Passionate about #bitcoin (Core contributor since 2019), nature, OpenBSD, books, bass, beer & chess 🏞️ PGP: 6A8F 9C26 6528 E25A EB1D 7731 C237 1D91 CB71 6EA7
Vienna
Joined March 2009
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Sebastian 🟩🥕@theStack
Aug 3Austria
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🤫
Sebastian 🟩🥕@theStack
Jul 26Austria
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jlest01, @n1ckler, @LLFOURN, @L0RINC, macgyver13, nymius, @real_or_random, sipa, @provoost, @SomsenRuben, @Sosthene___, @spherostrat, @theuni, w0xlt. 🙏
Sebastian 🟩🥕@theStack
Jul 26Austria
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Over the years, this effort was driven primarily by BIP-352 author @josibake. Huge kudos! 👏🫡 Thanks to everyone who helped make this happen, whether through PR reviews or conceptual discussions:
@achow101, @andrew_s_toth, antonilol, @brrrunog, @craigraw, Eunovo, @fjahr, furszy,
Sebastian 🟩🥕@theStack
Jul 26Austria
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2 and 1/2 years, 5 PR takes, 1284 review comments, 1 protocol change and countless force-pushes and CI runs later, we made it to the finish line and the Silent Payments (BIP-352) module has finally landed in libsecp256k1! 🤫🎉
#1471 → #1519 → #1698 → #1765 🏁✅(→ #1792 🏷️⛔)
JUST IN: Silent Payments crypto functions are merged into libsecp256k1, bringing the private payment address scheme one step closer to shipping in bitcoin-core
github.com/bitcoin-core/secp…
Sebastian 🟩🥕@theStack
4 Dec 2025Austria
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Nice, congrats @andrew_s_toth 🎉
Sebastian 🟩🥕@theStack
16 Oct 2025Austria
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Running libbitcoinkernel.
Sebastian 🟩🥕@theStack
12 Jan 2025Austria
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Cool! 👍 For determining A, instead of summing up the individual pubkeys the sender side can alternatively also just calculate a*G (that's what we do in the current proposal of the secp256k1 module, see github.com/bitcoin-core/secp…), but that's of course an implementation detail.
Sebastian 🟩🥕@theStack
26 Nov 2024Austria
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as a lispy warmup for the upcoming advent of code, did an old day1 exercise in Guile Scheme (how hard can it be?) and almost went insane😱xkcd.com/297/
Sebastian 🟩🥕@theStack
30 Oct 2024Austria
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Sebastian 🟩🥕@theStack
27 Oct 2024Austria
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dxe6 e.p. matt. geht aber natürlich nur, falls der letzten Zug von Schwarz e7-e5 war ;-)
Sebastian 🟩🥕@theStack
10 Oct 2024Austria
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Congrats, that's great news! 🍻
Sebastian 🟩🥕@theStack
7 Oct 2024Austria
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Sebastian 🟩🥕@theStack
12 Sep 2024Austria
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pfeeeeeeees ftw \o/
Sebastian 🟩🥕@theStack
6 Sep 2024Austria
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Two git aliases I find very useful for projects using CMake:
[alias]
buildinit = !cmake -B build
build = !cmake --build build --parallel
As the sub-shells are started at the git root, `git buildinit` and `git build` can be called from anywhere within a repository.
Sebastian 🟩🥕@theStack
2 Aug 2024Austria
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Old and busted: 💰2️⃣👁️📜#️⃣
New hotness: 💰2️⃣⚓
Merged PR from instagibbs: policy Add PayToAnchorP2A OP_1 0x4e73 as a standard output script for spending github.com/bitcoin/bitcoin/p…
Sebastian 🟩🥕@theStack
23 Jul 2024Austria
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Block filters are used for fast rescanning (if available) on descriptor wallets since v25.0, see github.com/bitcoin/bitcoin/b…
Sebastian 🟩🥕@theStack
1 Jul 2024Austria
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It's worth to note that creating segwit outputs with witness versions >= 1 is generally not violating standardness rules. Haven't inspected the tx in full detail yet, but my guess is that this tx propagated fine and the author didn't need out-of-band communication to the miner.
Sebastian 🟩🥕@theStack
30 Jun 2024Austria
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Neat, this tx could actually serve as a nice reference to look up the different output script types and how they are spent (if I'm not overlooking anything, it contains all types that are currently considered standard; see the `TxoutType` enum in Bitcoin Core). Bookmarked.
Sebastian 🟩🥕@theStack
3 May 2024Austria
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Seems to work in principle, FauCAT ftw: github.com/theStack/bitcoin-… still very lame with the fixed difficulty and missing delay, but maybe someone is motivated to pick it up and refine from there
Sebastian 🟩🥕@theStack
2 May 2024Austria
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Sounds like a fun mini-project to implement! With this proposed script though, I think OP_NOTIF execution would fail with SCRIPT_ERR_TAPSCRIPT_MINIMALIF, if I'm not missing something? (Probably a missing "OP_0 OP_EQUAL" before the OP_NOTIF?)