import type { ShareLinkPreview } from '../share-link-preview.js';
export declare function sharePreviewAccountKey(): string;
export declare class SharePreviewClient {
    private readonly read;
    private cache;
    private jobs;
    private queue;
    private active;
    private scope;
    constructor(read?: (url: string, signal: AbortSignal) => Promise<ShareLinkPreview | null>);
    setScope(scope: string): void;
    acquire(scope: string, url: string): {
        promise: Promise<ShareLinkPreview | null>;
        release: () => void;
    };
    private pump;
}
export declare const sharePreviewClient: SharePreviewClient;
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