def initialize_historical_root_hashes(self, root_hash: Hash32, timestamp: Timestamp) -> None:
validate_is_bytes(root_hash, title='Head Hash')
validate_historical_timestamp(timestamp, title="timestamp")
#lets populate the root hash timestamp
first_root_hash_timestamp = [[timestamp, root_hash]]
self.save_historical_root_hashes(first_root_hash_timestamp)
def save_single_historical_root_hash(self, root_hash: Hash32, timestamp: Timestamp) -> None:
validate_is_bytes(root_hash, title='Head Hash')
validate_historical_timestamp(timestamp, title="timestamp")
historical = self.get_historical_root_hashes()
if historical is not None:
historical = SortedList(historical)
historical.add([timestamp, root_hash])
historical = list(historical)
else:
historical = [[timestamp, root_hash]]
self.save_historical_root_hashes(historical)
def save_single_historical_root_hash(self, root_hash: Hash32,
timestamp: Timestamp) -> None:
validate_is_bytes(root_hash, title='Head Hash')
validate_historical_timestamp(timestamp, title="timestamp")
historical = self.get_historical_root_hashes()
if historical is not None:
historical_dict = dict(historical)
historical_dict[timestamp] = root_hash
historical = list(historical_dict.items())
else:
historical = [[timestamp, root_hash]]
self.save_historical_root_hashes(historical)
def propogate_previous_historical_root_hash_to_timestamp(self, timestamp):
validate_historical_timestamp(timestamp, title="timestamp")
starting_timestamp, starting_root_hash = self.get_historical_root_hash(timestamp, return_timestamp = True)
if starting_timestamp == None:
raise AppendHistoricalRootHashTooOld("tried to propogate previous historical root hash, but there was no previous historical root hash")
else:
historical = SortedList(self.get_historical_root_hashes())
if starting_timestamp == timestamp:
#this means there is already a historical root hash for this time. Make sure it is correct. if not, delete it and all newer ones
timestamp_for_previous_good_root_hash, previous_good_root_hash = self.get_historical_root_hash(timestamp-TIME_BETWEEN_HEAD_HASH_SAVE, return_timestamp = True)
if starting_root_hash != previous_good_root_hash:
self.logger.debug("the existing historical root hash is incorrect. deleting this one and all future ones")
for timestamp_root_hash in reversed(historical.copy()):
if timestamp_root_hash[0] >= timestamp:
historical.pop()
for current_timestamp in range(starting_timestamp + TIME_BETWEEN_HEAD_HASH_SAVE, timestamp+TIME_BETWEEN_HEAD_HASH_SAVE, TIME_BETWEEN_HEAD_HASH_SAVE):
self.logger.debug("propogating previous root hash to time {}".format(current_timestamp))
historical.add([current_timestamp, starting_root_hash])
self.save_historical_root_hashes(list(historical))