Contract 0xFf8Cf5ABF583D0979C0B9c35d62dd1fD52cce7C7 3

 

Contract Overview

Balance:
0 ETH

EtherValue:
$0.00

Token:
Txn Hash Method
Block
From
To
Value
0x23af7eb14ec0647c5af8ad3ae16c2b4f9dbe7487267f22d6cbc6465975f9db8cCreate New Marke...1168238362024-02-29 22:40:493 hrs 18 mins ago0x6568add3737be8ccc3f772c08ff9626b0ee82a1f IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c71 wei0.0013266765580.0731208
0xcc19579f4dfafae8cc8d9a15bd31c99123c37a453b94a7fca8e4680d00080aa2Create New Marke...1168236652024-02-29 22:35:073 hrs 23 mins ago0x6568add3737be8ccc3f772c08ff9626b0ee82a1f IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c71 wei0.0011594764320.0870166
0x1c806f179e9a2cfd174e3816feca8aab61e2efffdfb28ec436302ef0983d023eCreate New Marke...1167209842024-02-27 13:32:252 days 12 hrs ago0xf50d47c2c552eaae9b4389ffe4cc74231fd22eb1 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c71 wei0.000919562430.024930683
0x29621a48c47e171fc0753246140cf7a9357883b032835fa39c4db9ce44ae9234Resolve Market M...1166092982024-02-24 23:29:335 days 2 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70 ETH0.0002728841440.00237559
0x8775ccc7994200c4d0ca4b970c4df2eb48a66b2a73d992a1225f7c6de01d00caCreate New Marke...1166087802024-02-24 23:12:175 days 2 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c71 wei0.0003884376350.003323168
0x79d2990d570a403e896521d8ed1feb85522e96e0f99c68173d784c2706d59109Create New Marke...1166086012024-02-24 23:06:195 days 2 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c71 wei0.0004060328440.003097671
0x73eada206407e766fe746383122fd1fb13c195b94ebdef29c8aca1e8d146f43eCreate New Marke...1166085682024-02-24 23:05:135 days 2 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c71 wei0.0003915621420.003234921
0x877298b76285b9375968f0bdc09685fbabd194bbd844f9b88bb4a196d2967d93Create New Marke...1166085482024-02-24 23:04:335 days 2 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c71 wei0.0003962960170.003279365
0xb5d60d51107a3ba24a39507c805a52ee41257241fb6d52f69dba96158be9b6eaResolve Market1166084112024-02-24 22:59:595 days 2 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c72 wei0.0007058380770.002464723
0xa487b283422d3f15e4010d2be7b53980a239ce1752f925554a57aaf13a132dafCreate New Marke...1166083722024-02-24 22:58:415 days 3 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c71 wei0.0003823668040.003242693
0xc8d4cab29d286fe5c045eea15d136f0b0a4c4d05cf6b100dc3a558c365a04028Resolve Market1166081942024-02-24 22:52:455 days 3 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c72 wei0.000685878380.003206096
0x8626b86608413ce2eab2018b08fa39737fdffb94cf09379a303787a4f13840e8Create New Marke...1166081002024-02-24 22:49:375 days 3 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.003411987449238 ETH0.000364782420.003293398
0x6c477c662d33883e9cc80ab3ad10bf8d766d6a7e7c7c7bf8e9eb5e7a94af883bCreate New Marke...1166079532024-02-24 22:44:435 days 3 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.001723225984463 ETH0.0003818683020.002802877
0x34f2a4e0de01d48ab1689ea3a0dcbdaaf03e638d65a8f198360cb2e974ee77bbCreate New Marke...1166079192024-02-24 22:43:355 days 3 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.001720601219522 ETH0.0003853922620.002795701
0xfaa44604e670b617c35a4565def1340130f2ad167898eb5150a6dcd31956e3d8Create New Marke...1166009552024-02-24 18:51:275 days 7 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.001724314575345 ETH0.000569962610.006413947
0x3f0ce3f1ca555766d3af891f74796b9ba062be43848754c4fac734270345c4fdCreate New Marke...1166007112024-02-24 18:43:195 days 7 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.00172167101743 ETH0.0005602869030.002991351
0x82fb2e0a498a07b180bc56b72e62fda769c86385f0872e0df3996bfe50e93988Create New Marke...1166004152024-02-24 18:33:275 days 7 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.001719079895856 ETH0.000500741920.003083775
0xb487a3979eaf6094d0895da4d60e48b4dcc19e8715064748daf042abd937495cCreate New Marke...1165998242024-02-24 18:13:455 days 7 hrs ago0x2aad6db9f21c338b7b292b9b64157530029c1643 IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.001716359307099 ETH0.0006351861690.002370765
0x774d429127656657a6b11bac61ad2fa591e7a82ec27e48b009434d66a4444a75Create New Marke...1165922792024-02-24 14:02:155 days 11 hrs ago0xf73902ef5075107da6c0f21982bd6b82d182beda IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.001736949785394 ETH0.0005315089110.003864467
0x7ba7ef71bd492d44c54ff441d7677c571982bab79abf2ae8ef219d8993de77caCreate New Marke...1165920722024-02-24 13:55:215 days 12 hrs ago0xf73902ef5075107da6c0f21982bd6b82d182beda IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.001736949785394 ETH0.0004057712370.003380591
0x135cd086f25e9817518f060c22aaecfb5ae57fe88b5c27eecb493da33ce1fadfCreate New Marke...1165920602024-02-24 13:54:575 days 12 hrs ago0xf73902ef5075107da6c0f21982bd6b82d182beda IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.001736949785394 ETH0.0004084786270.003390497
0x5b54cefaaa6377e3e4e6ae4c24ef29be8ed265eec804280b27942b59a0ef0f38Resolve Market W...1165916162024-02-24 13:40:095 days 12 hrs ago0xf73902ef5075107da6c0f21982bd6b82d182beda IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c72 wei0.0007438571110.003233419
0x40e18dcebab1aa4c504d673c7ca6c17e854ba7038cfa0b945b2a3aae784ff0e7Create New Marke...1165914342024-02-24 13:34:055 days 12 hrs ago0xf73902ef5075107da6c0f21982bd6b82d182beda IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.003445538534294 ETH0.0004394074290.002744753
0xba4c3f85a0587eae1a1102e3c0a8cdd8246ddcbf3812565f1f4b09d072e14c4dCreate New Marke...1165668682024-02-23 23:55:136 days 2 hrs ago0xf73902ef5075107da6c0f21982bd6b82d182beda IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.001758862624241 ETH0.0004137499930.003702584
0xc01bf67b3ee65d303387959a6b8ff1ec000780dc7d9fa28e27c7429496c9dcdbCreate New Marke...1165663092024-02-23 23:36:356 days 2 hrs ago0xf73902ef5075107da6c0f21982bd6b82d182beda IN  0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70.001761773961291 ETH0.0004272559070.003138037
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x23af7eb14ec0647c5af8ad3ae16c2b4f9dbe7487267f22d6cbc6465975f9db8c1168238362024-02-29 22:40:493 hrs 18 mins ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0xcc19579f4dfafae8cc8d9a15bd31c99123c37a453b94a7fca8e4680d00080aa21168236652024-02-29 22:35:073 hrs 23 mins ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0x1c806f179e9a2cfd174e3816feca8aab61e2efffdfb28ec436302ef0983d023e1167209842024-02-27 13:32:252 days 12 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c7  Contract Creation0 ETH
0x1c806f179e9a2cfd174e3816feca8aab61e2efffdfb28ec436302ef0983d023e1167209842024-02-27 13:32:252 days 12 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0x8775ccc7994200c4d0ca4b970c4df2eb48a66b2a73d992a1225f7c6de01d00ca1166087802024-02-24 23:12:175 days 2 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c7  Contract Creation0 ETH
0x8775ccc7994200c4d0ca4b970c4df2eb48a66b2a73d992a1225f7c6de01d00ca1166087802024-02-24 23:12:175 days 2 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0x79d2990d570a403e896521d8ed1feb85522e96e0f99c68173d784c2706d591091166086012024-02-24 23:06:195 days 2 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c7  Contract Creation0 ETH
0x79d2990d570a403e896521d8ed1feb85522e96e0f99c68173d784c2706d591091166086012024-02-24 23:06:195 days 2 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0x73eada206407e766fe746383122fd1fb13c195b94ebdef29c8aca1e8d146f43e1166085682024-02-24 23:05:135 days 2 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c7  Contract Creation0 ETH
0x73eada206407e766fe746383122fd1fb13c195b94ebdef29c8aca1e8d146f43e1166085682024-02-24 23:05:135 days 2 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0x877298b76285b9375968f0bdc09685fbabd194bbd844f9b88bb4a196d2967d931166085482024-02-24 23:04:335 days 2 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0xb5d60d51107a3ba24a39507c805a52ee41257241fb6d52f69dba96158be9b6ea1166084112024-02-24 22:59:595 days 2 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0xb5d60d51107a3ba24a39507c805a52ee41257241fb6d52f69dba96158be9b6ea1166084112024-02-24 22:59:595 days 2 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0xa487b283422d3f15e4010d2be7b53980a239ce1752f925554a57aaf13a132daf1166083722024-02-24 22:58:415 days 3 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c7  Contract Creation0 ETH
0xa487b283422d3f15e4010d2be7b53980a239ce1752f925554a57aaf13a132daf1166083722024-02-24 22:58:415 days 3 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0xc8d4cab29d286fe5c045eea15d136f0b0a4c4d05cf6b100dc3a558c365a040281166081942024-02-24 22:52:455 days 3 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0xc8d4cab29d286fe5c045eea15d136f0b0a4c4d05cf6b100dc3a558c365a040281166081942024-02-24 22:52:455 days 3 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0x8626b86608413ce2eab2018b08fa39737fdffb94cf09379a303787a4f13840e81166081002024-02-24 22:49:375 days 3 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c7  Contract Creation0 ETH
0x8626b86608413ce2eab2018b08fa39737fdffb94cf09379a303787a4f13840e81166081002024-02-24 22:49:375 days 3 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0x8626b86608413ce2eab2018b08fa39737fdffb94cf09379a303787a4f13840e81166081002024-02-24 22:49:375 days 3 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c7 0x6f5a76423396bf39f64f8c51c0b3deb24990b1160.003411987449238325 ETH
0x6c477c662d33883e9cc80ab3ad10bf8d766d6a7e7c7c7bf8e9eb5e7a94af883b1166079532024-02-24 22:44:435 days 3 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c7  Contract Creation0 ETH
0x6c477c662d33883e9cc80ab3ad10bf8d766d6a7e7c7c7bf8e9eb5e7a94af883b1166079532024-02-24 22:44:435 days 3 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
0x6c477c662d33883e9cc80ab3ad10bf8d766d6a7e7c7c7bf8e9eb5e7a94af883b1166079532024-02-24 22:44:435 days 3 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c7 0x6f5a76423396bf39f64f8c51c0b3deb24990b1160.0017232259844638 ETH
0x34f2a4e0de01d48ab1689ea3a0dcbdaaf03e638d65a8f198360cb2e974ee77bb1166079192024-02-24 22:43:355 days 3 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c7  Contract Creation0 ETH
0x34f2a4e0de01d48ab1689ea3a0dcbdaaf03e638d65a8f198360cb2e974ee77bb1166079192024-02-24 22:43:355 days 3 hrs ago 0xff8cf5abf583d0979c0b9c35d62dd1fd52cce7c70xff1a0f4744e8582df1ae09d5611b887b6a12925c1 wei
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0xf18D727C034f47AE2C0FE221C1cf4A15f0557b5F
The constructor portion of the code might be different and could alter the actual behaviour of the contract

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"}]

Deployed Bytecode

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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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