import { TokenResult } from '@axinom/mosaic-id-utils';
/**
 * This function generates a long lived access token for a user token. It can be used to invoke long running processes.
 * @param authEndpoint URL for id-service authEndpoint.
 * @param serviceAccountToken A valid service account token with permission GENERATE_LONG_LIVED_TOKEN granted.
 * @param userAccessToken User access token to extend the validity period for.
 * @param validityDurationInSeconds Token expiration time in seconds. If not given, it will be defaulted to 2592000 (30 days).
 * @returns {TokenResult} Long lived access token.
 */
export declare const generateLongLivedToken: (authEndpoint: string, serviceAccountToken: string, userAccessToken: string, validityDurationInSeconds?: number) => Promise<TokenResult>;
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