[Standard] zkSync Era - Mainnet & Sepolia Testnet - Upgrade to core-v31.0.0

Scheduled for Jun 25, 00:00 - 04:00 UTC

Scheduled

We are upgrading our zkSync Era Mainnet infrastructure to core-v31.0.0.

This release includes improvements to proof submission handling, configuration enhancements for L2 DA commitment schemes, and several bug fixes affecting API stability and contract verification.

During the maintenance window, brief interruptions to RPC availability may occur.

RPC Changes:
eth_feeHistory — Reward percentiles parameter is now bounded to prevent invalid requests.

https://github.com/matter-labs/zksync-era/releases/tag/core-v31.0.0

Posted Jun 18, 2026 - 17:22 UTC

This scheduled maintenance affects: ZkSync Era (Mainnet — JSON-RPC API, Mainnet — Websockets API, Testnet — JSON-RPC API, Testnet — Websockets API).