CELESTIA-APP v9.0.1-mocha — Mocha upgrade

Dear partners and node operators,

We are pleased to announce a new version of celestia-app today. Please upgrade as soon as possible to benefit from the latest features and fixes.

Celestia-app:

This release is intended for Mocha. If you are upgrading from v8, please read through the release notes carefully.

This is a major upgrade introducing a reduction in block times to 3s.

Other highlights:

• min-retain-blocks is now honoured even when it is lower than the evidence window. If you change min-retain-blocks from 0 to another value, the node will start pruning the backlog on startup; if it has been running for a long time this can take a while, so either leave it running until it catches up or re-sync a fresh node (e.g. via state sync) if history is not important to you.

• Archival nodes must keep min-retain-blocks = 0 (the default): any non-zero value enables pruning and the node will no longer be a full archival node.

• Recommended setting for validators is min-retain-blocks to 600000 (note the pruning warning above then).

If you are an active validator, please signal to upgrade to v9:

• celestia-appd tx signal signal 9 --from (validatorwallet) --chain-id mocha-4 --fees 210000utia

• You can track the tally of signaling by validators using the following query: celestia-appd query signal tally 9

• Once 5/6+ of the voting power have signaled, the upgrade will be ready.

• To view the upcoming upgrade height use the following query: celestia-appd query signal upgrade

• The upgrade delay is 2 days after 5/6+ voting power has signaled and the upgrade tx is submitted.

Release notes: https://github.com/celestiaorg/celestia-app/releases/tag/v9.0.1-mocha

Thank you,

Celestia Foundation