Founder @ https://xitter.cf/t.co/AXFc7FL7a2 Research @ https://xitter.cf/t.co/qICoS6GIWg Scientist @ https://xitter.cf/t.co/NjacOntCQw Prior: Founded https://xitter.cf/t.co/biZvtuT8Ei Designed https://xitter.cf/t.co/f2xsuAqtl0 - All opinions are mine
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Sergio Demian Lerner (sergio.lerner.rsk) retweeted
Fairgate's @SDLerner is heading to @labitconf 2026!
On Friday, he'll introduce Bit2, a Bitcoin Layer 2 designed for autonomous agentic commerce.
On Saturday, he'll join a panel on Bitcoin governance and decentralization.
See you there!
labitconf.com/speakers/sp139
Sergio Demian Lerner (sergio.lerner.rsk) retweeted
¿Qué te parece una L2 de #Bitcoin diseñada para el comercio entre agentes de IA? 🤖
En este interesante taller impartido por @SDLerner durante @labitconf podrás conocer a fondo el proyecto #Bit2 👀
🗓️ Viernes 30 de octubre
🕝 15:50 – 16:30
🇦🇷 Costa Salguero, Buenos Aires.
Another great issue about BitVM, Garbled Circuits, and all science advancements in Bitcoin L2s.
A new edition of Computing on Bitcoin News is out!
Catch up on the latest research, developments, and conversations shaping Bitcoin's evolving technical ecosystem.
Read it here ↓
fairgate.io/newsletter/compu…
A paper that I paused in 2025... and now I can finish much faster with the help of AI:
xitter.cf/bitvmx/status/21107943…
New research from Fairgate's CTO, @SDLerner: FlatMerkle.
The paper introduces a way to achieve compact, logarithmic-size inclusion proofs using a single linear hash stream, without requiring a traditional Merkle tree.
Read the paper: eprint.iacr.org/2026/2468.pd…
Sergio Demian Lerner (sergio.lerner.rsk) retweeted
New research from Fairgate's CTO, @SDLerner: FlatMerkle.
The paper introduces a way to achieve compact, logarithmic-size inclusion proofs using a single linear hash stream, without requiring a traditional Merkle tree.
Read the paper: eprint.iacr.org/2026/2468.pd…
Sergio Demian Lerner (sergio.lerner.rsk) retweeted
ICYMI, we recently shared the story of how Bit2 came to life.
From testing Lightning for agentic payments to realizing Bitcoin needed a new approach, we take a look at the research, challenges, and decisions that led us to build Bit2.
Catch up on the full story: fairgate.io/post/56-the-hist…
When I designed a hardware wallet in 2013, I placed the electronics it in a transparent acrylic case:
coindesk.com/markets/2013/06…
Protecting from tampering in the supply chain was essential.
I hope all hardware wallet manufacturers start offering transparent devices.
bitcointalk.org/index.php?to…
Sergio Demian Lerner (sergio.lerner.rsk) retweeted
Cardamom Community Call Teaser xitter.cf/i/broadcasts/1aJbdEQWd…
Sergio Demian Lerner (sergio.lerner.rsk) retweeted
What if scaling Bitcoin isn’t about making it do more, but making it better at securing what gets built on top?
Sergio Demian Lerner (sergio.lerner.rsk) retweeted
Coinspect is now a Ledger security audit partner for Ledger wallet apps!
As one of Ledger's approved audit partners, we bring our crypto and embedded security expertise to help developers find and fix vulnerabilities before release.
Building a Ledger app? Let's talk.
Sergio Demian Lerner (sergio.lerner.rsk) retweeted
A new edition of Computing on Bitcoin News is out!
Catch up on the latest research, developments, and conversations shaping Bitcoin’s evolving technical ecosystem.
Read it here ↓
fairgate.io/newsletter/compu…
Sergio Demian Lerner (sergio.lerner.rsk) retweeted
In mid-2025, the Fairgate team ran the numbers on the Lightning Network as an agentic payment rail: transaction costs, locked collateral, routing complexity, payment success rates, mass-exit safety.
The conclusion was hard to accept. Lightning, for all its contributions to Bitcoin, couldn't economically compete with centralized rails like Base or Tempo for machine-to-machine commerce at scale.
So the choice became binary: let centralized companies own the agentic economy, or build Bitcoin a new Layer 2 from first principles.
That's where Bit2 started. The full history can be found here: fairgate.io/post/56-the-hist…
Sergio Demian Lerner (sergio.lerner.rsk) retweeted
LIVE NOW:
@SDLerner and @stonychambers join @jakefentonBTC on BFC LIVE!
xitter.cf/i/broadcasts/1qxvveOWB…
Sergio Demian Lerner (sergio.lerner.rsk) retweeted
New in Wang World: Equations 🔢
Match the edges, then balance every line:
↔ Rows add left + right
↕ Columns add top + bottom
Correct totals turn green. Wrong totals turn red.
Can you solve Crosswise Ledger?
wangworld.club/puzzle/crossw…
#PuzzleGames
Sergio Demian Lerner (sergio.lerner.rsk) retweeted
“Without a time-delay lock, a single validation bug and a total loss become the exact same event, because funds move the moment software says ‘yes.’”
@RootstockLabs Co-founder and Scientific Advisor @SDLerner spoke to @cryptodotnews about why time-delay locks matter for Bitcoin bridge security, and how @rootstock_io's PowHSMs use a 4,000-block (~36 hour) delay before signing a peg-out.
Time can be a security control.
crypto.news/bitcoin-time-del…
Sergio Demian Lerner (sergio.lerner.rsk) retweeted
New in Wang World: Bumps & Dents. 🧩
Directional tiles can now be read as monochrome interlocking silhouettes. Each edge identity has its own shape, and every protrusion fits exactly into its matching recess.
Try it: wangworld.club/
#WangTiles #PuzzleGame
A very clear explanation of Rootstock's time delay lock...
Why does Rootstock wait ~36 hours before signing a peg-out?
Because bridge security is not just about moving bitcoin:native. Rootstock’s PowPeg was designed around that reality, with multiple independent safeguards.
That’s one of questions we answer in our new PowPeg security FAQ 👇
rootstock.io/blog/rootstock-…
Some headlines (in Spanish) have described the depletion of (confirmed) UTXOs in Rootstock as a “bank run.”
That’s false. Don’t fall for it.
Rootstock continues operating normally.
This is a temporary UTXO-management issue caused by the way the PowPeg processes peg-outs.
Small peg-ins will create additional UTXOs, enabling more peg-outs to be processed in parallel and restoring normal processing times.
New UTXOs are already being created. I estimate that everything will be back to normal within approximately 10 hours.
If anything, its proof the peg is operating as expected and I anticipate the unmatched security of Rootstock will drive more users to it.