import type { ReplyContext } from "../../shared/types.js";
export interface TelegramMessageLike {
    chat: {
        id: number;
        type: string;
    };
    message_id: number;
    from?: {
        id: number;
        username?: string;
        first_name?: string;
    };
    date?: number;
}
/** Derive a session key from a Telegram message. Format: `<prefix>:<chatId>`. */
export declare function deriveSessionKey(msg: TelegramMessageLike, prefix?: string): string;
/**
 * Build a reply context from a Telegram message.
 */
export declare function buildReplyContext(msg: TelegramMessageLike): ReplyContext;
/**
 * Check if a Telegram message predates the gateway boot time.
 * Telegram dates are Unix timestamps in seconds; bootTimeMs is in milliseconds.
 */
export declare function isOldTelegramMessage(date: number | undefined, bootTimeMs: number): boolean;
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