From hacking on Frigate at the 2140 Silent Payments Dev Week last September, to having a full production stack! A huge thanks to @SparrowWallet for collaborating with us on Silent Payments 🤫🐦
Sparrow v2.5.0 released with:
Silent Payments (SP) wallets
SP-capable Frigate public server @2140_dev
bitview.space fee rates source
sparrowwallet.com/download
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Our first annual report is out! 📄
2025, our inaugural year was full of progress, challenges and lessons learned. 🛠️
We believe in building in the open. This is our story so far.
📖 Read it here on our brand new substack: 2140blog.substack.com/p/our-…
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Did you know you can build a stick visualization of your mempool clusters and fee estimation using the getmempooldiagram RPC?
Did you know that if you also include PR #34075 you can see how accurate the fee estimation for previous blocks was?
Sadiq knew, be like Sadiq 🏗️🚢
bitcoincorefeerate.com
github.com/2140-dev/bitcoin-…
- Visualize fee rate estimates for some confirmation target
- Benchmark accuracy against confirmed blocks
- Cluster Mempool feerate diagram
Next up: benchmarking against other estimators?
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* The previous tweet may contain historically inaccurate information, but our Rob is great nonetheless.
** If you don't agree with the council's decision, you can take it with @Rob1Ham and @robertwarren.
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Our Rob is not Rob the great*, but he is a great Rob, a devoted Rob. He's a dont-have-a-twitter-account Rob, a focused Rob. A speed-up-your-ibd Rob, a true committed Rob. He's been approved by the council of Robs**, a top notch Rob.
We’re funding a guy named Rob via @2140_dev that they’ve assured us is a top notch Rob. He’ll be improving Core by speeding up initial block downloads using SwiftSync, continuing Kyoto work, adding integrations with LDK Node, Bull Bitcoin, Cove, and more
github.com/rustaceanrob/
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⚡️SAVE THE DATE⚡️
️
When: Oct 23 • Where: 2140 • What: </time2build>
Join Jesse from @breez_tech to learn about the </time2build> challenge and how to build with the Breez SDK.
Follow the link or DM @WitDeJesse for details.
luma.com/k3h70fvy
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🫶💛🖤
You know what’s frustrating? When you’ve got the skills, the drive, and the ideas to make an impact, but the only thing stopping you is a border stamp.
That’s the reality for so many brilliant Bitcoin developers across Africa and the Global South. They can write world‑class code, contribute to open‑source, and push the ecosystem forward, but collaborating in person with global peers or speaking on major stages? Too often, visa challenges make that impossible.
We’ve decided that can’t be where the story ends. That's why we created the Pull Partnership; a way to place our grantees directly inside top Bitcoin teams around the world, where they can learn, share, and grow without barriers holding them back.
The idea started when our grantee, @sadeeq_ismaela, joined @ChaincodeLabs in New York 🇺🇸 last year. He spent time working alongside leading Bitcoin developers, gaining hands-on experience and navigating the visa maze. That success made us think: what if we made this kind of opportunity a standard part of our grant ecosystem?
Fast forward to this year. We’ve just piloted the Pull Partnership with @2140_dev in Amsterdam 🇳🇱.
We’ve paired the Btrust‑funded developers with their team, covering salaries, relocation costs, and visa support, while 2140 provided mentorship, career development, and access to key Bitcoin industry events.
We’d like to say a huge thank you to @josibake, @SomsenRuben and the @2140_dev team for making this partnership a reality.
Learn more about the Pull Partnership here: blog.btrust.tech/introducing…
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