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")
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,
) -> None:
if consensus_type == ConsensusType.POW_ETHASH:
nonce_bytes = block_header.nonce.to_bytes(8, byteorder="big")
if not check_pow(
block_header.height,
block_header.get_hash_for_mining(),
block_header.mixhash,
nonce_bytes,
block_header.difficulty,
):
raise ValueError("invalid pow proof")
elif consensus_type == ConsensusType.POW_SHA3SHA3:
nonce_bytes = block_header.nonce.to_bytes(8, byteorder="big")
target = (2**256 // (block_header.difficulty or 1) - 1).to_bytes(
32, byteorder="big")
h = sha3_256(sha3_256(block_header.get_hash_for_mining() +
nonce_bytes))
if not h < target:
raise ValueError("invalid pow proof")
def check_pow(state, header):
assert ethpow.check_pow(header.number, header.mining_hash, header.mixhash,
header.nonce, header.difficulty)
return True