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How to transfer ownership of LightAccount

Not all smart account implementations support transferring the ownership (e.g. SimpleAccount). However, a number of the accounts in this guide and in Account Kit do, including our LightAccount! Let's see a few different ways we can transfer ownership of an Account (using LightAccount as an example).

Usage

LightAccount exposes the following method which allows the existing owner to transfer ownership to a new owner address:

function transferOwnership(address newOwner) public virtual onlyOwner

There a number of ways you can call this method using Account Kit.

1. Using transferOwnership client action

example.ts
import { smartAccountClient as lightAccountClient } from "./smartAccountClient";
 
// this will return the signer of the smart account you want to transfer ownerhip to
const newOwner = LocalAccountSigner.mnemonicToAccountSigner(NEW_OWNER_MNEMONIC);
const accountAddress = lightAccountClient.getAddress();
 

const hash = lightAccountClient.transferOwnership({
  newOwner,
  waitForTxn: true,
});
// after transaction is mined on the network,
// create a new light account client for the transferred Light Account
const transferredClient = await createLightAccountClient({
  transport: custom(smartAccountClient),
  chain: smartAccountClient.chain,
  signer: newOwner,
  accountAddress, // NOTE: you MUST specify the original smart account address to connect using the new owner/signer
  version: "v2.0.0", // NOTE: if the version of the light account is not v1.1.0, it must be specified here
});

Since @alchemy/aa-accounts exports a LightAccount ABI, the above approach makes it easy to transfer ownership. That said, you can also directly call sendUserOperation to execute the ownership transfer. As you will see below, however, it is a bit verbose:

2. Using sendUserOperation

example.ts
import { encodeFunctionData } from "viem";
import { smartAccountClient } from "./smartAccountClient";
 
// this will return the address of the smart account you want to transfer ownerhip of
const accountAddress = smartAccountClient.getAddress();
const newOwner = "0x..."; // the address of the new owner
 

const result = await smartAccountClient.sendUserOperation({
  to: accountAddress,
  data: smartAccountClient.encodeTransferOwnership(newOwner),
});
// wait for txn with UO to be mined
await smartAccountClient.waitForUserOperationTransaction(result);

See the LightAccount docs for more details about our `LightAccount implementation.