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•  contract UserProxy //@audit focus ... *
•    - function transfer(address punkContrac ...

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/**
 *Submitted for verification at Etherscan.io on 2020-10-01
*/

pragma solidity ^0.5.0;

contract UserProxy { //@audit focus on this

    address private _owner;

    /**
     * @dev Initializes the contract settings
     */
    constructor()
        public
    {
        _owner = msg.sender;
    }

    /**
     * @dev Transfers punk to the smart contract owner
     */
    function transfer(address punkContract, uint256 punkIndex)
        external
        returns (bool)
    {
        if (_owner != msg.sender) {
            return false;
        }

        (bool result,) = punkContract.call(abi.encodeWithSignature("transferPunk(address,uint256)", _owner, punkIndex));

        return result;
    }

}

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[{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"constant":false,"inputs":[{"internalType":"address","name":"punkContract","type":"address"},{"internalType":"uint256","name":"punkIndex","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"}]

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bzzr://2431eb3db44f6d4e7b3be276b8da5ceb848f136661ca00c86b8403d61ac6d1bf