export type AmbientVaryScheme = 'env';
export declare function isAmbientVaryScheme(scheme: string): scheme is AmbientVaryScheme;
export declare function readAmbientVaryValue(scheme: AmbientVaryScheme, name: string): string | undefined;
export type CacheVaryDim = {
    scheme: string;
    name: string;
};
export interface EmbeddedVaryDim extends CacheVaryDim {
    fp: string;
}
export declare function currentFingerprint(scheme: string, name: string): Promise<string | null>;
export declare function embedCurrentFingerprints(dims: readonly CacheVaryDim[] | undefined): Promise<EmbeddedVaryDim[] | undefined>;
export declare const dimId: (dim: CacheVaryDim) => string;
export declare function canonicalDimNames(dims: readonly CacheVaryDim[]): string;
export declare function canonicalDims(dims: readonly EmbeddedVaryDim[]): string;