Ethereum Cancun Upgrade Core Meeting Analysis: How EIP-4844 Reshapes the Layer2 Ecosystem and Competitive Landscape

Ethereum Cancun Upgrade Core Developer Meeting Deep Dive: Layer2 Ecosystem Reshaping Imminent

Recently, the Ethereum core developer meeting once again focused on the highly anticipated "Cancun-Deneb" upgrade (Cancun upgrade for short). The meeting delved into the technical details of key proposals like EIP-4844 (Proto-Danksharding), testnet deployment progress, and the mainnet activation timeline. As the most substantial scaling upgrade on Ethereum's roadmap since "The Merge," the Cancun upgrade aims to drastically reduce the cost for Layer2 networks to submit data to the mainnet by introducing a new transaction type called "blobs." This will lay the foundation for a performance leap across the entire Ethereum ecosystem. This article provides an in-depth analysis of the key information revealed in the meeting and explores its long-term impact on the Ethereum mainnet and major Layer2 solutions.

I. Meeting Focus: Technical Challenges and Deployment Roadmap for EIP-4844

According to the developer meeting discussions, the core of the Cancun upgrade is undoubtedly EIP-4844. This proposal does not implement full sharding directly but introduces the carrier of "blobs." Unlike traditional calldata, blobs are designed as temporary storage that carries large amounts of data but is only accessible for a fixed period (approximately 18 days). Layer2 networks (like Rollups) can publish compressed batch transaction data to the Ethereum mainnet in the form of blobs without permanently storing this data on Ethereum's execution layer. This design cleverly separates data availability from permanent storage, ensuring security while significantly reducing data publishing costs.

The meeting focused on blob size, quantity, and the fee market mechanism. Currently, the developer community leans towards setting a target capacity of multiple blobs per block. This design aims to create a dedicated space market for blobs, independent of the existing Gas fee market. Its fee fluctuations will primarily be influenced by the supply and demand for blob space, thereby decoupling it from the mainnet's regular transaction fees. According to early testnet data shared by developers, this mechanism is expected to reduce transaction costs for mainstream Layer2s by an order of magnitude, opening the door for high-frequency, low-cost on-chain applications.

Regarding the deployment roadmap, the meeting clarified that rigorous validation will continue on multiple testnets. Developers emphasized that ensuring the stability and security of the network upgrade is the top priority before mainnet activation. While no definitive final date was given, the community generally expects that if testnet progress is smooth, the Cancun upgrade could be deployed to the Ethereum mainnet within the coming months.

II. Profound Impact on the Ethereum Mainnet: From Settlement Layer to "Security and Data Availability Layer"

The profound significance of the Cancun upgrade lies in further clarifying the strategic positioning of the Ethereum mainnet within the multi-layer ecosystem. With the implementation of EIP-4844, the Ethereum mainnet will focus more on providing global security and reliable data availability guarantees, while delegating high-throughput transaction execution tasks more to Layer2 networks.

First, the mainnet's economic model will undergo subtle changes. The introduction of blob fees provides Ethereum with a new source of fee revenue. This revenue may be burned through some mechanism, further strengthening ETH's deflationary attributes. Second, the mainnet's network congestion pressure is expected to be structurally alleviated. Moving large amounts of data from expensive calldata to dedicated blob space will free up mainnet block capacity, making core native applications like DeFi and NFTs run more smoothly. Finally, this solidifies Ethereum's position as the "security bedrock." The security of all Layer2s is ultimately anchored to the Ethereum mainnet. By reducing the anchoring cost, the Cancun upgrade makes this security model more attractive and sustainable.

III. The "Seismic Shift" in the Layer2 Ecosystem: Reshaping Performance, Fees, and the Competitive Landscape

The most direct and dramatic impact of the Cancun upgrade will be felt in the Layer2 ecosystem. Its influence is mainly reflected in three dimensions:

1. Significant Drop in Transaction Fees, a Qualitative Leap in User Experience: Currently, data publishing costs constitute a major part of the operating costs for both Optimistic Rollup and ZK-Rollup. According to estimates from some Layer2 projects, after the implementation of EIP-4844, their data publishing costs are expected to drop by over 90%. This means the transaction fees paid by users will depend more on the operational efficiency and profit models of the Layer2 networks themselves, rather than being constrained by the mainnet's high Gas fees. Transactions costing a few cents or even fractions of a cent will become possible, fundamentally changing the feasibility of cost-sensitive applications like gaming, social media, and high-frequency trading.

2. Intensified Competition Among Technical Paths, Differentiation Becomes Key: With the substantial reduction in basic data costs, competition among different Layer2 solutions will shift more to other dimensions. For ZK-Rollups (like zkSync, StarkNet, Scroll), their inherent advantages of fast finality (no challenge period wait) and greater privacy potential will become more prominent. They may gain an edge in financial applications requiring instant confirmation and complex computation. For Optimistic Rollups (like Arbitrum, Optimism), their first-mover ecosystem advantage, mature EVM compatibility, and ongoing progress towards decentralized sequencers will help them consolidate their position in general-purpose DeFi and large-scale ecosystems. Additionally, hybrid architectures like Validiums and Volitions will gain more development space due to the lower cost of data availability.

3. Rebalancing Ecosystem Development and Value Capture: The fee reduction will stimulate explosive growth of DApps within Layer2 ecosystems. However, this also poses a challenge to the token economic models of the Layer2s themselves. If fee revenue plummets, Layer2 projects will need to achieve sustainable operation and value capture through other means (such as sequencer auctions, MEV capture, value sharing within the ecosystem). Simultaneously, the Cancun upgrade may accelerate the trend towards "app-chains" or "application-specific Rollups," as the startup and operating costs for customized chains will become more affordable.

IV. Long-Term Outlook: Ethereum's Moat in the Multi-Chain Era

The Cancun upgrade is a crucial step in Ethereum's "rollup-centric scaling roadmap," but it is not the final destination. Subsequent "sharding" phases will further increase the number and capacity of blobs, continuously scaling Layer2. In the long term, this strategy aims to build a vast ecosystem with Ethereum as the secure base layer, composed of numerous efficient and low-cost Layer2 networks.

Facing competition from other high-performance public chains, the Cancun upgrade helps Ethereum consolidate its core advantage: by sharing the mainnet's security, Layer2s can obtain security guarantees far exceeding those of independent chains while still achieving scalability. This "shared security" model may prove more attractive in the long run than mere "cross-chain interoperability." Once the cost barrier is removed, Ethereum's vast developer community, deep financial infrastructure (DeFi), and powerful network effects will be more fully unleashed.

Of course, challenges remain. Issues like liquidity fragmentation between Layer2s, security risks of cross-chain bridges, and centralized sequencer problems are all hurdles that need to be addressed on the path to ecosystem prosperity. The Cancun upgrade provides the performance foundation, but the robustness of the entire ecosystem and the refinement of the user experience still require the continuous effort of the entire community.

Risk Disclosure

The above content is based solely on publicly available developer meeting information and technical principles for informational purposes. The cryptocurrency market is highly volatile, and technological innovation and implementation carry uncertainty. Any mentioned technological upgrade progress, market predictions, or ecosystem impacts in this article do not constitute any form of investment advice. Readers should conduct independent research and consult professional financial advisors before making any decisions. Markets involve risks; invest with caution.