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/**
 *Submitted for verification at Etherscan.io on 2025-01-09
*/

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;

/**
 * @title IProxy - Helper interface to access the singleton address of the Proxy on-chain.
 * @author Richard Meissner - @rmeissner
 */
interface IProxy {
    function masterCopy() external view returns (address);
}

/**
 * @title NXVProxy - Generic proxy contract allows to execute all transactions applying the code of a master contract.
 * @author Stefan George - <[email protected]>
 * @author Richard Meissner - <[email protected]>
 */
contract NXVProxy {
    // Singleton always needs to be first declared variable, to ensure that it is at the same location in the contracts to which calls are delegated.
    // To reduce deployment costs this variable is internal and needs to be retrieved via `getStorageAt`.
    address internal singleton;

    /**
     * @notice Constructor function sets address of singleton contract.
     * @param _singleton Singleton address.
     */
    constructor(address _singleton) {
        require(_singleton != address(0), "Invalid singleton address provided");
        singleton = _singleton;
    }

    /// @dev Fallback function forwards all transactions and returns all received return data.
    fallback() external payable {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let _singleton := and(sload(0), 0xffffffffffffffffffffffffffffffffffffffff)
            // 0xa619486e == keccak("masterCopy()"). The value is right padded to 32-bytes with 0s
            if eq(calldataload(0), 0xa619486e00000000000000000000000000000000000000000000000000000000) {
                mstore(0, _singleton)
                return(0, 0x20)
            }
            calldatacopy(0, 0, calldatasize())
            let success := delegatecall(gas(), _singleton, 0, calldatasize(), 0, 0)
            returndatacopy(0, 0, returndatasize())
            if eq(success, 0) {
                revert(0, returndatasize())
            }
            return(0, returndatasize())
        }
    }
}

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[{"inputs":[{"internalType":"address","name":"_singleton","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"stateMutability":"payable","type":"fallback"}]

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

0x608060405273ffffffffffffffffffffffffffffffffffffffff600054167fa619486e0000000000000000000000000000000000000000000000000000000060003503604f578060005260206000f35b3660008037600080366000845af43d6000803e60008103606e573d6000fd5b3d6000f3fea26469706673582212200c0f242a274d2ff90e8a8bc233f9cdf21750f526df4110b7acd85cf41935726864736f6c63430008110033

00000000000000000000000050aa328405c0277e44e6630458d1b6cc9b76d410

-----Decoded View---------------
Arg [0] : _singleton (address): 0x50aA328405C0277e44E6630458D1B6CC9b76d410

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000050aa328405c0277e44e6630458d1b6cc9b76d410

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ipfs://0c0f242a274d2ff90e8a8bc233f9cdf21750f526df4110b7acd85cf419357268