---
title: Changelog
description: Product changes to @sigil/core that affect how you use the library.
url: https://pr-1-10d18e06d3bf.thally.app/changelog
---

# Changelog

Product changes to @sigil/core that affect how you use the library.

## 0.1.0

Initial release.

- `sign`, `computeSignature`, and `signingPayload` for producing a
  `Sigil-Signature` header.
- `verify` and `verifyResult` for checking a signature, with a 300-second
  default tolerance window and constant-time digest comparison.
- `parseHeader` and `formatHeader` for the `t=…,v1=…` wire format, including
  multi-signature headers for key rotation.
- `constructEvent` for verifying a request and decoding its JSON body in one
  call, with the new error code `payload_not_json`.
- `nextDelayMs`, `retrySchedule`, and `totalRetryWindowMs` for the delivery
  retry policy, with optional jitter and an injectable random source.