import { ApplyUpdateResponse, UpdateChannel, UpdateInfo } from "@mcoda/shared";
export declare class SystemClient {
    private baseUrl?;
    constructor(baseUrl?: string | undefined);
    private ensureBaseUrl;
    private fetchJson;
    checkUpdate(channel?: UpdateChannel): Promise<UpdateInfo>;
    applyUpdate(body?: {
        channel?: UpdateChannel;
    }): Promise<ApplyUpdateResponse>;
}
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