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add: sanity check for block files #38

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Merged
0xB10C merged 1 commit into from
Aug 29, 2025
Merged

add: sanity check for block files #38

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13 changes: 13 additions & 0 deletions ci/sanity-check.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,9 +4,11 @@
# - file is ordered by block height in descending order
# - header hashes match header (by hashing)
# - header hashes are unique
# - binary block files have a correct bitcoin block header

import csv
import hashlib
import os

EXPECTED_COLUMNS = 3

Expand Down Expand Up @@ -42,6 +44,17 @@ def dsha256(d):

hash_count[header_hash] = hash_count.get(header_hash, 0) + 1

blockfile = f"blocks/{height}-{header_hash}.bin"
if os.path.exists(blockfile):
print(f"checking block file: {blockfile}")
with open(blockfile, "rb") as block:
header_bytes = block.read(80)
calculated_header_hash = bytes(reversed(dsha256(header_bytes))).hex()
assert header_hash == calculated_header_hash

header_hex = header_bytes.hex()
assert header == header_hex

hash_appeared_multiple_times = False
for e in hash_count.items():
header_hash, count = e
Expand Down