Phantom - RPC Error: Something went wrong -32603

Question

I try to sign a text and I get this error.

const anchorWallet = useAnchorWallet();

const MEMO_PROGRAM_ADDRESS = "MemoSq4gqABAXKb96qnH8TysNcWxMyWCqXgDLGmfcHr";
const MEMO_PROGRAM_ID = new PublicKey(MEMO_PROGRAM_ADDRESS);

const onTestSign = async () => {
   if (!anchorWallet) return;

   const tx = new Transaction();
   tx.add(
      new TransactionInstruction({
         programId: MEMO_PROGRAM_ID,
         keys: [],
         data: Buffer.from("hello world", "utf8"),
      })
   );

   tx.feePayer = anchorWallet.publicKey;
   tx.recentBlockhash = Keypair.generate().publicKey.toString();

   await anchorWallet.signTransaction(tx);
};

Again Above code works well on localhost, but when I test on the live server I got the above error.

Live: https://solana-web2-auth.vercel.app/

Thanks

Answer 1

You're not grabbing a valid blockhash:

tx.recentBlockhash = Keypair.generate().publicKey.toString();

Try replacing it with a recent blockhash:

let latestBlockhash = await connection.getLatestBlockhash('finalized');
tx.recentBlockhash = latestBlockhash.blockhash;