Every App Needs Bitcoin

Micropayments on the Internet have been theorized for decades. However, it wasn’t until the emergence of Nostr that we’ve finally seen them deployed at scale. Nostr is still in its infancy, yet we are already witnessing an explosion of apps built on top of this open protocol. And most of them are featuring zaps! With the recent Primal 2.1 release, Nostr developers now have the option to enhance the experience for their users by integrating a Nostr-powered bitcoin wallet. 

There is no doubt that micropayments add a new dimension to consumer apps. The incumbents have realized this and are rushing to add payments to their closed platforms. It won't be long before apps that don’t include built-in payments feel dated or outright broken. The question is not if apps of the future will have built-in payments, but what kind of payments they will be. Given that open networks have a tendency to win, our bet is that apps of the future will be powered by Bitcoin. Let’s see how Primal can help.

Primal Wallet

Our vision for Primal Wallet is simple: deliver the smoothest transactional bitcoin wallet, endowed with expert Nostr skills. The wallet leverages Nostr’s open social graph as a de facto public lightning directory, while offering the highest level of user experience for Nostr’s rich content. For example, the user can scroll through the transaction list, select a zap, and drill straight into the conversation thread where the zap originated. The whole flow feels perfectly natural.  Since we launched Primal Wallet in December 2023, the user response has been incredibly positive. People love the idea of being able to post something on Nostr, get zaps from plebs around the world, then buy a coffee or a meal with those sats - all from the same app. 

Having a bitcoin wallet with social skills resonated strongly with users, so Primal Wallet grew rapidly in popularity and usage. Since the launch, we have processed 1,338,460 transactions, with 238,916 just in the past month alone. This rivals some of the leading bitcoin wallets, and we are just getting started! We hear from many bitcoin OGs that they are using Primal Wallet as their transactional daily driver. Bullish. 

All this is great, but something has been missing. Our users demanded the ability to connect Primal Wallet to other Nostr apps, so they can zap from anywhere in Nostr’s growing ecosystem.

Zapping from Any Nostr App

For an existing Primal user, connecting the wallet to a new Nostr app can now be done in two clicks. Let’s take a look at how this is done from Olas, one of the most exciting new apps on Nostr:

Yes. Click, click. And you can start zapping! 

Such smooth integration of payments is not available in any competing technology stack. Tradfi, fintech, crypto, etc., have nothing on Bitcoin and Nostr. Two clicks and your external wallet is connected. I’ll give you a moment now to allow for this new reality to settle in.

Primal enables you to connect any number of external apps and manage them from wallet settings: Note that you can set your daily spend budget for each app or revoke its access at any time.

How This Works

So, what is this sorcery? How does it work under the hood?

Connecting Nostr apps to external wallets is accomplished via the Nostr Wallet Connect protocol. It utilizes Nostr’s public relay infrastructure to enable communication between apps and wallets. You can learn more about this protocol here, and access developer docs here.

The smooth, two-click connection setup UX is implemented through deep links between Primal and the external app. Here’s the deep link that the external app needs to call to invoke this feature: 

nostrnwc+primal://connect?appicon=[icon_url]&appname=[app_name]&callback=[callback_string]

After the user clicks “Create Wallet Connection” in Primal, the Primal app calls the deep link defined in the callback, and passes the NWC connection string. That's all that the external app needs to make the wallet connection.

What Comes Next?

The Nostr Wallet Connect protocol has been around for almost two years. Several bitcoin wallets implement it and many Nostr apps use it as their main way of enabling payments. What’s new with Primal 2.1 is the elevated user experience. Since Primal is a Nostr-powered wallet, it is aware of all the relevant metadata for each transaction: Nostr zaps, users, and the related events. Primal indexes the entire Nostr network, and now this is open to all Nostr apps that wish to integrate payments. 

Nostr keeps expanding and getting better. Its openness enables us to build capabilities that lift all boats. The future is bright; I can’t wait to see how things evolve from here. 🍿🍿🍿