forked from LBRYCommunity/lbry-sdk
61 lines
1.7 KiB
Python
61 lines
1.7 KiB
Python
import struct
|
|
from typing import Set
|
|
from typing import NamedTuple, List
|
|
|
|
from chiabip158 import PyBIP158 # pylint: disable=no-name-in-module
|
|
|
|
from lbry.crypto.hash import double_sha256
|
|
from lbry.blockchain.transaction import Transaction
|
|
from lbry.blockchain.bcd_data_stream import BCDataStream
|
|
|
|
|
|
ZERO_BLOCK = bytes((0,)*32)
|
|
|
|
|
|
def create_block_filter(address_hashes: Set[bytes]) -> bytes:
|
|
return bytes(PyBIP158([bytearray(a) for a in address_hashes]).GetEncoded())
|
|
|
|
|
|
def get_block_filter(block_filter: bytes) -> PyBIP158:
|
|
return PyBIP158(bytearray(block_filter))
|
|
|
|
|
|
class Block(NamedTuple):
|
|
height: int
|
|
version: int
|
|
file_number: int
|
|
block_hash: bytes
|
|
prev_block_hash: bytes
|
|
merkle_root: bytes
|
|
claim_trie_root: bytes
|
|
timestamp: int
|
|
bits: int
|
|
nonce: int
|
|
txs: List[Transaction]
|
|
|
|
@staticmethod
|
|
def from_data_stream(stream: BCDataStream, height: int, file_number: int):
|
|
header = stream.data.read(112)
|
|
version, = struct.unpack('<I', header[:4])
|
|
timestamp, bits, nonce = struct.unpack('<III', header[100:112])
|
|
tx_count = stream.read_compact_size()
|
|
return Block(
|
|
height=height,
|
|
version=version,
|
|
file_number=file_number,
|
|
block_hash=double_sha256(header),
|
|
prev_block_hash=header[4:36],
|
|
merkle_root=header[36:68],
|
|
claim_trie_root=header[68:100][::-1],
|
|
timestamp=timestamp,
|
|
bits=bits,
|
|
nonce=nonce,
|
|
txs=[
|
|
Transaction(height=height, position=i, timestamp=timestamp).deserialize(stream)
|
|
for i in range(tx_count)
|
|
]
|
|
)
|
|
|
|
@property
|
|
def is_first_block(self):
|
|
return self.prev_block_hash == ZERO_BLOCK
|