Verify MD5hash from GCS

verify.py

import base64
import hashlib
source = [
    "/path/to/chainstate.txt",         # < -- edit this path
    "/path/to//chainstate.txt.sha256"  # < -- edit this path
]
for file in source:
    hash_md5 = hashlib.md5()
    with open(file, "rb") as f:
        for chunk in iter(lambda: f.read(4096), b""):
            hash_md5.update(chunk)
            local_md5 = base64.b64encode(hash_md5.digest()).decode("utf-8")
    print("MD5 (%s): %s" % (file, local_md5))