bitcoin++ strikes

workshop

Early Bird Sessions: Bitcoin at Work(shop)

David Rodriguez, niftynei

Time

Fri, Oct 3 · 10:00 AM – 12:00 PM

Location

Main Stage

Type

workshop

Duration

2h

Formerly known as the Bitcoin LARP, join us for a Bitcoin Work(shop) where we walk through how nodes work in real time.

Speakers

David Rodriguez

Base58

Website

niftynei

bitcoin++

X Nostr GitHub Instagram Website

keynote

Requiem for a Decentralized Bitcoin

Matt Corallo

Time

Fri, Oct 3 · 12:30 PM – 1:00 PM

Location

Main Stage

Type

keynote

Duration

30m

Description to come

Speakers

Matt Corallo

Spiral

X Nostr GitHub Website

talk

An Announcement: Flux

Allen Farrington

Time

Fri, Oct 3 · 1:00 PM – 1:15 PM

Location

Main Stage

Type

talk

Duration

15m

Speakers

Allen Farrington

Flux

X Nostr

hackathon

Hackathon Expo

Alex Lewin

Time

Fri, Oct 3 · 1:15 PM – 2:30 PM

Location

Talks Stage

Type

hackathon

Duration

1h 15m

Speakers

Alex Lewin

Fedi

X GitHub Website

talk

The Fiat Payment Stack

Allen Farrington

Time

Fri, Oct 3 · 2:30 PM – 3:00 PM

Location

Main Stage

Type

talk

Duration

30m

Description to come

Speakers

Allen Farrington

Flux

X Nostr

talk

Lexe: Next-generation Lightning infrastructure based on TEEs

Max Fang

Time

Fri, Oct 3 · 2:30 PM – 3:00 PM

Location

Talks Stage

Type

talk

Duration

30m

Lightning Network adoption faces critical challenges: unreliable offline receive capabilities, expensive node hosting, and loss of self-sovereignty from custodial wallets. Lexe’s radical next-generation architecture fixes these problems by leveraging Trusted Execution Environments (TEEs) to create secure, always-online Lightning nodes that don’t compromise on self-custody.

Speakers

Max Fang

Lexe

X GitHub Website

talk

Lightning Node Security

Fabrice Drouin

Time

Fri, Oct 3 · 3:30 PM – 4:15 PM

Location

Main Stage

Type

talk

Duration

45m

We'll describe how we secure one of the largest Lightning Nodes on the network, why usual go-to solutions don't work, and why it applies to most crypto-currency applications (layer 2, smart contracts, ..).

Speakers

Fabrice Drouin

ACINQ

X GitHub Website

talk

This One Math Trick Powers the Future of Lightning - PTLCs 101

jaonoctus

Time

Fri, Oct 3 · 3:30 PM – 4:15 PM

Location

Talks Stage

Type

talk

Duration

45m

Discover how a simple elliptic curve trick enables more private and flexible Lightning payments. This talk breaks down the math behind PTLCs — including adaptor signatures, scalar tweaks, and how they improve on HTLCs

Speakers

jaonoctus

ZBD

X Nostr GitHub Website

talk

Everything I know about Routing Reliability and Liquidity on the Lightning Network

Rene Pickhardt

Time

Fri, Oct 3 · 4:15 PM – 5:00 PM

Location

Main Stage

Type

talk

Duration

45m

Since 2018 I have been studying the Routing dynamics of the Lightning Network. My results have been influential to all major implementations. Yet many of my findings and knowledge is scattered over various research papers, git discussions and articles. Also I have obviously read quite a bit about the ideas of other researchers. I would like to use this opportunity to summarize everything that I have learnt over the years about the routing dynamics and liquidity management challenges on the network. Hopefully this will give you a solid basis of insights to improve your lightning network operations.

Speakers

Rene Pickhardt

opensats

X GitHub Website

talk

Challenges of Building a Non-Custodial Lightning App

ek

Time

Fri, Oct 3 · 4:15 PM – 5:00 PM

Location

Talks Stage

Type

talk

Duration

45m

Stacker News moved to non-custodial on Jan 3, 2025. This talk will cover how we transitioned to it over the course of 2024, the challenges we had to overcome to deliver a good user experience, and how it’s going.

Speakers

ek

Stacker News

Nostr GitHub Website

talk

Graduated wallets

Evan Kaloudis

Time

Fri, Oct 3 · 5:30 PM – 6:00 PM

Location

Main Stage

Type

talk

Duration

30m

Graduated wallets allow users to onboard to a custodial system and experience the magic of making a Lighting payment, then upgrade when it's economically feasible to self-custody. Learn about how ZEUS is thinking about graduated wallet UX and our Cashu integration.

Speakers

Evan Kaloudis

ZEUS

X Nostr GitHub Website

talk

Gossip v2: Measurements to inform Minisketch-ing

Jonathan Harvey-Buschel

Time

Fri, Oct 3 · 5:30 PM – 6:00 PM

Location

Talks Stage

Type

talk

Duration

30m

The gossip network that exists between lightning nodes is a fundamental component of the lightning payment channel network; without it, payers could not easily build routes and attempt to send payments. However, the health and performance of this network is not being actively monitored. Anecdotally, serious issues are discovered intermittently, and patched over with fixes. There are also observed issues with lost messages, or high bandwidth consumption, that are fundamentally at odds, given how gossip works today. With the gossip v2 proposal underway, this talk explores: - The performance of the existing mainnet gossip network, by presenting analysis of observed gossip traffic - Historical changes in implementation behavior, and how may that impacts gossip performance - Brief introduction to Minisketch and Erlay as an alternative to batched flooding; differences between Bitcoin L1 gossip, and Lightning gossip - Discussion on how the current gossip v2 proposal impacts usage of Minisketch / set reconciliation - Call to Action / Call for Feedback

Speakers

Jonathan Harvey-Buschel

X GitHub

talk

Lightning's (other) Toxic Waste Problem

Peter Todd

Time

Fri, Oct 3 · 6:00 PM – 6:30 PM

Location

Main Stage

Type

talk

Duration

30m

Why are lightning nodes keeping payment routing logs forever? Tor doesn't keep logs, even if you want it to. Yet Lightning nodes are keeping these logs forever, undermining the privacy protections of onion routing by creating a massive honeypot of data that could be used to deanonymize lightning transactions. In this talk will look at what data is kept, what data actually needs to be kept, and ask why implementations keep unnecessary data.

Speakers

Peter Todd

OpenTimestamps

X Nostr GitHub Website

talk

Ark: Your gateway to lightning

Erik De Smedt

Time

Fri, Oct 3 · 6:00 PM – 6:30 PM

Location

Talks Stage

Type

talk

Duration

30m

Lightning is becoming the de-factor interoperability layer for bitcoin payments. However, as an end-user you might not want to run a lightning node. In this talk I give a short intro to Ark and explain how it can make your lightning experience go better

Speakers

Erik De Smedt

Second

X GitHub Website

panel

Scaling Lightning

Evan Kaloudis, Shinobi, Alex Lewin, Walton, Calle

Time

Fri, Oct 3 · 6:30 PM – 7:15 PM

Location

Main Stage

Type

panel

Duration

45m

Scaling Lightning: Running a lightning node is essentially plug and play. Self-sovereign bitcoin and lightning payments have never been easier. So why are blocks so empty? Is this evidence of the lightning network working as intended? Or is the network growth limited by technical, UX, and social challenges?

Speakers

Evan Kaloudis

ZEUS

X Nostr GitHub Website

Shinobi

Bitcoin Magazine

X Website

Alex Lewin

Fedi

X GitHub Website

Walton

bitcoin++

X Website

Calle

Cashu

X Nostr GitHub Website

talk

RaspiBlitz — It started with Lightning; where are we now?

/rootzoll

Time

Fri, Oct 3 · 6:30 PM – 7:00 PM

Location

Talks Stage

Type

talk

Duration

30m

The RaspiBlitz project was started during the first Lightning Hackday 7 years ago, with the idea of running a small, always-on Lightning Network routing node at home. How far have we come? What is the status quo? And what is NixBlitz?

Speakers

/rootzoll

RaspiBlitz

X Nostr GitHub Website

talk

Integrating Lightning and Utreexo - a study case

Davidson Souza

Time

Fri, Oct 3 · 7:00 PM – 7:30 PM

Location

Talks Stage

Type

talk

Duration

30m

In this talk, I'll present my research about how to integrate Utreexo proofs with the lightning network. Allowing for more sovereign lightning nodes that are still lightweight for end-clients.

Speakers

Davidson Souza

Vinteum

X Nostr GitHub Website

workshop

Early Bird Sessions: Programming Lightning

Austin Krauss

Time

Sat, Oct 4 · 10:00 AM – 12:00 PM

Location

Talks Stage

Type

workshop

Duration

2h

A workshop that teaches developers how lightning works and how to build a node using LDK. This is a condensed version of a longer, multi-day course. At btc++ we’ll focus on "Intro to Payment Channels". This workshop walks developers through how to build a Lightning channel. We start with the concept of simply sending off-chain transactions to a peer via email or text, and then we work our way towards adding components one-by-one (ex: multi-sig, spending paths, timelocks, revocation keys). With each step, we discuss the shortcomings of channel constructions that don't work well, and we'll eventually make our way to a robust Lightning Channel. The entire workshop is in Replit, so students will build funding, commitment, and HTLC transactions and broadcast them themselves into a regtest environment running in the background.

Speakers

Austin Krauss

Spiral Grantee (I do not work for them - I am just a grantee)

X Nostr GitHub

talk

Running Lightning at Scale

Christian Decker

Time

Sat, Oct 4 · 12:15 PM – 1:00 PM

Location

Main Stage

Type

talk

Duration

45m

Description to come

Speakers

Christian Decker

Blockstream // Greenlight

X GitHub

talk

Differential Fuzzing on Lightning Network

Erick Cestari

Time

Sat, Oct 4 · 12:15 PM – 1:00 PM

Location

Talks Stage

Type

talk

Duration

45m

This talk introduces fuzzing and differential fuzzing techniques. We'll explore how these testing methods can make the Lightning Network more secure and robust by uncovering inconsistent behavior between different Lightning implementations and their adherence to the BOLT specifications.

Speakers

Erick Cestari

Vinteum

X GitHub Website

talk

NLightning: Implementing Lightning in .NET

Nickolas Goline

Time

Sat, Oct 4 · 1:00 PM – 1:30 PM

Location

Main Stage

Type

talk

Duration

30m

Nickolas gives an update on the state of his c# lightning implementation, NLightning

Speakers

Nickolas Goline

OpenSats

X GitHub Website

talk

State of Lightning Privacy

Elias Rohrer

Time

Sat, Oct 4 · 1:00 PM – 1:30 PM

Location

Talks Stage

Type

talk

Duration

30m

tbd

Speakers

Elias Rohrer

Spiral

X Nostr GitHub Website

hackathon

Hackathon Finals

Alex Lewin

Time

Sat, Oct 4 · 1:30 PM – 2:15 PM

Location

Main Stage

Type

hackathon

Duration

45m

Speakers

Alex Lewin

Fedi

X GitHub Website

talk

Sim-ln

Fernando L

Time

Sat, Oct 4 · 2:15 PM – 2:45 PM

Location

Talks Stage

Type

talk

Duration

30m

SimLN is an open-source Rust tool for simulating Lightning Network payment activity across real or mocked topologies. Compatible with LND, CLN, Eclair, it enables developers, researchers, and signet operators to generate realistic traffic for load testing, protocol evaluation, or synthetic data generation. This session introduces SimLN’s capabilities, demonstrates how to configure and run simulations using a simple sim.json file, and explores its flexible modes—from fully randomized traffic to precisely scheduled payments. Attendees will leave with a clear understanding of how to integrate SimLN into their own environments to accelerate testing and experimentation on the Lightning Network.

Speakers

Fernando L

libreria de satoshi

X GitHub

talk

Splicing Lightning

Dusty Daemon

Time

Sat, Oct 4 · 2:45 PM – 3:15 PM

Location

Main Stage

Type

talk

Duration

30m

What’s new in Lightning and how it’s currently splicing out.

Speakers

Dusty Daemon

core-lightning

X Nostr GitHub Website

talk

Cashu: Money at Lightning Speed

Calle

Time

Sat, Oct 4 · 3:15 PM – 4:00 PM

Location

Main Stage

Type

talk

Duration

45m

Description to come

Speakers

Calle

Cashu

X Nostr GitHub Website

talk

Receiving Bolt12 payments in LND

Maurice Poirrier

Time

Sat, Oct 4 · 3:15 PM – 4:00 PM

Location

Talks Stage

Type

talk

Duration

45m

tbd

Speakers

Maurice Poirrier

B4OS

X Nostr GitHub Website

panel

Implementing Lightning

Nickolas Goline, Christian Decker, Matt Corallo, niftynei, Fabrice Drouin

Time

Sat, Oct 4 · 4:00 PM – 4:45 PM

Location

Main Stage

Type

panel

Duration

45m

What’s new in lightning implmentations

Speakers

Nickolas Goline

OpenSats

X GitHub Website

Christian Decker

Blockstream // Greenlight

X GitHub

Matt Corallo

Spiral

X Nostr GitHub Website

niftynei

bitcoin++

X Nostr GitHub Instagram Website

Fabrice Drouin

ACINQ

X GitHub Website

hackathon

Hackathon Awards + Closing

Alex Lewin, niftynei

Time

Sat, Oct 4 · 4:45 PM – 5:15 PM

Location

Main Stage

Type

hackathon

Duration

30m

Speakers

Alex Lewin

Fedi

X GitHub Website

niftynei

bitcoin++

X Nostr GitHub Instagram Website