export interface GetValidIdTokenOptions {
    serverIdToken: string;
    refreshTokenUrl: string;
    checkRevoked?: boolean;
}
export declare function getValidIdToken({ serverIdToken, refreshTokenUrl, checkRevoked }: GetValidIdTokenOptions): Promise<string | null>;
export interface GetValidCustomTokenOptions {
    serverCustomToken: string;
    refreshTokenUrl: string;
    checkRevoked?: boolean;
}
export declare function getValidCustomToken({ serverCustomToken, refreshTokenUrl, checkRevoked }: GetValidCustomTokenOptions): Promise<string | null>;