Gaia v29.0.0 Software Upgrade (Update: v29.0.1 Recommended)

Update (October 23, 2026): Gaia v29.0.1 is now recommended for the scheduled upgrade. This non-state-breaking patch release is built with Go 1.26.10, which includes a security fix for CVE-2026-111943 . The on-chain upgrade name remains `v29.0.0`, and the upgrade height remains `33,618,500`. Voting Information The Gaia v29.0.0 software upgrade proposal for the Cosmos Hub mainnet is now open for on-chain voting. • Proposal: Proposal #1059 • Voting period: 7 days • Voting deadline: October 27, 2026, at 12:00 UTC Validators and ATOM delegators are encouraged to review the proposal and cast their votes before the deadline. Upgrade Schedule If approved, the Cosmos Hub mainnet will execute the on-chain `v29.0.0` upgrade at the following block height: • Upgrade height: 33,618,500 • Estimated upgrade time: October 28, 2026, at 13:50 UTC The estimated time may vary depending on block production. Node operators should download and verify the Gaia v29.0.1 binary in advance and prepare to use it at the scheduled upgrade height. Cosmovisor: Place the v29.0.1 binary at `$DAEMON_HOME/cosmovisor/upgrades/v29.0.0/bin/gaiad`. Keep the directory name `v29.0.0` to…

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Thanks for the clear schedule. From a wallet support perspective, two quick questions that would help us answer users:

1. Do regular ATOM holders and delegators need to do anything for this upgrade, or is it only for node operators?
2. Should users expect a short pause in transactions around the upgrade height, and is there anything wallets or apps should check given the removal of the legacy parameter APIs?

Thanks for the questions!

1. ATOM holders and delegators: No token migration or other on-chain action is required for the upgrade itself. Delegators can vote directly on Proposal #1059. If they don’t vote, their voting power follows their validator’s vote, if cast. A delegator’s direct vote takes precedence over their validator’s vote for their delegated stake.

2. Network downtime and wallet compatibility: If approved, block production will temporarily halt at the upgrade height. Transactions cannot be confirmed until sufficient validators complete the upgrade and consensus resumes. The downtime depends on how quickly validators complete the upgrade and restore consensus.

Validators and RPC/API providers running Gaia nodes must install the required upgrade release. Wallet and app developers should confirm their RPC providers are prepared and check for dependencies on the legacy parameter APIs being removed.