import { SupplierPromise } from "../types";
import { RetryOptions } from "./RetryOptions";
/**
 * Retries the `supplier` when `errorEquals` returns `true` by waiting `intervalMilliseconds` (`i`) multiplied by the
 * `backOffRate` (`b`) to the power of the number of `attempts` (`a`) (i.e., `i * b ^ a`) made until the `maxAttempts`
 * is reached. For a fully failed example with defaults,
 *
 * 1. Executes `supplier` and fails.
 * 2. Retry after 1 second (1 * 2 ^ 0) and fails.
 * 3. Retry after 2 seconds (1 * 2 ^ 1) and fails.
 * 4. Retry after 4 seconds (1 * 2 ^ 2) and fails.
 * 5. Rejects with failure.
 *
 * @param options - Retry parameters.
 * @returns The result of the `supplier`.
 */
export declare function retry<T, E>(supplier: SupplierPromise<T>, options?: RetryOptions<E>): Promise<T>;