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
 * @returns the generated key
 */
export declare const getOrGenerateKey: (storageKey: string, { crypto, storage }: Platform) => Promise<string>;
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