The Merge marked a historic shift for Ethereum as it transitioned from proof-of-work (PoW) to proof-of-stake (PoS), but it was only the beginning of a broader, ambitious evolution. As the largest Layer-1 blockchain, Ethereum’s upgrades have far-reaching implications across the entire cryptocurrency ecosystem. With a clear and publicly shared roadmap, the network is advancing toward a future defined by scalability, security, and decentralization. This article dives deep into Ethereum’s post-Merge trajectory, exploring key upgrades like Proto-Danksharding, Verkle Trees, and proposer-builder separation, while highlighting how these developments are shaping the next era of decentralized applications.
The Vision Behind Ethereum’s Roadmap
Ethereum’s development path is structured around six core phases conceptualized by co-founder Vitalik Buterin: The Merge, The Surge, The Scourge, The Verge, The Purge, and The Splurge. While not officially adopted as formal stages by the Ethereum Foundation, this framework has become widely accepted in the community due to its clarity and forward-thinking design.
Each phase targets a specific challenge:
- The Merge completed the shift to PoS.
- The Surge focuses on scalability through rollups and data availability.
- The Scourge aims to neutralize MEV-driven centralization.
- The Verge enables statelessness via Verkle Trees.
- The Purge reduces historical data bloat.
- The Splurge encompasses miscellaneous improvements like account abstraction.
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These upgrades are being developed in parallel rather than sequentially, accelerating progress toward Ethereum’s ultimate goal: supporting up to 100,000 transactions per second (TPS) while maintaining decentralization and security.
Core Keywords
- Ethereum roadmap
- The Merge
- Proto-Danksharding (EIP-4844)
- Layer-2 scaling
- Verkle Trees
- Proposer-builder separation (PBS)
- Data availability sampling
- Account abstraction
The Merge: Foundation for Future Upgrades
The Merge in September 2022 was a pivotal moment in blockchain history. It replaced energy-intensive mining with staking, aligning Ethereum with environmental, social, and governance (ESG) principles. By eliminating miner rewards, the network reduced ETH issuance by approximately 88.7%, contributing to a more deflationary monetary policy—especially when combined with EIP-1559’s fee-burning mechanism.
Key outcomes of The Merge include:
- 99.95% reduction in energy consumption
- Shorter block times (from 13.3 to 12 seconds)
- Stronger finality through slashing mechanisms
- Introduction of staking yields and MEV extraction opportunities for validators
While The Merge itself is complete, subsequent upgrades like Capella and Shanghai enabled critical features such as withdrawals of staked ETH, further enhancing user control and liquidity.
The Surge: Scaling Through Rollups and Proto-Danksharding
Scalability remains one of blockchain’s greatest challenges. While traditional systems like Visa handle thousands of TPS, Ethereum historically averaged just 15–30. To bridge this gap, Ethereum has adopted a rollup-centric roadmap, where Layer-2 solutions handle execution while Ethereum serves as a secure settlement and data availability layer.
Layer-2 adoption has surged, with annual growth exceeding 257.7% in 2023. Daily transaction volumes on L2s have even surpassed those on Ethereum’s mainnet. However, current rollups still face high costs due to reliance on calldata—a legacy mechanism not optimized for large-scale data publishing.
This is where Proto-Danksharding (EIP-4844) comes in—a foundational step toward full Danksharding. EIP-4844 introduces blobs, temporary data containers that offer cheaper storage for rollups compared to calldata. Blobs are expected to reduce data availability (DA) costs by 10x or more, making L2 transactions significantly more affordable.
How Blob Transactions Work
Blobs operate under a two-dimensional fee market based on a multi-dimensional version of EIP-1559:
- One dimension governs gas for computation.
- The other manages blob fees based on supply and demand.
This separation ensures that spikes in computational load don’t inflate DA costs—and vice versa—improving overall network efficiency.
Initially, all validators must download full blob data, meaning true sharding isn’t achieved yet. However, EIP-4844 lays the groundwork for future upgrades like data availability sampling (DAS) and KZG commitments, enabling lightweight clients to verify data without storing it entirely.
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Data Availability and Security Innovations
Data Availability Sampling (DAS)
As rollup activity grows, so does the burden on nodes to store increasing amounts of data. Without intervention, only well-resourced entities could run validators—threatening decentralization.
DAS solves this by allowing nodes to randomly sample small portions of blob data. Using erasure coding (e.g., Reed-Solomon), DAS mathematically guarantees that if over 50% of samples are available, the full data set can be reconstructed. This means light clients can verify availability efficiently.
KZG Commitments
Ensuring correct erasure coding is crucial—otherwise, corrupted blobs could render data unrecoverable. KZG commitments provide cryptographic proof that data has been properly encoded. They use polynomial commitments to bind original data to its expanded form, ensuring integrity without requiring fraud proofs.
While KZG requires a trusted setup (a concern for some), it operates under a 1-of-N trust model—meaning only one honest participant is needed to maintain security. Future upgrades may transition to quantum-resistant alternatives like zk-STARKs.
The Scourge: Neutralizing MEV Centralization
Maximal Extractable Value (MEV)—profit earned by reordering or censoring transactions—has become a growing source of centralization risk. Specialized "searchers" dominate MEV extraction using high-frequency algorithms, potentially undermining fairness.
Proposer-Builder Separation (PBS) addresses this by splitting block production into two roles:
- Block builders create optimized blocks and bid for inclusion.
- Block proposers select the highest bid without seeing block contents.
This auction model ensures most MEV revenue flows back to decentralized stakers rather than centralized actors. PBS also reduces hardware requirements for proposers, supporting greater participation.
Currently implemented via third-party tools like MEV-Boost, PBS will eventually be integrated natively into the protocol. Additional safeguards like anti-censorship lists (crLists) are being explored to prevent transaction exclusion.
The Verge: Towards Stateless Clients with Verkle Trees
Running a full node requires storing Ethereum’s entire state—a growing burden as account balances, contracts, and storage expand. This threatens decentralization by raising hardware barriers.
Verkle Trees offer a solution. Unlike Merkle-Patricia Trees used today, Verkle Trees generate much smaller cryptographic proofs (witnesses) that allow nodes to validate blocks without holding full state data.
When combined with weak statelessness, this enables validators to verify transactions using only relevant state fragments provided in each block. This dramatically lowers storage and bandwidth needs—paving the way for mobile and embedded devices to participate in consensus.
The Purge: Reducing Protocol Bloat
Even with stateless clients, long-term data accumulation poses risks. Two key upgrades aim to mitigate this:
Historical Expiry (EIP-4444)
Nodes will stop serving historical blocks older than one year over peer-to-peer networks. This reduces disk space requirements and simplifies client software.
Historical data will still be accessible through external services like block explorers or decentralized archives—shifting responsibility without compromising transparency.
State Expiry
Dormant accounts inactive for extended periods (e.g., one year) will be pruned from active state and moved to cold storage. This reduces computational overhead during execution and prevents “zombie” accounts from bloating the network indefinitely.
The Splurge: Enhancing Usability and Flexibility
Account Abstraction (ERC-4337)
Account abstraction replaces externally owned accounts (EOAs) with smart contract wallets, enabling:
- Social recovery and multi-sig security
- Batched transactions
- Gas payment in ERC-20 tokens
- Subscription models and automated payments
It’s implemented off-chain via a mempool-like system, avoiding hard forks while delivering significant UX improvements.
Token Bound Accounts (ERC-6551)
This extension allows NFTs to own assets and interact with protocols directly—turning digital collectibles into autonomous agents within games, social platforms, and decentralized organizations.
Frequently Asked Questions
Q: What is Proto-Danksharding (EIP-4844)?
A: EIP-4844 introduces blob-carrying transactions that reduce data availability costs for Layer-2 rollups. It’s a stepping stone toward full Danksharding and could lower L2 fees by 10x or more.
Q: How does proposer-builder separation improve decentralization?
A: PBS prevents powerful builders from monopolizing MEV profits by creating an open market where proposers earn bids. It also reduces hardware demands on validators.
Q: Will Ethereum become fully stateless?
A: Not immediately—but the network is moving toward "weak statelessness," where validators verify blocks without storing full state, thanks to Verkle Trees and witness-based validation.
Q: What happens to historical blockchain data under EIP-4444?
A: Nodes won’t serve old blocks over P2P networks after one year, but data remains accessible via explorers, indexers, or archival services.
Q: How does account abstraction improve wallet security?
A: It enables advanced recovery options (like multi-factor or social recovery), eliminates seed phrase risks, and supports programmable transaction logic.
Q: Is Ethereum moving toward centralization with specialized block builders?
A: While builder roles may centralize somewhat, PBS preserves decentralized verification. Long-term plans include distributed block building to maintain balance.
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