Code Orange Dev School

Asia’s Bitcoiner School #npub1gxqyeea3xspkd68mxlxsvvk3gdzdd555u504ynwpdj0ghg503mvq2gydt0

[Code Orange Dev School @CodeOrangeDevs]

Join us tonight to discuss how bitcoin + vibe coding allow bitcoiners to increase their productivity.

@andywong311 and @mwihotii will present their projects. Anyone else would like to showcase what they are working on? Drop the links below.

[Razor @Razor_gh]

Today at @CodeOrangeDevs Privacy Track we looked at Payjoin v2.

- How is negotiation done between the sender and receiver?
- What does the payjoin P2EP address encode?
- Can I lose my btc if the Directory and OHTTP relay are controlled by an attacker?

[Captain Levi @sidharth_2k04]

the sentence:

"atleast 5% of private payments in bitcoin keeps the entire chain alive"
by @keypleb is the highlight!

great event by @Razor_gh who cleared all major doubts about @payjoindevkit

[Bitshala @bitshala_org]

The BOSS Summit Winter 2026 schedule is LIVE. 🟠

From 26th to 31st October, @bitshala_org will be in Jaipur for our winter summit, bringing builders together for a week of learning, conversations, and working on the things that matter to our future.

And we’ve made room for 10 additional people to join the BOSS sessions.

If you’re a developer, FOSS contributor, or Bitcoin builder looking to find your people, this is for you.

🧵 Here’s what’s planned
🔗 Full details: https://t.co/yhwheLzE42✨

[andywong31 @andywong311]

@CodeOrangeDevs @payjoindevkit @realalexxie @0xhusteem @micah_shallom01 @Yemihazan @sidharth_2k04 @Kelly__musk @clearmined1 i really enjoyed the session. learned new things like how to do private transactions. kudos to @Razor_gh for a wonderful presentation. looking forward to the next one brother!

[Code Orange Dev School @CodeOrangeDevs]

Then came the hands-on testing with @cakewallet and @BULLBITCOIN_

We encountered failed attempts, unclear errors, and compatibility questions. Lots of work to do for devs here at Code Orange!

Useful feedback for any payment app - tell people what’s happening and why it failed, so it can work later.

See you at the next workshop! We will cover Silent Payments next.

[Code Orange Dev School @CodeOrangeDevs]

18 bitcoiners learning about @payjoindevkit at our Privacy Track today.

Some attempts hit errors. That gave us plenty to chat about - how Payjoin works, what privacy it offers, and what proof of work we still need to do.

Full recording below. Here are a few takeaways:

[Code Orange Dev School @CodeOrangeDevs]

@Razor_gh walked us through Payjoin v1 and v2, including how payments are coordinated using encrypted messages, a mailbox directory, and Oblivious HTTP relays.

We also asked what those services can see—and where trust assumptions remain.

[nifty, ideas guy @niftynei]

🇰🇷 we're going dark in Seoul in 2 weeks -- you won't want to miss this!

[Code Orange Dev School @CodeOrangeDevs]

@callebtc @skot9000 Thank you for defending our privacy

[Code Orange Dev School @CodeOrangeDevs]

Join us tomorrow to continue learning about @payjoindevkit and how to start contributing. Hosted by @Razor_gh

We will give out some payjoined bitcoin to those who provide a Payjoin address! Book in your calendars: https://t.co/5R8sOnUNgL

[Code Orange Dev School @CodeOrangeDevs]

Video recording of today's Privacy Track session: Payjoin hosted by @Razor_gh

We covered:
- Common input heuristic
- Change output detection
- How @payjoindevkit hides two possible scenarios
- Coinjoin vs Payjoin
- Why Payjoin is hard to design (UTXO snooping)
- What is a PSBT

Links below:

[andywong31 @andywong311]

@blockchainchick i just recently did an online workshop about this at @CodeOrangeDevs. its a good setup for people to be aware of. multi-vendor multi-sig for the win! 🔥

[Code Orange Dev School @CodeOrangeDevs]

@DigitalLife25 @andywong311 @nunchuk_io @0xhusteem @micah_shallom01 @Kelly__musk DIY on Sparrow is a bit more complex as you need to save wallet descriptors and derivation paths yourself safely. @nunchuk_io makes it streamlined and easier.

[Code Orange Dev School @CodeOrangeDevs]

Can you sleep well at night with your singlesig?

In today's Self-Custody Workshop, @andywong311 built a 2-of-3 multisig live with three different vendors. We used Sparrow to setup and @nunchuk_io to recover the wallet.

[Code Orange Dev School @CodeOrangeDevs]

@bitshala_org We have noticed the price action is correlated with the number of attendees. Those who come during the bear markets are the real ones!

[Code Orange Dev School @CodeOrangeDevs]

@Kelly__musk Simple

[Code Orange Dev School @CodeOrangeDevs]

https://t.co/2t2qBjbIT8

[Code Orange Dev School @CodeOrangeDevs]

@PupusasG Every small thing counts!

[Code Orange Dev School @CodeOrangeDevs]

@0xhusteem Next session is next week - Privacy Track 🙂‍↕️ https://t.co/tf8wAnmIna

[Code Orange Dev School @CodeOrangeDevs]

@micah_shallom01 @andywong311 @nunchuk_io @0xhusteem @Kelly__musk Andy knows advanced self-custody so well