"""Presentation proposal message handler."""
from .....ledger.error import LedgerError
from .....messaging.base_handler import BaseHandler, HandlerException
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 V20PresManager
from ..messages.pres_problem_report import ProblemReportReason
from ..messages.pres_proposal import V20PresProposal
[docs]class V20PresProposalHandler(BaseHandler):
"""Message handler class for presentation proposals."""
[docs] async def handle(self, context: RequestContext, responder: BaseResponder):
"""
Message handler logic for presentation proposals.
Args:
context: proposal context
responder: responder callback
"""
r_time = get_timer()
self._logger.debug("V20PresProposalHandler called with context %s", context)
assert isinstance(context.message, V20PresProposal)
self._logger.info(
"Received v2.0 presentation proposal message: %s",
context.message.serialize(as_string=True),
)
if not context.connection_record:
raise HandlerException(
"Connectionless not supported for presentation proposal"
)
# If connection is present it must be ready for use
elif not context.connection_ready:
raise HandlerException(
"Connection used for presentation proposal not ready"
)
profile = context.profile
pres_manager = V20PresManager(profile)
pres_ex_record = await pres_manager.receive_pres_proposal(
context.message, context.connection_record
) # mgr only creates, saves record: on exception, saving state err is hopeless
r_time = trace_event(
context.settings,
context.message,
outcome="V20PresProposalHandler.handle.END",
perf_counter=r_time,
)
# If auto_respond_presentation_proposal is set, reply with proof req
if context.settings.get("debug.auto_respond_presentation_proposal"):
pres_request_message = None
try:
(
pres_ex_record,
pres_request_message,
) = await pres_manager.create_bound_request(
pres_ex_record=pres_ex_record,
comment=context.message.comment,
)
await responder.send_reply(pres_request_message)
except (BaseModelError, LedgerError, StorageError) as err:
self._logger.exception(err)
if pres_ex_record:
async with profile.session() as session:
await pres_ex_record.save_error_state(
session,
reason=err.roll_up, # us: be specific
)
await responder.send_reply(
problem_report_for_record(
pres_ex_record,
ProblemReportReason.ABANDONED.value, # them: be vague
)
)
trace_event(
context.settings,
pres_request_message,
outcome="V20PresProposalHandler.handle.PRESENT",
perf_counter=r_time,
)