export interface WorkerInput<IN = any> {
    /**
     * Index of the chunk received (global), which identifies the message. Starts with 0.
     */
    index: number;
    /**
     * Input chunk data.
     */
    payload: IN;
}
export interface WorkerOutput<OUT = any> {
    /**
     * Index of the chunk received (global), which identifies the message. Starts with 0.
     */
    index: number;
    /**
     * Output of the worker.
     */
    payload: OUT;
    /**
     * Returned if WorkerClass.process returned an error (rejected Promise).
     * Payload is undefined in such case, so error should be checked first.
     */
    error?: Error;
}
export interface BaseWorkerData {
    workerFile: string;
    /**
     * @default worker
     */
    metric: string;
    workerIndex: number;
    /**
     * @default 1000
     */
    logEvery: number;
}