bitcoin++ writes script

talk

The Unscalability of Bitcoin

Benjamin Carman

Time

Thu, May 2 · 10:00 AM – 10:30 AM

Location

Main Stage

Type

talk

Duration

30m

Bitcoin has lots of scalability problems, from payments to ownership, and so much more. We'll break down why bitcoin has troubles scaling and how we may or may not be able to fix it.

Speakers

Benjamin Carman

Spiral

X Nostr GitHub Website

workshop

Treasure hunting mistakes on Bitcoin

Ramon Amela Milian

Time

Thu, May 2 · 10:00 AM – 10:30 AM

Location

Talks Stage

Type

workshop

Duration

30m

A hands-on introduction to the use of connectors and Winternitz signatures to locate errors in a chain of hashes. This mechanism allows for challenging arbitrary computations on Bitcoin using BitVMX, paving the way for a more decentralized connection with Rootstock.

Speakers

Ramon Amela Milian

Rootstock Labs

Website

talk

LDK: Lightning Like You Mean It

Conor Okus

Time

Thu, May 2 · 10:30 AM – 11:00 AM

Location

Main Stage

Type

talk

Duration

30m

The Lightning Development Kit (LDK) lets developers efficiently build Lightning applications. LDK is a comprehensive, open-source Lightning implementation used by dozens of projects including Lightspark, Mutiny, Cash App, and BitKit. Conor Okus will outline the SDK's capabilities, LDK Node, Lightning Network services compatible with LDK, and the current development roadmap.

Speakers

Conor Okus

Spiral

X Nostr GitHub

workshop

SV2 explained: a step towards mining decentralization

plebhash

Time

Thu, May 2 · 10:30 AM – 11:30 AM

Location

Talks Stage

Type

workshop

Duration

1h

An overview of SV2: history, why, what, how, and roadmap. Also some hands-on activity where the audience sets up pools and CPU miners.

Speakers

plebhash

Vinteum Grantee

X Nostr GitHub Website

talk

Validating Metaprotocols in Bitcoin Script w/ Covenants

Olaoluwa Osuntokun

Time

Thu, May 2 · 11:00 AM – 11:30 AM

Location

Main Stage

Type

talk

Duration

30m

Metaprotocols built on Bitcoin such as the Taproot Assets Protocol define new rules for transactions containing specific committed metadata (eg: a new leaf in the tapscript tree). A sub-class of these protocols in the client-side validation paradigm rely on special nodes that validate these transaction with auxiliary information to overlay a new consensus system on top of Bitcoin. However as Bitcoin Script isn't aware of these meta protocols, it's possible to mine a transaction that is valid for Bitcoin consensus, but invalid from the PoV of a metaprotocol. In this talk, we'll explore how we can use covenants to incrementally make Bitcoin Script aware of these metaprotocols, which unlocks the door to new scaling solution and expressibility on Bitcoin.

Speakers

Olaoluwa Osuntokun

Lightning Labs

X GitHub

talk

The State Of Bitcoin Web Development with BitScript

Jesus Najera

Time

Thu, May 2 · 11:30 AM – 12:00 PM

Location

Main Stage

Type

talk

Duration

30m

Lessons Learned & Insights Gained On How We'll Finally Keep Developers Around

Speakers

Jesus Najera

BitScript

X GitHub

workshop

How to build a compact Bitcoin index

Micaiah Reid

Time

Thu, May 2 · 11:30 AM – 12:30 PM

Location

Talks Stage

Type

workshop

Duration

1h

One of the biggest pain points we see from developers building on Bitcoin is indexing the chain. Many devs have to maintain their own index of blockchain chainstate, which can incur high storage costs and be challenging to keep up to date. Re-orgs of chainstate happen often, and every time there’s a re-org, you have to re-index the entire chain, which can be a time-intensive process. At Hiro, we built an open source indexing engine (Chainhook) that enables anyone to build consistent, reorg-proof databases that index only the information you want— creating a lighter-weight index. In this workshop, we'll show you how to create individual "chainhooks" to filter and trigger specific actions based on on-chain events.

Speakers

Micaiah Reid

Hiro Systems

X GitHub Website

talk

BitEscrow: Pioneering Non-Custodial Reversible Transactions

Tristan Bietsch

Time

Thu, May 2 · 12:00 PM – 12:30 PM

Location

Main Stage

Type

talk

Duration

30m

Escrow: the everyday, unseen guardian of almost every transaction. Discover how BitEscrow elevates crucial security with innovative, non-custodial reversible transactions — powered by our APIs and SDKs — shaping the future of Bitcoin transactions.

Speakers

Tristan Bietsch

BitEscrow

X Nostr GitHub Website

talk

Miniscript Deep Dive

Rob Hamilton

Time

Thu, May 2 · 1:30 PM – 2:00 PM

Location

Main Stage

Type

talk

Duration

30m

Presentation about Miniscript Fragments, Types, and Properties

Speakers

Rob Hamilton

AnchorWatch

X Nostr GitHub

Time

Thu, May 2 · 1:30 PM – 2:00 PM

Location

Talks Stage

Type

talk

Duration

30m

Ark brings Bitcoin lending to reality: why would I borrow Bitcoin?

talk

Miniscript for Developers

Randy Naar

Time

Thu, May 2 · 2:00 PM – 2:45 PM

Location

Main Stage

Type

talk

Duration

45m

Diving into Miniscript doesn't have to be daunting. In this talk you'll learn the basics of the Miniscript language, the benefits of using it over traditional Bitcoin Script, and how you can use it in your own applications. I'll also share the challenges I encountered with existing Miniscript libraries and explain the motivation for developing my own.

Speakers

Randy Naar

Blockstream // Greenlight

X GitHub

talk

Splice Is Nice(r) with Splice Script!

Dusty Daemon

Time

Thu, May 2 · 2:00 PM – 2:45 PM

Location

Talks Stage

Type

talk

Duration

45m

A talk about the latest “scripting” language coming to Core Lightning to help make complex splices a reality for lightning!

Speakers

Dusty Daemon

core-lightning

X Nostr GitHub Website

talk

(Mini)Scripting in covenant world

Sanket Kanjalkar

Time

Thu, May 2 · 2:45 PM – 3:30 PM

Location

Main Stage

Type

talk

Duration

45m

We will discuss how complex scripting could look like with different covenant opcodes. Note: This is not an endorsement of any opcode proposal.

Speakers

Sanket Kanjalkar

Block

X GitHub

talk

Quirky Covenants

Brandon Black (reardencode)

Time

Thu, May 2 · 2:45 PM – 3:30 PM

Location

Talks Stage

Type

talk

Duration

45m

A forward and backward look at the ways various covenant proposals overlap, interact, and sometimes do surprising things. We'll touch on SIGHASH_ANYPREVOUT (BIP118), OP_CHECKTEMPLATEVERIFY (BIP119), OP_CHECKSIGFROMSTACK(VERIFY), OP_VAULT(RECOVER) (BIP345), OP_CHECKCONTRACTVERIFY, and OP_CAT. Did you know that OP_VAULT is recursive? Did you know that OP_CHECKTEMPLATEVERIFY+OP_CHECKSIGFROMSTACK has many of the same benefits as SIGHASH_ANYPREVOUT and then some bonuses? Can OP_CAT alone enable Lightning Symmetry channels? These questions and more will be answered as we explore quirky covenants.

Speakers

Brandon Black (reardencode)

Ngu Services LLC

X Nostr GitHub

talk

Panel: Tooling Script

Dusty Daemon, Jesus Najera, Rob Hamilton, Topher Scott

Time

Thu, May 2 · 4:00 PM – 4:45 PM

Location

Main Stage

Type

talk

Duration

45m

The scripting landscape is quickly evolving, and along with it the tools for

Speakers

Dusty Daemon

core-lightning

X Nostr GitHub Website

Jesus Najera

BitScript

X GitHub

Rob Hamilton

AnchorWatch

X Nostr GitHub

Topher Scott

BitEscrow

X GitHub

workshop

Simphony: High-level Simplicity

Christian Lewe

Time

Thu, May 2 · 4:00 PM – 4:45 PM

Location

Talks Stage

Type

workshop

Duration

45m

Simplicity is the future of Bitcoin smart contracts. The language brings arbitrary computation without loops and formal correctness to the blockchain. However, Simplicity is hard to write, like Assembly. Simphony is a high-level language, like Rust, that compiles to Simplicity. In my talk, I will introduce you to Simphony and to the web IDE that runs Simphony in the browser. Start Simplicity development today on your phone!

Speakers

Christian Lewe

Blockstream Research

X GitHub

talk

sighash_noinput, a history

Christian Decker

Time

Thu, May 2 · 4:45 PM – 5:15 PM

Location

Main Stage

Type

talk

Duration

30m

What is sighash_noinput? Where did it come from? How did it come to be known as APO? In this talk Blockstream’s Christian Decker will walk us through the the evolution of BIP118 over the years, giving us a good picture of where the proposal stands now.

Speakers

Christian Decker

Blockstream // Greenlight

X GitHub

talk

Ice, Ice, Maybe? OPVAULT and reactive security for your cold storage

Kody Low

Time

Thu, May 2 · 4:45 PM – 5:15 PM

Location

Talks Stage

Type

talk

Duration

30m

Locking your coins up into a vault is one proposal for updating script (OP_VAULT). How does this work and why should you ice your coins with vaults?

Speakers

Kody Low

Fedi

X Nostr GitHub Website

talk

CAT, Scripts and Lamport Sigs

Andrew Poelstra

Time

Thu, May 2 · 5:15 PM – 5:45 PM

Location

Main Stage

Type

talk

Duration

30m

In 2021, Jeremy Rubin showed that it is possible to do 32-bit Lamport signatures in Bitcoin Script, without any changes to the network. This development, while independently interesting for some oracle applications, has really shown its value by its use in BitVM, an aggressively ambitious project by Robin Linus to do arbitrary computations in Script by splitting them across dozens of transactions indexing billion-entry Merkle trees. The core idea is that we can think of Lamport signatures as indexing a sort of "global key-value store" supporting single writes and erasures, where each entry has an owner. We discuss this idea, as well as how it generalizes using OP_CAT beyond 32-bit values to "real" signatures, commitments to Merkle trees, and more.

Speakers

Andrew Poelstra

Blockstream Research

X GitHub Website

talk

OP_EXPIRE

Peter Todd

Time

Thu, May 2 · 5:15 PM – 5:45 PM

Location

Talks Stage

Type

talk

Duration

30m

Why it can be useful to make outputs impossible to spend after a deadline, and how we can make this reasonably reorg safe.

Speakers

Peter Todd

OpenTimestamps

X Nostr GitHub Website

workshop

Coinjoin & Bitcoin Script

Super Testnet

Time

Fri, May 3 · 10:30 AM – 11:30 AM

Location

Main Stage

Type

workshop

Duration

1h

Write coinjoin software and learn the scripts that help you do it

Speakers

Super Testnet

Independent

X Nostr GitHub

workshop

FROSTy Brews: Protocol Augmentations

Jesse Posner

Time

Fri, May 3 · 10:30 AM – 12:30 PM

Location

Talks Stage

Type

workshop

Duration

2h

A guided tour through a series of protocols that are compatible with FROST: proactive secret sharing, Taproot and BIP32 key tweaking, participant enrollment/disenrollment, share repairability, MuSig2 nesting, and adaptor signatures.

Speakers

Jesse Posner

Bitkey

X Nostr GitHub

workshop

sMATT contracts, zero to hero

Salvatore Ingala

Time

Fri, May 3 · 11:30 AM – 12:30 PM

Location

Main Stage

Type

workshop

Duration

1h

How to go from idea to Bitcoin smart contracts using OP_CHECKCONTRACTVERIFY

Speakers

Salvatore Ingala

Ledger

X Nostr GitHub

Time

Fri, May 3 · 4:00 PM – 6:30 PM

Location

Main Stage

Type

hackathon

Duration

2h 30m

hackathon

Presentations

Justin Moon, Buck Perley, Benjamin Carman

Time

Sat, May 4 · 3:00 PM – 4:00 PM

Location

Main Stage

Type

hackathon

Duration

1h

Speakers

Justin Moon

Fedi

X Nostr GitHub Website

Buck Perley

FromA2B

X Nostr GitHub Website

Benjamin Carman

Spiral

X Nostr GitHub Website

hackathon

Hackathon Awards

Coinicarus, Walton, Dusty Daemon, Super Testnet

Time

Sat, May 4 · 4:30 PM – 5:00 PM

Location

Main Stage

Type

hackathon

Duration

30m

Speakers

Coinicarus

Pleb Underground

X Nostr Website

Walton

bitcoin++

X Website

Dusty Daemon

core-lightning

X Nostr GitHub Website

Super Testnet

Independent

X Nostr GitHub