clean up

Signed-off-by: Kevin Griffin <griffin.kev@gmail.com>

Author: m00sey

src/keri/app/keeping.py

@@ -1,3 +1,4 @@
+
 # -*- encoding: utf-8 -*-
 """
 KERI
@@ -43,11 +44,11 @@
 
 
 class ExternModule:
-    """Base class for external key management (HSM, Trezor, eSIM).
+    """Base class for external key management.
 
     Subclasses implement key generation and signing via external hardware
     security devices. The interface mirrors Manager.incept(), Manager.rotate(),
-    and Manager.sign() so it integrates as a drop-in for the extern algorithm.
+    and Manager.sign().
     """
 
     def incept(self, icodes=None, icount=1, icode=coring.MtrDex.Ed25519_Seed,
@@ -224,7 +225,7 @@ class Keeper(dbing.LMDBer):
         pres (subing.CesrSuber): named sub DB whose values are prefixes or first
             public keys
             Key is first public key in key sequence for a prefix (fully qualified qb64)
-            Value is prefix or first public key (temporary) (fully qualified qb64
+            Value is prefix or first public key (temporary) (fully qualified qb64)
         prms (koming.Komer): named sub DB whose values are serialized dicts of
             PrePrm instance
             Key is identifier prefix (fully qualified qb64)

tests/app/test_keeping.py

@@ -30,6 +30,20 @@
 from keri.app import keeping
 
 
+def test_extern_module():
+    """Test ExternModule base class raises NotImplementedError for all methods"""
+    mod = keeping.ExternModule()
+
+    with pytest.raises(NotImplementedError):
+        mod.incept()
+
+    with pytest.raises(NotImplementedError):
+        mod.rotate(pre="EExample")
+
+    with pytest.raises(NotImplementedError):
+        mod.sign(ser=b"test")
+
+
 def test_dataclasses():
     """
     test key set tracking and creation dataclasses