Sei Network Initiates Eidos Upgrade to Achieve 200,000 TPS

Sei Network Initiates Eidos Upgrade to Achieve 200,000 TPS

Sei Network has started the phased rollout of its Eidos storage upgrade as part of its ambitious Giga roadmap, aiming to enhance the network’s capability to process up to 200,000 transactions per second (TPS). The upgrade, associated with the v6.6 mainnet, is focused on improving how the layer-1 network stores and validates on-chain data.

Phased Rollout and Technical Enhancements

The Eidos upgrade introduces significant modifications to Sei’s storage architecture. According to an update from August 12, 2026, the first phase is now live, and the implementation will happen in stages to ensure that Sei remains operational during the migration process. Existing storage systems will coexist with new systems while data transfers occur, minimizing disruptions for users.

One of the core changes involves separating the Ethereum Virtual Machine (EVM) state into a dedicated database. This separation aims to mitigate storage constraints that could hinder the execution layer from reaching the high speeds outlined in the Giga plan. Future upgrades will include the introduction of FlatKV, a flat key-value storage system, and LtHash for verification, which are designed to streamline operations further.

Performance Improvements

As part of the Eidos upgrade, traditional Merkle tree structures used for maintaining EVM state will be replaced. Sei noted that the current system requires multiple recalculations of hashes for each change, leading to inefficiencies as data volume grows. The new FlatKV system simplifies this process by requiring only a single write for any state change, supporting faster data handling.

Additionally, Sei has implemented a new storage engine called LittDB for handling transaction receipts and block data. This new system is expected to enhance performance significantly, achieving write throughput exceeding one gigabyte per second and maintaining high read capabilities.

Future Directions and Infrastructure Collaboration

Sei’s Giga roadmap integrates three main components: consensus, execution, and storage, with Eidos being pivotal in the storage layer rebuild. By streamlining historical data management, Sei aims to ensure that active nodes remain efficient, avoiding the costly hardware upgrades that might arise from increased storage needs.

Looking ahead, Sei has also taken steps to bolster user access to its ecosystem, including enhanced wallet capabilities. After integrating native Sei support within MetaMask in August 2025 and establishing agreements to pre-install Sei wallets on Xiaomi smartphones, Sei is positioning itself for broader adoption.

As the Eidos upgrade progresses, node operators will be equipped with detailed migration guides, and no action will be required from users during the upgrade process. Sei assures that all balances, smart contracts, and historical records will remain accessible throughout the transition.