[Solana]- Mainnet upgrade to v4.3.0

Scheduled for Oct 20, 09:00 - 15:00 UTC

Scheduled

Blockdaemon will update Solana Mainnet nodes to v4.3.0 on 10/20/2026 at 9:00am UTC. We are updating our nodes due to a release from the Solana foundation. This update applies to all Blockdaemon Solana Mainnet nodes, there will be planned downtime of up to 60 minutes per node.

We have tested the release and do not anticipate any unexpected downtime other than mentioned above as a result of the update.

Please note that readiness for the Alpenglow activation also depends on compatibility with client providers and other related components.

If you have any questions or concerns, please reach out to your Account Manager.

For additional information, please review the following resources:

Release notes: https://github.com/anza-xyz/agave/releases/tag/v4.3.0

What is Solana's Alpenglow and What Does it Mean for Institutional SOL Staking? https://www.blockdaemon.com/blog/what-is-solanas-alpenglow-and-how-does-it-mean-for-institutional-sol-staking

Official Solana Alpenglow documentation: https://solana.com/upgrades/alpenglow

Posted Oct 16, 2026 - 13:03 UTC

This scheduled maintenance affects: Staking Reporting API (Solana Staking Reporting), Staking API (Solana Staking API), Blockdaemon RPC API (Solana Native API), Blockdaemon Validator (Solana Validator), and Protocols (Dedicated Nodes) (Solana).