Report address as solvable based on inferred descriptor

Author: sipa

src/wallet/rpcwallet.cpp

@@ -3848,13 +3848,18 @@ RPCHelpMan getaddressinfo()
     isminetype mine = pwallet->IsMine(dest);
     ret.pushKV("ismine", bool(mine & ISMINE_SPENDABLE));
 
-    bool solvable = provider && IsSolvable(*provider, scriptPubKey);
-    ret.pushKV("solvable", solvable);
-
-    if (solvable) {
-       ret.pushKV("desc", InferDescriptor(scriptPubKey, *provider)->ToString());
+    if (provider) {
+        auto inferred = InferDescriptor(scriptPubKey, *provider);
+        bool solvable = inferred->IsSolvable() || IsSolvable(*provider, scriptPubKey);
+        ret.pushKV("solvable", solvable);
+        if (solvable) {
+            ret.pushKV("desc", inferred->ToString());
+        }
+    } else {
+        ret.pushKV("solvable", false);
     }
 
+
     DescriptorScriptPubKeyMan* desc_spk_man = dynamic_cast<DescriptorScriptPubKeyMan*>(pwallet->GetScriptPubKeyMan(scriptPubKey));
     if (desc_spk_man) {
         std::string desc_str;