import type { KangarooMessageTypes } from '../messages.types';
export type privilegeString = `${keyof privileges}:${string}`;
export type privileges = {
    additional?: Array<string>;
    create?: Array<string>;
    read?: Array<string>;
    update?: Array<string>;
    delete?: Array<string>;
};
export type extension = {
    baseUrl: string;
    permissions: privileges;
};
export declare function sendPrivileged(messageType: keyof KangarooMessageTypes): Array<privilegeString> | null;
export declare function handlePrivileged(messageType: keyof KangarooMessageTypes, origin: string): Array<privilegeString> | null;
export declare function findExtensionByBaseUrl(baseUrl: string): extension | undefined;