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Tái Staking (Restaking) và Hệ sinh thái EigenLayer: Giải pháp Mới Nâng Tầm Bảo Mật Ethereum hay Canh Bạc Ngàn Tỷ Đô?

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DistilHub Editorial August 12, 2026 · 49 min read
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Công nghệ Blockchain
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The blockchain landscape in 2026 is a paradox of soaring ambition and stark reality. For years, the promise of “Web3” hinged on scalable, low-cost decentralized applications, a vision famously championed by Ethereum’s “rollup-centric roadmap”. This paradigm shift postulates a future where a lean, secure Layer 1 (L1) acts as a settlement and data availability layer, while the bulk of transaction execution occurs on specialized Layer 2 (L2) networks, primarily rollups. Yet, as we delve into mid-2026, the modular blockchain architecture, while delivering on some efficiency promises, is revealing its own complex tapestry of fragmentation, centralization risks, and security vulnerabilities that often get overshadowed by the prevailing narrative of progress.

Key Takeaways



  • Modular blockchains aim to solve scalability and flexibility by separating core functions, but this introduces significant complexity and new points of failure.

  • Rollups have drastically reduced transaction costs on Ethereum, with L2 networks handling significantly more daily transactions than the mainnet in 2026.

  • Despite transaction growth, the Ethereum Layer 2 ecosystem experienced a dramatic 90% decline in Total Value Locked (TVL) to approximately $5 billion by July 2026, down from $48 billion earlier in the year, highlighting capital flight and fragmentation challenges.

  • The reliance on centralized sequencers in most leading rollups remains a significant censorship and security risk, with fully decentralized sequencing still largely theoretical or in early development.

  • Cross-chain bridges, essential for the modular ecosystem, continue to be major attack vectors, accounting for over $328.6 million in losses across eight major incidents through mid-May 2026 alone.

Market Context: A Tumultuous Road to Scalability


The narrative surrounding blockchain scalability has evolved dramatically. Gone are the days when monolithic chains promised to handle all global transactions on a single layer. Ethereum, once plagued by prohibitive gas fees exceeding $50 for basic operations during peak times in 2021 and 2024, has strategically embraced modularity. The Dencun upgrade in March 2024, which introduced EIP-4844 for “blob” transactions, slashed L2 fees by 10-100x, allowing transactions on networks like Arbitrum, Base, and Optimism to cost fractions of a cent. As of May 2026, Ethereum mainnet gas typically sits well below 1 Gwei, with a simple ETH transfer costing around $0.10-$0.20 on L1 and even less on most L2s.

This cost reduction has driven a significant shift in activity. Layer 2 networks collectively processed close to 2 million daily transactions in 2026, roughly double the Ethereum mainnet volume, and now account for about 95% of Ethereum’s total transaction throughput. Daily active addresses on Ethereum mainnet reached a three-year high of about 1.03 million in Q1 2026, signaling renewed user activity, likely facilitated by the lower cost environment on L2s.

However, beneath these encouraging adoption metrics lies a more concerning trend: capital flight. Total Value Locked (TVL) in Ethereum Layer 2 networks plummeted to approximately $5 billion as of July 2026, a staggering drop from $48 billion earlier in 2026. Major players like Arbitrum, Base, and Optimism, which collectively held $35.5 billion in TVL in early 2026, now command a much smaller share. This significant contraction, a decline of over $43 billion, underscores a severe fragmentation issue across the more than 73 active L2 rollups and a potential loss of investor confidence. For context, Ethereum’s mainnet DeFi TVL was around $41 billion in late July 2026, indicating that the L2 ecosystem, once approaching parity, now represents a mere fraction of its parent chain’s economic activity.

Deconstructing the Modular Stack: On-Chain Data and Fundamental Realities


The modular blockchain thesis posits a layered architecture, typically comprising:



  • Execution Layer: Where transactions are processed (e.g., rollups).

  • Data Availability Layer (DAL): Ensures transaction data is published and accessible (e.g., Ethereum, Celestia, EigenDA).

  • Consensus Layer: Determines the canonical chain state (e.g., Ethereum’s Proof-of-Stake).

  • Settlement Layer: Where transactions are finalized and disputes resolved (e.g., Ethereum mainnet).

Rollups: The Engine of Scalability, Acknowledging Their Centralized Reality


Rollups are the cornerstone of this modular vision. They batch thousands of transactions off-chain, execute them, and then post a compressed summary or cryptographic proof back to the Ethereum mainnet. This significantly offloads computational burden from the L1, drastically reducing costs and increasing throughput.


  • Optimistic Rollups (ORs): (e.g., Arbitrum, Optimism, Base)

    ORs assume transactions are valid by default and provide a “challenge period” (typically seven days) during which anyone can submit a fraud proof if they detect an invalid state transition. Arbitrum and Optimism have both achieved permissionless fraud proofs in production by 2026, a crucial security milestone that took years to develop.


    Arbitrum, for instance, has demonstrated substantial adoption. By October 2025, the broader Arbitrum ecosystem processed approximately 2.36 billion cumulative transactions, representing roughly 34% of all Layer-2 transactions. Arbitrum One alone exceeded 2.1 billion lifetime transactions during 2025, with the second billion completed in less than twelve months. Its 24-hour transaction count stood at approximately 2 million as of August 2026, with peak daily transactions reported at nearly 5.95 million in 2026. Arbitrum One’s average TPS is around 57, with a theoretical maximum near 6,095 TPS. Despite these high volumes, Arbitrum One generated only around $12,691 in revenue per day as of August 2026, highlighting a disconnect between network activity and direct token value capture.


    Optimism’s Superchain, encompassing 34 OP Chains, drives over 50% of all L2 activity and more than 10% of overall crypto activity in H1 2025. OP Mainnet processes an average of 800,000 daily transactions, with a peak of 3,823,880 transactions on February 5, 2026. By August 2026, Optimism’s Mainnet transactions had surged to three times the levels seen in early 2024.



  • ZK Rollups (ZKRs): (e.g., zkSync Era, StarkNet, Scroll)

    ZKRs provide cryptographic proofs (zero-knowledge proofs) that guarantee the validity of off-chain transactions, offering instant finality and stronger security guarantees than ORs. While the technology is more complex and computationally intensive, it mitigates the challenge period inherent in ORs. zkSync Era, for example, is aiming for “Fair Sequencing” and plans for fully open participation in its decentralized sequencer network in 2026. Institutions prioritizing security and privacy, such as big banks and payment processors, are increasingly looking to zk-based systems for core applications.



The Centralization Chasm: Sequencers and Their Unseen Power


A critical, yet often downplayed, aspect of the current rollup architecture is the centralization of sequencers. The sequencer is responsible for ordering transactions, bundling them, and submitting them to the L1. Currently, most L2 networks, including Arbitrum One, OP Mainnet, and Base, operate with centralized sequencers managed by their core development teams.



The truth is, while rollups promise decentralization, their current reliance on centralized sequencers introduces a single point of failure and significant censorship risks. This isn’t just a theoretical vulnerability; it’s a fundamental challenge to the very ethos of decentralization that blockchain purports to uphold.



A centralized sequencer can censor transactions, reorder them for Maximal Extractable Value (MEV) extraction, or even cause network downtime. The zkEVM rollup Linea, for instance, halted its sequencer and censored attacker addresses following an exploit in June 2024, starkly underscoring these risks. While Arbitrum has a long-term vision for transitioning to a decentralized, fair sequencing model and Optimism is also exploring decentralization, these efforts are still in progress. Projects like Espresso Systems, Astria, and Flashbots’ SUAVE are developing “shared sequencer networks” to address this, aiming to separate sequencing from rollup execution and make it a shared public utility across multiple L2s. However, implementing truly decentralized sequencing without introducing new attack surfaces is a complex engineering challenge.

Data Availability Layers: The Unsung Heroes (and their own risks)


For rollups to inherit the security of Ethereum, it’s paramount that the data for all transactions is publicly available. This is the role of Data Availability Layers (DALs). Ethereum’s mainnet itself serves as a robust DAL, but specialized solutions are emerging to offer even greater throughput and lower costs.



  • EigenLayer and EigenDA: EigenLayer allows Ethereum stakers to “restake” their ETH to secure other decentralized services, known as Actively Validated Services (AVSs), in exchange for additional yield. EigenDA is EigenLayer’s flagship data availability service. By early 2026, approximately 4.6 million ETH had been restaked across roughly 1,900 operators on EigenLayer, which held over $15 billion in TVL as of February 2026. EigenDA aims for a throughput of 100 MB/s, with a roadmap to scale to 1 GBps, significantly higher than Ethereum’s 8.2 MB per block. However, EigenLayer introduces new risks, including slashing risk for restakers, smart contract risk, potential centralization if a few large operators dominate, and systemic risk if a major failure cascades across the Ethereum ecosystem. The Kelp DAO exploit in April 2026 demonstrated that cascading risk across liquid restaking protocols can affect the entire sector.

  • Celestia: Celestia is another prominent modular data availability network designed to scale alongside the number of users, allowing developers to deploy custom blockchains without needing to bootstrap their own consensus network. While Celestia’s token (TIA) has faced price volatility, its adoption as a modular data availability layer remains a key metric for its long-term viability.

Risk and Opportunity: A Double-Edged Sword


The modular blockchain thesis, while groundbreaking, presents a complex risk/reward profile that merits a skeptical examination.

Opportunities: The Bright Side of Scalability



  • Unprecedented Scalability and Lower Costs: Rollups have proven their ability to dramatically increase transaction throughput and reduce fees, making decentralized applications more accessible to a global audience. This opens doors for mainstream adoption in gaming, social media, and micro-payments.

  • Application-Specific Blockchains (App-Chains): The modular stack empowers developers to build highly customized, application-specific rollups (app-chains) tailored to their unique needs, offering greater flexibility and performance for specialized use cases.

  • Innovation and Flexibility: By decoupling layers, different teams can innovate independently on each component, fostering a more agile development environment and accelerating the pace of innovation across the Web3 stack.

  • New Economic Models: The modular ecosystem creates new revenue streams, such as sequencer fees, data availability fees, and restaking yields, fostering diverse economic incentives for participants.

The Other Side: Real Risks and What Nobody Is Saying


Despite the optimistic projections, the modular blockchain future is fraught with significant, often downplayed, risks:



  • Complexity Overload: For end-users, developers, and even auditors, the sheer complexity of interacting with multiple interconnected L2s, bridges, and data layers is a formidable barrier. Debugging cross-rollup interactions and ensuring seamless user experiences remain massive challenges. This complexity can inadvertently centralize power in the hands of a few highly technical teams.

  • Security Fragmentation and Bridge Vulnerabilities: Each new rollup and bridge introduces additional attack surfaces. Cross-chain bridges, in particular, have become notorious honeypots for hackers. In 2026 alone, eight major bridge exploits through mid-May resulted in approximately $328.6 million in losses. The Kelp DAO exploit in April 2026 saw $292 million drained through its LayerZero bridge, impacting over 20 chains by compromising the messaging layer. Another incident in July 2026 saw $24.15 million in USDC stolen from AFX Trade’s custodial bridge on Arbitrum due to compromised validator keys. These incidents highlight that the “interoperability” touted as a benefit is currently a significant security liability.

  • Liquidity Fragmentation and Poor User Experience: The proliferation of numerous rollups leads to fragmented liquidity, making it difficult for users to move assets and for protocols to achieve deep capital efficiency. Bridging assets between different L2s is often slow, expensive, and risky, hindering a seamless user experience. This fragmentation contradicts the vision of a unified, composable Web3 ecosystem.

  • Centralization Vectors Persist: While the underlying Ethereum L1 is highly decentralized, many L2s retain centralized components, especially their sequencers. This centralization risk undermines censorship resistance and introduces potential for MEV extraction by the sequencer operator. The path to fully decentralized sequencing is a long and arduous one, with many projects still in early research or implementation phases.

  • Economic Viability and the “Rollup Graveyard”: With over 73 active L2 rollups by April 2026, many are struggling to attract and retain users and generate sustainable revenue. The significant TVL decline in July 2026 suggests that many smaller L2s, especially those whose growth was driven by temporary incentive programs, are becoming “ghost towns” as capital consolidates around a few dominant players. The Block’s 2026 Layer-2 Outlook flags most mid-tier rollups as unlikely to survive the next 12 months. This raises serious questions about the long-term economic sustainability of a highly fragmented L2 ecosystem.

  • Regulatory Uncertainty: The rapidly evolving, multi-layered blockchain architecture presents a moving target for regulators. The legal and compliance implications of assets moving across numerous interconnected chains, especially concerning know-your-customer (KYC) and anti-money laundering (AML) regulations, remain largely unclear and could pose significant hurdles for institutional adoption.

Case Study: Arbitrum’s Growth and the Fragility of L2 TVL


Arbitrum stands as a prime example of both the promise and the perils of the rollup-centric future. It has cemented its position as a leading optimistic rollup, boasting impressive transaction volumes and a deep DeFi ecosystem. By March 2026, Arbitrum had processed over 2.1 billion cumulative transactions and secured approximately $20 billion in TVL, supporting over 1,000 projects. Its average transaction fee is remarkably low, around $0.004. This success validates the technical efficacy of optimistic rollups in scaling Ethereum.

However, Arbitrum has not been immune to the broader market dynamics. Despite its leading position, Arbitrum’s TVL, alongside other major L2s, contributed to the dramatic decline in the overall L2 TVL from $48 billion to $5 billion by July 2026. While Arbitrum’s underlying infrastructure was not compromised in the AFX Trade bridge exploit, the incident on an Arbitrum-based protocol highlights the interconnected risks within the modular ecosystem. Attackers obtained private keys from five validators of AFX Trade’s custodial bridge, allowing them to withdraw $24.15 million in USDC. This demonstrates that even on robust L2s, external integrations and custodial mechanisms introduce critical vulnerabilities.

Comparative Landscape: Monolithic vs. Modular, and the L2 Battleground


The modular approach stands in stark contrast to monolithic blockchains like Solana, which attempt to handle all functions on a single, highly performant layer. While Solana has achieved high throughput, it often sacrifices decentralization and faces occasional network outages. Ethereum’s modular roadmap prioritizes security and decentralization, delegating execution to L2s while maintaining a robust L1.

Within the L2 ecosystem, the competition is fierce. Arbitrum and Base, built on the OP Stack, emerged as dominant forces in early 2026. Base, leveraging Coinbase’s distribution advantage, grew faster than any L2 in the 18 months leading to April 2026, with TVL increasing from $2.1 billion in October 2024 to $11.2 billion. Base reportedly processed approximately 11.57 million daily transactions and had 663,000 daily active addresses in early 2026, compared to Arbitrum’s approximately 4.3 million transactions and 129,000 active addresses during the same period. However, Arbitrum maintains an advantage in DeFi liquidity and institutional deposits. Optimism, with its “Superchain” vision, aims to create an ecosystem of interconnected OP Stack chains, driving over 50% of all L2 activity.

Meanwhile, zk-rollups like zkSync Era and StarkNet are gaining traction due to their superior security model and instant finality, particularly appealing to institutions. The market is clearly consolidating around a few leading L2s, with Base, Arbitrum, and Optimism processing nearly 90% of all Layer 2 transactions in March 2026.

Recommendations: Navigating the Modular Maze


The modular blockchain future is not a predetermined utopia; it’s a dynamic, evolving landscape demanding careful navigation. For both users and developers, a pragmatic, skeptical approach is paramount.

Short-Term Vision (Next 6-12 Months)



  • Consolidate and Prioritize Security: Users should favor battle-tested L2s with strong security track records and active development towards decentralization. The dramatic TVL decline on L2s in mid-2026 is a stark reminder of capital risk. Exercise extreme caution with nascent, unproven rollups or those with limited liquidity.

  • Mitigate Bridge Risk: Acknowledge that cross-chain bridges remain a primary attack vector. Minimize asset transfers across bridges and, when necessary, choose bridges with robust security audits, transparent operations, and significant insurance funds. The ongoing exploits highlight that “better audits” and “better monitoring” are not enough; the fundamental model often remains vulnerable.

  • Focus on Core Utility, Not Just Hype: For developers, prioritize building on L2s that offer genuine technical advantages and a sustainable economic model, rather than chasing ephemeral incentive programs. The “rollup graveyard” looms large for projects that fail to build organic user bases.

Long-Term Outlook (1-3 Years)



  • Decentralized Sequencing is Key: The long-term health of the modular ecosystem hinges on the successful implementation of decentralized sequencers. Investors and users should watch for tangible progress in this area from leading L2s and shared sequencer projects. Until then, the centralization risk remains a significant asterisk on the “decentralized” narrative.

  • Interoperability Evolution: The fragmented liquidity and user experience must be addressed through more robust and secure cross-rollup communication protocols. Solutions that move beyond traditional “lock-and-mint” bridge models towards more trust-minimized data availability verification, perhaps leveraging technologies like EigenDA, could be transformative.

  • User Experience Simplification: Mass adoption requires abstracting away the underlying complexity of multiple chains and bridges. Account abstraction, simplified onboarding, and seamless cross-chain applications will be crucial for attracting the next wave of users. The current user journey is still too fragmented and intimidating for the average person.

  • Economic Sustainability Over Token Emissions: The long-term viability of L2s will depend on their ability to generate sustainable protocol revenue from fees, rather than relying solely on inflationary token emissions to incentivize usage. A critical analysis of a project’s tokenomics and its path to profitability is essential.

The modular blockchain future, while promising to unlock unprecedented scalability for Web3, is far from a smooth, linear progression. It is a complex, often perilous, journey marked by technical challenges, centralization trade-offs, and persistent security vulnerabilities. As analysts, our role is not to amplify the hype, but to critically dissect the realities, highlight the risks, and provide an evidence-based perspective on a landscape that is still very much under construction.

Disclaimer: This is not investment advice. All investment decisions should be made with independent research and professional guidance.

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Nguồn tham khảo / Sources

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