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Outline

• interface IERC20
•    - function transfer(address to, uint256 ...
•    - function transferFrom(address from, a ...
•  contract VirtualVersionsErc20Upgra ... *
•    - function version()
•    - function withdraw(address _token, add ...
•    - function upgrade(address _recipient, ...

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/**
 *Submitted for verification at Etherscan.io on 2024-03-13
*/

// SPDX-License-Identifier: MIT

pragma solidity =0.8.9;

interface IERC20 {
    function transfer(address to, uint256 amount) external returns (bool);
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

contract VirtualVersionsErc20Upgrader {
    address public constant BLACK_HOLE_ADDRESS = 0x000000000000000000000000000000000000dEaD;

    address public admin_;

    address public oldToken_;
    address public newToken_;

    function version() external pure returns (string memory) { return "VirtualVersionsErc20Upgrader v1"; }

    constructor(address _admin, address _oldToken, address _newToken) {
        require(_admin != address(0), "TA-5: zero admin address");
        admin_ = _admin;

        require(_oldToken != address(0) && _newToken != address(0), "TA-1: zero token address");
        oldToken_ = _oldToken;
        newToken_ = _newToken;
    }

    modifier onlyAdmin() {
        require(msg.sender == admin_, "TA-4: auth failed");
        _;
    }

    function withdraw(address _token, address _recipient, uint256 _amount) external onlyAdmin {
        require(IERC20(_token).transfer(_recipient, _amount), "TA-6: transfer failed");
    }

    function upgrade(address _recipient, uint256 _amount) external {
        require(_amount != 0, "TA-2: zero token amount");
        require(_recipient != address(0), "TA-3: zero recipient address");

        require(IERC20(oldToken_).transferFrom(msg.sender, BLACK_HOLE_ADDRESS, _amount), "TA-7: burn failed");
        require(IERC20(newToken_).transfer(_recipient, _amount), "TA-8: transfer failed");
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_admin","type":"address"},{"internalType":"address","name":"_oldToken","type":"address"},{"internalType":"address","name":"_newToken","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"BLACK_HOLE_ADDRESS","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"admin_","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"newToken_","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"oldToken_","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"upgrade","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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0000000000000000000000005f9b6c6510bf3c3f2fdfbcb526f5458a08f3fccf0000000000000000000000005c39ef4bda89a9d7edb18a16e53c97d5d32245f60000000000000000000000001f7e7a030aef0a0f600de1350c23d30b73fc7270

-----Decoded View---------------
Arg [0] : _admin (address): 0x5f9B6C6510BF3c3F2fDFBcB526F5458a08f3fccf
Arg [1] : _oldToken (address): 0x5c39ef4bda89a9D7EDB18A16E53c97D5D32245F6
Arg [2] : _newToken (address): 0x1f7e7a030aEF0A0f600dE1350c23D30B73fC7270

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000005f9b6c6510bf3c3f2fdfbcb526f5458a08f3fccf
Arg [1] : 0000000000000000000000005c39ef4bda89a9d7edb18a16e53c97d5d32245f6
Arg [2] : 0000000000000000000000001f7e7a030aef0a0f600de1350c23d30b73fc7270

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ipfs://75c8f356c70b78ec9c3e733eb486357d9a97b6d5a11d6a5a9886b000b1215d96