Shutter Dappnode Package

This package runs a Shutter Keyper, as well as its corresponding Shutter Chain node, along with a metrics service to monitor the node's performance and a PostgreSQL database to store the Keyper's state.

Services

This package includes the following services:

• Shutter Keyper (shutter):

  • Shutter provides an MEV protection system for rollups. It prevents frontrunning and improves censorship resistance using a threshold encryption mechanism.

  • There is a supervisor daemon that first ensures all the initialization and configuration processes are completed and then it starts the chain process. Once the chain process is healthy, the keyper is started, too. To do all this, the supervisor runs the scripts contained in /usr/local/bin, following this order: configure.sh → run_chain.sh → run_keyper.sh.

  • Configuration files for Shutter are generated and managed in /keyper/config and /chain/config.

• PostgreSQL Database (db):

  • The database stores the state of the Shutter Keyper and is initialized using the entrypoint.sh script.

  • Data is persisted in the db_data volume, which maps to /var/lib/postgresql/data.

• Metrics Service (metrics):

  • Uses VictoriaMetrics to send performance metrics to a remote Pushgateway.

  • Configuration is handled through templates in /config/gnosis/, and the main config file (vmagent.yml) is dynamically generated based on environment variables.

Configuration

The setup wizard provides options for users to configure the package, but all fields except KEYPER_NAME are optional because they can be included via a config file that is restored through a backup. This allows users to manage their configuration flexibly, either through the wizard or by restoring pre-configured settings.

Script Integration

The dvt_lsd_tools.sh script is sourced from the staker-package-scripts repository. This script is downloaded during the Docker build process using the release version specified in the STAKER_SCRIPTS_VERSION argument. Once downloaded, it is placed in /etc/profile.d/, where it can be used to manage staking-related processes within the package. In order to use it in the scripts, the profile is sourced (. /etc/profile).

Upstream Repository

Currently, there is no upstream repository for this package. The existing release tags for the Shutter components do not correspond directly to Docker image tags, which is why an official upstream repo has not been configured yet. Once the release tags align with the Docker image tags, this can be integrated to automate updates and version tracking for the package.