RPC: unify arg type error message

We were throwing two different errors for the same problematic:

* "Expected type {expected], got {type}" --> RPCTypeCheckArgument()
* "JSON value of type {type} is not of expected type {expected}" --> UniValue::checkType()

1 files changed, 2 insertions, 1 deletions

diff --git a/src/rpc/util.cpp b/src/rpc/util.cpp
index 24ab21a947..43935650fa 100644
--- a/src/rpc/util.cpp
+++ b/src/rpc/util.cpp
@@ -50,7 +50,8 @@ void RPCTypeCheck(const UniValue& params,
 void RPCTypeCheckArgument(const UniValue& value, const UniValueType& typeExpected)
 {
     if (!typeExpected.typeAny && value.type() != typeExpected.type) {
-        throw JSONRPCError(RPC_TYPE_ERROR, strprintf("Expected type %s, got %s", uvTypeName(typeExpected.type), uvTypeName(value.type())));
+        throw JSONRPCError(RPC_TYPE_ERROR,
+                           strprintf("JSON value of type %s is not of expected type %s", uvTypeName(value.type()), uvTypeName(typeExpected.type)));
     }
 }