From d12bf422f36806478e0672a5398379f51b44d6ec Mon Sep 17 00:00:00 2001
From: Roman Zeyde <roman.zeyde@satoshilabs.com>
Date: Thu, 20 Mar 2025 14:12:16 +0200
Subject: [PATCH] fixup! chore(core): adapt trezorlib transports to session
 based [no changelog]

---
 python/src/trezorlib/transport/thp/protocol_v1.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/python/src/trezorlib/transport/thp/protocol_v1.py b/python/src/trezorlib/transport/thp/protocol_v1.py
index 675faadf23..9dfb4cb281 100644
--- a/python/src/trezorlib/transport/thp/protocol_v1.py
+++ b/python/src/trezorlib/transport/thp/protocol_v1.py
@@ -84,11 +84,11 @@ class ProtocolV1Channel(Channel):
 
         buffer = bytearray(b"##" + header + message_data)
         while buffer:
-            # Report ID, data padded to 63 bytes
+            # Report ID, data padded to (chunk_size - 1) bytes
             chunk = b"?" + buffer[: chunk_size - 1]
             chunk = chunk.ljust(chunk_size, b"\x00")
             self.transport.write_chunk(chunk)
-            buffer = buffer[63:]
+            buffer = buffer[chunk_size - 1:]
 
     def _read(self, timeout: float | None = None) -> t.Tuple[int, bytes]:
         if timeout is None: