffd427847183d5d04ee24b2a353a63b90475850b2b8c4c3fSend119803832022-01-22 6:11:222 hrs 41 mins ago0x3471cc3ce195f49bcac9f1c8d995cbcec560bf68 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170989 1
0x0e8a99671bf99fd9cb0045502f35a307c58149ed35937b6fbc58789e935a8260Send119803792022-01-22 6:11:102 hrs 41 mins ago0x3471cc3ce195f49bcac9f1c8d995cbcec560bf68 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170989 1
0x8814840174ba8e2c4e2036c8aa7f17bd43caaf1f23bc92407bc84a5153053212Send119803752022-01-22 6:10:582 hrs 42 mins ago0x3471cc3ce195f49bcac9f1c8d995cbcec560bf68 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170965 1
0xab0a7035d0ecfa064c1282b6c7be23ccd991c039f9682d619600bd012b2ff27fSend119803722022-01-22 6:10:492 hrs 42 mins ago0x3471cc3ce195f49bcac9f1c8d995cbcec560bf68 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170965 1
0x35dffd6137456d15e0c1818f835021ff73419853e3936c0807afe44d821c59abSend119803352022-01-22 6:08:582 hrs 44 mins ago0x64a453fdbdfba5d30e4451e3c5e72c3561f4d494 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000166189 1
0xf301dd467003b72c60879e1ffab06049af4e2b7bc488cc931544ad5a8cc44ffcSend119801942022-01-22 6:01:552 hrs 51 mins ago0x382d6034260bf774d8105a5e8f65e925dc19e08a IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170977 1
0x038a341019eeb3ff74fb873faf98c96e3ba4c1ed22c103a229ac2605934f630dSend119798232022-01-22 5:43:223 hrs 9 mins ago0xdbddf4b289ca27a4f35497095ef7f1176dc96db3 IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.111 HT0.000106823 1
0xbf22458e3380c67b62910f2168c21964a902f5419ff5192f78364fd2baaf9da2Send119793922022-01-22 5:21:493 hrs 31 mins ago0xe66447fb0fb73465b345d7c8ceeccd22d695e36d IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170977 1
0xbc67bebd2d4a1bea0751a54e0f26d8586351c1bd4a925da8773f8be412ebb633Send119793712022-01-22 5:20:463 hrs 32 mins ago0xe66447fb0fb73465b345d7c8ceeccd22d695e36d IN  0x68d936cb4723bdd38c488fd50514803f96789d2d0.1 HT0.000170977 1
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x85490387c3e20439facdf4be5f244ada99a757f41fff436437391b8b73890a7c119832522022-01-22 8:34:4918 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x8c0b4d2b72b6be81f92bc09ee24606d55fe356a50 HT
0x85490387c3e20439facdf4be5f244ada99a757f41fff436437391b8b73890a7c119832522022-01-22 8:34:4918 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x8c0b4d2b72b6be81f92bc09ee24606d55fe356a50 HT
0x85490387c3e20439facdf4be5f244ada99a757f41fff436437391b8b73890a7c119832522022-01-22 8:34:4918 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d0xe867e7269c733795445388cadd08cdcfe7fae91a0 HT
0x85490387c3e20439facdf4be5f244ada99a757f41fff436437391b8b73890a7c119832522022-01-22 8:34:4918 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d0x3d1aee342a50e1dc6b8acb72cf48905288255fc40 HT
0x85490387c3e20439facdf4be5f244ada99a757f41fff436437391b8b73890a7c119832522022-01-22 8:34:4918 mins ago 0xb1eb9869c8f3b50a98d960a5512d2bf0faa56c32 0x68d936cb4723bdd38c488fd50514803f96789d2d0 HT
0x1121e50fb6e98005d6f03bb87004d23baedb30b98021e0a28ed8524d3e6e888a119832362022-01-22 8:34:0118 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x2ce407ed308faddcffbfd9eec241bb698d29aadf0 HT
0x1121e50fb6e98005d6f03bb87004d23baedb30b98021e0a28ed8524d3e6e888a119832362022-01-22 8:34:0118 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x2ce407ed308faddcffbfd9eec241bb698d29aadf0 HT
0x1121e50fb6e98005d6f03bb87004d23baedb30b98021e0a28ed8524d3e6e888a119832362022-01-22 8:34:0118 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d0xe867e7269c733795445388cadd08cdcfe7fae91a0 HT
0x1121e50fb6e98005d6f03bb87004d23baedb30b98021e0a28ed8524d3e6e888a119832362022-01-22 8:34:0118 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d0x3d1aee342a50e1dc6b8acb72cf48905288255fc40 HT
0x1121e50fb6e98005d6f03bb87004d23baedb30b98021e0a28ed8524d3e6e888a119832362022-01-22 8:34:0118 mins ago 0xb1eb9869c8f3b50a98d960a5512d2bf0faa56c32 0x68d936cb4723bdd38c488fd50514803f96789d2d0 HT
0x504d093d880e2207aadcbaaea816189e216eafbe7306c181a80860697d599526119832062022-01-22 8:32:3120 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x41ec55d7455427d2a7a8b573f89cb4646e3731bd0 HT
0x504d093d880e2207aadcbaaea816189e216eafbe7306c181a80860697d599526119832062022-01-22 8:32:3120 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x41ec55d7455427d2a7a8b573f89cb4646e3731bd0 HT
0x504d093d880e2207aadcbaaea816189e216eafbe7306c181a80860697d599526119832062022-01-22 8:32:3120 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d0xe867e7269c733795445388cadd08cdcfe7fae91a0 HT
0x504d093d880e2207aadcbaaea816189e216eafbe7306c181a80860697d599526119832062022-01-22 8:32:3120 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d0x3d1aee342a50e1dc6b8acb72cf48905288255fc40 HT
0x504d093d880e2207aadcbaaea816189e216eafbe7306c181a80860697d599526119832062022-01-22 8:32:3120 mins ago 0xb1eb9869c8f3b50a98d960a5512d2bf0faa56c32 0x68d936cb4723bdd38c488fd50514803f96789d2d0 HT
0x0a79c3824d870bf125d5ba1483ae762a819a3d9ff3178b232a7ea726767e4dfc119831282022-01-22 8:28:3724 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x67bb13debae731ad1506686023db944080f793d40 HT
0x0a79c3824d870bf125d5ba1483ae762a819a3d9ff3178b232a7ea726767e4dfc119831282022-01-22 8:28:3724 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x67bb13debae731ad1506686023db944080f793d40 HT
0x0a79c3824d870bf125d5ba1483ae762a819a3d9ff3178b232a7ea726767e4dfc119831282022-01-22 8:28:3724 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x67bb13debae731ad1506686023db944080f793d40 HT
0x0a79c3824d870bf125d5ba1483ae762a819a3d9ff3178b232a7ea726767e4dfc119831282022-01-22 8:28:3724 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x67bb13debae731ad1506686023db944080f793d40 HT
0x0a79c3824d870bf125d5ba1483ae762a819a3d9ff3178b232a7ea726767e4dfc119831282022-01-22 8:28:3724 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x67bb13debae731ad1506686023db944080f793d40 HT
0x0a79c3824d870bf125d5ba1483ae762a819a3d9ff3178b232a7ea726767e4dfc119831282022-01-22 8:28:3724 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x67bb13debae731ad1506686023db944080f793d40 HT
0x0a79c3824d870bf125d5ba1483ae762a819a3d9ff3178b232a7ea726767e4dfc119831282022-01-22 8:28:3724 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x67bb13debae731ad1506686023db944080f793d40 HT
0x0a79c3824d870bf125d5ba1483ae762a819a3d9ff3178b232a7ea726767e4dfc119831282022-01-22 8:28:3724 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d0x3d1aee342a50e1dc6b8acb72cf48905288255fc40 HT
0x5ab502be5c563f63ded65e5b9e3575d4c1fee91672362e8cc5ad4ade9254b45c119831252022-01-22 8:28:2824 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x67bb13debae731ad1506686023db944080f793d40 HT
0x5ab502be5c563f63ded65e5b9e3575d4c1fee91672362e8cc5ad4ade9254b45c119831252022-01-22 8:28:2824 mins ago 0x68d936cb4723bdd38c488fd50514803f96789d2d 0x67bb13debae731ad1506686023db944080f793d40 HT
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0xD799f6Bd4a13E829FFeE087EA2602a13DFE64020

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 hecoinfo.com on 2021-08-12
*/

/**
 *Submitted for verification at polygonscan.com on 2021-06-12
*/

// 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 Gas Used Reward
Age Block Fee Address Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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