import type { Context, MiddlewareFn } from 'telegraf';
export type LogFn = (...args: unknown[]) => void;
export declare function parseAllowedChatIds(raw: string | undefined, log?: LogFn): Set<number>;
export declare function isChatAllowed(id: number, allowlist: ReadonlySet<number>): boolean;
export declare function createAllowlistMiddleware(allowedIds: Set<number>, log?: LogFn): MiddlewareFn<Context>;