Signing Messages with signMessage/signMessageWith6492 SDK function on Ethereum Chain results in error

[HatimPatwa]

Issue Description

When calling signMessage or signMessageWith6492 sdk methods exposed by creating modular account alchemy client
throws back error specifically on Ethereum Network, rest networks work fine and return signed message.

Eg. raw message passed : 0x4d7920656d61696c206973206a6f686e40646f652e636f6d202d2031373234393332363931323430

Error

Redacted API keys for sharing here

URL: https://eth-mainnet.g.alchemy.com/v2/<Alchemy Key>
Request body: {"method":"eth_call","params":[{"data":"0x84b0196e","from":"0xB20Bfc9680D87F18ECd52eD76B3ddCb3b8D08d0b"},"latest"]}
 
Raw Call Arguments:
  from:  0xB20Bfc9680D87F18ECd52eD76B3ddCb3b8D08d0b
  data:  0x84b0196e
 
Contract Call:
  function:  eip712Domain()

Docs: https://viem.sh/docs/contract/readContract
Details: Missing or invalid parameters.
Double check you have provided the correct parameters.

URL: https://eth-mainnet.g.alchemy.com/v2/<Alchemy Key>
Request body: {"method":"eth_call","params":[{"data":"0x84b0196e","from":"0xB20Bfc9680D87F18ECd52eD76B3ddCb3b8D08d0b"},"latest"]}

Details: Missing or invalid parameters.
Double check you have provided the correct parameters.

URL: https://eth-mainnet.g.alchemy.com/v2/<Alchemy Key>
Request body: {"method":"eth_call","params":[{"data":"0x84b0196e","from":"0xB20Bfc9680D87F18ECd52eD76B3ddCb3b8D08d0b"},"latest"]}

Details: stack underflow (0 <=> 5)
Version: viem@2.9.9
Version: viem@2.9.9
Version: viem@2.9.9

Code snippet

//dynamic selecting network based on request
const network = EIP155_MAINNET_CHAINS[body.chainId];

//Our modular client
 const smartAccountClient = await createModularAccountAlchemyClient({
    apiKey: network.api_key,
    chain: network.chain,
    signer: signer,
  });

//just logging for track
  logger.log('info', `-------smart address ${smartAccountClient.account.address}------------`)

  let signedMessage: Hex; //type safety
  try {
//function to sign 
    signedMessage = await smartAccountClient.signMessageWith6492({
      account: smartAccountClient.account,
      message: {
        raw: transactionData.message, //the message in Hex
      }
    });

//example message passed above
//0x4d7920656d61696c206973206a6f686e40646f652e636f6d202d2031373234393332363931323430

//just for verification on our end
    const verifyMsg2 = await smartAccountClient.verifyMessage({
      address: smartAccountClient.account.address,
      message: {
        raw: transactionData.message,
      },
      signature: signedMessage,
    });

    logger.log('info', `-------signed message 2------------${verifyMsg2}`)

  } catch (error) {
    console.log('error', error)
    logger.log('error', `-------sign message failed------------ \n ${(error)}`)
    throw new ApiError(400, 'Transaction failed, please try again later')
  }

  return signedMessage

SDK versions

"@alchemy/aa-accounts": "^3.6.1",
"@alchemy/aa-alchemy": "^3.7.3",
"@alchemy/aa-core": "^3.6.1",
"alchemy-sdk": "^3.2.0",
   

[moldy530]

ah, I think there might be 1 of 2 (or 2 of 2) things happening here. Can you try to verify the message with a client that's NOT the smartAccountClient? you can use createPublicClient for example to verify messages. Due to a bug in viem verifying messages with the smartAccountClient that generated the message, will result in failure.

The second issue, might be based on how we generate the signature, but I want to eliminate the first possibility

[HatimPatwa]

Hi @moldy530 , thanks for the response.

To eliminate the first possibility, i have to generate a signature first right?

Thats what i am not able to do, The error occurs during the function call of signMessage
at below code snippet:

//function to sign 
    signedMessage = await smartAccountClient.signMessageWith6492({
      account: smartAccountClient.account,
      message: {
        raw: transactionData.message, //the message in Hex
      }
    });

Hope this helps to narrow down the issue!

[moldy530]

if the client already has an account on it, then you shouldn't need to have this line: account: smartAccountClient.account

Also if possible, can you upgrade to the latest versions of the SDK? we're on v4 now, but looking at your v4 versions we had a couple bug fixes post the one's you're on. Think we got as far as 3.18.1 in v3, but I can't remember exactly

the v4 migration guide is here: https://accountkit.alchemy.com/migration-guide

[HatimPatwa]

Ok great will do. though it will take time because current architecture users v3 all over place 😄