OffchainLabs/nitro v3.9.9

Arbitrum Nitro v3.9.9

on GitHub

This release is available as a Docker Image on Docker Hub at offchainlabs/nitro-node:v3.9.9-6b0af88
This Docker image specifies default flags in its entrypoint which should be replicated if you're overriding the entrypoint: /usr/local/bin/nitro --validation.wasm.allowed-wasm-module-roots /home/user/nitro-legacy/machines,/home/user/target/machines\

Special note: Nitro 3.9.9 is an important release containing stability improvements and security fixes, and we recommend teams adopt it as soon as possible.

Important for any chains still on ArbOS40:

• If you're running a validator without a split validation server (this will be true of most validators), you should instead use the image offchainlabs/nitro-node:v3.9.9-6b0af88-validator which has the extra script /usr/local/bin/split-val-entry.sh as the default entrypoint (no need to override the default entrypoint). This will run both v3.9.9 and v3.7.6 validator workers for you.
• If you are using a split validator, you do not want to use -validator image, you need to run a validator worker on v3.7.6 as well as a worker for v3.9.9
• Arbitrum Chain SDK v0.25.2 (along with consensus_v51.1) is required for ArbOS51

Important for any chains that previously upgraded to ArbOS51 with consensus_v51:

• Validator should use configuration option --node.block-validator.pending-upgrade-module-root="" to avoid performing unnecessary work trying to validate consensus_v51.1.