examples/components/routing/fidl/echo.fidl

// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// [START fidl_echo]
library fidl.examples.routing.echo;

const MAX_STRING_LENGTH uint64 = 64;

@discoverable
closed protocol Echo {
    /// Returns the input.
    strict EchoString(struct {
        value string:<MAX_STRING_LENGTH, optional>;
    }) -> (struct {
        response string:<MAX_STRING_LENGTH, optional>;
    });
};
// [END fidl_echo]