import PQueue from 'p-queue';
type Queue = InstanceType<typeof PQueue>;
export declare class UserQueues {
    main: Queue;
    queues: Map<string, Queue>;
    constructor(concurrency: number);
    addToUser(did: string, task: () => Promise<void>): Promise<void>;
    private getQueue;
    onEmpty(): Promise<void>;
    processAll(): Promise<void>;
    destroy(): Promise<void>;
}
export {};
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