Module mydata_did.patched_protocols.present_proof.v1_0.handlers.presentation_request_handler
Presentation request message handler.
Expand source code
"""Presentation request message handler."""
from aries_cloudagent.messaging.base_handler import (
BaseHandler,
BaseResponder,
HandlerException,
RequestContext,
)
from aries_cloudagent.holder.base import BaseHolder
from aries_cloudagent.storage.error import StorageNotFoundError
from aries_cloudagent.utils.tracing import trace_event, get_timer
from dexa_sdk.managers.ada_manager import V2ADAManager
from ..manager import PresentationManager
from ..messages.presentation_proposal import PresentationProposal
from ..messages.presentation_request import PresentationRequest
from ..models.presentation_exchange import V10PresentationExchange
from ..util.indy import indy_proof_req_preview2indy_requested_creds
from .....v1_0.decorators.data_agreement_context_decorator import DataAgreementContextDecorator
class PresentationRequestHandler(BaseHandler):
"""Message handler class for Aries#0037 v1.0 presentation requests."""
async def handle(self, context: RequestContext, responder: BaseResponder):
"""
Message handler logic for Aries#0037 v1.0 presentation requests.
Args:
context: request context
responder: responder callback
"""
r_time = get_timer()
self._logger.debug("PresentationRequestHandler called with context %s", context)
assert isinstance(context.message, PresentationRequest)
self._logger.info(
"Received presentation request message: %s",
context.message.serialize(as_string=True),
)
if not context.connection_ready:
raise HandlerException("No connection established for presentation request")
presentation_manager = PresentationManager(context)
indy_proof_request = context.message.indy_proof_request(0)
# Get presentation exchange record (holder initiated via proposal)
# or create it (verifier sent request first)
try:
(
presentation_exchange_record
) = await V10PresentationExchange.retrieve_by_tag_filter(
context,
{"thread_id": context.message._thread_id},
{"connection_id": context.connection_record.connection_id},
) # holder initiated via proposal
except StorageNotFoundError: # verifier sent this request free of any proposal
presentation_exchange_record = V10PresentationExchange(
connection_id=context.connection_record.connection_id,
thread_id=context.message._thread_id,
initiator=V10PresentationExchange.INITIATOR_EXTERNAL,
role=V10PresentationExchange.ROLE_PROVER,
presentation_request=indy_proof_request,
auto_present=context.settings.get(
"debug.auto_respond_presentation_request"
),
trace=(context.message._trace is not None),
)
presentation_exchange_record.presentation_request = indy_proof_request
presentation_exchange_record = await presentation_manager.receive_request(
presentation_exchange_record
)
# Initialise ADA manager
manager = V2ADAManager(context)
# Process data agreement context decorator if present.
# Create data agreement instance from da offer.
instance_record = await manager.process_decorator_with_da_offer_message(
context.message._decorators,
presentation_exchange_record,
context.connection_record
)
r_time = trace_event(
context.settings,
context.message,
outcome="PresentationRequestHandler.handle.END",
perf_counter=r_time,
)
# If auto_present is enabled, respond immediately with presentation
if presentation_exchange_record.auto_present:
presentation_preview = None
if presentation_exchange_record.presentation_proposal_dict:
exchange_pres_proposal = PresentationProposal.deserialize(
presentation_exchange_record.presentation_proposal_dict
)
presentation_preview = exchange_pres_proposal.presentation_proposal
try:
req_creds = await indy_proof_req_preview2indy_requested_creds(
indy_proof_request,
presentation_preview,
holder=await context.inject(BaseHolder),
)
except ValueError as err:
self._logger.warning(f"{err}")
return
(
presentation_exchange_record,
presentation_message,
) = await presentation_manager.create_presentation(
presentation_exchange_record=presentation_exchange_record,
requested_credentials=req_creds,
comment="auto-presented for proof request nonce={}".format(
indy_proof_request["nonce"]
),
)
# Build data agreement negotiation accept message
accept_message = \
await manager.build_data_agreement_negotiation_accept_by_instance_id(
instance_record.instance_id,
context.connection_record
)
# Update presentation message with data agreement context decorator
presentation_message._decorators["data-agreement-context"] = \
DataAgreementContextDecorator(
message_type="protocol",
message=accept_message.serialize()
)
await responder.send_reply(presentation_message)
trace_event(
context.settings,
presentation_message,
outcome="PresentationRequestHandler.handle.PRESENT",
perf_counter=r_time,
)Classes
class PresentationRequestHandler-
Message handler class for Aries#0037 v1.0 presentation requests.
Initialize a BaseHandler instance.
Expand source code
class PresentationRequestHandler(BaseHandler): """Message handler class for Aries#0037 v1.0 presentation requests.""" async def handle(self, context: RequestContext, responder: BaseResponder): """ Message handler logic for Aries#0037 v1.0 presentation requests. Args: context: request context responder: responder callback """ r_time = get_timer() self._logger.debug("PresentationRequestHandler called with context %s", context) assert isinstance(context.message, PresentationRequest) self._logger.info( "Received presentation request message: %s", context.message.serialize(as_string=True), ) if not context.connection_ready: raise HandlerException("No connection established for presentation request") presentation_manager = PresentationManager(context) indy_proof_request = context.message.indy_proof_request(0) # Get presentation exchange record (holder initiated via proposal) # or create it (verifier sent request first) try: ( presentation_exchange_record ) = await V10PresentationExchange.retrieve_by_tag_filter( context, {"thread_id": context.message._thread_id}, {"connection_id": context.connection_record.connection_id}, ) # holder initiated via proposal except StorageNotFoundError: # verifier sent this request free of any proposal presentation_exchange_record = V10PresentationExchange( connection_id=context.connection_record.connection_id, thread_id=context.message._thread_id, initiator=V10PresentationExchange.INITIATOR_EXTERNAL, role=V10PresentationExchange.ROLE_PROVER, presentation_request=indy_proof_request, auto_present=context.settings.get( "debug.auto_respond_presentation_request" ), trace=(context.message._trace is not None), ) presentation_exchange_record.presentation_request = indy_proof_request presentation_exchange_record = await presentation_manager.receive_request( presentation_exchange_record ) # Initialise ADA manager manager = V2ADAManager(context) # Process data agreement context decorator if present. # Create data agreement instance from da offer. instance_record = await manager.process_decorator_with_da_offer_message( context.message._decorators, presentation_exchange_record, context.connection_record ) r_time = trace_event( context.settings, context.message, outcome="PresentationRequestHandler.handle.END", perf_counter=r_time, ) # If auto_present is enabled, respond immediately with presentation if presentation_exchange_record.auto_present: presentation_preview = None if presentation_exchange_record.presentation_proposal_dict: exchange_pres_proposal = PresentationProposal.deserialize( presentation_exchange_record.presentation_proposal_dict ) presentation_preview = exchange_pres_proposal.presentation_proposal try: req_creds = await indy_proof_req_preview2indy_requested_creds( indy_proof_request, presentation_preview, holder=await context.inject(BaseHolder), ) except ValueError as err: self._logger.warning(f"{err}") return ( presentation_exchange_record, presentation_message, ) = await presentation_manager.create_presentation( presentation_exchange_record=presentation_exchange_record, requested_credentials=req_creds, comment="auto-presented for proof request nonce={}".format( indy_proof_request["nonce"] ), ) # Build data agreement negotiation accept message accept_message = \ await manager.build_data_agreement_negotiation_accept_by_instance_id( instance_record.instance_id, context.connection_record ) # Update presentation message with data agreement context decorator presentation_message._decorators["data-agreement-context"] = \ DataAgreementContextDecorator( message_type="protocol", message=accept_message.serialize() ) await responder.send_reply(presentation_message) trace_event( context.settings, presentation_message, outcome="PresentationRequestHandler.handle.PRESENT", perf_counter=r_time, )Ancestors
- aries_cloudagent.messaging.base_handler.BaseHandler
- abc.ABC
Methods
async def handle(self, context: aries_cloudagent.messaging.request_context.RequestContext, responder: aries_cloudagent.messaging.responder.BaseResponder)-
Message handler logic for Aries#0037 v1.0 presentation requests.
Args
context- request context
responder- responder callback
Expand source code
async def handle(self, context: RequestContext, responder: BaseResponder): """ Message handler logic for Aries#0037 v1.0 presentation requests. Args: context: request context responder: responder callback """ r_time = get_timer() self._logger.debug("PresentationRequestHandler called with context %s", context) assert isinstance(context.message, PresentationRequest) self._logger.info( "Received presentation request message: %s", context.message.serialize(as_string=True), ) if not context.connection_ready: raise HandlerException("No connection established for presentation request") presentation_manager = PresentationManager(context) indy_proof_request = context.message.indy_proof_request(0) # Get presentation exchange record (holder initiated via proposal) # or create it (verifier sent request first) try: ( presentation_exchange_record ) = await V10PresentationExchange.retrieve_by_tag_filter( context, {"thread_id": context.message._thread_id}, {"connection_id": context.connection_record.connection_id}, ) # holder initiated via proposal except StorageNotFoundError: # verifier sent this request free of any proposal presentation_exchange_record = V10PresentationExchange( connection_id=context.connection_record.connection_id, thread_id=context.message._thread_id, initiator=V10PresentationExchange.INITIATOR_EXTERNAL, role=V10PresentationExchange.ROLE_PROVER, presentation_request=indy_proof_request, auto_present=context.settings.get( "debug.auto_respond_presentation_request" ), trace=(context.message._trace is not None), ) presentation_exchange_record.presentation_request = indy_proof_request presentation_exchange_record = await presentation_manager.receive_request( presentation_exchange_record ) # Initialise ADA manager manager = V2ADAManager(context) # Process data agreement context decorator if present. # Create data agreement instance from da offer. instance_record = await manager.process_decorator_with_da_offer_message( context.message._decorators, presentation_exchange_record, context.connection_record ) r_time = trace_event( context.settings, context.message, outcome="PresentationRequestHandler.handle.END", perf_counter=r_time, ) # If auto_present is enabled, respond immediately with presentation if presentation_exchange_record.auto_present: presentation_preview = None if presentation_exchange_record.presentation_proposal_dict: exchange_pres_proposal = PresentationProposal.deserialize( presentation_exchange_record.presentation_proposal_dict ) presentation_preview = exchange_pres_proposal.presentation_proposal try: req_creds = await indy_proof_req_preview2indy_requested_creds( indy_proof_request, presentation_preview, holder=await context.inject(BaseHolder), ) except ValueError as err: self._logger.warning(f"{err}") return ( presentation_exchange_record, presentation_message, ) = await presentation_manager.create_presentation( presentation_exchange_record=presentation_exchange_record, requested_credentials=req_creds, comment="auto-presented for proof request nonce={}".format( indy_proof_request["nonce"] ), ) # Build data agreement negotiation accept message accept_message = \ await manager.build_data_agreement_negotiation_accept_by_instance_id( instance_record.instance_id, context.connection_record ) # Update presentation message with data agreement context decorator presentation_message._decorators["data-agreement-context"] = \ DataAgreementContextDecorator( message_type="protocol", message=accept_message.serialize() ) await responder.send_reply(presentation_message) trace_event( context.settings, presentation_message, outcome="PresentationRequestHandler.handle.PRESENT", perf_counter=r_time, )