enum MessageAck {
    "Received",
    "Seen",
    "Sent",
};

dictionary MessagePreview {
    string sender;
    string text;
    timestamp date;
    MessageAck ack;
};

dictionary Dialog {
    string id;
    string title;
    MessagePreview? lastMessage;
    boolean pinned;
};

namespace talaria {
    void initDatabase(string path);
    void initClient();
    boolean needLogin();
    u64 requestLoginCode(string phone);
    void signIn(u64 tokenPtr, string code);
    sequence<Dialog> getDialogs();
    void sendMessage(string packed, string text);
};