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

/// @title IProxy - Helper interface to access masterCopy of the Proxy on-chain
/// @author Richard Meissner - <richard@gnosis.io>
interface IProxy {
    function masterCopy() external view returns (address);
}

/// @title GnosisSafeProxy - Generic proxy contract allows to execute all transactions applying the code of a master contract.
/// @author Stefan George - <stefan@gnosis.io>
/// @author Richard Meissner - <richard@gnosis.io>
contract GnosisSafeProxy {
    // 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;

    /// @dev 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())
        }
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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

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

0x6080604052600080546001600160a01b0316632cf35bc960e11b823501602757808252602082f35b3682833781823684845af490503d82833e806040573d82fd5b503d81f3fea2646970667358221220a34202347e8dc73d4f5a3ac0cc4213ed5de5f6c45fd0fa4d18903f12161dc13764736f6c63430008110033