import { Platform } from '@launchdarkly/js-sdk-common';
/**
 * This function will retrieve a previously generated key for the given {@link storageKey} if it
 * exists or generate and store one on the fly if it does not already exist.
 * @param storageKey keyed storage location where the generated key should live.  See {@link namespaceForGeneratedContextKey}
 * for related exmaples of generating a storage key and usage.
 * @param platform crypto and storage implementations for necessary operations
 * @param legacyStorageKey optional legacy storage key to migrate from. If the key is not found
 * under {@link storageKey} but exists under this legacy key, it will be migrated to the new
 * location and the legacy key will be cleared.
 * @returns the generated key
 */
export declare const getOrGenerateKey: (storageKey: string, { crypto, storage }: Platform, legacyStorageKey?: string) => Promise<string>;
//# sourceMappingURL=getOrGenerateKey.d.ts.map