electrum

commit 1ee99cf9c457f1fd1a417a3c04d3fe8af9e860a2
parent d906819b03454dde869237873f6b9285828e1905
Author: SomberNight <somber.night@protonmail.com>
Date:   Thu, 18 Feb 2021 20:40:38 +0100

interface: "block.headers": nicer error if server uses too low 'max'

related https://github.com/spesmilo/electrumx/commit/4ff6a9c4f022bcddad9c7f99d6f2f47360fb222d

Diffstat:
M
electrum/interface.py
 | 
3
+++

1 file changed, 3 insertions(+), 0 deletions(-)
diff --git a/electrum/interface.py b/electrum/interface.py
@@ -608,6 +608,9 @@ class Interface(Logger):
         assert_hex_str(res['hex'])
         if len(res['hex']) != HEADER_SIZE * 2 * res['count']:
             raise RequestCorrupted('inconsistent chunk hex and count')
+        # we never request more than 2016 headers, but we enforce those fit in a single response
+        if res['max'] < 2016:
+            raise RequestCorrupted(f"server uses too low 'max' count for block.headers: {res['max']} < 2016")
         if res['count'] != size:
             raise RequestCorrupted(f"expected {size} headers but only got {res['count']}")
         conn = self.blockchain.connect_chunk(index, res['hex'])