I'm joined by guests Andrew Poelstra and [Adam Gibson]( https://snort.social/p/npub1vadcfln4ugt2h9ruwsuwu5vu5am4xaka7pw6m7axy79aqyhp6u5q9knuu7 ) to discuss SegWit and related issues including taproot, schnoor, inscriptions and the witness discount.
**Discussion Topics:**
* 00:02:14 Introductions to guests
* 00:05:06 Introductions to episode
* 00:06:12 bech32
* 00:15:46 The malleability problem
* 00:22:23 Mental model for understanding malleability
* 00:26:16 Primer on SegWit
* 00:36:23 Why does witness data have a discount?
* 00:42:40 What is sighash?
* 00:46:55 How is the weight calculated?
* 00:53:19 Inputs and outputs
* 00:58:41 Importance of the UTXO set
* 01:02:45 Block size considerations
* 01:04:13 Calculating the witness data discount
* 01:09:00 Introduction to Taproot and Schnoor
* 01:11:08 Schnoor signatures
* 01:21:01 Taproot
* 01:36:59 Taproot use cases
* 01:40:31 Timelocks, covenants and OP_VAULT
* 01:44:44 Taproot + lightning
* 01:47:17 Ordinals and inscriptions
* 02:06:40 References
* 02:09:11 Final thoughts
**Links & Contacts:**
* Website: https://bitcoin.review/Podcast
* Twitter: https://twitter.com/bitcoinreviewhq
* NVK Twitter: https://twitter.com/nvk
* Telegram: https://t.me/BitcoinReviewPod
* Email: producer@coinkite.com
* Nostr & LN:âš¡nvk@nvk.org (not an email!)
**Full show notes: https://bitcoin.review/podcast/episode-29/**