bitcoin++ pays in cash

keynote

Conference Kickoff

niftynei

Time

Fri, Oct 11 · 10:00 AM – 10:30 AM

Location

Main Stage

Type

keynote

Duration

30m

Speakers

niftynei

bitcoin++

X Nostr GitHub Instagram Website

keynote

The second renaissance of ecash

Calle

Time

Fri, Oct 11 · 10:30 AM – 11:00 AM

Location

Main Stage

Type

keynote

Duration

30m

The revival of ecash is unlocking a new frontier for digital payments, driving innovation across the Bitcoin ecosystem. In this talk, I will explore the pioneering work being done by developers building applications with this technology. We will examine the cryptosystem behind the Cashu protocol and discuss potential improvements, paving the way for more advanced Chaumian ecash systems in the future.

Speakers

Calle

Cashu

X Nostr GitHub Website

keynote

Federated eCash mints 101

Eric Sirion

Time

Fri, Oct 11 · 11:00 AM – 11:30 AM

Location

Main Stage

Type

keynote

Duration

30m

Curious about Federated eCash Mint but not sure what it’s all about? In this session, we’ll break down how it works, what you can actually do with it, and why it matters. From its privacy features to real-world use cases, we’ll cover everything you need to know in simple, no-nonsense terms. Whether you’re completely new or just looking to get a better understanding, this talk will help you figure out how Federated eCash Mint can make a difference.

Speakers

Eric Sirion

Fedimint

X Nostr GitHub Website

talk

Ecash for Other Stuff

Max Hillebrand

Time

Fri, Oct 11 · 11:30 AM – 12:00 PM

Location

Main Stage

Type

talk

Duration

30m

The rational, challenges, and optimizations of using ecash in Wasabi Wallet as anonymous api access right management tool.

Speakers

Max Hillebrand

Cypherpunk

X Nostr GitHub Website

talk

Nutsack: Unsiloed Data, Unsiloed Money

calvadev⚡

Time

Fri, Oct 11 · 12:45 PM – 1:30 PM

Location

Main Stage

Type

talk

Duration

45m

NIP-60 + NIP-61 bring interoperable wallets to any nostr app, along with immediate, verifiable zaps.

Speakers

calvadev⚡

Shopstr

Nostr GitHub Website

talk

How to build a Fedimint wallet in 20 minutes (without Rust)

Alex Lewin

Time

Fri, Oct 11 · 12:45 PM – 1:30 PM

Location

Talks Stage

Type

talk

Duration

45m

The Fedimint Web SDK just launched. Join Alex Lewin for a deep dive into what it enables for ecash payments on the web.

Speakers

Alex Lewin

Fedi

X GitHub

talk

Ecash in non-permissive environments

leito

Time

Fri, Oct 11 · 1:30 PM – 2:00 PM

Location

Main Stage

Type

talk

Duration

30m

Ecash is a revolutionary technology, but would it work in a SHTF situation? How would people transact during a national blackout or if a government severed a country's international internet connection?

Speakers

leito

Nutmix

Nostr GitHub

talk

Fedimint Consensus

joschisan

Time

Fri, Oct 11 · 1:30 PM – 2:15 PM

Location

Talks Stage

Type

talk

Duration

45m

How to design a low latency Byzantine Fault Tolerant system for constant performance with respect to the number of nodes.

Speakers

joschisan

Fedimint

X GitHub

talk

Could STARK proofs be good for Cashu ?

Thomas Voegtlin

Time

Fri, Oct 11 · 2:00 PM – 2:30 PM

Location

Main Stage

Type

talk

Duration

30m

What if we could create a mint that could be penalized if it doesn't play by the rules? That's where STARK proofs come in. We will speak about Coconut, an experimental Mint and Wallet, written in Zig, aiming to explore potential applications of ZK proofs for Cashu protocol. We will think about how STARK proofs could potentially be used to reduce trust assumptions of the protocol.

Speakers

Thomas Voegtlin

Electrum

GitHub Website

talk

Fedimint Footprints: Exploring What's Visible

Brad Stachurski

Time

Fri, Oct 11 · 3:00 PM – 3:30 PM

Location

Main Stage

Type

talk

Duration

30m

A brief exploration of publicly available data from Fedimints using an open-source tool, Fedimint Observer.

Speakers

Brad Stachurski

Fedimint

GitHub

workshop

Nostr Wallet Connect and Ecash

Super Testnet

Time

Fri, Oct 11 · 3:00 PM – 4:00 PM

Location

Talks Stage

Type

workshop

Duration

1h

In this workshop, you'll learn how to add lightning to your project easily by combining ecash with Nostr Wallet Connect

Speakers

Super Testnet

Independent

X Nostr GitHub

talk

Building Ecash Support into Web Apps

IroncladDev

Time

Fri, Oct 11 · 3:30 PM – 4:00 PM

Location

Main Stage

Type

talk

Duration

30m

A talk on integrating and supporting ecash in web apps

Speakers

IroncladDev

Fedi

Nostr GitHub

talk

Federation Stats

Lefteris & Tacio

Time

Fri, Oct 11 · 4:00 PM – 4:30 PM

Location

Main Stage

Type

talk

Duration

30m

Short presentation on Fedi's white-glove federations

Speakers

Lefteris & Tacio

Fedi

workshop

CDK Deep Dive

thesimplekid

Time

Fri, Oct 11 · 4:00 PM – 4:45 PM

Location

Talks Stage

Type

workshop

Duration

45m

In this workshop, we’ll provide an overview of the Cashu Dev Kit (CDK), focusing on both the mint and wallet components. We’ll walk you through how to set up CDK in your project and how to use it to create a basic wallet. This session is practical and hands-on, using real-world examples to help you understand the core concepts and functionalities of the Cashu Dev Kit. By the end of the workshop, you’ll have built a simple yet functional wallet and gained a solid understanding of how to leverage CDK in your projects.

Speakers

thesimplekid

X Nostr GitHub Website

talk

Un-custody: A New Approach To Permissionless Transactions

Periwinkle Doerfler

Time

Fri, Oct 11 · 4:30 PM – 5:00 PM

Location

Main Stage

Type

talk

Duration

30m

There are currently two main approaches to Bitcoin custody: self-custody, e.g. the use of non-custodial wallets or cold storage, and centralized custody, through trusted 3rd parties and multisignature schemes. In an abstracted environment (which maintains Bitcoin finality and proximity) there is a third option: un-custody - or custody-by-consensus - a custody scheme completely foregoing cryptographic proofs. This talk explores un-custody and its benefits and applications, particularly with respect to DeFi systems like ecash implementations.

Speakers

Periwinkle Doerfler

Glittr

X Website

hackathon

Hackathon Kick-off

Alex Lewin

Time

Fri, Oct 11 · 5:00 PM – 5:30 PM

Location

Main Stage

Type

hackathon

Duration

30m

Get an overview of the prizes and judging criteria, and find your team to start working at the hackathon kickoff session.

Speakers

Alex Lewin

Fedi

X GitHub

keynote

Day 2 Kickoff

niftynei

Time

Sat, Oct 12 · 10:00 AM – 10:15 AM

Location

Main Stage

Type

keynote

Duration

15m

Speakers

niftynei

bitcoin++

X Nostr GitHub Instagram Website

workshop

Cashu on Shopstr, NIP-60 Cashu Wallet

calvadev⚡

Time

Sat, Oct 12 · 10:15 AM – 11:15 AM

Location

Main Stage

Type

workshop

Duration

1h

Cashu on Shopstr: An overview of how Cashu is used throughout the Shopstr marketplace Nostr client. NIP-60 Cashu Wallet: A workshop going over how to implement a Nostr-based Cashu wallet.

Speakers

calvadev⚡

Shopstr

Nostr GitHub Website

workshop

P2P Transmission Methods

Oscar Lafarga

Time

Sat, Oct 12 · 10:15 AM – 11:15 AM

Location

Talks Stage

Type

workshop

Duration

1h

Copy-pasting is easy enough... Animated QR codes are cool too! What else can we do? In this workshop we'll explore different ways of transmitting ecash from one device to another, particularly mobile devices in low-connectivity environments. - Text-based transmission (copy-paste & send) - Visual transmission (animated QR codes) - Audio transmission (wtf? is this even possible?)

Speakers

Oscar Lafarga

Fedi

X GitHub Website

talk

Fedimint Lightning Gateway v2

Justin Moeller

Time

Sat, Oct 12 · 11:15 AM – 12:00 PM

Location

Talks Stage

Type

talk

Duration

45m

This presentation will describe the evolution of Fedimint's Lightning Gateway architecture, from a CLN extension, to supporting LND, modularizing each component, implementing a new cryptographic contract protocol with the federation, and adding LDK-node support.

Speakers

Justin Moeller

Fedimint

X Nostr GitHub Website

talk

Awesome Payments: Social, AI and Stablecoins

Bob Scully

Time

Sat, Oct 12 · 11:30 AM – 12:15 PM

Location

Main Stage

Type

talk

Duration

45m

New consumer technologies are quickly driving novel applications for advanced payments. As internet native money, Bitcoin should be well positioned to dominate payments for these new consumer experiences. But just Lightning is not enough, eCash is needed to drive Bitcoin payments adoption.

Speakers

Bob Scully

Boardwalk

X Nostr GitHub Website

talk

Blind Signatures & Anonymous Credentials

nothingmuch

Time

Sat, Oct 12 · 12:45 PM – 1:30 PM

Location

Main Stage

Type

talk

Duration

45m

There are many ways of constructing e-cash systems out of cryptographic building blocks. This talk will overview some of those building blocks.

Speakers

nothingmuch

Spiral

X GitHub

workshop

Basics of Cashu Wallet development with cashu-ts

Egge

Time

Sat, Oct 12 · 12:45 PM – 1:45 PM

Location

Talks Stage

Type

workshop

Duration

1h

This workshop is a live-coding session. We will be investigating the basics of Cashu web-wallet development, using the cashu-ts TypeScript library. During the workshop I will explain fundamental Cashu concepts and how they are applied in cashu-ts.

Speakers

Egge

X Nostr GitHub Website

talk

Ark & e-cash, enemies or frens?

Steven Roose

Time

Sat, Oct 12 · 1:30 PM – 2:00 PM

Location

Main Stage

Type

talk

Duration

30m

The bitcoin payment protocol space is heating up. How do Ark and e-cash compare as alternatives for moving bitcoin around?

Speakers

Steven Roose

Ark

X GitHub

workshop

Building a Custodial Lightning Wallet the Right Way

gudnuf

Time

Sat, Oct 12 · 1:45 PM – 3:00 PM

Location

Talks Stage

Type

workshop

Duration

1h 15m

Traditional Lightning wallets offer a stark choice: complex and non-custodial or privacy-compromising and custodial. Cashu bridges this gap, enabling developers to build user-friendly Lightning-enabled apps without the usual complexities. In this hands-on workshop, with the help of cashu-ts and Replit, participants will implement sending and receiving Lightning payments while exploring privacy features, offline capabilities, multi-currency support, and user-selectable custodians.

Speakers

gudnuf

Boardwalk

X Nostr GitHub Website

talk

Hashpools: A Peer-to-peer Free Market for Bitcoin Mining

vnprc

Time

Sat, Oct 12 · 2:00 PM – 2:30 PM

Location

Main Stage

Type

talk

Duration

30m

Mining bitcoin has come to rely almost exclusively on incumbent mining pools serving as trusted third parties to produce block templates and process payouts. While the system works well enough for most miners, it still suffers from the inherent weaknesses of the trust based model. Completely decentralized mining is not really possible, since mining pools cannot avoid bending the knee to the most well capitalized pool operator. The need for capital to smooth out mining reward variance increases pool centralization, limiting the minimum practical pool size and cutting off the possibility for small casual mining, and there is a broader cost in the loss of the ability to mine UTXOs that do not pass through custodial wallets. With the possibility of block withholding, the need for trust spreads. Mining pools must be wary of their hashers, hassling them for more information than they would otherwise need. A certain percentage of fraud on the part of the mining pool cartel is accepted as unavoidable. These costs and privacy violations can be avoided by mining to a solo pool, but no mechanism exists to buy hashrate directly without a trusted party. In this talk, I propose a solution to the mining pool centralization problem using a self-hostable FOSS mining pool stack to generate ecash assets backed by mining shares. The system is robust as long as some honest pool operators, anywhere in the world, are able to host it without interference from the state.

Speakers

vnprc

Triangle BitDevs

X Nostr GitHub

talk

eCash is Obsolete: ZK is the Future

Orkun Mahir Kılıç

Time

Sat, Oct 12 · 3:00 PM – 3:30 PM

Location

Main Stage

Type

talk

Duration

30m

eCash systems were once revolutionary, but they now belong to a bygone era. As the Bitcoin economy grows, the limitations of these legacy systems become increasingly apparent. In this talk, discover why Zero-Knowledge (ZK) systems are the future, offering privacy, scalability, and decentralization. It’s time to move beyond eCash and embrace the next generation of technology.

Speakers

Orkun Mahir Kılıç

Citrea

X Nostr GitHub Website

workshop

Submarine Swaps

Thomas Voegtlin

Time

Sat, Oct 12 · 3:00 PM – 3:30 PM

Location

Talks Stage

Type

workshop

Duration

30m

A talk about submarine swaps, liquidity, and lightning

Speakers

Thomas Voegtlin

Electrum

GitHub Website

talk

Ecash: New Frontiers in Privacy

Walton, niftynei, Super Testnet, Calle, Eric Sirion

Time

Sat, Oct 12 · 3:45 PM – 5:00 PM

Location

Main Stage

Type

talk

Duration

1h 15m

Ecash can improve privacy and connectivity. Is it worth the loss of control of custody?

Speakers

Walton

bitcoin++

X Website

niftynei

bitcoin++

X Nostr GitHub Instagram Website

Super Testnet

Independent

X Nostr GitHub

Calle

Cashu

X Nostr GitHub Website

Eric Sirion

Fedimint

X Nostr GitHub Website

keynote

Day 2 Closing

niftynei

Time

Sat, Oct 12 · 4:30 PM – 4:45 PM

Location

Main Stage

Type

keynote

Duration

15m

Speakers

niftynei

bitcoin++

X Nostr GitHub Instagram Website

Time

Sat, Oct 12 · 4:45 PM – 7:30 PM

Location

Main Stage

Type

hackathon

Duration

2h 45m

Time

Sun, Oct 13 · 9:00 AM – 11:45 AM

Location

Main Stage

Type

hackathon

Duration

2h 45m

Time

Sun, Oct 13 · 12:15 PM – 1:30 PM

Location

Main Stage

Type

hackathon

Duration

1h 15m

Time

Sun, Oct 13 · 1:30 PM – 2:00 PM

Location

Main Stage

Type

hackathon

Duration

30m

Time

Sun, Oct 13 · 2:00 PM – 2:30 PM

Location

Main Stage

Type

hackathon

Duration

30m