Urgent Sui - Mainnet - Upgrade to mainnet-v1.81.1

Scheduled for Oct 8, 00:00 - 23:59 UTC

Scheduled

We are upgrading our Sui Mainnet infrastructure to mainnet-v1.81.1 on 2026-10-08. This release introduces protocol version 138 with consensus and execution engine updates, including gas model refinements, memory invariant checks for Programmable Transaction Blocks, and object fund withdrawal validation. Brief interruptions to RPC availability may occur on that date.

RPC Changes:
derivedderivedObject and multiGetDerivedObjects — New fields added to IAddressable in GraphQL for fetching derived objects.
multiGetDynamicFields — New GraphQL query for fetching multiple dynamic fields across different parent objects.
Balance.coinMetadata — New nullable field added to Balance in GraphQL responses.
Transaction.effects.checkpoint — Now resolves correctly for transactions delivered over GraphQL subscriptions; it was previously always null.

https://github.com/MystenLabs/sui/releases/tag/mainnet-v1.81.1

Posted Oct 07, 2026 - 20:03 UTC

This scheduled maintenance affects: Sui (Sui - Mainnet).