Support for create2 in ethers.utils.getContractAddress ?

[julien51]

We are using ethers.utils.getContractAddress in order to determine the address of an upcoming contract (using the sender's address and its nonce).

As we are moving to using create2, this approach does not yield the correct address.
Is there any plan to support create2 for getContractAddress?

[ricmoo]

Oh yes! I meant to add this earlier.

I have the necessary function in another project and will add it to both v4 and v5 today.

Thanks for the reminder. :)

[ricmoo]

I've added utils.getCreate2Address. Let me know if you have any problems:

const addr = utils.getCreate2Address({
    from: fromAddress, // Probably the contract. address
    salt: someSalt,
    initCode: initCode
});

Or if you have the initCode hash instead:

const addr = utils.getCreate2Address({
    from: fromAddress,
    salt: someSalt,
    initCodeHash: initCodeHash
});

The v5 version will only support the latter option, I think, but I'd be curious which you use more often.

[ricmoo]

Closing this now, but please feel free to re-open (or open a new issue) if you have any problems.

Thanks! :)

[b4vtech]

Hi, I am trying the getCreate2Address function, but it is not giving me the addresses that are finally created.
I think it has to do because of the constructor arguments. Checking in the Solidity docs, the address is also calculated by the constructor arguments: https://docs.soliditylang.org/en/v0.8.0/control-structures.html#salted-contract-creations-create2

With the ethers function getCreate2Address we can not pass the arguments and I think that's why it doesn't coincide.
Is there anyway I can pass those arguments or do you know how to create the init code with constructor arguments, please?

Thanks a lot!

[ricmoo]

You have to pass in the initcode, which is the deployment bytecode concatenated with the ABI encoded arguments. You can use the defaultAbiCoder.encode(types, values) to compute this.

That should give you the address you are expecting.

Let me know if that works for you. :)