fix: dereference refs in vm relationship

Signed-off-by: Daniel Bluhm <[email protected]>

Author: dbluhm

acapy_agent/wallet/default_verification_key_strategy.py

@@ -4,10 +4,12 @@
 import logging
 from typing import Optional
 
-from acapy_agent.core.error import BaseError
-from acapy_agent.core.profile import Profile
-from acapy_agent.did.did_key import DIDKey
-from acapy_agent.resolver.did_resolver import DIDResolver
+from pydid import DIDDocument
+
+from ..core.error import BaseError
+from ..core.profile import Profile
+from ..did.did_key import DIDKey
+from ..resolver.did_resolver import DIDResolver
 
 LOGGER = logging.getLogger(__name__)
 
@@ -90,11 +92,21 @@ async def get_verification_method_id_for_did(
             return did + "#key-1"
 
         resolver = profile.inject(DIDResolver)
-        did_document = await resolver.resolve(profile=profile, did=did)
-        method_types = self.key_types_mapping[proof_type]
+        doc_raw = await resolver.resolve(profile=profile, did=did)
+        doc = DIDDocument.deserialize(doc_raw)
+
+        methods_or_refs = getattr(doc, proof_purpose, [])
+        # Dereference any refs in the verification relationship
+        methods = [
+            await resolver.dereference_verification_method(profile, method, document=doc)
+            if isinstance(method, str)
+            else method
+            for method in methods_or_refs
+        ]
 
-        methods = did_document.get(proof_purpose, [])
-        methods = [vm for vm in methods if vm.get("type") in method_types]
+        method_types = self.key_types_mapping[proof_type]
+        # Filter methods by type expected for proof_type
+        methods = [vm for vm in methods if vm.type in method_types]
         if not methods:
             raise VerificationKeyStrategyError(
                 f"No matching verification method found for did {did} with proof "