Take non-importing keys into account for spendability warning in descriptor import

Author: sipa

src/wallet/rpcdump.cpp

@@ -1197,6 +1197,9 @@ static UniValue ProcessImportDescriptor(ImportData& import_data, std::map<CKeyID
     bool spendable = std::all_of(pubkey_map.begin(), pubkey_map.end(),
         [&](const std::pair<CKeyID, CPubKey>& used_key) {
             return privkey_map.count(used_key.first) > 0;
+        }) && std::all_of(import_data.key_origins.begin(), import_data.key_origins.end(),
+        [&](const std::pair<CKeyID, std::pair<CPubKey, KeyOriginInfo>>& entry) {
+            return privkey_map.count(entry.first) > 0;
         });
     if (!watch_only && !spendable) {
         warnings.push_back("Some private keys are missing, outputs will be considered watchonly. If this is intentional, specify the watchonly flag.");

test/functional/wallet_importmulti.py

@@ -629,7 +629,8 @@ def run_test(self):
         self.log.info("Should import a 1-of-2 bare multisig from descriptor")
         self.test_importmulti({"desc": descsum_create("multi(1," + key1.pubkey + "," + key2.pubkey + ")"),
                                "timestamp": "now"},
-                              success=True)
+                              success=True,
+                              warnings=["Some private keys are missing, outputs will be considered watchonly. If this is intentional, specify the watchonly flag."])
         self.log.info("Should not treat individual keys from the imported bare multisig as watchonly")
         test_address(self.nodes[1],
                      key1.p2pkh_addr,