import { Module, ModuleOptions } from './index.js';
import { Circuit, CircuitFunction } from '../circuit.js';

type FallbackFunction = (...params: any[]) => any;
/**
 * Properties that customizes the fallback behavior.
 */
export declare abstract class FallbackOptions extends ModuleOptions {
    /**
     * The callback, called when the circuit rejects, can be used to reject another error.
     */
    callback: FallbackFunction;
}
/**
 * The Fallback Module, that allows to filter errors.
 */
export declare class Fallback extends Module {
    /**
     * The callback, called when the circuit rejects, can be used to reject another error.
     */
    callback: FallbackFunction;
    constructor(options?: FallbackOptions);
    execute<T>(circuit: Circuit, promise: CircuitFunction, ...params: any[]): Promise<T>;
    private _promiseFallback;
}
export {};