conn.go
func (c *Conn) SendRequestArr(method string, resHandler func(res *ResCtx) error, params ...interface{}) (reqID string, err error) {
	return c.SendRequest(method, params, resHandler)
}
func (c *Conn) SendRequestArr(method string, resHandler func(res *ResCtx) error, params ...interface{}) (reqID string, err error) {
	return c.SendRequest(method, params, resHandler)
}
// SendRequestArr sends a JSON-RPC request through the connection, with array params and auto generated request ID.
// resHandler is called when a response is returned.