I'm joined by guests [Calle]( https://twitter.com/callebtc ), [Eric Sirion]( https://twitter.com/EricSirion ), [Odell]( https://twitter.com/odell ) and [Rijndael]( https://twitter.com/rot13maxi ) to discuss ecash.

**Discussion Topics:**

* 00:01:30 Guest introductions

* 00:02:59 Chaumian ecash origins

* 00:08:04 ecash integration with monetary networks

* 00:13:49 Technicals of ecash

* 00:23:17 Supply and auditability

* 00:27:07 Is ecash the third layer of Bitcoin?

* 00:33:48 Cashu

* 00:38:12 Fedimint

* 00:45:09 Federated signing and sovling the double spend problem

* 00:51:26 Fedimint tradeoffs

* 00:55:24 How does the federation work?

* 00:57:34 Fedimint denomications problem

* 00:58:44 How is a federation formed?

* 01:03:49 Comparing Fedimint to liquid

* 01:07:55 Ease of use setting up a mint

* 01:10:14 Running a federation/setting up a mint

* 01:18:26 The open source movement

* 01:24:03 Proof of reserves in ecash

* 01:39:35 Onchain vs lightning mints

* 01:42:21 Auditability and proof of liabilities

* 01:45:04 Fedipools

* 01:51:08 Scriptable ecash

* 01:59:36 Nostr + ecash

* 02:03:52 Naming ecash units of account

* 02:06:26 ecash integration and intercompatability

* 02:11:49 Final thoughts

**Notes & Resources:**

* Fallacies of distributed computing [[Wikipedia]]( https://en.wikipedia.org/wiki/Fallacies_of_distributed_computing )

* Fedipool: Fedimint Could Mitigate Bitcoin Mining Pool Concerns [[Odell]]( https://www.discreetlog.com/fedipool )

* Fedimint [[Website]]( https://fedimint.org/ )/ [[Github]]( https://github.com/fedimint/fedimint )

* Fedimint Primer [[Bitcoin Design]]( https://www.youtube.com/watch?v=G4iclApJL0c )

* Cashu [[Website]]( https://cashu.space )/[[Github]]( https://github.com/cashubtc/cashu )

* [Nutstash]( https://nutstash.app/ )

* eCash for Better Bitcoin Privacy [[MAX MONEY 21M]]( https://maxmoney.substack.com/p/ecash-for-better-bitcoin-privacy )

* Cashu Tutorial - Chaumian Ecash On Bitcoin [[BTC Sessions]]( https://www.youtube.com/watch?v=riTRD0BdMDI )

**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:⚡nvk@nvk.org (not an email!)

**Full show notes: https://bitcoin.review/podcast/episode-31**