Fedify: ActivityPub server framework's avatar

Fedify: ActivityPub server framework

@fedify@hollo.social

9 following1,147 followers

:fedify: Fedify is a TypeScript library for building federated server apps powered by ActivityPub and other standards, so-called fediverse. It aims to eliminate the complexity and redundant boilerplate code when building a federated server app, so that you can focus on your business logic and user experience.

Website

https://fedify.dev/

GitHub

https://github.com/fedify-dev/fedify

JSR

https://jsr.io/@fedify/fedify

npm

https://www.npmjs.com/package/@fedify/fedify

Pinned

Fedify: ActivityPub server framework
@fedify@hollo.social

🎉 Excited to announce that is now on Open Collective! Support the project's development starting at:

  • Backer (from $5/mo)
  • Supporter (from $25/mo)
  • Sponsor (from $100/mo)
  • Corporate Sponsor (from $500/mo)
  • Custom donations welcome

Your support will help us maintain and improve Fedify. Check it out here:

https://opencollective.com/fedify

:fedify:

Fedify's Open Collective page showing the project logo, description as “A TypeScript library for building federated server apps powered by ActivityPub and other standards”, and five contribution tiers starting from $5/month Backer to $500/month Corporate Sponsor, with custom contribution options available.
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Fedify's Open Collective page showing the project logo, description as “A TypeScript library for building federated server apps powered by ActivityPub and other standards”, and five contribution tiers starting from $5/month Backer to $500/month Corporate Sponsor, with custom contribution options available.

Pinned

Fedify: ActivityPub server framework
@fedify@hollo.social

Fedify is an server framework in & . It aims to eliminate the complexity and redundant boilerplate code when building a federated server app, so that you can focus on your business logic and user experience.

The key features it provides currently are:

If you're curious, take a look at the website! There's comprehensive docs, a demo, a tutorial, example code, and more:

https://fedify.dev/

Darius Kazemi
@darius@friend.camp

Damn... Fedify is really good. It seems like the ActivityPub library I always wanted for Node applications (rather than a reference server like the one I created for ExpressJS).

I love that it's built so you can take an existing app and quickly drop in the federation features you need (like oh okay I need my application to Follow/Accept/Reject/Undo and have the ability to Create an Article but that's it, cool, Fedify has me covered)

fedify.dev/tutorial/basics

洪 民憙 (Hong Minhee)
@hongminhee@fosstodon.org · Reply to 洪 民憙 (Hong Minhee)

One of the benefits of is that you don't have to worry about whether a property of an Activity Vocabulary object has a URL or embeds an actual object. If you need an object, you can call the `getObject()` method (which will fetch a remote object if necessary). If you need a URI, you can access the `objectId` property.

fedify.dev/manual/vocab#object

Fedify: ActivityPub server framework
@fedify@hollo.social

We've applied Twoslash to the Fedify docs to show type information as tooltips in TypeScript example code—check it out now!

https://fosstodon.org/@hongminhee/113134894222177741

The mouse cursor is hovering over a method in the example code, and information about that API pops up as a tooltip.
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The mouse cursor is hovering over a method in the example code, and information about that API pops up as a tooltip.

洪 民憙 (Hong Minhee)
@hongminhee@fosstodon.org

I'm applying to the docs. It works like magic! When I'm done, the Fedify docs will be even easier to read the example code than they are now.

The mouse cursor is hovering over a method in the example code, and information about that API pops up as a tooltip.
ALT text

The mouse cursor is hovering over a method in the example code, and information about that API pops up as a tooltip.

洪 民憙（ホン・ミンヒ）
@hongminhee@fedibird.com

次のバージョンのFedifyはLinked Data Signatures (RsaSignature2017)に対応します。つまり、Mastodonが他のサーバーからフォワードしたアクティビティをFedifyが検証出来る様になります。

また、Context.sendActivity()メソッドで送信するアクティビティは、RSA-PKCS#1-v1.5の鍵ペアが一つでも有る場合、HTTP Signaturesに加え、Linked Data Signaturesが添付されます。

すでに廃止された標準であるLinked Data Signaturesを実装するのは気が進まなかったのですが、この変更がFedifyアプリのより良い互換性と相互運用性の基礎になる事を願っています。
QT: hollo.social/@fedify/0191ec91- [参照]

Fedify: ActivityPub server framework
@fedify@hollo.social

The next version of will support (), which means that Fedify will be able to verify activities forwarded by from other servers.

In addition, activities sent with the Context.sendActivity() method will have Linked Data Signatures attached in addition to HTTP Signatures if any RSA-PKCS-v1.5 key pairs are present.

We were not motivated by implementing Linked Data Signatures, which is already an outdated standard, but we hope this change will lead to better compatibility and interoperability of Fedify apps!

Fedify: ActivityPub server framework
@fedify@hollo.social

The next version of will support (), which means that Fedify will be able to verify activities forwarded by from other servers.

In addition, activities sent with the Context.sendActivity() method will have Linked Data Signatures attached in addition to HTTP Signatures if any RSA-PKCS-v1.5 key pairs are present.

We were not motivated by implementing Linked Data Signatures, which is already an outdated standard, but we hope this change will lead to better compatibility and interoperability of Fedify apps!

洪 民憙 (Hong Minhee)
@hongminhee@fosstodon.org

Working on @fedify's docs about … I hope someday drop the support for Linked Data Signatures… 😇

The combination of HTTP Signatures and Linked Data Signatures is the most widely supported way to sign activities in the fediverse, as of September 2024. Despite Linked Data Signatures is outdated and not recommended for new implementations, it is still widely used in the fediverse due to Mastodon and other major implementations' reliance on it. However, for new implementations, you should consider using both Object Integrity Proofs and Linked Data Signatures for maximum compatibility and future-proofing.
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The combination of HTTP Signatures and Linked Data Signatures is the most widely supported way to sign activities in the fediverse, as of September 2024. Despite Linked Data Signatures is outdated and not recommended for new implementations, it is still widely used in the fediverse due to Mastodon and other major implementations' reliance on it. However, for new implementations, you should consider using both Object Integrity Proofs and Linked Data Signatures for maximum compatibility and future-proofing.

Fedify: ActivityPub server framework
@fedify@hollo.social

Fedify, an server framework, has released v0.15.0! The key changes include:

It is now available in JSR and npm.

Antolius
@antolius@mastodon.social · Reply to Fedify: ActivityPub server framework

@fedify this is incredibly helpful! I went into it with some beforehand knowledge & it was still useful.

The structure & flow are great, it's telling a story & leading the reader through it. The tips alone make it worth a read. I love how detailed it is, covering everything from database to frontend. On the other hand, every lib/tool is well & succinctly explained which makes it easy to swap out with an alternative. The prompts for improvements at the end are great.

⭐⭐⭐⭐⭐, will read again.

洪 民憙 (Hong Minhee)
@hongminhee@lemmy.ml · Reply to kopper [they/them]

Thank you for your advice. As you mentioned, Fedify currently has actor URIs consisting of handles. This limitation is due to the early design of Fedify and will be fixed before we release v1.0!