export interface StrategyOptions {
    exceptions: string[];
    maxAttempts?: number;
    handleErr?: (err: any) => void;
}
export interface CalculateTimeout {
    (attempt: number): number;
}
export interface Strategy {
    (err: any, attempt: number, cback: (err?: any) => void): void;
}
interface Factory {
    (calculateTimeout: CalculateTimeout, options: StrategyOptions): Strategy;
}
declare const factory: Factory;
export default factory;