/**
 * @module BackoffPolicy
 */
import { type BackoffPolicy, type DynamicBackoffPolicy } from "../../../backoff-policies/contracts/_module.js";
import { type ITimeSpan } from "../../../time-span/contracts/_module.js";
/**
 * Configuration for the constant backoff policy.
 * Each retry waits for the same fixed `delay`, optionally randomised by a jitter
 * factor to spread out thundering-herd retries across multiple clients.
 *
 * IMPORT_PATH: `"@daiso-tech/core/backoff-policies"`
 * @group Implementations
 * @group Implementations
 */
export type ConstantBackoffSettings = {
    /**
     * Fixed wait duration applied between every retry attempt.
     * @default
     * ```ts
     * import { TimeSpan } from "@daiso-tech/core/time-span";
     *
     * TimeSpan.fromSeconds(1)
     * ```
     */
    delay?: ITimeSpan;
    /**
     * Adds randomness to the delay to avoid thundering-herd effects.
     * Set to `null` to disable jitter.
     * @default 0.5
     */
    jitter?: number | null;
    /**
     * @internal
     * Should only be used for testing
     */
    _mathRandom?: () => number;
};
/**
 * @internal
 */
export declare function resolveConstantBackoffSettings(settings: ConstantBackoffSettings): Required<ConstantBackoffSettings>;
/**
 * Constant backoff policy with jitter
 *
 * IMPORT_PATH: `"@daiso-tech/core/backoff-policies"`
 * @group Implementations
 */
export declare function constantBackoff(settings?: DynamicBackoffPolicy<ConstantBackoffSettings>): BackoffPolicy;
/**
 * @internal
 */
export type SerializedConstantBackoffSettings = {
    delay?: number;
    jitter?: number | null;
    _mathRandom?: number;
};
/**
 * @internal
 */
export declare function serializeConstantBackoffSettings(settings: ConstantBackoffSettings): Required<SerializedConstantBackoffSettings>;