async def make_raw_block(self, b):
'''Construct a raw block'''
header = await self.make_raw_header(b)
transactions = []
if b.get('height') > 0:
transactions = await self.getrawtransactions(b.get('tx'), False)
raw_block = header
num_txs = len(transactions)
if num_txs > 0:
raw_block += int_to_varint(num_txs)
raw_block += b''.join(transactions)
else:
raw_block += b'\x00'
return raw_block
def test_int_to_varint():
with pytest.raises(ValueError):
util.int_to_varint(-1)
assert util.int_to_varint(0) == b'\0'
assert util.int_to_varint(5) == b'\5'
assert util.int_to_varint(252) == b'\xfc'
assert util.int_to_varint(253) == b'\xfd\xfd\0'
assert util.int_to_varint(65535) == b'\xfd\xff\xff'
assert util.int_to_varint(65536) == b'\xfe\0\0\1\0'
assert util.int_to_varint(2**32 - 1) == b'\xfe\xff\xff\xff\xff'
assert util.int_to_varint(2**32) == b'\xff\0\0\0\0\1\0\0\0'
assert util.int_to_varint(2**64-1) \
== b'\xff\xff\xff\xff\xff\xff\xff\xff\xff'