# standard imports
import logging
import datetime

logg = logging.getLogger(__name__)


def pre_callback():
    logg.debug('starting sync loop iteration')


def post_callback():
    logg.debug('ending sync loop iteration')


def block_callback(block, tx):
    logg.info('processing {} {}'.format(block, datetime.datetime.fromtimestamp(block.timestamp)))


def state_change_callback(k, old_state, new_state):
    logg.log(logging.STATETRACE, 'state change: {} {} -> {}'.format(k, old_state, new_state)) 


def filter_change_callback(k, old_state, new_state):
    logg.log(logging.STATETRACE, 'filter change: {} {} -> {}'.format(k, old_state, new_state))