def mine(self, start_nonce: int, end_nonce: int) -> Optional[MiningResult]:
for nonce in range(start_nonce, end_nonce):
nonce_bytes = nonce.to_bytes(8, byteorder="big")
h = sha256(sha256(self.header_hash + nonce_bytes))
if h < self.target:
return MiningResult(self.header_hash, nonce, bytes(32))
return None
def validate_seal(
block_header: Header,
consensus_type: ConsensusType,
adjusted_diff: int = None, # for overriding
**kwargs) -> None:
diff = adjusted_diff if adjusted_diff is not None else block_header.difficulty
nonce_bytes = block_header.nonce.to_bytes(8, byteorder="big")
if consensus_type == ConsensusType.POW_ETHASH:
if not check_pow(
block_header.height,
block_header.get_hash_for_mining(),
block_header.mixhash,
nonce_bytes,
diff,
):
raise ValueError("invalid pow proof")
elif consensus_type == ConsensusType.POW_QKCHASH:
if not qkchash_check_pow(
block_header.height,
block_header.get_hash_for_mining(),
block_header.mixhash,
nonce_bytes,
diff,
kwargs.get("qkchash_with_rotation_stats", False),
):
raise ValueError("invalid pow proof")
elif consensus_type == ConsensusType.POW_DOUBLESHA256:
target = (2**256 // (diff or 1) - 1).to_bytes(32, byteorder="big")
h = sha256(sha256(block_header.get_hash_for_mining() + nonce_bytes))
if not h < target:
raise ValueError("invalid pow proof")
def validate_seal(
block_header: Union[RootBlockHeader, MinorBlockHeader],
consensus_type: ConsensusType,
adjusted_diff: int = None, # for overriding
) -> None:
diff = adjusted_diff if adjusted_diff is not None else block_header.difficulty
nonce_bytes = block_header.nonce.to_bytes(8, byteorder="big")
if consensus_type == ConsensusType.POW_ETHASH:
if not check_pow(
block_header.height,
block_header.get_hash_for_mining(),
block_header.mixhash,
nonce_bytes,
diff,
):
raise ValueError("invalid pow proof")
elif consensus_type == ConsensusType.POW_QKCHASH:
if not qkchash_check_pow(
block_header.get_hash_for_mining(), block_header.mixhash, nonce_bytes, diff
):
raise ValueError("invalid pow proof")
elif consensus_type == ConsensusType.POW_SHA3SHA3:
target = (2 ** 256 // (diff or 1) - 1).to_bytes(32, byteorder="big")
h = sha256(sha256(block_header.get_hash_for_mining() + nonce_bytes))
if not h < target:
raise ValueError("invalid pow proof")
