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- Aug 9, 202348 min
Rusty Russell and privacy and robustness in Lightning - episode 34
Rusty drops by to tell us about why privacy and robustness should be prioritized in Lightning. We discuss: LN symmetry Do we want LN Symmetry to be symmetrical? Listen to the conversation with instagibbs Peer to peer protocol CTV Pushing privacy and robustness to the front of the line The dynamics of developing a spec with commercially associated implementations Expecting new implementations Privacy revisited What broke when fee rate spiked?
- Jul 17, 202337 min
Elle Mouton, Oliver Gugger and Simple Taproot Channels - Episode 33
Elle Mouton and Oliver Gugger join us to talk with us about the Simple Taproot Channel proposal. We cover: Simple Taproot Channels Overview What’s the state of the spec? Changes to the scripts in Taproot Channels Refresher on CPFP carve-out and Anchor Outputs Why Anchor Outputs need to use script path spends Other goals of Simple Taproot Channels Why do PTLCs need Taproot funding outputs? Potential updates for the gossip protocol: Gossip 1.5 or Gossip 2.0 PTLCs Iterative approach or big push Recoverability of channel funds
- May 25, 202331 min
Alekos Filini, Daniela Brozzoni and the Bitcoin Development Kit (BDK) - Episode 32
Alekos Filini and Daniela Brozzoni visit the podcast to discuss the Bitcoin Development Kit (BDK). Hang out with them on the BDK Discord. We cover: How BDK started Why is it named BDK and not the Magical Bitcoin Library? The first users of BDK Rust HWI Built around descriptors The ideal use case of BDK Pain points Why do devs keep building wallets from scratch? Greenwallet If you have a working wallet, should you switch to BDK? HWI complaints (see Python) BDK 1.0 release features Sync Planning module
- Mar 22, 202357 min
Tadge Dryja and Lightning History and everything else - Episode 31
Tadge Dryja chats with us about writing the Lightning Network paper and working in the Bitcoin space. We discussed: Could blocks be bigger? Paper: On the instability of Bitcoin without the block reward Serving billions with Lightning The state of the debate when writing the Lightning Network White Paper Would Lightning be possible without Segwit? Looking in from outside on a project you started Trimmed HTLCs: Sending 1 sat vs 100,000 sats Limitations of the Lightning network Do high fees break lightning? LN-Symmetry (Eltoo) SIGHASH_ANYPREVOUT Why are soft forks so hard? What’s your wish list (hardfork wishlist wiki, softfork wishilist wiki) for protocol changes? coinpools Bitcoin needs to become more usable Tadge's thoughts on Education MAS.S62: Cryptocurrency Engineering and Design Dynamics of working on Bitcoin
- Mar 10, 202340 min
Andrew Chow and the Bitcoin Core Wallet - Episode 30
Andrew Chow joins us to discuss Bitcoin Core wallet development, PSBT, Output Descriptors, and HWI. We cover: - Why do we need a wallet in Bitcoin Core? - Refactoring the Wallet codebase to build Output Descriptors Should we rewrite the wallet? - Changes to Coin Selection - Wallet interoperability - Hardware Wallet Integration (HWI) - Partially Signed Bitcoin Transactions (PSBT) - Becoming Maintainer - Tracking the UTXO pool - Main components of the Bitcoin Core Wallet - Who uses Bitcoin Core Wallet? - Survey Results - What’s the future of the GUI? - Bitcoin Core GUI - Bitcoin Core GUI-QML - Switch to Descriptor-based wallets
- Feb 15, 202348 min
Greg Sanders, SIGHASH_ANYPREVOUT, ephemeral anchors and LN symmetry (ELTOO) - Episode 29
Greg Sanders joins us to discuss ANYPREVOUT, ephemeral anchors and LN symmetry (a.k.a. ELTOO). We chat about: - Package relay - Pinning attacks - BIP125 - T-Bast’s pinning attack summary - Mempool policy - Stuffing the mempool - 2017 - Rewrite mempool or make the problem simpler - Package relay RBF A.K.A. V3 - Reducing the standard transaction size to 65 bytes PR - March to LN symmetry - Daric: A Storage Efficient Payment Channel With Penalization Mechanism - Two-party eltoo w/ punishment by AJ Towns - BIP118 - SIGHASH_ANYPREVOUT - SIGHASH_NOINPUT - Softfork and activation history - Ephemeral anchors - op_2 email by Luke - Is ANYPREVOUT useful outside of LN symmetry?
- Feb 2, 202359 min
Sergi Delgado and Watchtowers, Lightning Privacy - Episode 28
Sergi Delgado joins us to discuss Watchtowers, his prior work in Bitcoin and Lightning privacy, Python vs. Rust and the impact of Eltoo. We cover: - Sergi’s prior research - Mapping Network Topology Research - TxProbe paper - Andrew Miller - Coinscope - Episode on Address Relay with Martin - Block-only connections PR by Suhas - An Empirical Analysis of Privacy in the Lightning Network - Lightning white paper, 2016 - Security and Privacy of Lightning Network Payments with Uncertain Channel Balances - Episode with Sergei on Probing - Channel Jamming paper - Episode with Clara and Sergei - Should we pay for failed payments? - HTLC withholding vs. HTLC hodling - Is Lightning flawed when it comes to privacy? - Watchtowers - Python PoC - ZmnSCPxj’s writing watchtowers - Building on LDK - Transition to rust - Altruistic towers vs professional services - More privacy considerations in Lightning - Monitoring and reacting paradigm - Storage and Eltoo - Professional tower revenue models - subscription vs. bounties
- Dec 27, 202252 min
Pieter Wuille and Tim Ruffing - Nesting, ROAST, Half-Aggregation, Adaptor Signatures (part 2)
We continue the conversation with Pieter Wuille and Tim Ruffing and Nesting, ROAST, Half-Aggregation, Adaptor Signatures, atomic swaps and more. If you have not tuned into the first part of this conversation, we recommend listening to that one first. We cover: - Nesting - ROAST - Cross-input Signature Aggregation - Half-aggregation - Half-Aggregation of BIP 340 Signatures and BIP340 - Adaptor signatures and atomic swaps Further resources: Stephan Livera Podcast #400 Jonas Nick and Tim Ruffing - Half Signature Aggregation
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