def parse_collation_added_log(log):
# `shard_id` is the first indexed entry,hence the second entry in topics
shard_id_bytes32 = log['topics'][1]
data_bytes = decode_hex(log['data'])
header_bytes = shard_id_bytes32 + data_bytes[:-64]
is_new_head = bool(big_endian_to_int(data_bytes[-64:-32]))
score = big_endian_to_int(data_bytes[-32:])
collation_header = CollationHeader.from_bytes(header_bytes)
yield 'header', collation_header
yield 'is_new_head', is_new_head
yield 'score', score
def parse_collation_added_log(log):
# here assume `shard_id` is the first indexed , which is the second element in topics
shard_id_bytes32 = log['topics'][1]
data_hex = log['data']
data_bytes = decode_hex(data_hex)
score = big_endian_to_int(data_bytes[-32:])
is_new_head = bool(big_endian_to_int(data_bytes[-64:-32]))
header_bytes = shard_id_bytes32 + data_bytes[:-64]
collation_header = CollationHeader.from_bytes(header_bytes)
yield 'header', collation_header
yield 'is_new_head', is_new_head
yield 'score', score
def test_from_bytes_invalid_bytes_length(header_bytes):
with pytest.raises(ValidationError):
CollationHeader.from_bytes(header_bytes)
def test_from_bytes_valid_bytes_length(header_bytes, expected_header_dict):
actual_collation_header = CollationHeader.from_bytes(header_bytes)
expected_collation_header = CollationHeader(**expected_header_dict)
assert actual_collation_header == expected_collation_header