I am not able to understand how to use IVotes contract address in GovernorVotes contract

Question

As IVotes is a interface and cannot be deployed.

    IVotes public immutable token;

    constructor(IVotes tokenAddress) {
        token = tokenAddress;
    }
....

Error: *** Deployment Failed ***

"IVotes" is an abstract contract or an interface and cannot be deployed.

Import abstractions into the '.sol' file that uses them instead of deploying them separately.
Contracts that inherit an abstraction must implement all its method signatures exactly.
A contract that only implements part of an inherited abstraction is also considered abstract.

I want to use IVotes address passing in GovernorVotes constructor. I tried bunch of methods but none works

score 1 · Answer 1 · answered Aug 20 '22 at 16:16

1

The Solidity snippet, that you shared, expects a contract on the tokenAddress to implement the IVotes interface.

But it needs to be a "full" contract with all function bodies - not just the function declarations.

answered Aug 20 '22 at 16:16

Petr Hejda

it require the deployed contract address as a parameter which i am not able to understand how to get it as it is a interface contract(cannot be deployed). – Yakshesh Gupta Aug 20 '22 at 18:38
@YaksheshGupta You need to either obtain the address of an existing contract (that implements the interface) or create the contract yourself (again a contract that implements the interface).... Please note that there is a difference between an interface (doesn't have the function bodies - only function names, input params and output params) and a contract (does have function bodies). A simple description is also that a contract implements an interface by creating the function bodies for the function names declared in the interface. – Petr Hejda Aug 20 '22 at 19:29
I made a contract that usses all the function of the interface and its working now, Thanks – Yakshesh Gupta Aug 21 '22 at 16:25

1 Answers1