import { BautaJSInstance, Context, GenericError, Pipeline } from '../types';
export type StepFunctionCallback<TIn, TOut> = (prev: TIn, ctx: Context, bautajs: BautaJSInstance, callback: (err: GenericError, val: TOut) => void) => void;
/**
 * Allow you to use a callback style async operation
 * @export
 * @template TIn
 * @template TOut
 * @param {StepFunctionCallback<TIn, TOut>} fn
 * @returns {Pipeline.StepFunction<TIn, TOut>}
 * @example
 * const { asPromise } = require('@batuajs/core');
 *
 * operations.v1.op1.setup(asPromise((_, ctx, batuajs, done) => {
 *  done(null, 'hey')
 * }))
 */
export declare function asPromise<TIn, TOut>(fn: StepFunctionCallback<TIn, TOut>): Pipeline.StepFunction<TIn, Promise<TOut>>;
export default asPromise;
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