Introducing UmbraSet: Simplifying Bitcoin CoinJoin

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rogueapeNewbie
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#1Oct 4, 2025, 08:11 AM
Hey all, I'd like to share a cool project called UmbraSet. It's all about making Bitcoin CoinJoin easier to grasp. They've got thorough documentation and an interactive app for hands-on experience. The docs explain how CoinJoin works, privacy aspects, transaction flow, and how to use their implementation. And the app runs on Bitcoin Testnet, so you can do CoinJoin transactions for free with testnet coins. Super useful!
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rogueapeNewbie
Posts: 1 · Reputation: 16
#2Oct 4, 2025, 01:08 PM
So, there’s an update. The offline signer tool is now open source! This is the one that handles your private key when signing CoinJoin inputs. You can check it out on GitHub. They’ve made sure it’s secure and trustworthy too. Build checksums are done after rebuilding it twice, plus every release is signed. Your key stays on your device, only the signed transaction gets uploaded. Pretty solid to see this level of transparency. Don't trust blindly tho, always check signatures if you’re cautious.
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rogueapeNewbie
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#3Oct 4, 2025, 06:29 PM
Just dropped another update, they’ve added a developer API with interactive docs! Now, you can script with UmbraSet rather than just use the web interface. The REST API covers everything from creating to submitting CoinJoin transactions. You can manage transactions, look them up by status, even handle your own API keys from your account page. Still non-custodial and supports both testnet and mainnet! How cool is that?
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