I have a factory contract that I need to be able to deploy with some ETH. I'm getting an error TypeError: Member "transfer" not found or not visible after argument-dependent lookup in address.

I tried instantiating the contract address as payable but not having any luck.

Where am I going wrong?

Factory contract

function createContract() public payable {
   NewContract myNewContract = new NewContract();
   address newContractAddress = address(newContract);

The following also doesn't work:

function createContract() public payable {
   NewContract myNewContract = new NewContract();
   address payable newContractAddress = address(newContract);

Constructed contract

constructor() public payable {
  • "The following also doesn't work" - with the exact same error?? – goodvibration Dec 16 '19 at 3:09
  • different error: Type address is not implicitly convertible to expected type address payable @goodvibration – Michael C Dec 16 '19 at 3:54
  • Well, then simply change address(newContract) to address payable(newContract). – goodvibration Dec 16 '19 at 4:05
  • 1
    @goodvibration That's not how you cast to address payable. The way to get an address payable is to cast it to an integer, then cast it to an address: address(uint160(newContract)) – Jesbus Dec 16 '19 at 8:09

You made your constructor payable, but that only means you can attach funds to the contract creation expression:

NewContract myNewContract = (new NewContract).value(msg.value)();

To make it possible to transfer ETH to a contract add a payable fallback function:

function () external payable

You can only use .transfer(..) on a value of type address payable. To convert an address to an address payable, cast to uint160 then back to address:

address payable b = address(uint160(a));

Attaching the ETH to the contract creation transaction is more efficient than creating with 0 ETH and then transferring the ETH.

I hope this helps!


The error means you are trying to use a function transfer() which does not apply to the type address.

It can only be used on an address payable.

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