def filterload(self, flag=1):
payload = encode_varint(self.size)
payload += bit_field_to_bytes(self.bit_field)
payload += int_to_little_endian(self.function_count, 4)
payload += int_to_little_endian(self.tweak, 4)
# The matched item flag is used to tell the full node to add any matched transactions to the bloom filter.
payload += int_to_little_endian(flag, 1)
# filterload is the command used to set the bloom filter.
return GenericMessage(b'filterload', payload)
def test_exercise_1(self):
field_size = 10
function_count = 5
tweak = 99
items = (b'Hello World', b'Goodbye!')
bit_field_size = field_size * 8
bit_field = [0] * bit_field_size
for item in items:
for i in range(function_count):
seed = i * BIP37_CONSTANT + tweak
h = murmur3(item, seed=seed)
bit = h % bit_field_size
bit_field[bit] = 1
self.assertEqual(
bit_field_to_bytes(bit_field).hex(), '4000600a080000010940')
def filter_bytes(self):
return bit_field_to_bytes(self.bit_field)