Not using http transport for personal_sign method.

[pepoospina]

I'm using a wallet client with a programmed private key to test my app on a testnet.

I need to use Alchemy instead of a local testnet and, so, this is how I configure it:

  const account = mnemonicToAccount(mnemonic, { accountIndex: ix });

  const client = createWalletClient({
    account,
    chain,
    transport: http(`https://${ALCHEMY_SUBDOMAIN}.g.alchemy.com/v2/${ALCHEMY_KEY}`),
  });

  const signer = new WalletClientSigner(client, 'json-rpc');

I now want to sign a message with signer.signMessage() but it forwards the request to Alchemy and throws the error

Request body: {"method":"personal_sign","params":["0x5072657061726520616e6f6e796d6f7573206964656e74697479","0xFfEB3c7bE84527a44349aFD421dC5a1834DBAa1D"]}

Details: {"code":-32600,"message":"Unsupported method: personal_sign

I would like this method (personal_sign), to be handled by the connected account instead.

How would you achieve this? Should I build a custom transport?

[jxom]

What is WalletClientSigner? The signMessage Action in Viem should be able to sign a message locally without broadcasting over JSON-RPC.

[pepoospina]

Oh, sorry, I was confused. WalletClientSigner is actually an account abstraction wrapper, so need to check that. I'm forgetting what my own code is doing...

This is the wrapper btw: https://accountkit.alchemy.com/packages/aa-core/signers/wallet-client.html

[jxom]

Interesting. You could probably use signMessage from the account directly (account.signMessage({ message: 'blah' }))

[jxom]

https://viem.sh/docs/accounts/signMessage.html