"""Presentation message handler."""
from .....ledger.error import LedgerError
from .....messaging.base_handler import BaseHandler
from .....messaging.models.base import BaseModelError
from .....messaging.request_context import RequestContext
from .....messaging.responder import BaseResponder
from .....storage.error import StorageError
from .....utils.tracing import trace_event, get_timer
from .. import problem_report_for_record
from ..manager import PresentationManager
from ..messages.presentation import Presentation
from ..messages.presentation_problem_report import ProblemReportReason
[docs]class PresentationHandler(BaseHandler):
"""Message handler class for presentations."""
[docs] async def handle(self, context: RequestContext, responder: BaseResponder):
"""
Message handler logic for presentations.
Args:
context: request context
responder: responder callback
"""
r_time = get_timer()
self._logger.debug("PresentationHandler called with context %s", context)
assert isinstance(context.message, Presentation)
self._logger.info(
"Received presentation message: %s",
context.message.serialize(as_string=True),
)
presentation_manager = PresentationManager(context.profile)
presentation_exchange_record = await presentation_manager.receive_presentation(
context.message, context.connection_record
) # mgr saves record state null if need be and possible
r_time = trace_event(
context.settings,
context.message,
outcome="PresentationHandler.handle.END",
perf_counter=r_time,
)
# Automatically move to next state if flag is set
if context.settings.get("debug.auto_verify_presentation"):
try:
await presentation_manager.verify_presentation(
presentation_exchange_record
)
except (BaseModelError, LedgerError, StorageError) as err:
self._logger.exception(err)
if presentation_exchange_record:
async with context.session() as session:
await presentation_exchange_record.save_error_state(
session,
reason=err.roll_up, # us: be specific
)
await responder.send_reply(
problem_report_for_record(
presentation_exchange_record,
ProblemReportReason.ABANDONED.value, # them: be vague
)
)
trace_event(
context.settings,
presentation_exchange_record,
outcome="PresentationHandler.handle.VERIFY",
perf_counter=r_time,
)