Flow mainnet height co-ordinated upgrade

Scheduled Maintenance Report for Flow

Completed

The scheduled maintenance has been completed.

Posted Feb 18, 2025 - 16:30 UTC

In progress

Scheduled maintenance is currently in progress. We will provide updates as necessary.

Posted Feb 18, 2025 - 16:00 UTC

Update

There is a breaking change to streaming Access API in this upgrade.

Several AccessAPI and ExecutionDataAPI streaming endpoints include a message_index field in the response which indicates the order of messages sent by the server so the client can detect if they missed processing any. Previously, some endpoints used 1 as the first index in a stream while others used 0. After the HCU, all endpoints will be consistent regarding message_index and start from index 0.

For more details, please refer to the breaking changes section in the pre-release notes - https://github.com/onflow/flow-go/releases/tag/v0.38.1.

These streaming APIs are fairly recent, therefore most apps will not be impacted.

Posted Feb 14, 2025 - 20:50 UTC

Scheduled

Flow mainnet will undergo a height-coordinated upgrade.

The upgrade will NOT cause any network downtime except for transaction execution being paused for a few minutes while the execution nodes restart.

Posted Feb 14, 2025 - 20:18 UTC

This scheduled maintenance affected: Flow mainnet core components (Transaction Execution).