import { JWE } from '@learncard/types';
export declare const CREDENTIAL_TTL: number;
export declare const getCredentialCacheKey: (id: string) => string;
export declare const getCachedCredentialById: (id: string) => Promise<JWE | null | undefined>;
export declare const getCachedCredentialsById: (ids: string[]) => Promise<(JWE | null | undefined)[]>;
export declare const setCredentialForId: (id: string, credential: JWE) => Promise<"OK" | undefined>;
export declare const deleteCredentialForId: (id: string) => Promise<number | undefined>;
