rpc: Validate provided keys for query_options parameter in listunspent

With this change listunspent will throw an error if there is a wrong key
in the query_option object.

Signed-off-by: pasta <pasta@dashboost.org>

src/wallet/rpcwallet.cpp

@@ -2898,6 +2898,15 @@ static UniValue listunspent(const JSONRPCRequest& request)
     if (!request.params[4].isNull()) {
         const UniValue& options = request.params[4].get_obj();
 
+        RPCTypeCheckObj(options,
+            {
+                {"minimumAmount", UniValueType()},
+                {"maximumAmount", UniValueType()},
+                {"minimumSumAmount", UniValueType()},
+                {"maximumCount", UniValueType(UniValue::VNUM)},
+            },
+            true, true);
+
         if (options.exists("minimumAmount"))
             nMinimumAmount = AmountFromValue(options["minimumAmount"]);