From b4e5f35e6624fc5dca5bf6d073880c5b8ce35d71 Mon Sep 17 00:00:00 2001
From: Pavol Rusnak <pavol@rusnak.io>
Date: Mon, 7 Nov 2022 10:39:10 +0100
Subject: [PATCH] trezor: optimize signing speed by not serializing transaction
 in trezor

Since Electrum is not using TxRequestSerializedType.serialized_tx
we might ask the device not to serialize transactions
by setting SignTx.serialize=False

This flag is only present in trezorlib 0.13.4, so only users on that
version will benefit from the speedup.

However, we decided to keep the minimum required version to 0.13.0,
since the newer version is not strictly required.
---
 electrum/plugins/trezor/trezor.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/electrum/plugins/trezor/trezor.py b/electrum/plugins/trezor/trezor.py
index d7e165a1e..9dbfd5cac 100644
--- a/electrum/plugins/trezor/trezor.py
+++ b/electrum/plugins/trezor/trezor.py
@@ -363,6 +363,7 @@ class TrezorPlugin(HW_PluginBase):
                                        lock_time=tx.locktime,
                                        version=tx.version,
                                        amount_unit=self.get_trezor_amount_unit(),
+                                       serialize=False,
                                        prev_txes=prev_tx)
         signatures = [(bh2u(x) + '01') for x in signatures]
         tx.update_signatures(signatures)