/**
 * Discord Bot DM client.
 *
 * Sends direct messages to a user via the Discord Bot API (REST only, no gateway).
 * Requires: bot token + user ID.
 */
export interface DiscordConfig {
    botToken: string;
    userId: string;
    channelId?: string;
}
/**
 * Open (or retrieve cached) DM channel with a user.
 * Returns the channel ID for sending messages.
 */
export declare function openDMChannel(config: DiscordConfig): Promise<string>;
/**
 * Send a DM to the configured user.
 * Automatically opens a DM channel if needed.
 */
export declare function sendDiscordDM(config: DiscordConfig, message: string): Promise<void>;
/**
 * Validate bot token by fetching bot user info.
 * Returns the bot's username if valid.
 */
export declare function validateBotToken(token: string): Promise<{
    valid: boolean;
    username: string;
}>;