import { DevCycleClient, DevCycleUser } from '@devcycle/js-client-sdk';
import { DevCycleNextOptions, DevCycleServerData } from '../common/types';
export declare const initialize: (sdkKey: string, clientSDKKey: string, userGetter: () => DevCycleUser | Promise<DevCycleUser>, options?: DevCycleNextOptions) => Promise<DevCycleServerData & {
    client: DevCycleClient;
}>;
export declare const validateSDKKey: (sdkKey: string, type: "server" | "client") => void;