import type { DeadLetterJob, JobHandler, JobPayload, JobResult, QStashProviderConfig, QueueDeadLetterRecord, QueueProvider } from "../types";
/**
 * Get a registered handler by its composite key (`queue:type`).
 * Used by the QStash webhook verification middleware.
 */
export declare function getQStashHandler(queue: string, type: string): JobHandler | undefined;
/**
 * Get ALL registered handlers (for introspection / health checks).
 */
export declare function getQStashHandlerKeys(): string[];
export declare function toQStashDeadLetterJob(record: QueueDeadLetterRecord): DeadLetterJob | undefined;
export declare class QStashProvider implements QueueProvider {
    readonly name: "qstash";
    private client;
    private callbackBaseUrl;
    private token;
    private dlqEndpoint;
    private dlqFetcher;
    constructor(config: Omit<QStashProviderConfig, "provider">);
    enqueue(job: JobPayload): Promise<JobResult>;
    enqueueBatch(jobs: JobPayload[]): Promise<JobResult[]>;
    registerHandler<T extends Record<string, unknown>>(queue: string, type: string, handler: JobHandler<T>): void;
    getDeadLetteredJobs(queue?: string): Promise<DeadLetterJob[]>;
    close(): Promise<void>;
}
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