Search code examples
blockchainethereumsoliditysmartcontractschainlink

How to connect my smart contract with another deployed smart contract?

Assalamualaikum,

I am new to blockchain. So I was thinking of deploying a smart contract as rest api, and use it in my another smart contract. Is it possible? I know oracle helps to fetch data but can it help interacting two deployed contracts? Thank in advance.

Solution

  • You can define an interface of the target contract in the source contract. Example:

    TargetContract, deployed on the 0x123 address:

    pragma solidity ^0.8;

contract TargetContract {
    function foo() external pure returns (bool) {
        return true;
    }
}

    SourceContract, pointing to the 0x123 TargetContract

    pragma solidity ^0.8;

interface ITargetContract {
    function foo() external returns (bool);
}

contract SourceContract {
    function baz() external {
        ITargetContract targetContract = ITargetContract(address(0x123));
        bool returnedValue = targetContract.foo();
    }
}