/**
 * https://github.com/nostr-protocol/nips/blob/master/94.md impl
 */
export declare class Nip94 {
    static parse(tags: Array<Array<string>>): Nip94Tags;
}
export interface Nip94Tags {
    url?: string;
    mimeType?: string;
    hash?: string;
    originalHash?: string;
    size?: number;
    dimensions?: [number, number];
    magnet?: string;
    blurHash?: string;
    thumb?: string;
    image?: Array<string>;
    summary?: string;
    alt?: string;
    fallback?: Array<string>;
    duration?: number;
    bitrate?: number;
}
/**
 * Read NIP-94 tags from event tags
 */
export declare function readNip94Tags(tags: Array<Array<string>>): Nip94Tags;
export declare function addExtensionToNip94Url(meta: Nip94Tags): string | undefined;
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