/**
 * Retry policy is provided with an attempt index and the latest error that
 * was the reason for the retry attempt. The policy can apply any delays
 * necessary, and must resolve with a boolean indicating whether further retry
 * attempts should be made.
 */
export type Retry = (context: RetryContext) => Promise<boolean>;
export interface RetryContext {
    /**
     * Current attempt index. Since retry policy is applied after retry attempts,
     * starts with 1 (attempt number 0 happens immediately).
     */
    attempt: number;
    /**
     * The latest error that was the reason for the retry attempt to be made.
     */
    latestError: any;
}
export declare const indefinitely: () => () => Promise<boolean>;
export interface ExponentialBackoffOptions {
    minDelayMs?: number;
    maxDelayMs?: number;
    maxAttempts?: number;
    factor?: number;
    jitter?: number;
}
/**
 * Retry policy that allows a specified maximum number of attempts, each with
 * an exponentially growing delay after an attempt.
 */
export declare const exponentialBackoff: ({ minDelayMs, maxDelayMs, maxAttempts, factor, jitter, }?: ExponentialBackoffOptions) => Retry;
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