Built on Core Lightning and powered by the VLS Project, Greenlight shows how to implement Lightning infrastructure without custody risk:
✅ Professionally managed nodes
✅ Validated signing on user devices
✅ APIs for wallets and services to go self-custodial
Read the full custody-model report:
Tune in Monday at 12pm ET.
https://www.youtube.com/live/fnay8Rdodwk?si=M9qWiH4gNMv-DiYb
What you're seeing: A transaction spending from a Simplicity program.
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To understand why this matters, consider what causes most DeFi hacks:
- Ambiguous conditions
- Unchecked assumptions
- Logical edge cases that humans miss
Audits catch some of these, but not all.
Simplicity eliminates ambiguity at the language level.
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How does it work?
Simplicity is designed to be mathematically rigorous and predictable.
As a low-level functional language, it allows mechanical reasoning about behavior, with proofs verifiable before any on-chain deployment.
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General-purpose languages are great for flexibility, but that flexibility comes at a cost: ambiguity.
A single unchecked assumption in a general-purpose contract can have systemic financial consequences.
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Simplicity was engineered for high-assurance financial programming, where correctness, termination, and behavior can be *proven* before deployment.
Its semantics are clear, and its outcomes deterministic.
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The goal isn’t “more expressive” smart contracts.
It’s contracts that can’t fail silently, because they’ve been verified to work exactly as intended.
That’s the difference between general-purpose code and high-assurance engineering.
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Simplicity was launched on the @Liquid Network July 31, 2025 and has been live since.
Further integrations are underway for:
- AMP - Enabling verifiable issuance and asset control
- Enterprise Custody Solutions (ECS) - providing proof-backed execution paths for institutional custody workflows
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Simplicity prioritizes reliability over expressiveness. Rather than expanding complexity, it establishes a verifiable foundation.
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In short:
Simplicity moves smart contracting from “we think this is secure” to “we can prove it is.”
The Future of Finance Runs on Bitcoin
👉 Learn more:
See a recreation of the moment Satoshi reached out to @Adam Back about Hashcash to cite in the Bitcoin whitepaper, an email exchange that helped lay the foundation for proof-of-work and the entire Bitcoin network.
“The root problem with conventional currency is all the trust that’s required to make it work.”
— Satoshi Nakamoto, Bitcoin Whitepaper
Secure your stack without a trusted third party.
https://store.blockstream.com/products/jade-plus
The blueprint for freedom is still hosted on Blockstream servers.
Reread it today and remind yourself what Bitcoin is built on.
🔗 https://blockstream.com/bitcoin.pdf
If you build on Bitcoin, you’ll want front row.
@Adam Back joins Olaoluwa Osuntokun, Federico Tenga and @Stephan Livera to talk “Assets on Bitcoin” leveraging platforms like the @Liquid Network , Bitfinex, and Lightning.
Oct 24 · 2:30 PM · P2P Stage · Lugano Plan B
Not your keys, not your coin!
Blockstream's Alessandro Sagli walks through how to manage your Bitcoin with Jade from setup to full control.
2:30 PM · Custody Room · Spazio 21
Self-custody starts with true randomness. 🎲
Join Blockstream hardware engineer Valerio Vaccaro on the Italian stage at Lugano Plan B for a live session on “Entropy Generation with Dice.”
🗓️ Oct 25 · 16:00–17:00 · Custody Room
Valerio will also break down SHA256 and show how a mini-miner brings Bitcoin’s proof of work to life.
2:30 PM and 4:00PM · Mining Room · Lugano Plan B
Balance shows zero? Don’t panic.
Blockstream’s Alessandro Sagli walks through the most common failure modes in Bitcoin custody and how to recover your funds safely.
10:30 AM · Spazio 21
Join Jade Engineers Valerio Vaccaro and Riccardo Casatta for “Master of the Keys”.
A hardware wallet multisig masterclass from innovators in the industy.
Oct 25 · 2:00 PM · UTXO Room
Sound money changes how companies think.
@Adam Back takes the stage with Jack Mallers, Paolo Ardoino and @preston to explore “The Evolution of Corporate Treasuries: Embracing Bitcoin”
Oct 25 · 2:30 PM · WAGMI Stage
Your node defines your view of Bitcoin. It’s how you connect, verify, and interact with the network.
Leonardo Comandini explains how to choose and configure the right setup for your stack.
2:30 PM beginners 4:00PM Advanced · Nodes Room · @Spazio21
Blockstream @Liquid Network Engineer Leonardo Comandini joins Frederico Tenga, @tiero, Bit Walt and Mattia to discus Digital assets on Bitcoin.
Oct 25 · 3:30 PM · Patio · Spazio21 Italian Language
Join key Core Lightning contributor and Greenlight Principal Engineer Christian Decker for a panel with Olaoluwa Osuntokun, @Roy, and John Carvalho as the delve “Inside Lightning Implementations”
Moderator: @ODELL
Oct 25 · 5:00 PM · P2P Stage
Capital markets are moving towards tokenization on platforms like the @Liquid Network and Bitfinex Securities.
@Adam Back joins Gabor Gurbacs, Jonathan Krane and Jesse Knutson to discuss how transparency and settlement shift when finance runs on Bitcoin.
Oct 25 · 5:15 PM · WAGMI Stage
Two-factor authentication in Bitcoin multi-signature setups is a powerful, modern security method that Blockstream pioneered years ago.
In this release, 2FA (on Android) is faster to configure, easier to recover, and more clearly organized improving security while removing friction for everyday use.
Better UX is key to our mission of making the Blockstream app the complete Bitcoin platform.
This release offers a cleaner, more intuitive UI for more advanced flows like watch-only wallets. Bitcoin and @Liquid Network accounts can now be imported more easily, with automatic detection on Android and iOS.
Since 2016 Blockstream has been building the open-source foundations of Bitcoin wallets and infrastructure, and we continue funnelling it all into the Blockstream app so individuals everywhere can be empowered by Bitcoin self-custody.
