import type { PayloadViewerArtifactCacheV1 } from './types.js';
/** In-memory {@link PayloadViewerArtifactCacheV1} keyed by SHA-256. */
export declare class MemoryPayloadViewerArtifactCacheV1 implements PayloadViewerArtifactCacheV1 {
    private readonly artifacts;
    delete(sha256: string): Promise<void>;
    get(sha256: string): Promise<Uint8Array<ArrayBuffer> | undefined>;
    put(sha256: string, bytes: Uint8Array): Promise<void>;
}
/** Cache Storage-backed {@link PayloadViewerArtifactCacheV1} for browser environments. */
export declare class CacheStoragePayloadViewerArtifactCacheV1 implements PayloadViewerArtifactCacheV1 {
    private readonly cacheName;
    private readonly cacheStorage;
    constructor(cacheStorage?: CacheStorage, cacheName?: string);
    delete(sha256: string): Promise<void>;
    get(sha256: string): Promise<Uint8Array<ArrayBuffer> | undefined>;
    put(sha256: string, bytes: Uint8Array): Promise<void>;
    private request;
}
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