import type { VoiceEmbedding, VoiceStore } from "./types.js";
export interface IndexedDbVoiceStoreOptions {
    /**
     * Database name, so applications can isolate voices per user or profile.
     *
     * @defaultValue "voxshot"
     */
    databaseName?: string;
}
/**
 * Voice store backed by IndexedDB, so cloned voices survive a page reload.
 *
 * Embedding vectors are stored as `Float32Array` values and go through the
 * structured clone algorithm untouched — no base64 round trip.
 */
export declare class IndexedDbVoiceStore implements VoiceStore {
    #private;
    constructor(options?: IndexedDbVoiceStoreOptions);
    /** Whether IndexedDB exists in this environment. */
    static isSupported(): boolean;
    save(name: string, embedding: VoiceEmbedding): Promise<void>;
    load(name: string): Promise<VoiceEmbedding | undefined>;
    list(): Promise<string[]>;
    delete(name: string): Promise<boolean>;
    clear(): Promise<void>;
    /** Close the underlying connection; the next call reopens it. */
    close(): Promise<void>;
}
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