Can I interact with a smart-contract that's a variable inside another smart-contract?

Question

I want to interact with a third party contract.

I can interact with (third party) Smart Contract A.

Inside Smart Contract A's code is

import { contractb } from ".../ContractB.sol";

ContractB public contractb; 

some functions inside Contract A interact with contractb by using something like

contractb.function();

I would like to interact with a function that is available inside contractb. Can I do this, or would this only be possible if Contract A is calling the function in one of it's functions?

Answer 1

Yes, that's right!You can use another contract within a contract.

Solidity is influenced by the C++, Python and Javascript languages，A lot of syntax is similar.

The following code works correctly，You can use it as a reference

contract Test {

    ContractA public contractA = new ContractA();

    function test() public view returns (bool){
        return contractA.contractB().test();
    }

}

contract ContractA {
    ContractB  public contractB;

    constructor() public {
        contractB = new ContractB();
    }
}

contract ContractB {

    constructor() public {}

    function test() public view returns (bool){
        return true;
    }

}