Dear partners and node operators,

Now that v10 is live, you can start setting up your Fibre servers.

Fibre prerequisites

• A CPU that passes these tests along with 32GB RAM.

• You can check your disk and bandwidth requirements here.

• Remote signer connection between Fibre and the node is enabled via mutual TLS (mTLS).

• Object storage is optionally supported (eg. S3 buckets):

  • Switching shard storage docs are here.

  • Migration steps to another bucket are here.

• Same-host plaintext setups must use an IP literal (e.g. 127.0.0.1:26669); localhost is no longer accepted.

• The node’s application gRPC endpoint is enabled (default 127.0.0.1:9090).

• The validator node’s privval gRPC endpoint is enabled.

• The fibre listen port (default 7980) is reachable.

For best endorsement latency, colocate your object storage with the Fibre server, and keep Fibre close to your validator/RPC - ideally the same datacenter. Remote buckets in a different region can add seconds of latency and cause missed endorsements.

We recommend running Fibre on a separate server from your validator rather than on the validator host itself for security reasons.

Fibre setup instructions: https://docs.celestia.org/operate/consensus-validators/fibre/

Thank you,

Celestia Foundation