Merge pull request #3106 from ianco/fix/aath-vc_di-error

Fix the check for vc_di proof

aries_cloudagent/protocols/present_proof/v2_0/formats/dif/handler.py

@@ -492,7 +492,7 @@ async def verify_pres(self, pres_ex_record: V20PresExRecord) -> V20PresExRecord:
 
     def _get_type_manager_options(self, dif_proof: dict, pres_request: dict):
         """Get the type of manager and options based on the proof type."""
-        if dif_proof["proof"]["type"] == "DataIntegrityProof":
+        if dif_proof.get("proof") and dif_proof["proof"]["type"] == "DataIntegrityProof":
             manager = VcDiManager(self.profile)
             options = pres_request
         else: