bruno / Bruno Garcia is on Nostr

Bitcoin dev

Last Notes

2025-10-06 17:26:30 UTC

I rewrote the mutation testing tool that I created for Bitcoin Core. It was originally written in Python but I got some issues that made me to rewrite it in Rust. It contains the same features as the original tool has:
- Generate mutants only for code touched in specific branches (useful for testing PRs)
- Skip useless mutants (comments, LogPrintf statements, etc.)
- One mutant per line mode for faster analysis
- Support for functional and unit test mutation
- Coverage-guided mutation testing
Check it out: https://github.com/brunoerg/bcore-mutation
We successfully migrated corecheck to use this new tool recently.

2025-05-16 19:56:59 UTC

New bugs/inconsistencies found by bitcoinfuzz: panic when parsing a PSBT on btcd, core lightning not validating pub keys in routing hints, overflow on lnd, and more…
Check the complete list in the README: https://github.com/bitcoinfuzz/bitcoinfuzz

2025-05-12 23:16:33 UTC

Just shilled this PR to the Floresta guys, interesting one!
https://bitcoincore.reviews/32317

2025-05-10 09:28:11 UTC

Maaaaaany advancements on bitcoinfuzz during these last months, I should write a blog post about it.

2025-05-10 09:27:07 UTC

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lol

2025-05-10 09:21:18 UTC

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Is this true? Can’t believe

2025-05-04 20:06:25 UTC

People should study more about the fork button on GH and the git cherry-pick command

2024-12-18 17:47:10 UTC

I spent some time rewriting bitcoinfuzz recently, it's better modularized and organized (note that v2 branch is the main one now). Also, I added a target for descriptor parse and here is one of the first finds:
https://github.com/brunoerg/bitcoinfuzz/issues/70

2024-12-10 21:56:09 UTC

Happy that my paper "Software testing for peer-to-peer systems: Challenges and the state-of-the-art" was accepted for publication at Journal of Software Engineering Research and Development. It took me a lot of time, but was worth it! excited to share the findings!

2024-09-04 22:59:19 UTC

Mullvad is really great, but I’m not using it to access X from 🇧🇷, ok gov??

2024-09-04 22:58:23 UTC

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That’s nice!

2024-08-31 12:54:20 UTC

🇧🇷🇧🇷🇧🇷🇧🇷

2024-03-19 12:58:14 UTC

Super grateful! Thanks @npub10pe…n34f for the support! Couldn’t be happier! #note1stn…jcux

2024-03-09 14:46:09 UTC

Some thoughts…
https://delvingbitcoin.org/t/property-based-testing-for-bitcoin-core/640

2024-03-04 15:33:56 UTC

Back here

2023-09-14 12:08:40 UTC

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🔥