如何将struct从合约A传递到合约B？最佳实践

Question

我发现这样，当创建一个具有结构的通用接口时，然后合约A和B继承该具有结构的接口。

但我想知道是否还有其他方法？

是否存在可以更新具有结构的合约的情况？

pragma experimental ABIEncoderV2;
pragma solidity ^0.6.0;
 
interface params {
     struct  structTest {
        uint256 data;
    }
}

contract contractA is params{
    function testCall(structTest calldata _structParams) public pure returns (uint256){
        return _structParams.data;
    }
}

contract contractB is params{
    contractA aContractInstance;
    
    constructor (address _a) public {
        aContractInstance = contractA(_a);
    }
    
    function test(structTest calldata _structParams) public view returns(uint256){
        // call contract A from B and pass structure
        return aContractInstance.testCall(_structParams);
    }
}

Answer 1

interface IContractA {

    struct User {
        address addr;
    }
    function getUser(aaddress addr) external view returns (User memory user);
}

contract contractB{

    function getUserFromContractA(address addr) public view
        returns (IContractA.User memory user)
    {
      ContractA = IContractA(addrContractA);
      user = ContractA.getUser(addr);
    }
}