Ethereum Cancun Upgrade Three Months Later: Layer2 Ecosystem Restructuring Analysis

Ethereum Three Months After Cancun Upgrade: How Layer2 is Reshaping the Industry Landscape

In March 2024, Ethereum completed the highly anticipated "Cancun" (Dencun) upgrade, officially bringing the EIP-4844 protocol to mainnet. This technology innovation, dubbed "Proto-Danksharding," is now profoundly reshaping the competitive landscape of the Layer2 ecosystem three months later. From significant fee reductions to structural changes in TVL (Total Value Locked), and the divergence of Rollup technology paths, the impact of the Cancun upgrade continues to unfold across multiple dimensions.

1. Cancun Upgrade Core: The Technical Logic of Proto-Danksharding

The core of the Cancun upgrade is the introduction of EIP-4844, a protocol that introduces a new data type called "blob" to Ethereum. Unlike traditional transaction data, blob data is only temporarily stored at the consensus layer and does not permanently exist on the execution layer. This design allows Layer2 projects to significantly reduce data publication costs.

According to the Ethereum Foundation, the blob mechanism can reduce Layer2's data availability costs by approximately 10x. Before the upgrade, the cost per transaction for mainstream Rollups like Optimism and Arbitrum was approximately $0.1 to $0.5; after the upgrade, this figure has generally dropped below $0.01, with some scenarios as low as $0.001. This order-of-magnitude cost reduction has cleared a significant barrier for the adoption of Layer2 applications.

2. Fee Reduction: The Leap from "Usable" to "Mass Adoption"

Following the Cancun upgrade, Ethereum Layer2's fee structure has undergone fundamental changes. Taking Arbitrum as an example, its average transaction fees have dropped by more than 90% compared to before the upgrade. This change has directly driven a shift in user behavior: micro-transaction demand that was previously suppressed by fee barriers has been released, making scenarios like arbitrage frequency on decentralized exchanges and small payments in games economically viable.

From industry data, Layer2's daily transaction volume has shown significant growth after the Cancun upgrade. According to Dune Analytics, the total daily transactions of mainstream Layer2 networks increased from approximately 2 million before the upgrade to over 6 million after the upgrade—nearly tripling. This growth trend has remained stable over three months, indicating that the demand release brought by fee reduction is sustainable rather than a short-term effect.

3. TVL Changes: Layer2 Attraction Continues to Strengthen

Total Value Locked (TVL) is a key metric for measuring Layer2 ecosystem maturity. After the Cancun upgrade, Ethereum Layer2's TVL has shown steady growth. According to L2Beat data, as of June 2024, the combined TVL of mainstream Layer2 networks is approximately $40 billion, representing an increase of about 25% compared to before the upgrade.

Notably, the TVL structure is undergoing changes. While Arbitrum and Optimism continue to maintain their leading positions, emerging Layer2 networks like Base, zkSync, and StarkNet are rapidly gaining share. Base, as a Layer2 supported by Coinbase, has seen its TVL grow by over 100% in three months, becoming one of the fastest-growing players. This shift in landscape reflects the market's increasingly differentiated recognition of different technology paths.

4. Rollup Technology Evolution: Competition and Convergence Between Optimistic and ZK

The impact of the Cancun upgrade on different Rollup technology paths varies significantly. Optimistic Rollups (such as Arbitrum and Optimism) benefit most directly from the blob mechanism, as their data availability cost reduction is the greatest. While ZK Rollups (such as zkSync, StarkNet, and Polygon zkEVM) also benefit from cost reductions, their technology path focuses more on achieving more efficient verification through zero-knowledge proofs.

Worth noting is that the Cancun upgrade has accelerated the convergence trend between the two technology paths. Multiple ZK Rollup projects have begun adopting EIP-4844's blob mechanism to reduce data publication costs, while simultaneously advancing zkEVM (zero-knowledge proof Ethereum virtual machine) compatibility development. Arbitrum has included ZK verification exploration in its roadmap. This technological convergence indicates that the industry is seeking the optimal solution balancing security, cost efficiency, and user experience.

In terms of market share, Optimistic Rollups currently still dominate, accounting for over 60% of Layer2 TVL. However, ZK Rollups are growing faster, with multiple institutions predicting their market share could significantly increase in the next 12-18 months.

5. New Application Scenarios Emerge: DeFi, NFT, and链游

The significant fee reduction has provided fertile ground for the emergence of new application scenarios. In the DeFi sector, Layer2 decentralized exchange trading volume continues to rise. Uniswap's trading volume on Arbitrum and Optimism has grown significantly, with liquidity providers finding Layer2 strategy returns more attractive than mainnet. Lending protocols like Aave and Compound have also seen steady growth in total borrowing volume on Layer2.

The NFT market has also benefited significantly. Blur and OpenSea's deployment on Layer2 has drastically reduced NFT minting and trading costs, lowering the barrier to entry for creators and collectors. Some low-market-cap NFT trading frequencies have reached new highs on Layer2.

Gaming and social applications represent another rapidly growing sector. Due to gaming's extreme sensitivity to fees for frequent micro-transactions, Layer2's low-cost characteristics make it the preferred choice for链游 deployment. Several well-known gaming projects have announced migration or new deployment on Arbitrum and Base.

6. Challenges and Outlook

Despite the significant positive impact of the Cancun upgrade, the Layer2 ecosystem still faces challenges. The first is centralization risk—currently, most Layer2 Sequencers still operate in a centralized mode, creating tension with Ethereum's decentralization philosophy. The second is the security of exit mechanisms—while fraud proof and validity proof mechanisms are continuously improving, the security of large-scale assets remains a key concern for users.

Looking ahead, the Cancun upgrade is only the first step in Ethereum's scaling roadmap. According to plans, full Danksharding will be gradually implemented to further enhance data availability capacity. For Layer2, the trend of cost reduction will continue, which will further expand its advantages relative to mainnet.

From the industry landscape perspective, Layer2 competition is shifting from "technical narrative" to "ecosystem maturity" competition. Liquidity, user experience, and developer toolchains will become the key factors determining success. Base's rise has already proven that projects with strong traditional finance background support may achieve overtaking.

Three months after the Cancun upgrade, the Layer2 ecosystem stands at a critical inflection point in its transformation from a "niche geek tool" to a "mass application platform." This industry transformation driven by technological innovation has only just begun.

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Risk Warning: The above content is for reference only and does not constitute any investment advice. The cryptocurrency market has high volatility, and investment requires caution. Layer2 technology is still evolving rapidly, and related projects face multiple uncertainties such as technological iteration and regulatory policy changes. Investors should make decisions based on a thorough understanding of risks.