export declare const XPSPACK_FORMAT_VERSION: 1;
export type XpspackCompression = 'none' | 'gzip' | 'brotli';
export interface XpspackEncryption {
    algorithm: 'AES-256-GCM';
    keyId: string;
    /** A unique 12-byte nonce encoded as unpadded base64url. */
    nonce: string;
}
export interface XpspackStoredEntry {
    id: string;
    path: string;
    sha256: string;
    storedBytes: number;
    uncompressedBytes: number;
    compression: XpspackCompression;
    encryption: XpspackEncryption | null;
}
export type XpspackChunk = XpspackStoredEntry;
export interface XpspackAsset extends XpspackStoredEntry {
    mediaType: string;
}
export interface XpspackManifestV1 {
    formatVersion: 1;
    packId: string;
    rootChunk: string;
    chunks: XpspackChunk[];
    assets: XpspackAsset[];
    signature: {
        algorithm: 'Ed25519';
        keyId: string;
        path: 'manifest.sig';
    } | null;
}
export interface XpspackChunkAad {
    algorithm: 'AES-256-GCM';
    compression: XpspackCompression;
    id: string;
    keyId: string;
    nonce: string;
    packId: string;
    path: string;
}
/** The exact UTF-8 bytes covered by an xpspack v1 Ed25519 signature. */
export declare const canonicalizeXpspackManifest: (manifest: XpspackManifestV1) => Uint8Array;
/** Canonical additional authenticated data for an encrypted xpspack chunk. */
export declare const canonicalizeXpspackChunkAad: (value: XpspackChunkAad) => Uint8Array;