[CHIA-1024] Fix wallet observer mode log in while non-observer keys a…

…re present (#18361)

Fix wallet observer mode log in while non-observer keys are present

chia/_tests/wallet/test_wallet_node.py

@@ -720,3 +720,34 @@ async def validate_received_state_from_peer(*args: Any) -> bool:
 
     with pytest.raises(PeerRequestException):
         await wallet_node.get_coin_state([], wallet_node.get_full_node_peer())
+
+
+@pytest.mark.anyio
+@pytest.mark.standard_block_tools
+async def test_start_with_multiple_key_types(
+    simulator_and_wallet: OldSimulatorsAndWallets, self_hostname: str, default_400_blocks: List[FullBlock]
+) -> None:
+    [full_node_api], [(wallet_node, wallet_server)], bt = simulator_and_wallet
+
+    async def restart_with_fingerprint(fingerprint: Optional[int]) -> None:
+        wallet_node._close()
+        await wallet_node._await_closed(shutting_down=False)
+        await wallet_node._start_with_fingerprint(fingerprint=fingerprint)
+
+    initial_sk = wallet_node.wallet_state_manager.private_key
+
+    pk: G1Element = await wallet_node.keychain_proxy.add_key(
+        "c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+        None,
+        private=False,
+    )
+    fingerprint_pk: int = pk.get_fingerprint()
+
+    await restart_with_fingerprint(fingerprint_pk)
+    assert wallet_node.wallet_state_manager.private_key is None
+    assert wallet_node.wallet_state_manager.root_pubkey == G1Element()
+
+    await wallet_node.keychain_proxy.delete_key_by_fingerprint(fingerprint_pk)
+
+    await restart_with_fingerprint(fingerprint_pk)
+    assert wallet_node.wallet_state_manager.private_key == initial_sk

chia/daemon/keychain_proxy.py

@@ -365,7 +365,12 @@ async def get_key_for_fingerprint(
                             break
                     else:
                         raise KeychainKeyNotFound(fingerprint)
-                key = selected_key.private_key if private else selected_key.public_key
+                if private and selected_key.secrets is not None:
+                    key = selected_key.private_key
+                elif not private:
+                    key = selected_key.public_key
+                else:
+                    return None
         else:
             response, success = await self.get_response_for_request(
                 "get_key_for_fingerprint", {"fingerprint": fingerprint, "private": private}

chia/wallet/wallet_node.py

@@ -271,15 +271,17 @@ async def get_key_for_fingerprint(
 
         return key
 
-    async def get_key(self, fingerprint: Optional[int], private: bool = True) -> Optional[Union[PrivateKey, G1Element]]:
+    async def get_key(
+        self, fingerprint: Optional[int], private: bool = True, find_a_default: bool = True
+    ) -> Optional[Union[PrivateKey, G1Element]]:
         """
         Attempt to get the private key for the given fingerprint. If the fingerprint is None,
         get_key_for_fingerprint() will return the first private key. Similarly, if a key isn't
         returned for the provided fingerprint, the first key will be returned.
         """
         key: Optional[Union[PrivateKey, G1Element]] = await self.get_key_for_fingerprint(fingerprint, private=private)
 
-        if key is None and fingerprint is not None:
+        if key is None and fingerprint is not None and find_a_default:
             key = await self.get_key_for_fingerprint(None, private=private)
             if key is not None:
                 if isinstance(key, PrivateKey):
@@ -413,15 +415,19 @@ async def _start_with_fingerprint(
         multiprocessing_context = multiprocessing.get_context(method=multiprocessing_start_method)
         self._weight_proof_handler = WalletWeightProofHandler(self.constants, multiprocessing_context)
         self.synced_peers = set()
-        private_key = await self.get_key(fingerprint, private=True)
+        public_key = None
+        private_key = await self.get_key(fingerprint, private=True, find_a_default=False)
         if private_key is None:
-            public_key = await self.get_key(fingerprint, private=False)
-        else:
-            assert isinstance(private_key, PrivateKey)
-            public_key = private_key.get_g1()
+            public_key = await self.get_key(fingerprint, private=False, find_a_default=False)
+
         if public_key is None:
-            self.log_out()
-            return False
+            private_key = await self.get_key(None, private=True, find_a_default=True)
+            if private_key is not None:
+                assert isinstance(private_key, PrivateKey)
+                public_key = private_key.get_g1()
+            else:
+                self.log_out()
+                return False
         assert isinstance(public_key, G1Element)
         # override with private key fetched in case it's different from what was passed
         if fingerprint is None: