"""Credential proposal message handler."""
from .....indy.issuer import IndyIssuerError
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 CredentialManager, CredentialManagerError
from ..messages.credential_problem_report import ProblemReportReason
from ..messages.credential_proposal import CredentialProposal
[docs]class CredentialProposalHandler(BaseHandler):
"""Message handler class for credential proposals."""
[docs] async def handle(self, context: RequestContext, responder: BaseResponder):
"""
Message handler logic for credential proposals.
Args:
context: proposal context
responder: responder callback
"""
r_time = get_timer()
self._logger.debug("CredentialProposalHandler called with context %s", context)
assert isinstance(context.message, CredentialProposal)
self._logger.info(
"Received credential proposal message: %s",
context.message.serialize(as_string=True),
)
if not context.connection_ready:
raise HandlerException("No connection established for credential proposal")
credential_manager = CredentialManager(context.profile)
cred_ex_record = await credential_manager.receive_proposal(
context.message, context.connection_record.connection_id
) # mgr only finds, saves record: on exception, saving state null is hopeless
r_time = trace_event(
context.settings,
context.message,
outcome="CredentialProposalHandler.handle.END",
perf_counter=r_time,
)
# If auto_offer is enabled, respond immediately with offer
if cred_ex_record.auto_offer:
credential_offer_message = None
try:
(
cred_ex_record,
credential_offer_message,
) = await credential_manager.create_offer(
cred_ex_record,
counter_proposal=None,
comment=context.message.comment,
)
await responder.send_reply(credential_offer_message)
except (
BaseModelError,
CredentialManagerError,
IndyIssuerError,
LedgerError,
StorageError,
) as err:
self._logger.exception(err)
if cred_ex_record:
async with context.session() as session:
await cred_ex_record.save_error_state(
session,
reason=err.roll_up, # us: be specific
)
await responder.send_reply(
problem_report_for_record(
cred_ex_record,
ProblemReportReason.ISSUANCE_ABANDONED.value, # them: vague
)
)
trace_event(
context.settings,
credential_offer_message,
outcome="CredentialProposalHandler.handle.OFFER",
perf_counter=r_time,
)