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Contract

0x9e12BfBF6EF6460e697548Fac727c58F2Be27875
 

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Safe Transfer Fr...195916712024-04-05 19:38:5972 days ago1712345939IN
0x9e12BfBF...F2Be27875
0 ETH0.0013322419.0666065
Set Approval For...195819572024-04-04 10:58:2374 days ago1712228303IN
0x9e12BfBF...F2Be27875
0 ETH0.0009172117.96586271
Safe Transfer Fr...195809032024-04-04 7:26:3574 days ago1712215595IN
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0 ETH0.0014134920.21097769
Safe Transfer Fr...192940932024-02-24 1:14:35114 days ago1708737275IN
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0 ETH0.0016735322.39232582
Set Approval For...188047202023-12-17 9:00:35183 days ago1702803635IN
0x9e12BfBF...F2Be27875
0 ETH0.0009403732.26976455
Set Approval For...181450452023-09-16 0:05:11275 days ago1694822711IN
0x9e12BfBF...F2Be27875
0 ETH0.00024668.43799089
Set Approval For...181450442023-09-16 0:04:59275 days ago1694822699IN
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0 ETH0.000250148.58385825
Set Approval For...181450442023-09-16 0:04:59275 days ago1694822699IN
0x9e12BfBF...F2Be27875
0 ETH0.000250348.58385825
Safe Transfer Fr...178633402023-08-07 13:25:35315 days ago1691414735IN
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0 ETH0.0018400334.38087412
Safe Transfer Fr...178240052023-08-02 1:22:59320 days ago1690939379IN
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0 ETH0.0014822520.98942813
Set Approval For...177226342023-07-18 20:57:59334 days ago1689713879IN
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0 ETH0.0038710675.82440365
Set Approval For...175366002023-06-22 17:19:59360 days ago1687454399IN
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0 ETH0.0008637716.91920905
Safe Transfer Fr...173980812023-06-03 5:28:59380 days ago1685770139IN
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0 ETH0.0015707122.19934507
Set Approval For...173946092023-06-02 17:45:35380 days ago1685727935IN
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0 ETH0.0014569428.52457668
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0 ETH0.0040525957.39655211
Set Approval For...171469542023-04-28 20:18:23415 days ago1682713103IN
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0 ETH0.001946638.12910087
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0 ETH0.0011188338.39386216
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0 ETH0.0032100362.87648346
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0 ETH0.0026624935.30276905
Safe Transfer Fr...171094582023-04-23 13:58:23420 days ago1682258303IN
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0 ETH0.0025509136.12215036
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0 ETH0.0011365322.26177767
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0x9e12BfBF...F2Be27875
0 ETH0.0012539124.56103481
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0x9e12BfBF...F2Be27875
0 ETH0.0017653834.57941659
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0x9e12BfBF...F2Be27875
0 ETH0.0012817225.10578013
Set Approval For...166575922023-02-18 19:28:47484 days ago1676748527IN
0x9e12BfBF...F2Be27875
0 ETH0.0010570420.7049389
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Contract Source Code Verified (Exact Match)

Contract Name:
BillyDEdition

Compiler Version
v0.8.7+commit.e28d00a7

Optimization Enabled:
Yes with 300 runs

Other Settings:
default evmVersion
File 1 of 5 : BillyDEdition.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @title: Billy Dinh Edition
/// @author: manifold.xyz

import "./ERC721Creator.sol";

////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                                            //
//                                                                                                            //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMO=?$8NDZI?~:OMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM8~ONMMMMMMMMMMMMNDI~MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM=?ONMMMMMMMMMMMMMMMD?~:MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM~7NNND8OO8888O8O8OZ?~==:=MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM:~==II777$777I77$I+~+7$8?IZMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM7=~~=++++?77I77II+?$OD8=$D7MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNMNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMOO$+~=~=++IIII++?I7Z$=?NMMO8MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMN8MNND7+~=~==+++????~7MMMMMN?==8MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMZDMMMMMNOI=~=++++++7NMMMMMMM8~==++OMMMMMMMMMMMMMMMMMMMMMMMMMMMNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM=+DMMMMMMMMMZ=====INMMMMMMMMMD+~~==++7MMMMMMMMMMMMMMMMMMMMMMMMMNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM~=~?NMMMMMMMMMMMMO7NMMMMMMMMMMMMO:~~=====MMMMMMMMMMMMMMMMMMMMMMMMNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM=~~~:7NMMMMMMMMMMMMMMMMMMMMMMMMMMMD=:~~~~===MMMMMMMMMMMMMMMMMMMMMMMNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMD=~~~~~ZMMMMMMMMMMMMMMMMMMMMMMMMMMMMMZ=~~~===+=MMMMMMMMMMMMMMMMMMMMMMNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMN===~=~=OMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNI===+====MMMMMMMMMMMMMMNMMMMNNMNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMI+++====DMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM$?++==+?+MMMMMMMMMMMMMMMMMNMNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMM++++++?IDMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMO$II++?++MMMMMMMMMMMMMMMMMMMNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMM?++++?I$8MMMMMMMMMMMMMMMMMMMMMMMMMMMMMN8Z$7III?8MMMMMMMMMMMMMMMNNNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMZ=+??I7$8MMMMMMMMMMMMMMMMMMMMMMMMMMMMMNDOZ$777IMMMMMMMMMMMMMMMMMNMNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMM=+?III$ODMMMMMMMMMMMMMMMMMMMMMMMMMMMMNDOZZ$7IMMMMMMMMMMMMMMMMMMNMNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMM++?I7$ODNMMMMMMMMMMMMMMMMMMMMMMMMMMMND8OZ$7MMMMMMMMMMMMMMMMMMMMNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM?I77$ODNMMMMMMMMMMMMMMMMMMMMMMMMMMNND8OOOMMMMMMMMMMMMMMMMMMNMNNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNI7$Z8DNMMMMMMMMMMMMMMMMMMMMMMMMMDDD8OMMMMMMMMMMMMMMMMMMMNMMNNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM$ZODNNMMMMMMMMMMMMMMMMMMMMMMMNNDNMMMMMMMMMMMMMMMMMMMMMMMMNNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMN8DNMMMMMMMMMMMMMMMMMMMMMMNMMMMMMMMMMMMMMMMMMMMMMMMMMNMNNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM7DNNMMMMMMMMMMMMMNMMMMMMMMMMMMMMMMMMMMMMMMMMMMNMNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM=+=$8O7$MNNMMMMMMMMMNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM+~?88NI=NMNO$DMMMMMMNMIZMMMMMMMMMMMMMMMMMMMMMMMMMMMNNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMI~?O$~?ZNNN$MMMZMMMMMNM$==7MMMMMMMMMMMMMMMMMMMMMMMMMMMNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM,~==,=ID88D::MDDMMDMMMMMM~,+I+MMMMMMMMMMMMMMMMMMMMMMMMMMNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMN8~=I+$O~~?ZNMD$NMMNMMMMMN,,7$?=MMMMMMMMMMMMMMMMMMMMMMMMMNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMN?M:~+I8MMMMMMNZDMMMMMMM?+ZZOZI+~MMMMMMMMMMMMMMMMMMMMMMMMNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMO8NOMMMMMMMMMMMNNMMMMMNNDO88OOZI??=~?NMMMMMMMMMMMMMMMMMMNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM8~~~+$NNMMMMMMMMMMNMMMMMMNNNNNDD8OO$7Z====~~~OMMMMMMMMMMMMMMNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMM7~=====+?8DNMMMMMMMNMMMMMMMMMND8NNNND8OZ$O=+=~~====~~=?MMMMMMMMMNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMMMM+~=======++=ZDDMMMMMMMM$MMMMMMMMNOI?NNNNND8ZO$+++??++++=II?+8MMMMMMMNNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMMMM=++===++===+?=8DNNMMMMMMMMMMMMMMMNO$??NMNNNNDO87?I$OZ??I?I?I$7I$MMMMMMMNNNNNNN    //
//    MMMMMMMMMMMMMMMMMMMM?$N?7N+=++???I?78DNNNNNMMMMMMMMMMMMMM?+MMMMMND8ON77OM8?I7?I$O$OZ??IMMMMMMNNNNNNN    //
//    MMMMMMMMMMMMMMNM8MM?I8?MODI+++???I77ONDNNNNMMMNDMMMMMMMMMM?MMMMNO8OZO$OMD7I7IN8ID$?D8ZI8MMMMMNNNNNNN    //
//    MMMMMMMMMMMMMMNM8M7$M+ON$88???I?$I$~+NDNNNMMMO8DNMMMMMM?$NMMMMNMN8OZZONMO$$$ZD$7$MD$7877NMMMMMNNNNNN    //
//    MMMMMMMMDMMNDMNMDD7$ZN8I8DMI7II$ZZ++IMNDDNN8++~?NMMDMMII=?MNDNDNDOZ8ZODDZZOZN$OMMZIMO$ZDDMM8MMMNNNNN    //
//    MMMMMMMMMNDNMMNMMZDD$$8MDOM88O$O8O??ONNNNNMMO?DNDMMMNDI$7DDNNNDDD88ODMMND8DDNNMD$MMZNMOONMNMMMMMMNNN    //
//    MMMMMMMMMNNMMMMMNNMNDDZDNMMND88ODIIOO8NMMDMNMNDMNNMMMN$ZZDNMMNDND8DDMMMNDNNMMMNNMNMMDMNNNNMMMMMMMMNN    //
//    MMMMMMMMMMMMMMMMNNNNMNNNDNMNMNDDNZ8DDNNDMNMMMMMMMMMMMDOZNMMMMNNNNNNMMNMNNNMNMNMMMMMMNMMMMNMMMMMMMMMM    //
//    MMMMMMMI......,MNM...NM...MMMNNN...8NMMN ..MMM...,MMMD88..... =NMN...MN+...MMM...MM...NMM...MMMMMMMM    //
//    MMMMMMM7. ......MM...NM...MMMMMM...8MMMM:...MM...MMMMNNN ......=MM...MM+ ..MMM...MM...NMM...MMMMMMMM    //
//    MMMMMMM7..+MM...MM...MM...MMMMMM...8MMMMM...M...MMMMMNMN .,M....MM...MM+ ...MM...MM...MMM...MMMMMMMM    //
//    MMMMMMMI..+MM...MM...MM...MMMMMM...8MMMMMD .. . MMMMMMMN .,MM...MM...MM+....ZM...MM...MMM...MMMMMMMM    //
//    MMMMMMMI.......MMM...MM...MMMMMM...8MMMMMM.....MMMMMMMMN .,MM=..8M...MM+ . ..M...MM.........MMMMMMMM    //
//    MMMMMMM7.......,MM...MM...MMMMMM...8MMMMMMM...,MMMMMMMMN .,MM=..8M...MM+ .M . ...MM.........MMMMMMMM    //
//    MMMMMMM7..+MM...MM...MM...MMMMMM...8MMMMMMM...MMMMMMMMMN .,MM...8M...MM+ .M. ....MM...MMM...MMMMMMMM    //
//    MMMMMMM7. +MM...MM...MM...MMMMMM...8MMMMMMM...MMMMMMMMMN .,MM...MM...MM+ .MM.....MM...MMM...MMMMMMMM    //
//    MMMMMMMI........MM...MM........M........MMM...MMMMMMMMMN . .....MM...MM+ .MMD....MM...MMM...MMMMMMMM    //
//    MMMMMMMI........MM...MM........M........MMM...MMMMMMMMMN ......MMM...MM+ .MMM....MM ..MMM...MMMMMMMM    //
//    MMMMMMMZ,,,,,OMMMM:,,MM:,,,,,,,M~,,,,,,,MMM:,,MMMMMMMMMM,,,,:MMMMM:,,MMI,,NMMM:,,MM,,,MMM:,,MMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//    MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM    //
//                                                                                                            //
//                                                                                                            //
//                                                                                                            //
//                                                                                                            //
//                                                                                                            //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////


contract BillyDEdition is ERC721Creator {
    constructor() ERC721Creator("Billy Dinh Edition", "BillyDEdition") {}
}

File 2 of 5 : ERC721Creator.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";

contract ERC721Creator is Proxy {
    
    constructor(string memory name, string memory symbol) {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a;
        Address.functionDelegateCall(
            0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a,
            abi.encodeWithSignature("initialize(string,string)", name, symbol)
        );
    }
        
    /**
     * @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 Returns the current implementation address.
     */
     function implementation() public view returns (address) {
        return _implementation();
    }

    function _implementation() internal override view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }    

}

File 3 of 5 : Proxy.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)

pragma solidity ^0.8.0;

/**
 * @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 internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        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 overridden 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 internal 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 overridden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}

File 4 of 5 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @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
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev 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");

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

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

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

File 5 of 5 : StorageSlot.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)

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
        }
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 300
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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Deployed Bytecode

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.