def save_state(self) -> None:
# If Redis is enabled, save the current time indicating that the node
# monitor was alive at this time, the current session index, era index,
# and the last height checked.
if self.redis_enabled:
key_si = Keys.get_node_monitor_session_index(self.monitor_name)
key_ei = Keys.get_node_monitor_era_index(self.monitor_name)
key_lh = Keys.get_node_monitor_last_height_checked(
self.monitor_name)
key_alive = Keys.get_node_monitor_alive(self.monitor_name)
self.logger.debug('Saving node monitor state: %s=%s, %s=%s, %s=%s',
self._monitor_name, key_si, self._session_index,
key_lh, self._last_height_checked, key_ei,
self._era_index)
# Set session and era index keys
self.redis.set_multiple({
key_si: self._session_index,
key_ei: self._era_index
})
# Set last height checked key
until = timedelta(seconds=self._redis_last_height_key_timeout)
self.redis.set_for(key_lh, self._last_height_checked, until)
# Set alive key (to be able to query latest update from Telegram)
until = timedelta(seconds=self._redis_alive_key_timeout)
self.redis.set_for(key_alive, str(datetime.now().timestamp()),
until)
def load_state(self) -> None:
# If Redis is enabled, load the session index, era index, and last
# height checked for slashing if any.
if self.redis_enabled:
key_si = Keys.get_node_monitor_session_index(self.monitor_name)
key_ei = Keys.get_node_monitor_era_index(self.monitor_name)
key_lh = Keys.get_node_monitor_last_height_checked(
self.monitor_name)
self._session_index = self.redis.get_int(key_si, NONE)
self._era_index = self.redis.get_int(key_ei, NONE)
self._last_height_checked = self.redis.get_int(key_lh, NONE)
self.logger.debug('Restored %s state: %s=%s, %s=%s, %s=%s',
self._monitor_name, key_si, self._session_index,
key_lh, self._last_height_checked, key_ei,
self._era_index)
