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test: Check snapshot file with wrong number of coins

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Also, fix a bug in an assert_debug_log call.
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MarcoFalke 2023-10-12 11:21:08 +02:00
parent faa90f6e7b
commit fafde92f84
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1 changed files with 16 additions and 4 deletions
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20
test/functional/feature_assumeutxo.py
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@ -40,7 +40,7 @@ from test_framework.util import (
assert_equal,
assert_raises_rpc_error,
)
import struct
START_HEIGHT = 199
SNAPSHOT_BASE_HEIGHT = 299
@ -68,23 +68,35 @@ class AssumeutxoTest(BitcoinTestFramework):
def test_invalid_snapshot_scenarios(self, valid_snapshot_path):
self.log.info("Test different scenarios of loading invalid snapshot files")
self.log.info(" - snapshot file refering to a block that is not in the assumeutxo parameters")
with open(valid_snapshot_path, 'rb') as f:
valid_snapshot_contents = f.read()
bad_snapshot_path = valid_snapshot_path + '.mod'
self.log.info(" - snapshot file refering to a block that is not in the assumeutxo parameters")
# we can only test this with a block that is already known, as otherwise the `loadtxoutset` RPC
# would time out (waiting to see the hash in the headers chain), rather than error immediately
bad_snapshot_height = SNAPSHOT_BASE_HEIGHT - 1
bad_snapshot_path = valid_snapshot_path + '.mod'
with open(bad_snapshot_path, 'wb') as f:
bad_snapshot_block_hash = self.nodes[0].getblockhash(bad_snapshot_height)
# block hash of the snapshot base is stored right at the start (first 32 bytes)
f.write(bytes.fromhex(bad_snapshot_block_hash)[::-1] + valid_snapshot_contents[32:])
expected_log = f"assumeutxo height in snapshot metadata not recognized ({bad_snapshot_height}) - refusing to load snapshot"
with self.nodes[1].assert_debug_log(expected_log):
with self.nodes[1].assert_debug_log([expected_log]):
assert_raises_rpc_error(-32603, "Unable to load UTXO snapshot", self.nodes[1].loadtxoutset, bad_snapshot_path)
self.log.info(" - snapshot file with wrong number of coins")
valid_num_coins = struct.unpack("<I", valid_snapshot_contents[32:32 + 4])[0]
for off in [-1, +1]:
with open(bad_snapshot_path, 'wb') as f:
f.write(valid_snapshot_contents[:32])
f.write(struct.pack("<I", valid_num_coins + off))
f.write(valid_snapshot_contents[32 + 4:])
expected_log = f"bad snapshot - coins left over after deserializing 298 coins" if off == -1 else f"bad snapshot format or truncated snapshot after deserializing 299 coins"
with self.nodes[1].assert_debug_log([expected_log]):
assert_raises_rpc_error(-32603, "Unable to load UTXO snapshot", self.nodes[1].loadtxoutset, bad_snapshot_path)
def run_test(self):
"""
Bring up two (disconnected) nodes, mine some new blocks on the first,