Source code for aries_cloudagent.protocols.issue_credential.v2_0.handlers.cred_proposal_handler

"""Credential proposal message handler."""

from .....anoncreds.issuer import AnonCredsIssuerError
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 V20CredManager, V20CredManagerError
from ..messages.cred_problem_report import ProblemReportReason
from ..messages.cred_proposal import V20CredProposal


[docs]class V20CredProposalHandler(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("V20CredProposalHandler called with context %s", context) assert isinstance(context.message, V20CredProposal) self._logger.info( "Received v2.0 credential proposal message: %s", context.message.serialize(as_string=True), ) # If connection is present it must be ready for use if context.connection_record and not context.connection_ready: raise HandlerException("Connection used for credential proposal not ready") elif not context.connection_record: raise HandlerException( "Connectionless not supported for credential proposal" ) profile = context.profile cred_manager = V20CredManager(profile) cred_ex_record = await cred_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 and cred_ex_record.auto_offer: cred_offer_message = None try: (cred_ex_record, cred_offer_message) = await cred_manager.create_offer( cred_ex_record, counter_proposal=None, comment=context.message.comment, ) await responder.send_reply(cred_offer_message) except ( BaseModelError, AnonCredsIssuerError, IndyIssuerError, LedgerError, StorageError, V20CredManagerError, ) as err: self._logger.exception("Error responding to credential proposal") async with profile.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, cred_offer_message, outcome="V20CredProposalHandler.handle.OFFER", perf_counter=r_time, )