wallet.signTransaction changes from v5.7 to v6.3

[jk-vg]

Between 5.7 and 6.3 the output of wallet.signTransaction() has changed slightly. This is causing failures on the chain I'm using.

Can someone explain the details behind this change?

The code in both cases is:
var signed_txn = await signerWallet.signTransaction(unsigned_txn)

The unsigned_txn and the wallet sig are the same input in both cases.

Using sample data for unsigned_txn and wallet key, the beginning of the signed_txn compares as:
V6 - 0x01f919438034832dc6c0
V5 - 0xf9194135832dc6c0833

[ricmoo]

What version of v5 were you using?

The above examples indicate with v5 you were using a legacy transaction while with v6 it detected the network supports type 1 (transaction envelope) transactions and so used that instead.

What chain are you using? Does it indeed support type 1 (but oddly not type 2 transactions)?

You can always force the transaction type to use legacy by including type: 0 in your tx, but it’d be preferable if it could detect that on its own.

[jk-vg]

Thanks for the reply!

v5.7 is the version.

How does it detect the network type? E.g. in this case, the wallet isn't aware of any Provider configuration, only the key.

The chain is a flavor of polygon, specifically the edge/supernets client. These are the types it supports:
const (
LegacyTx TxType = 0x0
StateTx TxType = 0x7f
DynamicFeeTx TxType = 0x02
)

Thanks for the suggestion of the type parameter. I confirmed that it updates the transaction type, and is likely the easiest solution at current.
Here is output that shows the impact of the suggestion.
Ethers version ethers/5.7.0 transaction { nonce: 1 } has signed 0xf8490180808080801ca...
Ethers version 6.3.0 transaction { nonce: 1, type: 0 } has signed 0xf8490180808080801ca...
Ethers version 6.3.0 transaction { nonce: 1 } has signed 0x02f84b8001808080808080c001...

For reference, here is test code for above:
async function test() {
var wallet = new ethers.Wallet(privateKey)
var txn = { nonce: 1 }
const signedTransaction = await wallet.signTransaction(txn)
console.log("Ethers version %s transaction %s has signed %s", ethers.version, txn, signedTransaction)
}

I'll proceed with the type parameters for now, unless you believe a separate course is better.