/** This bot's own learned union_id, or undefined if not yet echoed. */
export declare function getBotUnionId(dataDir: string, larkAppId: string): string | undefined;
/**
 * Persist a bot's own union_id learned from its message echo. Returns true iff
 * the store changed (first learn or a corrected value), so callers can log
 * exactly once. No-op on empty ids.
 */
export declare function recordBotUnionId(dataDir: string, larkAppId: string, unionId: string, now?: number): boolean;
/** A mention entry from a Lark message event (shape-tolerant subset). */
type MentionLike = {
    id?: {
        open_id?: string;
        union_id?: string;
    } | string;
};
/**
 * Learn our OWN union_id from a message's mentions[]: Lark stamps every
 * mentioned entity with its union_id. Matches self strictly by open_id（app_id
 * 形态的 mention 不带 union_id，无从学起，忽略）。Returns true iff the store
 * changed. Idempotent — safe to call on every event.
 */
export declare function recordBotUnionIdFromMentions(dataDir: string, larkAppId: string, selfOpenId: string | undefined, mentions: MentionLike[] | undefined, now?: number): boolean;
export {};
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