<filename>talosblockchain/virtualchain/virtualchain/impl_ref/__init__.py<gh_stars>1-10
# required callbacks
from reference import get_virtual_chain_name, get_virtual_chain_version, get_first_block_id, get_db_state, db_parse, db_check, db_commit, db_save, db_serialize

# optional
try:
   from reference import get_op_processing_order
except:
   def get_op_processing_order():
      return None
<filename>talosblockchain/virtualchain/virtualchain/impl_ref/__init__.py<gh_stars>1-10
# required callbacks
from reference import get_virtual_chain_name, get_virtual_chain_version, get_first_block_id, get_db_state, db_parse, db_check, db_commit, db_save, db_serialize

# optional
try:
   from reference import get_op_processing_order
except:
   def get_op_processing_order():
      return None
# required callbacks # optional