Currently when launching `bitcoind` with `-debug=rpc` the log is rather sparse, e.g. `ThreadRPCServer method=validateaddres`. If possible I'd like it to show the origin IP.
/**
 * Type-check arguments; throws JSONRPCError if wrong type given. Does not check that
 * the right number of arguments are passed, just that any passed are the correct type.
 */
void RPCTypeCheck(const UniValue& params,
                  const std::list<UniValueType>& typesExpected, bool fAllowNull=false);
/**
 * Type-check one argument; throws JSONRPCError if wrong type given.
 */
void RPCTypeCheckArgument(const UniValue& value, const UniValueType& typeExpected);
/*
  Check for expected keys/value types in an Object.
*/
void RPCTypeCheckObj(const UniValue& o,
    const std::map<std::string, UniValueType>& typesExpected,
    bool fAllowNull = false,
    bool fStrict = false);
/** Opaque base class for timers returned by NewTimerFunc.
 * This provides no methods at the moment, but makes sure that delete
 * cleans up the whole state.
 */
class RPCTimerBase
{
public:
    virtual ~RPCTimerBase() {}
};
/**
 * RPC timer "driver".
 */
class RPCTimerInterface