Solidity：如何获取另一个合约部署的合约地址

Question

我是 Solidity 的新手，正在使用 Factory 模式从另一个合约部署合约。我试图获取已部署合约的合约地址，但我遇到了错误。

我已经在this question 中尝试了解决方案，但出现以下错误：Return argument type struct StorageFactory.ContractData storage ref is not implicitly convertible to expected type (type of first return variable) address.

这是我的代码：

contract StorageFactory {

  struct ContractData {
    address contractAddress; // I want to save the deployed contract address in a mapping that includes this struct
    bool exists;
  }

  // mapping from address of user who deployed new Storage contract => ContractData struct (which includes the contract address)
  mapping(address => ContractData) public userAddressToStruct;

  function createStorageContract(address _userAddress) public {

    // require that the user has not previously deployed a storage contract
    require(!userAddressToStruct[_userAddress].exists, "Account already exists");
    
    // TRYING TO GET THE ADDRESS OF THE NEWLY CREATED CONTRACT HERE, BUT GETTING AN ERROR
    address contractAddress = address(new StorageContract(_userAddress));

    // trying to save the contractAddress here but unable to isolate the contract address
    userAddressToStruct[_userAddress].contractAddress = contractAddress;
    userAddressToStruct[_userAddress].exists = true;
  }
}


// arbitrary StorageContract being deployed
contract StorageContract {
  address immutable deployedBy;

  constructor(address _deployedBy) {
    deployedBy = _deployedBy;
  }
}

我怎样才能得到这个合约地址，以便我可以将它存储在ContractData结构中？谢谢。

Answer 1

您可以使用以下代码获取已部署合约的地址：

address contractAddress;
(contractAddress,) = new StorageContract(_userAddress);
userAddressToStruct[_userAddress].contractAddress = contractAddress;