Walletwasabi: Trezor T broadcast transaction issues

[yahiheb]

I built a transaction (Trezor T wallet) and tried to broadcast it but I got the following errors:

Using Transaction Hex

Using PSBT Base64 String

[nopara73]

@yahiheb Can you try with different driver versions?

[yahiheb]

@yahiheb Can you try with different driver versions?

you mean different Wasabi version? or different Trezor firmware version?

[nopara73]

Trezor firmware. Also also could you do the Trezor T Kata (in the tests.)?

[yahiheb]

Trezor T Kata passed.

[molnard]

I could reproduce it. What was strange to me that for building the transaction I did not have to touch the device which leads me to think that the built transaction is not signed. Theory: when building a transaction with Trezor it is not sent to the device for signing.

[yahiheb]

which leads me to think that the built transaction is not signed.

Isn't this the expected behavior?

[molnard]

With CC you can put it on an SD card and sign it. But with Trezor it is impossible. So it is but for Trezor it is a useless feature, isnt it?

[lontivero]

The transaction building feature is for building transactions that have to be signed offline by a hw, it doesn't communicate with the HW at all so, if you try to broadcast that transaction then it will be rejected as unsigned.

[molnard]

Edge case: the user has offline Wasabi with a Trezor. He wants to have a signed hex tx to copy the tx with Pendrive to an online Wasabi and broadcast it.
Is there any other case where this would be useful? Because if not then I would consider it an unnecessary feature: to let the user have the signed tx in hex format.