import { type ExtendResult, type LockOp } from "../../common/backend.js";
import type { RedisConfig } from "../types.js";
/** Redis client with eval and optional cached extendLock method */
interface RedisWithCommands {
    eval(script: string, numKeys: number, ...args: (string | number)[]): Promise<unknown>;
    extendLock?(lockIdKey: string, lockId: string, toleranceMs: string, ttlMs: string): Promise<[number, number] | number>;
}
/**
 * Creates extend operation that atomically renews lock TTL (replaces entirely, not additive).
 * @see docs/specs/redis-backend.md
 */
export declare function createExtendOperation(redis: RedisWithCommands, config: RedisConfig): (opts: LockOp & {
    ttlMs: number;
}) => Promise<ExtendResult>;
export {};