import { Pipeline } from '../types';
interface RetryWhenOptions {
    /**
     * Maximum number of retries.
     *
     * @type {number}
     * @memberof RetryWhenOptions
     */
    readonly maxRetryAttempts?: number;
    /**
     * Timeout to wait between each retry.
     *
     * @type {number}
     * @memberof RetryWhenOptions
     */
    readonly scalingDuration?: number;
    /**
     * Custom error to throw if required.
     *
     * @type {Error}
     * @memberof RetryWhenOptions
     */
    readonly error?: Error;
}
/**
 *
 * This decorator tries to execute fnStep until condition is meet or maxRetryAttempts are tried.
 *
 *
 * @param {Pipeline.StepFunction<TIn,TOut>} fnStep step executed
 * @param {(result:any) => boolean} condition condition that when true stops the retry and returns the result of the pipeline
 * @param {RetryWhenOptions} options indicate custom values that overwrite the defaults for maxRetryAttempts (3), scalingDuration (10 ms) and error.
 * @returns {Pipeline.StepFunction<TIn,TOut>}
 */
export declare function retryWhen<TIn, TOut>(fnStep: Pipeline.StepFunction<TIn, TOut>, condition: (result?: any, i?: number) => boolean, options?: RetryWhenOptions): Pipeline.StepFunction<TIn, TOut>;
export {};
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