blockstream_official

bitcoin

Core Lightning v25.09 “Hot Wallet Guardian” is here!

Bookkeeper, first introduced to CLN as a plugin by Lisa Neigut in 2022, is now fully integrated! It offers real-time visibility into payments, fees, and channel activity, making node management more transparent. 🧵⬇️

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This release upgrades xpay with support for BIP353 “at-user” payment addresses (like cln@blockstream.com), making Lightning more human-friendly. Splicing is smoother and Reckless now supports Python plugins.

Since v25.05, Core Lightning has merged 321 commits in 76 days. A warm welcome to 4 first-time contributors who are helping CLN continue evolving with more stability, usability and developer power. Onward. ⚡

Read the full release blog: https://blog.blockstream.com/core-lightning-v25-09-hot-wallet-guardian/

Core Lightning v25.09: “Hot Wallet Guardian” is LIVE ⚡️

In 2017, Blockstream set out to develop a smart contract language that outperforms Bitcoin Script and EVM, offering more expressiveness with stronger safety assurances. Eight years later, we believe we have achieved this with Simplicity.

With the arrival of Simplicity on the Liquid Network mainnet today, we now have, for the first time, a clean foundation for serious financial applications, free from the complexity and patchwork of risks that defined the last era of DeFi.

https://blog.blockstream.com/simplicity-launches-on-liquid-mainnet/

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Simplicity Launches on Liquid

From first sats to advanced custody, it brings self-sovereignty into reach no matter where you start.

Now available on Android and iOS @ blockstream.com/app

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Self-custody shouldn’t feel like a cliff.

The Blockstream App makes it a journey guiding you from PIN to full seed phrase, at your pace. Learn more in the full blog.

https://blog.blockstream.com/introducing-the-blockstream-app-the-bitcoin-wallet-that-grows-with-you-2/

📱 Download the Blockstream App: a new Bitcoin wallet that grows with you

The Blockstream Explorer API has been quietly powering some of your favorite Bitcoin and Liquid Network apps, wallets, tools, and services you use every day!

Have a look at who’s already building on it: Nunchuk, Aqua Bitcoin, Bitcoin Dev Kit, Sparrow Wallet, Electrum Wallet, Blockstream Green, SideSwap, Specter Wallet.

https://youtu.be/u9pmwQGQp2c

🧭 Blockstream Explorer API: Powering Bitcoin & Liquid Apps Behind the Scenes

From launching institutional funds and Jade Plus to advancing Simplicity, rolling out BOLT12 on Core Lightning, launching the Blockstream Explorer API, and running Liquid dev bootcamps, Q1 2025 was packed.

Catch up on everything we shipped ⬇️
https://blog.blockstream.com/blockstream-quarterly-update-q1-2025/

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Blockstream Quarterly Review Q1 2025

The Liquid Network world tour to empower developers with Bitcoin layer-2, Liquid & Lightning continues! Free to attend. More dates and cities soon:

✅ Viareggio, IT
✅ Taipei, TW
✅ San Salvador, SV
✅ Buenos Aires, AR
🔲 Turin, IT [April 15–17]
🔲 Plovdiv, BG [May 17–18]

https://liquid.net/bootcamp

https://youtu.be/smgRO5lnB24

Liquid Developer Bootcamp World Tour: Next Stops – Turin and Plovdiv 🌊 ⚡️

The Blockstream Explorer API self-service dashboard is now live. 🧭

Developers can sign up, generate API keys, track usage, and manage billing all in one place.

This makes accessing reliable Bitcoin and Liquid blockchain data easier than ever.

Try it out today: https://dashboard.blockstream.info/

https://youtu.be/TEBkjNaTm8c

🧭 Blockstream Explorer API: Instantly Generate Keys & Start Building Today!

Announcing Core Lightning v25.02, "Onion Packet Filler Accreditation"!

With 242 commits from 21 authors in 68 days, this maintenance release brings key updates for users, developers, and the network, enhancing stability and functionality.

https://m.primal.net/PbNi.gif 

Dive deeper into the updates!

Read the full blog post on CLN v25.02 to learn more about the new features and improvements for users, developers, and the network.

https://blog.blockstream.com/core-lightning-v25-02-onion-packet-filler-accreditation-2/

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CLN v25.02 "Onion Packet Filler Accreditation" is LIVE! ⚡️

ICYMI: Blockstream is championing a new grant for Bitcoin layer-2 projects building with the Lightning and Liquid networks at our Lugano-based research hub.

Get the space, support, and resources to develop your passion project—fast. ⚡️🌊

Apply now --> https://blockstream.typeform.com/to/KLeflywl

Opportunity details:

🌊 CHF 10,000 sponsorship for a founder or small startup team to live in Lugano.

⚡️ Work closely alongside the Blockstream team on-site for technical expertise and guidance.

🌊 Take your idea to market with a dedicated workspace for designing, prototyping, and launching your product in record time.

Apply Now: Build with Blockstream at the New Lugano Research Hub! 🏗️

Starting Nov 29 at 12:00 EST, be online for our biggest sale of the year! 

Buy two Jades and get the second one for 50% off. Plus, enjoy free shipping across North America and Europe. 🌎🌍 


Black Friday Alert! Buy 2 Jades, get 50% off the second + free shipping 🇺🇸🇪🇺

Starting today, our fully open-source hardware wallet, Blockstream Jade supports Miniscript. 

Use timelocks and more complex multisig arrangements for greater peace of mind and planning by pairing Jade with the Liana Bitcoin wallet.

Full details.

https://blog.blockstream.com/blockstream-jade-adds-support-for-miniscript/
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✍️ Blockstream Jade Adds Support for Miniscript 🔒

In the latest from Blockstream Research, Andrew Poelstra summarizes the past six months of innovation in Bitcoin Script, including Miniscript, Lamport signatures, BitVM, OP_CAT and discusses where they intersect.

https://blog.blockstream.com/script-state-from-lamport-signatures/
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🔑 Script State From Lamport Signatures

Is OP_CAT happening?

The covenants proposal was recently assigned BIP 347, and now it's up to the community to decide. Blockstreamer Kiara Bickers breaks down the pros and cons and attempts to answer the question on most Bitcoiners' minds: Is it safe?

https://blog.blockstream.com/op_cat-the-purr-fect-solution-for-covenants/

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🐱 OP_CAT: THE PURR-FECT SOLUTION FOR COVENANTS?

The v24.05 release of Core Lightning, codenamed "The Infinitely Divisible Satoshi," is now final!

v24.05 focuses on stability and QoL improvements, as well as addressing pain points around the pay command and recent gossip updates. Other updates include:

⚡️renepay plugin refactored
⚡️file descriptor limit is now auto-increased
⚡️faster block processing while synchronizing
⚡️massive documentation overhaul for RPCs

See all updates in the latest release blog👇

https://blog.blockstream.com/core-lightning-v24-05-the-infinitely-divisible-satoshi/

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⚡️ Core Lightning v24.05 "The Infinitely Divisible Satoshi" ➗

In March, the European Bitcoin-only Relai app activated non-custodial Lightning transactions through Greenlight. Now, it has scaled its offering to over 100,000 users. Learn about the integration process, challenges, and solutions in this case study.

https://blog.blockstream.com/case-study-relais-integration-of-greenlight-by-blockstream/
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⚡️ Case Study: Relai's Integration of Greenlight by Blockstream

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As we enter a new era powered by Bitcoin, those who have historically been left behind could lead the charge in scaling financial trust (by disintermediating it) not just locally but on a global scale. In doing so, they would transform from their status as outsiders into outstanding examples for us all of how to build fairer and more inclusive financial systems.

The latest from the Blockstream BD team, which dissects the writings of Nick Szabo and others:
https://blog.blockstream.com/scaling-trust-bitcoins-role-in-bridging-the-global-digital-divide/

🌐 Scaling Trust: Bitcoin’s Role in Bridging the Global Digital Divide


Episode #40 of Blockstream Talk with Relai app CTO Adem Bilican is out now! Tune in as host Jesse Knutson discusses the integration of non-custodial Lightning for over 100K European customers utilizing Greenlight. 

🎧 Listen: https://tinyurl.com/blockstreamtalk40
📺 Watch: https://youtu.be/a2tVgHiY0f4

⛈️ Relai's Non-Custodial Lightning Integration with Greenlight - BT #40

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Grassroots outreach and action, especially through local Bitcoin meetups, have been instrumental in transforming Bitcoin from a niche technology into a permanent fixture in finance.

Bitcoin's narrative is not shaped, for example, by an official marketing department or spokesperson, but by the persistent efforts of everyday people like you. This is why we are launching Blockstream Local, a new initiative designed to empower communities with the necessary tools and support to carry forward the legacy of grassroots Bitcoin education.

By joining Blockstream Local, your meetup will receive curated education resources, early access to new Blockstream products, and the ability to create a revenue stream, all of which can significantly amplify impact in your local community.

Read more and learn how to register today:

https://blog.blockstream.com/blockstream-local-meetup-support-and-grassroots-bitcoin-education/

📍 Blockstream Local: Meetup Support and Grassroots Bitcoin Education

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As the Liquid Network's technical provider, Blockstream is committed to making it easier to build on Liquid and the broader L2 ecosystem. These recent development efforts have culminated in the new Liquid Wallet Kit (LWK), a collection of Rust tools to build Liquid wallets.

The aim of LWK is to provide all the necessary building blocks for Liquid wallet applications development and simplify the life of developers by addressing common pain points of the current tooling. We want LWK to be a reference tool that can help reduce friction for Liquid integration, define ecosystem standards and productionize Liquid innovation.

Read more about what you can build with LWK today:

https://blog.blockstream.com/lwk-liquid-wallett-kit/

🧰 LWK: Liquid Wallets Made Easy 🌊

Check out episode #39 of Blockstream Talk! Host Jesse Knutson chats with Andrew Howard and Raúl Velasquez from JAN3 about Aqua wallet's innovative approach to Tether and Bitcoin. Discover JAN3 Financial's role in driving institutional adoption and its influence on global policies. Plus, get the scoop on Aqua's upcoming BTCmap integration and collaboration with Botev Plovdiv.

🎧 Listen: https://tinyurl.com/blockstreamtalk39
📺 Watch: https://youtu.be/i1kxB7JnX84

🎧 Streamlining BTC Layer-2 Payments Using Liquid and Lightning On Aqua Wallet

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Calling all developers! We're on a mission to refine our SDKs, libraries and dev resources. Share your experiences in our quick survey. Your insights drive our improvements! ⬇️

https://community.corelightning.org/c/developers/feedback-for-blockstream-sdks-libraries-dev-resources