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block.py
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block.py
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from usefulfunctions import int_to_little_endian, hash256, little_endian_to_int
class Block:
def __init__(
self, version, prev_block, merkle_root, timestamp, bits, nonce, tx_hashes=None
):
self.version = version
self.prev_block = prev_block
self.merkle_root = merkle_root
self.timestamp = timestamp
self.bits = bits
self.nonce = nonce
self.tx_hashes = tx_hashes
@classmethod
def parse(cls, s):
version = little_endian_to_int(s.read(4))
prev_block = s.read(32)[::-1]
merkle_root = s.read(32)[::-1]
timestamp = little_endian_to_int(s.read(4))
bits = s.read(4)
nonce = s.read(4)
return cls(version, prev_block, merkle_root, timestamp, bits, nonce)
def serialize(self):
result = int_to_little_endian(self.version, 4)
result += self.prev_block[::-1]
result += self.merkle_root[::-1]
result += int_to_little_endian(self.timestamp, 4)
result += self.bits[::-1]
result += self.nonce[::-1]
return result
def hash(self):
s = self.serialize()
h256 = hash256(s)
return h256[::-1]