Greetings Hackers!
Post your hackathon project as a reply in this thread! Whoever has the most sats by the end of the day will win the "Community Favorite" prize!
Please use the following format:
## [Project Name]
### Team:
• [Name 1] – [GitHub/Twitter/Nostr/etc.]
• [Name 2] – [GitHub/Twitter/Nostr/etc.]
• [Add more if needed]
### What We Built (1–3 sentences):
[Clear, direct description of your project. Include screenshots / videos if relevant]
### Stack:
[Bitcoin layer/primitives used, frameworks, languages, tools.]
### Submission:
[Link to loot submission]
### Repo:
[Link to GitHub/GitLab/etc.]
### Next Steps:
[What you’re improving, shipping next, or help you’re looking for.]
FYI the
###headings only work in posts. for comments using boldface is the replacement, or maybe nesting bulletsMinesploitMinesploit
Team:Team:
What We Built:What We Built:
Security research framework for Bitcoin mining infrastructure. Hypothesis-first design: spin up a Stratum server, connect a real CPU miner, test your attack.
Example:
pool = StratumServer().start(); miner = CPUMiner(pool=pool).start();— now you're mining with real hashrate, ready to test your hypothesis.While stress-testing Stratum V2 we found an interesting bug regarding share accounting (responsible disclosure in progress 👀).
Stack:Stack:
Repo:Repo:
https://github.com/johnnyasantoss/minesploit
Next Steps:Next Steps:
Signal21Signal21
Team:Team:
What We Built:What We Built:
The exploit at bitcoin++ isn't code — it's your calendar. The 40HPW meme exists because the Bitcoin rabbit hole is real: podcasts, YouTube channels, meetup streams, RSS feeds. Signal21 exploits that exploit back. Configure your sources and topics once, pay 21 sats, and get a single AI-synthesized audio briefing — deduplicated, filtered to what you actually care about, streaming to your browser before it's even done generating. Time is the only non-renewable resource. We built the reclaim button.
Stack:Stack:
Submission:Submission:
https://loot.fund/hackathons/bitcoin-exploits-edition/application/create/new
Repo:Repo:
https://github.com/murdawkmedia/signal21
Next Steps:Next Steps:
looks like you and @murdawkmedia posted the same thing?
oh dang - double post. embarassing.
EnergySatsEnergySats
Team:Team:
• majoal0 – @majoal0What We Built (1–3 sentences):What We Built (1–3 sentences):
I built functional prototype that turns hotel and Airbnb energy savings into real Bitcoin. Guests earn satoshis for every appliance they keep off during their stay — paid out instantly via Lightning Network at check-out.
When a guest checks in through the app, a real-time energy savings meter starts running. Every appliance they choose to keep off — air conditioner, electric shower, TV, refrigerator — generates satoshis credited to their in-app balance.
At check-out, the guest withdraws their earned satoshis instantly via a Lightning Network payment — either by scanning a QR code from their wallet or pasting a BOLT11 invoice.
Stack:Stack:
Submission:Submission:
https://loot.fund/hackathons/bitcoin-exploits-edition/applications/24
Repo:Repo:
https://github.com/majoal0/EnergySats/
Next Steps:Next Steps:
I'm planning to support native Airbnb integration and IAMMETER. This way I'll have a scalable solution and production-ready product.
This is a pretty cool idea! I used to run an air bnb and I always hated it when people would leave the heater running even though they were out all day. Definitely saw it in my power bill. A way to incentivize them to pay attention would have been awesome!
So far this is a really cool idea
I like it simply for not using AI
Stealth — Bitcoin Wallet Privacy AnalyzerStealth — Bitcoin Wallet Privacy Analyzer
Team:Team:
• Breno Brito - https://github.com/brenorb - https://twitter.com/brenorb - brenorb@zaps.lol • LordBabuino - npub1dkpmrtcuqlngclt27ftd8yec3vrmmxsehkvq2l6uns64w4q656rqapwlwd - jorge.x7@gmail.com - x.com/JorgeSantanaDev • Miranda - https://x.com/_hsmiranda - https://github.com/hsmiranda - https://nosta.me/35f80bdae3821a833935fa43c4bdc41d34ff9e5695f6ae3fbb35d0d2406855c0 • Renato Britto - x.com/natobrittoWhat We Built (1–3 sentences):What We Built (1–3 sentences):
Stealth is a local, read-only privacy auditor for Bitcoin wallets that analyzes UTXOs and detects privacy vulnerabilities such as address reuse, clustering signals, dust linkage, and exchange-origin fingerprints. It surfaces institutional-grade privacy insights directly to users without requiring private keys or sending data to third parties. Users can import a descriptor and immediately see where and how their privacy is exposed, along with actionable recommendations on how to improve their privacy.
Stack:Stack:
Bitcoin primitives: descriptors, UTXOs, transaction graph analysis
Backend: Java, Python, Quartus
Frontend: React, TypeScript
Node integration: Bitcoin node backend
Architecture: local-first, read-only privacy analysis engine
Landing page: Shakespeare
Submission:Submission:
https://loot.fund/hackathons/bitcoin-exploits-edition/applications/8
Repo:Repo:
https://github.com/LORDBABUINO/stealth
Next Steps:Next Steps:
This seems like a very useful concept. I'm curious about how the age spread and behavioral fingerprint work. Cool to see people working on stuff like this.
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