diff --git a/src/bitcoin-cli.cpp b/src/bitcoin-cli.cpp
--- a/src/bitcoin-cli.cpp
+++ b/src/bitcoin-cli.cpp
@@ -320,8 +320,7 @@
     /** Collect values from the batch and form a simulated `getinfo` reply. */
     UniValue ProcessReply(const UniValue &batch_in) override {
         UniValue result(UniValue::VOBJ);
-        std::vector<UniValue> batch =
-            JSONRPCProcessBatchReply(batch_in, batch_in.size());
+        const std::vector<UniValue> batch = JSONRPCProcessBatchReply(batch_in);
         // Errors in getnetworkinfo() and getblockchaininfo() are fatal, pass
         // them on; getwalletinfo() and getbalances are allowed to fail if there
         // is no wallet.
diff --git a/src/rpc/request.h b/src/rpc/request.h
--- a/src/rpc/request.h
+++ b/src/rpc/request.h
@@ -28,7 +28,7 @@
 /** Delete RPC authentication cookie from disk */
 void DeleteAuthCookie();
 /** Parse JSON-RPC batch reply into a vector */
-std::vector<UniValue> JSONRPCProcessBatchReply(const UniValue &in, size_t num);
+std::vector<UniValue> JSONRPCProcessBatchReply(const UniValue &in);
 
 class JSONRPCRequest {
 public:
diff --git a/src/rpc/request.cpp b/src/rpc/request.cpp
--- a/src/rpc/request.cpp
+++ b/src/rpc/request.cpp
@@ -134,19 +134,20 @@
     }
 }
 
-std::vector<UniValue> JSONRPCProcessBatchReply(const UniValue &in, size_t num) {
+std::vector<UniValue> JSONRPCProcessBatchReply(const UniValue &in) {
     if (!in.isArray()) {
         throw std::runtime_error("Batch must be an array");
     }
+    const size_t num{in.size()};
     std::vector<UniValue> batch(num);
-    for (size_t i = 0; i < in.size(); ++i) {
-        const UniValue &rec = in[i];
+    for (const UniValue &rec : in.getValues()) {
         if (!rec.isObject()) {
-            throw std::runtime_error("Batch member must be object");
+            throw std::runtime_error("Batch member must be an object");
         }
         size_t id = rec["id"].get_int();
         if (id >= num) {
-            throw std::runtime_error("Batch member id larger than size");
+            throw std::runtime_error(
+                "Batch member id is larger than batch size");
         }
         batch[id] = rec;
     }