/**********************************************************
 * Copyright © 2023 Fict Ledger
 * All Rights Reserved.
 */
import { DEF_DELAY_MS } from "./delay.js";
export type TRetryFn<TResult> = () => Promise<TResult>;
export interface IShouldRetryFnParams {
    lastError: Error | null;
    nRetryAttempt: number;
    maxRetryAttempts: number;
}
export type TShouldRetryFn = (params: IShouldRetryFnParams) => boolean;
export type TOnErrFn = (err: unknown) => void | Promise<void>;
export declare const DEF_MAX_RECON_INT_MS = 60000;
export declare const DEF_MAX_RECON_ATTEMPTS: number;
export declare const DEF_SHOULD_RETRY_FN: TShouldRetryFn;
export interface IRetryOptions {
    delayMS: number;
    maxRetryIntervalMS: number;
    maxRetryAttempts: number;
    shouldRetryFn: TShouldRetryFn;
}
export declare const DefaultRetryOptions: IRetryOptions;
/**
 * Retries a promise-returning function until successfully resolved or
 * maxRetryAttempts are reached.
 * @template TResult
 * @param {TRetryFn<TResult>} Fn - Function to retry
 * @param {IRetryOptions} options - Retry configuration
 * @param {TOnErrFn} onError - Gets called every time the function errors, useful for logging purposes
 * @returns {Promise<TResult>} Promise that resolves if Fn succeeds within retry limits
 * @throws {Error} Last encountered error if retries are exhausted
 */
export declare function retryFn<TResult>(Fn: TRetryFn<TResult>, { delayMS, maxRetryIntervalMS, maxRetryAttempts, shouldRetryFn, }?: Partial<IRetryOptions>, onError?: TOnErrFn): Promise<TResult>;
export { DEF_DELAY_MS };
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