export interface Stop {
    (err?: Error): void;
}
export interface Retriable<T> {
    (stop: Stop, attempts: number, errors?: Array<Error>): Promise<T>;
}
export interface RetryOptions {
    retries?: number;
    factor?: number;
    minTimeout?: number;
    maxTimeout?: number;
    randomize?: boolean;
    onRetry?: (err: Error) => void;
}
export declare function retry<T>(retriable: Retriable<T>, opts?: RetryOptions): Promise<T>;