Lead Core Lightning, Standards Wrangler, Bitcoin Script Restoration ponderer, coder. Full time employed on Free and Open Source Software since 1998. Joyous hacking with others for over 25 years.
Public Key
npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Profile Code
nprofile1qqs0zuj4s6jq9sr2ajqc69rc53d25rwpd3afcjrfm97r2qek69hcuscpz3mhxue69uhkummnw3ezummcw3ezuer9wcq3camnwvaz7tmwdaehgu3wvf5hgcm0d9hx2u3wwdhkx6tpdsq3jamnwvaz7tmnvakzuun4wd6xxmmjwqhxxmmd9esh2qguwaehxw309aex2mrp0yhx6at5d9h8jampd3kx2apwvdhk6qgswaehxw309ahx7um5wgh8w6twv5vm03sh
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Published at
2024-06-08T03:44:48Z Event JSON
{
"id": "2a2f9df4a08077b41de1ca2ec3dd7d072ca45729a1f8debdf711e46de1586e6b" ,
"pubkey": "f1725586a402c06aec818d1478a45aaa0dc16c7a9c4869d97c350336d16f8e43" ,
"created_at": 1717818288 ,
"kind": 0 ,
"tags": [
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"alt",
"User profile for Rusty Russell"
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],
"content": "{\"name\":\"Rusty Russell\",\"display_name\":\"Rusty Russell\",\"website\":\"https://rusty.ozlabs.org\",\"about\":\"Lead Core Lightning, Standards Wrangler, Bitcoin Script Restoration ponderer, coder. Full time employed on Free and Open Source Software since 1998. Joyous hacking with others for over 25 years.\",\"lud16\":\"npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s@npub.cash\",\"nip05\":\"[email protected] \",\"picture\":\"https://rusty.ozlabs.org/images/Rusty_Russell-lca2011+crop.jpg\"}" ,
"sig": "16ded7f3f6efc75faa92bca1936052a0244e479662f36393857d45acceeca06f47ccdc61e1156b673c7a06ae17ff1804ac8177da28aecb38b1d4dba8e3b7b8ef"
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Last Notes npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Token bucket filter for the win: most occasional posters are not *regular*. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Finally read BIP-54 (mirror at https://bips.dev/54/) and it is straightforward,minimal and thorough. At this point I can endorse it as a good idea and worth doing. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell I am loving listening to the Pieter Wuille interview. It's clear from motivation to technical explanation, and Stephan shepherds the discussion masterfully! npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Here are two of my favorites: npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell https://json5.org/ npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Each Bitcoin you send has a "script" which says how it can be spent: usually just a signature for the owner's key. There's lots of other stuff yo can do though. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell https://github.com/bitcoin/bips/pull/2118 npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Randomness ("luck") is such a factor in life, and hard to disentangle. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Kick the can down the road? I cannot see the appeal from any direction... npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell You are minmaxing again. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell https://rusty-lightning.medium.com/the-three-economic-eras-of-bitcoin-d43bf0cf058a npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell You don't understand. There are no rulers. You cannot prevent people doing stupid things. This is fundamental, and hardest to emotionally grasp. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell To check the signature, you hash the transaction. So the only cost that OP_RETURN is doing is the cost to download and hash it. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell You only have to download and hash: you don't have to check extra signatures (our most expensive operation) or put them in the UTXO set (our most constrained memory resource). npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell But not relaying them disadvantages small and anonymous miners, driving centralization and thus putting my own UTXOs in danger. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell You will not be at peace until you understand the truth: every non-coinbase bitcoin transaction which does not eventually send funds to me is spam. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell So, OP_RETURN is fine, as is annex data which don't increase validation burden? And cutting off OP_RETURN and driving those uses to fake pubkeys, which does increase future validation costs, is a threat? npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell It adds an entire transaction! Every time it does that, it uses up farmore space than an 80-byte OP_RETURN. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell And does this mean you're okay with transactions that transfer NFTs? Because that's a financial transaction? npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell OTS transactions only exist to put non-financial data in the Bitcoin blockchain. Is that ok? npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell OpenTimestamps transactions aren't financial data, nor memes. So are they spam? npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Great, enjoy. Wasn't talking or thinking about BIP110, but you do you. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Indeed. Lightning commitment transactions stash the commitment number in the nSequence and nLocktime. Is that spam? npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell I thought someone would build a great UI on top of iptables. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell https://www.theregister.com/2026/02/16/semantic_ablation_ai_writing/ npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell None of those celebrating her departure are Bitcoiners. Because clearly they neither understand or like Bitcoin. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Reading comments on Gloria's departure from people who have never contributed anything is stepping in an enraging sticky fecal mess. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Suggesting such things means you're clearly not a Real Bitcoiner! npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell I have been having way too much fun reading moltbook.com npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell https://nostr.download/98b17a8e0b35750354e38270da480e3c35555466e150576aba14a89cf3108950.jpg npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Little-known fact: just like Gloria, "Solana" is also my duress word! npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Just finished "This is how you lose the time war". It was more literary than my usual fare, but it feels good to be stretched (there were at least three times I stopped to look up words). npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell In 1997 I attended USENIX, a conference: in particular the "Uselinux" track. Many stories I could and have told, but it kicked off a career timeline I still marvel at: npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell You can easily spot payments flowing through the network, just based on TCP packet size. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Hacked up a "constant message size" change for CLN, inspired by https://github.com/lightning/bolts/pull/1304 npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Define "bitcoiner" and I'll let you :) npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Damn, there was a proposal for BOLT spec changes to enable fixed-size messages, and now I have to implement it to show it's unnecessary... npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Except that hotel gym in the US, where I had to convert everything from lbs to figure out whether I was slacking off or just jet lagged! npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell https://rusty.ozlabs.org/2011/05/19/if-you-didnt-run-code-written-by-assholes-your-machine-wouldnt-boot.html npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Seems similar! Mine is for my specific setup: I have different machines on home vs work, so I wanted it to Just Work. And it's one file: npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Now I have a shell script `rcargo` which remote compiles rust crates: I work on my laptop but have beefy machines on my home and work LANs. You'd have to reimplement cargo to do it much finer-grained, apparently: sccache used to and gave up? npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell "and see" - > "in C". npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell https://crates.io/crates/linestats npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Sometimes people speak of Bitcoin and I get a moment of disorientation before I realize they're speaking of it as an *investment*. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell WMD is also interesting for *when it was written*: the US had just gone off the gold standard so there was interest in such a cautionary tale. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell My second week of Rust (only a few hours a day though: I am on vacation after all) has me reproducing and enhancing a tool I wrote in C. It takes multiple lines and runs stats on the numbers in it. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell I have published my first Rust crate. A the library that I've always wanted to exist and would normally have written in C, so it was a good chance to experiment with rust. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell You're perfectly good. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell 1. No, I'm not reading your article on quantum. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell I love this pattern: excellent advice. I asked ChatGPT how to do this in Rust, and it suggested a template using a phantom type was idiomatic Rust: npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Leaning into the type system is one of the distinctive traits of my C code, too (and something which I really miss in Python, with its tacked-on type annotations). But Rust certainly lends itself well to this style! npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Since I'm taking a few weeks vacation, I've decided to seriously try to learn rust. My method in this case is to ask ChatGPT to guide me (but not write for me!) a library ("crate") that I've always wanted to write and never got around to. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Happy VPN-day Australia, to those kids who celebrate! npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell In preparation for onboarding new core lighting developers are preparing a series of videos. So I've been asking ChatGPT about CLN developer features, particularly with comparison with other projects people might be familiar with. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Seriously considering putting two RTX 6000 in my upcoming build machine. Puts the price up an order of magnitude, but truly private AI might be a worthwhile investment. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell The latest (final?) #CLN release candidate fixes a long-standing bug where we could forget UTXO spends when we restart. This explains a variety of bug reports we have seen and been unable to reproduce over the years: the most recurrent being gossipd telling peers about channels which are long closed. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell https://nostr.download/4e7093622238912393bba22e9440c0de523eee99da3f5774ea198defe9277778.jpg npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell With my bike being repaired, I've been doing more walking. Australian cities are really optimised for driving, but I must say it gives me a lot of time to reflect on broader issues, probably a decent way to increase my nostr posting! npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Rough thoughts on OP_EXPIRE: npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Bitcoin core no longer supports raw private keys, which is the simplest representation I can think of. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Yes. Though you have to *start* with BIP39: you can't take a secret and ask "give me this as BIP39". You can with BIP93. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell It took me a while to realize that for most people, flying to a different country doesn't take half a day... npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell @nprofile…xxx2 recently posted on X about the danger of "store and forget" for Bitcoin over decades. Unfortunately he's right. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Seems like it would only be a win if you ensure low IDs are the popular ones. And then, consider a bitmap? npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Christian Decker made a side comment on my PR about a potential further optimization for Postgres. I spent an hour on it, trying to get it to fit in our db API. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Yep! You create a blinded path via a known node (or, if you want, more than one). You can put as many (fake) hops in those paths as you want. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell As an old coder, these numbers make me sad. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell I think I got nerd sniped into implementing online compaction for CLN's gossip store. Mainly from people agitating that we should use a DB for gossip messages. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Not the compile times! npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell I think finding a bug where printf("%*.s") was used instead of printf(".*s") was the point at which I realized that some C issues cannot be mitigated with better tooling... npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Yes, this is a single commit! Should have mentioned... npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell In two days' time Julian and I will be doing an open Jitsi meeting to discuss the work on Script Restoration. Come and ask questions! npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Should I run open hours for the script BIPs? Like, one a week for four weeks, you can show up and ask questions and I'll try to answer? npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell I strongly suspect that the bitcoin experience, even for veterans, will be quite different in ten years. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell A bolt12 offer with an amount is better ux than a bolt11 though, in that it's safe to share, and if you try to pay it multiple times worst case the recipient gets paid multiple times, instead of some random intermediate node stealing your funds. And you get payer proof (though there's no tooling to expose this yet, sorry!). npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell Wait a year. This will be gone. Some will have learned something, most will have forgotten. npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s Rusty Russell I am the only user in Australia!
