TypeError: Cannot use 'in' operator to search for 'chainId' when I try to send a signed transaction using provider.sendTransaction

[Bot80926]

Ethers Version

6.9.0

Search Terms

No response

Describe the Problem

step1: get signed hash by using provider.signTransaction
step2: tried to use provider.sendTransaction to broadcast Transaction
errors come out: transfer error = TypeError: Cannot use 'in' operator to search for 'chainId' in step1 hash

Code Snippet

const wallet = new ethers.Wallet('private key', new Provider({
   chain:    "Merlin Mainnet",
   chainId:  4200,
   fullnode: "https://rpc.merlinchain.io",
}).getProvider());
const nonce = await wallet.getNonce();
const transaction = await wallet.signTransaction({
            from: wallet.address,
            to: address,
            data: hex,
            chainId: 4200,
            nonce: nonce,
   })
const transferHash = await wallet.sendTransaction(transaction)

Contract ABI

No response

Errors

transfer error = TypeError: Cannot use 'in' operator to search for 'chainId' in "transaction", "transaction" is the return result where i called "wallet.signTransaction"

Environment

node.js (v12 or newer)

Environment (Other)

No response

[ricmoo]

The result of wallet.signTransaction is a serialized signed transaction, which is a hexstring intended to be passed to provider.broadcastTransaction.

The signer.sendTransaction is intended to be passed the same TransactionRequest object that you passed to signTransaction; internally it will use signTransaction and then broadcast it using the provider.

Does that make sense?

[ricmoo]

(moving to discussions)