How to add a dedicated account for fee paying ?

[kaiyes]

Hi, I've been trying in vein to add a fee payer account like we can for sending sols.

const swapTransactionBuf = Buffer.from(swapResult.swapTransaction, 'base64')
var transaction = VersionedTransaction.deserialize(swapTransactionBuf)

// Set fee payer
transaction.feePayer = feePayerkeypair.publicKey // Ensure the transaction's fee payer is set

transaction.recentBlockhash = (
await connection.getRecentBlockhash()
).blockhash

// Sign the transaction with both the wallet and the fee payer
transaction.sign([feePayer.keypair, accountKeypayer ]) // Sign the transaction with both the user's wallet and the fee payer

I always get the error "Cannot sign with non signer key"

[kaiyes]

This issue has the exact same problem as mine, but no answers there either
https://solana.stackexchange.com/questions/7432/setting-feepayer-of-versionedtransaction

[winter2009]

is there any udpate?

[distbit0]

I've also got the exact same issue