flipperzero-firmware/applications/examples/example_plugins/plugin_interface.h

/**
 * @file plugin_interface.h
 * @brief Example plugin interface.
 *
 * Common interface between a plugin and host application
 */
#pragma once

#define PLUGIN_APP_ID "example_plugins"
#define PLUGIN_API_VERSION 1

typedef struct {
    const char* name;
    int (*method1)(void);
    int (*method2)(int, int);
} ExamplePlugin;