Co-creator of the Bleskomat next generation Bitcoin ATM hardware project. Created the PayNoWay double-spend app. Running bitcoin nodes, lightning nodes, and [… more] Electrum servers. Created and maintain lnurl-node, passport-lnurl-auth, and other lnurl-related open-source projects.
Lead author of the free Learning Bitcoin from the Command Line, the free #SmartCustody book on protecting your digital assets, and the SSL/TLS and Decentralized Identifier [… more] (DID) international standards. Executive Director/Principal Architect of Blockchain Commons and maintainer of many open source and blockchain infrastucture projects.
- Donate to Fitti⚡️
I’m a regular contributor to Bitcoin Core since August 2019. Mainly focused on reviewing PRs and improving code quality by adding/improving [… more] tests, clarifying documentation and various refactorings. Interested on second-layer solutions as well – started contributing to c-lightning in May 2020.
I’m a Bitcoin Core full time developer and maintainer. I discovered Bitcoin in 2011. My first Bitcoin Core contribution goes back [… more] to 2013. In total, I contributed over 30’000 lines of code in over 500 commits (at least twice as much was written but never made it to the master branch). I’m currently working on BIP324 - a p2p transport layer encryption as well as on a SPV mode for Bitcoin Core. Around 50% of my spent time goes into maintaining Bitcoin Core (reviewing, testing, commenting). I run bitcoinbuilds.org as well as the nightly gitian builds
- Donate to secondl1ght⚡️
My focus is improving bitcoin privacy. Right now I’m developing a CoinSwap implemention, aiming to massively improve bitcoin’s privacy and fungibility beyond [… more] anything seen before. I invented JoinMarket, the first widely-used Equal-Output CoinJoin implementation. I also focus on education and writing for the bitcoin wiki including the extensive Privacy wiki page. I also created Electrum Personal Server, aiming to be the easiest and most-efficent way to connect your Electrum wallet to your own full node, and in this way improving the user’s privacy and security.
Bitcoin Accessibility for the VISUALLY IMPAIRED and other special use cases • If you can donate a Braille Display please contact me directly!
I’ve been contributing to Bitcoin Core on a part-time basis since mid 2017. Most of my time is spent on reviewing [… more] and testing work by others, but I also created my own pull requests. Bitcoin ACKs provides a nice overview of my activity on the repo.Donate to Sjors
LN Offer (copy BOLT12 code)
I’m contributing to several free software projects, building the tools I want to use in order to defend my liberties. As these [… more] weapons of cyberspace are fundamentally non-scarce, I share my work free for anyone to use. My focus is on creating a second realm with a sound monetary economy in which sovereign individuals can pursue their entrepreneurial action.