// client

int zaprus_init(void);

int zaprus_deinit(void);

int zaprus_send_relay(const char* payload, usize len, char[4] dest);

int zaprus_send_initial_connection(const char* payload, usize len, uint16_t initial_port);

struct SaprusMessage* zaprus_connect(const char* payload, usize len);

// message
struct SaprusMessage {
  
};

// ptr should be freed by the caller.
int zaprus_message_to_bytes(struct SaprusMessage msg, char** ptr, usize* len);

// Return value should be destroyed with zaprus_message_deinit.
struct SaprusMessage* zaprus_message_from_bytes(const char* bytes, usize len);

void zaprus_message_deinit(struct SaprusMessage* msg);