import { GetStorage } from "../../../src/storage";
/**
 * This is the doc comment for pallet `AuraExt`'s storages.
 *
 * `AuraExt`'s calls: {@link: module:pangolin/auraExt/calls}
 *
 * @module pangolin/auraExt/storages
 */
export declare const getAuraExt: (getStorage: GetStorage) => {
    /**
     * Serves as cache for the authorities.
     *
     * The authorities in AuRa are overwritten in `on_initialize` when we switch to a new session,
     * but we require the old authorities to verify the seal when validating a PoV. This will always
     * be updated to the latest AuRa authorities in `on_finalize`.
     *
     * @returns {Promise<string | null>} BoundedVec: Vec<[U8; 32]>
     */
    authorities: () => Promise<string | null>;
};