@fedify/fedify/dist/retry-v_sGLH1d.mjs

An ActivityPub server framework

import { Temporal } from "@js-temporal/polyfill";
import "urlpattern-polyfill";
globalThis.addEventListener = () => {};
//#region src/federation/retry.ts
/**
* Creates an exponential backoff retry policy.  The delay between retries
* starts at the `initialDelay` and is multiplied by the `factor` for each
* subsequent retry, up to the `maxDelay`.  The policy will give up after
* `maxAttempts` attempts.  The actual delay is randomized to avoid
* synchronization (jitter).
* @param options The options for the policy.
* @returns The retry policy.
* @since 0.12.0
*/
function createExponentialBackoffPolicy(options = {}) {
	const initialDelay = Temporal.Duration.from(options.initialDelay ?? { seconds: 1 });
	const maxDelay = Temporal.Duration.from(options.maxDelay ?? { hours: 12 });
	const maxAttempts = options.maxAttempts ?? 10;
	const factor = options.factor ?? 2;
	const jitter = options.jitter ?? true;
	return ({ attempts }) => {
		if (attempts >= maxAttempts) return null;
		let milliseconds = initialDelay.total("millisecond");
		milliseconds *= factor ** attempts;
		if (jitter) {
			milliseconds *= 1 + Math.random();
			milliseconds = Math.round(milliseconds);
		}
		const delay = Temporal.Duration.from({ milliseconds });
		return Temporal.Duration.compare(delay, maxDelay) > 0 ? maxDelay : delay;
	};
}
//#endregion
export { createExponentialBackoffPolicy as t };