export interface ISmartMtaTextNamespace {
    prefix: string;
    maxBytes: number;
}
export declare const smartMtaTextNamespaces: readonly ISmartMtaTextNamespace[];
export declare function normalizeSmartMtaStorageKey(key: string): string;
export declare function getSmartMtaTextNamespace(key: string): ISmartMtaTextNamespace;
export declare function validateSmartMtaTextValue(key: string, value: string): void;
export declare function hashSmartMtaStorageKey(key: string): string;