Jason Linehan (@0x81B) / X

Jason Linehan

1,131 posts

Jason Linehan

@0x81B

Ethereum

Joined May 2021

Jason Linehan
@0x81B
Nov 27, 2022
In the wake of revelations about ConsenSys, I did a deep dive and discovered that Ethereum has been collecting Ethereum addresses for every. single. transaction. It gets worse - the addresses are just SITTING on a PUBLIC ledger, and will NEVER be deleted. What is going on??
Jason Linehan
@0x81B
Jul 13, 2023
ELI5 Thread -- what the heck is going on in this animation? Let's learn some interesting MEV stuff. 👇
SMG
@specialmech
Jul 12, 2023
A builder-searcher paid 16.8024 ETH to build block 17195495 so they could arbitrage 36 different Uniswap v3 pools. All this happened in just 12 seconds. Still think LPs are not getting rekt?
GIF
137K
Jason Linehan
@0x81B
Sep 1, 2022
Flashbots ⚡🤖 I like them. Their products work. Their research is 🔥. @thegostep's hair is ✨. I don't think of them as a competitor. They don't think of you as a competitor. But...
Jason Linehan
@0x81B
Oct 17, 2022
The @Rook relay is undergoing load testing now. We will never vertically integrate with a builder. The relay is neutral infrastructure, and allows the user full choice to broadcast to any combination of builders.
Hasu⚡️🤖
@hasufl
Oct 17, 2022
It's a failure of the Ethereum ecosystem that one month after the merge, there is still no neutral relay. All the relays that exist are vertically integrated builder relays.
Jason Linehan
@0x81B
Sep 6, 2022
Serifs are BACK
Jason Linehan
@0x81B
Apr 10, 2025
Excited to announce that @Consensys, and @Paradigm have achieved Multiple Concurrent Employers. Our first test subject is the incredible @malleshpai. Break a leg, Mallesh!
Mallesh Pai
@malleshpai
Apr 10, 2025
Update: Along with my work @Consensys/ @specialmech , I’m excited to share that I’ll be contributing @paradigm as a Research Advisor, bringing perspectives from economics, game theory and mechanism design to improving the protocol and application layers at both. (1/4)
6.6K
Jason Linehan
@0x81B
Dec 12, 2024
We will push so much economics talent onto Ethereum that it becomes the golden career path for every top performer in the field. Would you rather work on stocking warehouses for Amazon, selling ads for Google, or designing a programmable global economy at SMG?
Alex Nezlobin
@0x94305
Dec 12, 2024
Smart people from academia are moving into brypto research. On the one hand, this gets me worried - the field is becoming more competitive. On the other hand, we are well prepared. We have Uniswаp puzzles, we have brain teasers (do you tie shoe laces on or off the travelator?),
4.1K
Jason Linehan
@0x81B
Aug 12, 2022
Real CEOs are falling asleep under their desk covered in arXiv printouts on constant volatility CFMMs. I don't even know what Ibiza is. Sounds like a zkRollup.
gaut
@0xgaut
Aug 11, 2022
if your CEO is in Mykonos Or Ibiza right now it’s time to update your resume
Jason Linehan
@0x81B
Sep 17, 2022
I need devs to stop building. I can't take this anymore. Every day I am checking and it is different tech. Every day, check CT, new tech. I can't take this anymore, I have over scheduled, by a lot. It is what it is. But I need building to stop already. Can devs DO NOTHING??
Jason Linehan
@0x81B
Nov 25, 2022
Don't want to believe this. @0xttk was one of my first mentors in the industry. He encouraged change at @Rook and encouraged me personally, when I was coming up as CEO. We hadn't spoken recently. There was always tomorrow. I feel devastated for him and his family.
Jason Linehan
@0x81B
Nov 24, 2022
1/ Important to note that these screenshots don't really tell a complete story. But, it's hard to watch people who are open and welcoming and available, not even being afforded the respect of being told that the questions are to benefit a rival software client.
Artem Vorotnikov
@vorot93
Nov 23, 2022
Replying to @vorot93
Even more funny screenshots.
Jason Linehan
@0x81B
Feb 20, 2023
We need more MEV drama, as a species.
7.9K
Jason Linehan
@0x81B
Aug 7, 2022
You find the file mev.vim on a laptop abandoned at the local sauna. What are the contents of the file?
Jason Linehan
@0x81B
Jul 25, 2025
One of the most significant moments in Ethereum history happening right now. milady
Joseph Chalom
@joechalom
Jul 25, 2025
After 20 years at BlackRock and helping to lead its digital asset strategy, I’m beginning a new chapter: I’ve joined @sharplink as Co-CEO. Here’s why. At BlackRock, I helped launch: - IBIT — world’s largest Bitcoin ETP - ETHA — world’s largest Ethereum ETP - BUIDL —
2.7K