https://bitcointv.com/videos/watch/7392609f-9991-4532-8ed7-1e1f03848361 Base58's Summer Series of open-source project deep dives. Core-Lightning maintainer @niftynei does a deep dive on how CLN works. We see the gossip_store, decode some wire messages, look at the process tree, use the startup_regtest.sh script, write an RPC call and fix an issue! All in 2hrs. 0:00:00 Welcome to Base58 'n Coding, Kody's Intro 0:00:20 Lisa's Intro (What is Base58, What is Core-Lightning?) 0:01:35 Kody talks about the Links (see Links section) 0:03:08 Demo of the Replit for CoreLN Walkthrough (see Links) 0:04:40 Intro to Lightning (What is lightning) 0:12:39 Lightning BOLTs 0:14:36 Core-Lightning, how to use help 0:15:50 Lisa attempts to setup startup_regtest.sh 0:18:49 Configuring and installing a CoreLN node 0:23:01 Running start_regtest.sh 0:25:20 What's in a CoreLN .lightning directory? 0:26:09 the config file 0:28:12 lightning process tree: daemons + plugins (lightningd-regtest.pid) 0:35:00 the log file 0:35:33 All the lil daemons that lightningd starts up 0:38:22 Using start_ln (from startup_regtest) and connecting nodes 0:40:41 Adding funds to a CoreLN node 0:41:47 Reading the docs for the fundchannel command 0:43:42 Opening a channel between two peers 0:47:10 Locking in a channel 0:48:24 How do daemons talk to each other? (wire messages) 0:49:55 Just kidding, let's go back to the lightning-dir 0:50:02 the regtest dir (in the lightning-dir folder) 0:51:00 the lightning-rfc file 0:52:30 Gossip stores + databases (gossip_store / lightningd.sqlite3) 0:57:28 hsm_secret (back this up!) 0:58:02 looking at the lightningd.sqlite3 database 0:59:45 how are the daemons talking to each other? 1:08:17 making a new wire message 1:19:36 adding a new RPC json command to CoreLN 1:30:18 Let's talk about the plugin architecture! 1:35:55 Let's fix an issue (#5271) with liquidity ads 1:36:22 nifty goes on a hunt for where in the code the problem is coming from 1:41:38 We found it! Let's figure out what we know when we get here.. 1:45:20 Overview of the issue, we write a fix 1:50:57 How to test our fix (using the python integration tests/) 2:01:50 We got to find a real compact_lease from mainnet for test data 2:04:15 test passes! what else to check? 2:05:20 Making a PR to fix the issue 2:09:03 Final notes + comments (join us on Discord!) Join us next week for our Fedimint deep dive! Links: Core Lightning Github: https://github.com/ElementsProject/lightning Core Lightning Discord: https://discord.gg/gPnhAvkaGq Core Lightning Twitter: https://twitter.com/core_LN CoreLN Biweekly Dev Call: next one's monday! https://meet.jit.si/Core-Lightning-Open-Meeting Replit for CoreLN Walkthrough: https://replit.com/@base58/Base58-A-Tour-Of-Core-Lightning?v=1 Base58 Website: https://base58.info/ Pull request that @niftynei finishes: https://github.com/ElementsProject/lightning/pull/5389 Mon, 09 Nov 2026 17:01:25 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://bitcointv.com https://bitcointv.com/client/assets/images/icons/icon-1500x1500.png https://bitcointv.com/videos/watch/7392609f-9991-4532-8ed7-1e1f03848361 All rights reserved, unless otherwise specified in the terms specified at https://bitcointv.com/about and potential licenses granted by each content's rightholder.