Base Activates Azul Upgrade: Major Step Toward Faster Withdrawals and Decentralization

Overview of the Azul Upgrade

Base officially activated the Azul upgrade on its mainnet on May 28, 2026. This marks the network's first independent protocol upgrade, separate from broader Optimism stack releases. The changes focus on enhancing security through diversified proof systems, improving operational efficiency with new clients, and aligning with recent Ethereum developments.

The upgrade represents continued progress toward Stage 2 decentralization for Base. It reduces reliance on single points of trust and sets the foundation for meaningful improvements in user experience, particularly around withdrawal times from the layer-2 network to Ethereum.

Multiproof System Enhances Security and Speed

The core innovation in the Azul upgrade is the multiproof validation architecture. It combines trusted execution environment (TEE) proofs with zero-knowledge (ZK) proofs. Under this setup, either proof type can independently finalize state proposals.

When both TEE and ZK proofs agree on the same outcome, withdrawal finality between Base and Ethereum can potentially drop to as little as one day. Additionally, permissionless ZK proofs can override permissioned TEE proofs in cases of disagreement. This design strengthens censorship resistance and moves the network closer to full decentralization.

Base described the multiproof approach as making the network "faster and more secure." The system reduces dependence on any single verification method while maintaining robust safety guarantees. Further development of permissionless ZK proving remains part of the longer-term roadmap.

New Client Stack Delivers Performance Gains

Alongside the proof system changes, Base has consolidated its infrastructure around dedicated clients. The network now primarily uses base-reth-node as its execution client and base-consensus (built on OP Kona) as its consensus client.

These changes have produced clear operational improvements. Empty block production dropped approximately 99%, from around 200 per day to roughly two. The network also demonstrated the ability to handle transaction bursts reaching 5,000 transactions per second during testing and deployment.

Node operators must now migrate to the new clients. Older implementations such as op-node, op-geth, nethermind, and kona will no longer support the upgraded chain. Operators using the Base node package with OP Reth can update more easily, while others may require a full resync.

Ethereum Compatibility and Development Impact

Azul incorporates Ethereum's recent execution-layer changes, including the CLZ opcode and Osaka repricing specifications. According to Base, these updates require no major code rewrites for most application developers, ensuring smooth continuity for existing smart contracts and dApps.

The upgrade was first deployed on testnet in April 2026. An Immunefi audit competition with rewards up to $250,000 helped identify potential vulnerabilities before the mainnet activation.

Future Roadmap and Market Position

Base maintains a strong position among Ethereum layer-2 solutions. With substantial TVL and dominant stablecoin liquidity, particularly for USDC, the network serves as a major hub for decentralized finance activity.

Two additional upgrades are planned for the second half of 2026: a performance-focused release by the end of June and a user experience-focused update around late August. Native account abstraction also sits on the development roadmap, which could further simplify interactions for end users.