import { MonoTypeOperatorFunction } from 'rxjs';
/**
 * The options object that can be passed to `retryWithBackoff`
 */
export interface RetryWithBackoff {
    retries: number;
    delayCalculator: (attempt: number) => number;
}
/**
 * Return the difference in time in words
 *
 * @param options - The options object
 *   - `retries`: How many times it should retry before throwing an error
 *   - `delayCalculator`: The calculator to determine the delay timing
 * @returns The observable timer
 *
 * @example
 * return this.exampleDatabase.getSomething()
 *   .pipe(
 *     map((res: MyResponse) => {
 *       if (res) {
 *         return res;
 *       } else {
 *         return null;
 *       }
 *     }),
 *     retryWithBackoff({}), // Using default options
 *   )
 * ;
 */
export declare const retryWithBackoff: <T>({ retries, delayCalculator, }: Partial<RetryWithBackoff>) => MonoTypeOperatorFunction<T>;