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2026 to Mark Ethereum ZK Rollup Inflection Point: Proof of Stake Sees 'Merge-like' Overhaul

2025.12.26 21:13:32

December 26: Ethereum researchers and developers are eyeing 2026 as a pivotal year for the blockchain to unlock exponential scalability via zero-knowledge (ZK) proofs. By then, some validators will stop re-executing transactions and instead directly validate ZK proofs— a fundamental shift in how the network operates, on par with the 2022 merge from proof-of-work (PoW) to proof-of-stake (PoS). Ethereum researcher Justin Drake noted that initial validators will validate ZK proofs for each block rather than re-running all transactions, delivering instant scalability to Layer 1 and laying the groundwork for a future 10,000 transactions per second (TPS). For context, Ethereum’s mainnet currently handles roughly 30 TPS. During Devconnet, Drake demonstrated that ZK proof validation can run on an old laptop. By the end of 2026, around 10% of validators are expected to switch to ZK validation mode (Lean Execution Phase 1). This shift will slash hardware requirements for validator nodes while preserving network decentralization. Gary Schulte, an engineer with Ethereum’s Besu client, pointed out that future computationally heavy work will fall primarily to block builders and ZK provers. Regular validators, meanwhile, will only need to perform lightweight verification— clearing the path for higher gas limits and overall throughput. On the roadmap: Ethereum is currently in Phase 0 (voluntary validation). It’s set to enter Phase 1 (partial validator switch) in 2026, then move to Phase 2 in 2027, where block producers will be required to generate ZK proofs to achieve full ZK rollup execution.
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