Jihoon Song Profile
Jihoon Song

@jih2nn

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208
Following
156
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26
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289

Joined June 2021
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@jih2nn
Jihoon Song
9 hours
Cooking something. Slot time transitions from 12s to 6s after slot 32 (epoch 1) šŸ‘€. ā±ļø 6-second slots
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@jih2nn
Jihoon Song
6 days
RT @ladislaus0x: This is your chance to ask EF researchers and developers directly. The EF Protocol teams are hosting a Reddit AMA on Augus….
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@grok
Grok
2 days
What do you want to know?.
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@jih2nn
Jihoon Song
8 days
@Sib_Katya is having an internal team review of her beacon metrics work and will share a HackMD article by the end of this week.
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@jih2nn
Jihoon Song
8 days
Tests that are independent of the upcoming rebases will be added such as IL committee assignment and IL processing logic including equivocation handling. These will be done in parallel with implementation updates.
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@jih2nn
Jihoon Song
8 days
On the implementation side, we have two main tasks ahead of us: rebasing onto Fulu and reflecting changes in the queue for engine APIs. As the engine API changes are breaking changes and no further breaking changes are expected to be required to merge FOCIL onto ePBS, we will.
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@jih2nn
Jihoon Song
8 days
Both the spec and implementation will rebase onto Fulu and remain there until FOCIL is SFI’d. Until then, testing will keep making progress.
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@jih2nn
Jihoon Song
8 days
We got CFI’d for Glamsterdam! This is a great opportunity to acknowledge all the support from the community and the researchers and developers who have been working on FOCIL. But it’s not over until we ship it. Let's keep pushing FOCIL to make sure it doesn’t delay Glamsterdam.
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@jih2nn
Jihoon Song
8 days
FOCIL, but CFI’d. Here are FOCIL breakout #17 takeaways 🧵.
@ECHInstitute
ECH Institute Inc.
9 days
šŸ“¢ Join FOCIL Breakout #17!. šŸ—“ Tuesday, Aug 12, 2025, at 14:00 UTC.šŸ“ŗ Live on @ECHInstitute X/Twitter😺. Topics: FOCIL rebase (onto Fulu and ePBS), FOCIL testing and more!. Don't miss it! ✨.
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@jih2nn
Jihoon Song
9 days
RT @apolynya: @solana Nasdaq's SIP is designed to handle 10 million operations per second, with a latency of 0.02 milliseconds (though real….
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@jih2nn
Jihoon Song
9 days
Ethereum Prize in Literature August 2025 šŸ….
@weboftrees
Anders Elowsson 🌻
10 days
🧵Introducing EIP-7999: Unified multidimensional fee market. Ethereum is like a supermarket with one inventory label. There are 45M eggs, 45M cheese, 45M snacks. etc, but everything scans as "1 food". To avoid empty shelves, it closes once 45M food has been sold during the day.
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@jih2nn
Jihoon Song
10 days
RT @mehdi_aouadi_: Great write up about FOCIL from a CL perspective! No wonder FOCIL is CFI'd for Glamsterdam šŸš€.
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@jih2nn
Jihoon Song
14 days
FOCIL has CFI’d and ePBS got SFI’d for Glamsterdam. As yet another Ethereum developer who champions FOCIL and used to contribute to ePBS, this is truly amazing. But it ain't over till it's over. Let’s keep pushing FOCIL until it gets shipped. Hugh thanks to the community who
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@jih2nn
Jihoon Song
14 days
Here is the next article on the complexity of FOCIL for the CL. It walks through major changes through the lens of the IL lifecycle and demonstrates how it can be rebased on top of ePBS. I will give a short presentation on FOCIL in Glamsterdam from a purely technical perspective.
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@jih2nn
Jihoon Song
20 days
RT @davidzmorris: Y'all I was just notified of something mind-boggling, in the current context, by the inimitable @sbetamc:. The beacon dep….
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@jih2nn
Jihoon Song
21 days
Here is an article on the complexity of FOCIL for the EL. It introduces three new or modified engine APIs and provides example implementations. It also covers the compatibility between FOCIL and BALs. The next writeup will address the complexity of FOCIL for the CL with feedback.
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@jih2nn
Jihoon Song
22 days
The other important interaction is timing. The IL is a list of transactions and has no other strict requirements. Since it doesn’t have to be built on the head, the execution payload release and IL building can happen independently. Having the payload released before IL building.
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