import type { FunctionThread, ModuleThread, StripAsync, Worker as WorkerType } from '../types/master.ts';
import type { WorkerFunction, WorkerModule } from '../types/worker.ts';
type ArbitraryWorkerInterface = WorkerFunction & WorkerModule<string> & {
    somekeythatisneverusedinproductioncode123: 'magicmarker123';
};
type ArbitraryThreadType = FunctionThread<any, any> & ModuleThread<any>;
export type ExposedToThreadType<Exposed extends WorkerFunction | WorkerModule<any>> = Exposed extends ArbitraryWorkerInterface ? ArbitraryThreadType : Exposed extends WorkerFunction ? FunctionThread<Parameters<Exposed>, StripAsync<ReturnType<Exposed>>> : Exposed extends WorkerModule<any> ? ModuleThread<Exposed> : never;
/**
 * Spawn a new thread. Takes a fresh worker instance, wraps it in a thin
 * abstraction layer to provide the transparent API and verifies that
 * the worker has initialized successfully.
 *
 * @param worker Instance of `Worker`. Either a web worker, `worker_threads` worker or `tiny-worker` worker.
 * @param [options]
 * @param [options.timeout] Init message timeout. Default: 10000 or set by environment variable.
 */
export declare function spawn<Exposed extends WorkerFunction | WorkerModule<any> = ArbitraryWorkerInterface>(worker: WorkerType, options?: {
    timeout?: number;
}): Promise<ExposedToThreadType<Exposed>>;
export {};
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