def validate_uncle(self, block, uncle):
"""
Validate the given uncle in the context of the given block.
"""
if uncle.block_number >= block.number:
raise ValidationError(
"Uncle number ({0}) is higher than block number ({1})".format(
uncle.block_number, block.number))
try:
parent_header = get_block_header_by_hash(uncle.parent_hash, self.chaindb)
except HeaderNotFound:
raise ValidationError(
"Uncle ancestor not found: {0}".format(uncle.parent_hash))
if uncle.block_number != parent_header.block_number + 1:
raise ValidationError(
"Uncle number ({0}) is not one above ancestor's number ({1})".format(
uncle.block_number, parent_header.block_number))
if uncle.timestamp < parent_header.timestamp:
raise ValidationError(
"Uncle timestamp ({0}) is before ancestor's timestamp ({1})".format(
uncle.timestamp, parent_header.timestamp))
if uncle.gas_used > uncle.gas_limit:
raise ValidationError(
"Uncle's gas usage ({0}) is above the limit ({1})".format(
uncle.gas_used, uncle.gas_limit))
def get_prev_hashes(cls, last_block_hash, db):
if last_block_hash == GENESIS_PARENT_HASH:
return
block_header = get_block_header_by_hash(last_block_hash, db)
for _ in range(MAX_PREV_HEADER_DEPTH):
yield block_header.hash
try:
block_header = get_parent_header(block_header, db)
except (IndexError, BlockNotFound):
break
def get_prev_hashes(cls, last_block_hash, db):
if last_block_hash == GENESIS_PARENT_HASH:
return
block_header = get_block_header_by_hash(last_block_hash, db)
for _ in range(MAX_PREV_HEADER_DEPTH):
yield block_header.hash
try:
block_header = get_parent_header(block_header, db)
except (IndexError, BlockNotFound):
break
def get_prev_headers(cls, last_block_hash, db):
prev_headers = []
if last_block_hash == GENESIS_PARENT_HASH:
return prev_headers
block_header = get_block_header_by_hash(last_block_hash, db)
for _ in range(MAX_PREV_HEADER_DEPTH):
prev_headers.append(block_header)
try:
block_header = get_parent_header(block_header, db)
except (IndexError, BlockNotFound):
break
return prev_headers
def validate_uncle(self, block, uncle):
if uncle.block_number >= block.number:
raise ValidationError(
"Uncle number ({0}) is higher than block number ({1})".format(
uncle.block_number, block.number))
try:
parent_header = get_block_header_by_hash(uncle.parent_hash, self.chaindb)
except BlockNotFound:
raise ValidationError(
"Uncle ancestor not found: {0}".format(uncle.parent_hash))
if uncle.block_number != parent_header.block_number + 1:
raise ValidationError(
"Uncle number ({0}) is not one above ancestor's number ({1})".format(
uncle.block_number, parent_header.block_number))
if uncle.timestamp < parent_header.timestamp:
raise ValidationError(
"Uncle timestamp ({0}) is before ancestor's timestamp ({1})".format(
uncle.timestamp, parent_header.timestamp))
if uncle.gas_used > uncle.gas_limit:
raise ValidationError(
"Uncle's gas usage ({0}) is above the limit ({1})".format(
uncle.gas_used, uncle.gas_limit))
