import { Context, Crypto } from '@launchdarkly/js-sdk-common';
export type Namespace = 'LaunchDarkly' | 'AnonymousKeys' | 'ContextKeys' | 'ContextIndex';
export declare function concatNamespacesAndValues(parts: {
    value: Namespace | string;
    transform: (value: string) => Promise<string>;
}[]): Promise<string>;
export declare function namespaceForEnvironment(crypto: Crypto, sdkKey: string): Promise<string>;
/**
 * @deprecated Used only for migration in ensureKey. Data stored under LaunchDarkly_AnonymousKeys
 * is now migrated to LaunchDarkly_ContextKeys on first access. This function can be removed once
 * all clients have had the chance to run the migration.
 */
export declare function namespaceForAnonymousGeneratedContextKey(kind: string): Promise<string>;
export declare function namespaceForGeneratedContextKey(kind: string): Promise<string>;
export declare function namespaceForContextIndex(environmentNamespace: string): Promise<string>;
export declare function namespaceForContextData(crypto: Crypto, environmentNamespace: string, context: Context): Promise<string>;
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