chore: added initial version of 2025-07-18-socratic-seminar-004

Author: douglaz

_posts/2025-07-18-socratic-seminar-004.md

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+---
+layout: post
+type: socratic
+title: "Socratic Seminar #4"
+meetup: "https://lu.ma/2kns3r9m"
+---
+
+## Announcements
+
+- Respect the privacy of participants
+- Meetups are never recorded. We want everyone to feel comfortable participating and discussing the scheduled topics, anonymously if they wish
+
+## Acknowledgements
+
+- Thanks to [Vinteum](https://vinteum.org/) and [Bitcoin Paraguay](https://bitcoinparaguay.org/) for the support
+
+## Warmup
+
+* [Wallet of Satoshi - Self Custodial mode (?)](https://xcancel.com/spark/status/1940168641301119094)
+    * [Spark TL;DR](https://docs.spark.money/spark/spark-tldr)
+    * [Statechains](https://bitcoinops.org/en/topics/statechains/)
+    * [Statechains Deep-Dive](https://medium.com/@RubenSomsen/statechains-non-custodial-off-chain-bitcoin-transfer-1ae4845a4a39)
+
+## Bitcoin
+
+* [Witnessless sync for pruned nodes](https://delvingbitcoin.org/t/witnessless-sync-for-pruned-nodes/1742/1)
+* [Bitcoin Snapshots - signed and pre-synced UTXO Set torrent](https://bitcoin-snapshots.jaonoctus.dev/)
+
+## Mining
+
+* [Stratum v2 STARK proof demo](https://bitcoinops.org/en/newsletters/2025/06/20/#stratum-v2-stark-proof-demo)
+* [How Stratum V2 Increases Mining Profitability](https://xcancel.com/StratumV2/status/1933191370123993478)
+
+## Privacy
+
+* [Zerolink CoinJoin coordinator](https://ashigaru.rs/news/announcement-whirlpool/)
+    * TODO: Add analysis showing some weaknesses of Zerolink
+
+## L2
+
+* [Garbled circuits and BitVM3](https://delvingbitcoin.org/t/garbled-circuits-and-bitvm3/1773)
+    * [BitVM3](https://bitvm.org/bitvm3.pdf)
+
+## Releases
+
+* [Electrum 4.6 features submarine swaps over Nostr](https://xcancel.com/ElectrumWallet/status/1933909910011453631)
+* [Phoenixd is now supported as official lightning backend on BTCPay Server](https://xcancel.com/BtcpayServer/status/1932120073243672863#m)