Kickoff

what we're not doing:char if we were villainmaxxing

Char Network is the world’s first bitcoin-native decentralized sequencer design. What would Char be doing if they were villainmaxxing?

Doing over 3000 non-standard OP_RETURNs in a day

This talk will talk about OP_RETURN Bot's biggest day doing over 3k transactions in a day. The complications with broadcasting many non-standard transcations in a short time period and different learnings that we can take from this.

Power Plant: Tour Group One

Let’s take a tour of Hoover Dam’s Power plant

You are all wrong about rollups and it is driving me insane

Rollups are a flavor of blockchain that rely on a parent blockchain for security and data availability. They do this so they do not have to bootstrap their own validator set. They do not need a sequencer, and they do not need a bridge. They can operate purely through bitcoin L1 transactions, or they can maintain an offchain mempool for better throughput. To provide different types of execution layers for bitcoin the asset, they can have a bridge (which can be a federation, a single custodian, or some version of BitVM). Bitcoiners were introduced to rollups through progress made in BitVM; specifically from teams in the BitVM alliance. But, these teams were building rollups before BitVM was discovered and announced. And, rollups have existed on bitcoin for over a decade! In this Lightning talk, Janusz will explain why everyone is wrong about rollups, why the rollup teams are tricking you into believing that the bridge defines the rollup, and why this semantics debate is just a rehashing of arguments from the past. Janusz will provide three examples of rollups, one with a bridge, one without, and one without a bridge & a sequencer. He will share how all three of these systems ultimately work the same from the lens of the rollup full nodes; the real users.

NostrMail - Learning from three decades of PGP

NostrMail is a cross-platform, end-to-end encrypted email client that bridges Nostr and traditional email protocols. It avoids the pitfalls of PGP by using Nostr for key discovery, it works with existing email providers like Gmail and uses wordlist encoding (e.g., BIP39) so ciphertext and signatures remain valid under forwarding. NostrMail is open source, cross-platform, and available now on the Zapstore.

Commerce is Culture

This talk will cover the history of open markets, the systems that dictate how we engage in commerce, how those systems have been broken, and the actions needed to stand up for our freedom to transact.

BitVM3 and Binohash Don’t Improve Bridge Security. Some Soft Forks Do.

BitVM3 and Binohash are exciting developments, but their impact on Bitcoin bridge security is often misunderstood. BitVM3 mainly improves collateral efficiency, making bridge constructions more capital efficient, while Binohash enables new forms of transaction introspection in Bitcoin Script with important limitations. In this talk, I explain why these advances do not fundamentally strengthen bridge security and explore which proposed Bitcoin soft forks actually move the needle.

Mempool policy is bitcoin's administrative state

This talk will compare how mempool policy is like the administrative state. When a self-governing people loses the ability for rigorous public debate and political compromise, the natural incentive is to outsource governing responsibility to processes outside of the regular political sphere. Once outsourced, normal checks and balances can be circumvented with changes expedited by experts. Here, the incentives are such that increasing complexity and knowing how to work the system above all is rewarded. Ossification doesn't freeze decisions in place. It shifts the realm of decision making elsewhere.

Breaking Cashu: Attacks and Defense

This talk covers Cashu security: attack vectors and how to prevent them, post-mortem analysis of responsibly disclosed exploits, offline cashu transactions and the double-spend problem, P2PK locks and other mechanisms to offset these risks and malicious mint behaviors. The first half will be attack vectors. The second half will include examples of what you can do as a user + mint operator to offset the attacks/risks.

Breaking Ossification

A discussion of the cultural weight that is preventing bitcoin from making changes needed to survive for centuries to come, and an optimistic look at how to break free of that weight.

Bitcoin Without Controversy

It seems that changes proposed to bitcoin are never without controversy. For this panel, we pull together veterans of the space who have dealt with their own amount of controversy over the years.

Proofless Consensus and Client-side Validation

Proofless consensus is a family of protocols that move transaction validation client-side, and minimises the responsibility of consensus to double-spend detection. This enables high-throughput private transactions with lightweight consensus. This talk explores preliminary interfaces, the proof-carrying data graph, and open questions such as Sybil resistance.

The Villains of the Next Internet.

AI Agents, Infinite Content, and the Collapse of Trust.

Power Plant: Tour Group Two

Let’s take a tour of Hoover Dam’s Power plant

OPEN MIC

Have something you want to talk about? We’ve got three 15-minute talk slots available for anyone to start or provoke a conversation.

Work In Progress

Sharing developments from Localhost team. Offering opportunities to contribute. Exploring feedback from the community on current projects.

BItcoin PIPEs v2: Covenants and ZKPs on Bitcoin L1 via Witness Encryption without a Softfork.

We'll talk about an extension of Bitcoin Script which includes non-consensus opcodes induced via PIPEs. We'll talk which kinds of Bitcoin L1-based protocols such a Script extension allows to create and under which assumptions they can utilize BTC as an asset.

The Case for Tail Emissions

Description to come

Bitcoin to the Moon: Necessary Adjustments for an Interplanetary Bitcoin

Bitcoin is heading to the moon, and beyond. With multi-minute interplanetary communications, what changes will we need to make to the bitcoin protocol to enable mining and transacting off-planet?

Oxford Debate: Quantum FUD vs Quantum Compute

In this classic return of the bitcon++ formal, Oxford debate series we invite two lions of the quantum ecosystem, Alex Pruden and @reardencode, to argue about quantum. The topic is: quantum FUD is a greater risk to bitcoin than quantum computers. Alex Pruden will be taking the negative; reardencodes the affirmative.

Closing