Multicontract Update

Front.sol

//SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.7;

interface Router {
    function get_implementatino_address() external returns (address);
}


contract Front {
    Router router;
    uint value;
    
    constructor(Router _router) {
        router = _router;
    }
    
    /// Use this function to call functions in the implementation
    function makeCall(bytes memory data) public payable returns (bytes memory)
    {
        address implementation = router.get_implementatino_address();
        (bool success, bytes memory rdata) = implementation.delegatecall(data);
        require(success);
        return rdata;
    }
}

Implementation.sol

//SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.7;

interface Router {
    function get_implementatino_address() external returns (address);
}


contract Implementation {
    /// Must have the same layout as Front
    Router router;
    uint value;
    
    // Doesn't need a constructor 
    
    function updateValue() public {
        value += 1;
    }
}

Router.sol

//SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.7;

contract Router {
    address implementation;
    
    constructor(address _implementation) {
        implementation = _implementation;
    }
    
    function get_implementatino_address() public view returns (address) {
        return implementation;
    }
   
    /// Call this function for upgrading the contracts using this router
    /// Make sure this function can only be called by owner.
    function set_implementation_address(address _implementation) public {
        implementation = _implementation;
    }
}