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Jihoon Song
@jih2nnJihoon Song is an independent software developer contributing to Ethereum core protocol. He has contributed to enshrined PBS, co-authored Fork-choice Enforced Inclusion Lists (FOCIL), and is now contributing to Attester-Proposer Separation (APS). Prior to joining the blockchain industry, he built a deep learning–powered mobile scanner app at an AI startup, downloaded over 10 million times.
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Ethereum: Quick Slots EIP-8198 Spec Merged
Ethereum EIP-8198 Quick Slots merged into consensus specs by @jih2nn, advancing slot time reduction with ETH at $2670.36 on 4h chart. (Source) 09-25-2026 07:04 |
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Ethereum: Glamsterdam Bug Bounty Opens for Reports
Ethereum Foundation expands bug bounty for Glamsterdam upgrade with reward multipliers as Sepolia testing nears. (Source) 09-21-2026 05:02 |
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Ethereum: Consensus Specs PRs Merged for FOCIL
Ethereum consensus-specs#5512 and #5544 merged, advancing FOCIL devnet-0 alpha.14 with IL store key updates at $1924.74 ETH price. (Source) 08-19-2026 10:46 |
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Ethereum: EL Spec Update #3370 Merges on Amsterdam
Ethereum EL spec #3370 merges on Amsterdam; ETH trades at $1923.3 with bullish MACD and EMA50 support at $1897.49. (Source) 08-19-2026 10:46 |
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Ethereum: BlockHash Debate in getInclusionList Spec
Ethereum developers question blockHash necessity in getInclusionList as engine API PR nears merge, with ETH trading at $1922.89 amid neutral RSI. (Source) 07-23-2026 06:09 |
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Ethereum: PayloadStatusV2 Added to Engine API
Ethereum engine API gains PayloadStatusV2 with inclusionListSatisfied flag for IL compliance on VALID payloads only. (Source) 07-01-2026 09:44 |
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Ethereum: FCR Delivers 96% 12-Second Confirmations
Ethereum Fast Confirmation Rule simulation confirms 96% 1-slot finality across 800000 mainnet slots with zero false positives, while ETH trades at $2027.32. (Source) 05-29-2026 06:39 |
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Ethereum: Ramps Up Hegotá Fork Development
Ethereum devs accelerate Hegotá fork after Glamsterdam progress, eyeing EIPs like FOCIL, Native AA, and statelessness amid ETH price at $2293.46 testing lower support. (Source) 05-07-2026 15:30 |
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Ethereum: FOCIL Devnet Planning Progresses
Ethereum advances FOCIL devnet with Fabio's Interop proposal and glamsterdam-devnet-0 specs agreement, impacting ETH price prediction amid bullish trends. (Source) 04-23-2026 08:27 |
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Ethereum: Staking Ratio Surpasses 1/3
Ethereum staking ratio hits 1/3 mark, risking solo stakers' exit as issuance curve drives full staking; ETH at $2315.03 faces bearish MACD signals. (Source) 04-21-2026 11:37 |
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Ethereum's FOCIL Evolution Unveiled at EthCC 2026
Jihoon Song's EthCC talk dives into FOCIL's origins, Frame transaction synergies, and blob support future, amid ETH's bullish 4h chart momentum. (Source) 04-08-2026 12:53 |
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Blob Streaming: Enhancing Data Availability Layer for Ethereum Scaling
According to Jihoon Song, blob streaming presents a novel approach to scaling the data availability (DA) layer, a critical component for optimizing Ethereum's performance and transaction throughput. This method aims to handle high-volume data efficiently, enabling more effective Layer 2 and scalability solutions. The focus is on addressing current limitations in data processing within blockchain ecosystems. (Source) 03-26-2026 14:37 |
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EthStaker Day at EthCC Highlights Staking Innovations
According to Jihoon Song, EthStaker Day at EthCC will showcase pivotal discussions and advancements in Ethereum staking. Taking place at the Staking Stage within the EthCC venue, the event features prominent speakers like Justin Drake, Terence Tsao, and others discussing critical topics such as staking technologies, L1/L2 scaling, ePBS, and client safety methods. Attendees can RSVP to gain insights into the future of staking and related protocols. (Source) 03-25-2026 12:48 |
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Ethereum Specification Updates: FOCIL and Deadline Changes
According to @jih2nn, updates are being made to FOCIL specifications by rebasing them on Hegotá. The Execution Layer (EL) spec and Engine APIs spec have shifted to Amsterdam, while adjustments to the Consensus Layer (CL) spec on Heze are underway. A critical change includes replacing the 8-second deadline with a 12-second attester view freeze to address equivocation visibility issues. These updates aim to improve synchronization among attesters, ensuring a unified view of network activities. Further revisions are expected post-EthCC alongside an EIP update. (Source) 03-25-2026 08:01 |
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Protocol Update: FCR Adoption Surges Among CL Clients
According to @jih2nn, major protocol updates do not always necessitate a hard fork, as confirmed blocks can address most use cases. Over half of CL clients have already adopted a prototype or earlier version of Fast Confirmation Rate (FCR), signaling a potential 60x improvement in processing speed. (Source) 03-17-2026 14:42 |
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Ethereum Snap v2 Introduces BALs for Efficient State Sync
According to @jih2nn, Ethereum's latest Snap v2 update introduces Block-Level Access Lists (BALs) to replace trie healing in state synchronization. This innovation simplifies the protocol by allowing nodes to download state diffs directly from BALs, reducing round trips and improving readiness for higher gas limits and state growth. The update is poised to enhance Ethereum's scalability and efficiency. (Source) 03-11-2026 19:41 |
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Besu, Teku, and Lodestar Progress FOCIL Implementation for Ethereum
According to Jihoon Song, Besu has begun integrating FOCIL on the Amsterdam framework, with an early draft pull request by RoboCopsGoneMad currently in the specification implementation stage. Teku has merged Heze fork boilerplate code, including FOCIL elements such as the InclusionList container, with Mehdi Aouadi planning progressive implementation. Meanwhile, Lodestar is finalizing ePBS devnet-0 and intends to rebase FOCIL once the network stabilizes. (Source) 03-11-2026 16:13 |
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EPBS Devnet-0 Launch Nears Completion with Final Client Integration
According to Jihoon Song, the EPBS Devnet-0 launch is imminent, with only one client integration remaining. This development marks significant progress in the blockchain ecosystem, potentially impacting adoption and testing of decentralized applications. (Source) 02-24-2026 14:35 |
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Ethereum (ETH) Core Devs Meeting Recording and Summary by Jihoon Song: What Traders Should Watch on Upgrade Timelines and EIPs
According to @jih2nn, the official recording and a detailed written summary of the latest Ethereum protocol meeting are now available on YouTube (video ID Go7H43hjx-k) and in the ethereum/pm GitHub issue #1848 comment thread, respectively (source: @jih2nn on X; source: YouTube; source: ethereum/pm GitHub). These resources are the canonical channels used by Ethereum core contributors to document All Core Devs discussions that determine upgrade scope and timing, which are direct inputs for trading ETH around network changes and client release schedules (source: ethereum/pm GitHub repository documentation). The post itself does not list specific EIPs, decisions, or dates; traders should review the linked summary to verify any finalized items that could impact gas costs, throughput, validator economics, or client compatibility before positioning (source: @jih2nn post linking the summary; source: ethereum/pm GitHub issue #1848 comment thread). For market context, prior major milestones such as The Merge on September 15, 2022 and the Dencun mainnet activation on March 13, 2024 drew heightened market focus around ETH due to protocol-level changes, as recorded by official Ethereum Foundation communications and core client release notes (source: Ethereum Foundation announcements; source: client releases referenced in ethereum/pm GitHub). (Source) 01-14-2026 07:58 |
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Ethereum FOCIL CL Spec Updated After Consensus Layer Refactors PR 4818: What ETH Traders Need to Know
According to @jih2nn, the FOCIL Consensus Layer specification has been updated to reflect recent refactors in Ethereum’s CL spec, with the change referenced in the ethereum/consensus-specs repository PR 4818. source: twitter.com/jih2nn/status/2011347140250144968; github.com/ethereum/consensus-specs/pull/4818 This indicates a maintenance alignment between FOCIL and the upstream CL spec in the ethereum/consensus-specs codebase, and the post does not disclose any parameter changes, fork scheduling, or client release timelines. source: twitter.com/jih2nn/status/2011347140250144968; github.com/ethereum/consensus-specs/pull/4818 For ETH market participants, the cited materials describe a technical spec synchronization rather than a user-facing upgrade, so no immediate trading catalyst is identified in the sources. source: twitter.com/jih2nn/status/2011347140250144968; github.com/ethereum/consensus-specs/pull/4818 (Source) 01-14-2026 07:58 |