import { Querable } from "../../../lib/common-libs/querable";
/*********
 *
 * PoW worker
 * ----------
 *
 * Its model is super simple: we ask him to find a proof, and we can wait for it.
 * Eventually, we can tell him to cancel his proof, which makes it answer `null` as proof value.
 *
 * The worker also provides two properties:
 *
 * - `worker.online`: a promise which is resolved when the worker gets « online » for the first time
 * - `worker.exit`: a promise which is resolved when the worker exits (which occurs when the worker is being closed or killed)
 *
 ********/
export declare class PowWorker {
    private nodejsWorker;
    private onPowMessage;
    private onlineHandler;
    private exitHandler;
    private onlinePromise;
    private onlineResolver;
    private exitPromise;
    private exitResolver;
    private proofPromise;
    private proofResolver;
    private messageHandler;
    constructor(nodejsWorker: any, onPowMessage: (message: any) => void, onlineHandler: () => void, exitHandler: (code: any, signal: any) => void);
    get online(): Promise<void>;
    get exited(): Promise<void>;
    get pid(): any;
    askProof(commandMessage: {
        uuid: string;
        command: string;
        value: any;
    }): Querable<{
        message: {
            answer: any;
        };
    } | null>;
    sendConf(confMessage: {
        rootPath: string;
        command: string;
        value: any;
    }): void;
    sendCancel(): void;
    kill(): void;
}