Running an agent
There are two ways to run a Beamer agent: via a container image and directly from source. Regardless of the way it is run, an agent requires the following:
An account that is sufficiently funded on both L2 chains.
Names and RPC endpoints of the L1 chain, source and target chains.
A directory containing Beamer contracts’ deployment information. See The contracts’ deployment information.
For a detailed explanation of configuration options, see Agent configuration.
The contracts’ deployment information
During the Beamer contracts’ deployment process, a directory with deployment information is created. The directory typically looks like this:
deployments/ └── goerli ├── deployment.json ├── FillManager.json ├── MintableToken.json ├── OptimismL1Messenger.json ├── OptimismL2Messenger.json ├── RequestManager.json └── Resolver.json
The above shows contract deployment on Goerli.
deployment.json file contains information on the chains that the
contracts have been deployed on, the contracts’ addresses, as well as the block
number at the time of deployment.
The rest of the files contain contract ABI information which is needed by the agent.
Running an agent container
To run an agent container simply do:
docker run ghcr.io/beamer-bridge/beamer agent --account-path <path> \ --account-password <password> \ --chain l1=<l1-rpc-url> \ --chain source=<source-l2-rpc-url> \ --chain target=<target-l2-rpc-url> \ --deployment-dir <contract-deployment-dir> \ --source-chain source \ --target-chain target
Running directly from source
First clone the Beamer repository:
git clone https://github.com/beamer-bridge/beamer.git
Make sure you have Python 3.10.x and Poetry installed.
Enter the virtual environment:
cd beamer poetry shell
While still inside the virtual environment, run:
beamer agent --account-path <path> \ --account-password <password> \ --chain l1=<l1-rpc-url> \ --chain source=<source-l2-rpc-url> \ --chain target=<target-l2-rpc-url> \ --deployment-dir <contract-deployment-dir> \ --source-chain source \ --target-chain target
Updating an agent
To describe how to update an agent, it is worth to have a look on Beamer’s versioning scheme. As described in Making a new release, each major version describes a different mainnet deployment thus a different set of contracts. Please note, that if you update your agent to a new major version, it will run on different contracts. Updating to a new major version requires different steps for you to safely transition to a new major contract version. A minor (e.g. 1.X.0 -> 1.Y.0) or a patch (e.g. 1.2.X -> 1.2.Y) version upgrade typically brings with it a set of fixes and it is recommended to switch to a newer version sooner rather than later. The difference between the minor and patch version updates is that the former may bring a change in command line options, configuration file settings or similar things where some user attention may be required, while the patch version update should be completely painless.
Update to a new agent release
Running your agent in a container, it is as easy as updating your image in the docker-compose.yml to the latest version. The repo https://github.com/beamer-bridge/run-your-own-agent is actively maintained and will provide you with the most up-to-date agent version. Alternatively you will find the latest version under https://github.com/beamer-bridge/beamer/releases.
Update to a new major version
When updating to a new major version (i.e. X.0.0 -> Y.0.0) and thus to a new contract deployment, it is recommended to setup a fresh agent instance following the guidelines from https://github.com/beamer-bridge/run-your-own-agent. Please keep the old agent running and leave it temporarily untouched. As soon as the contracts are paused, the old agent should run for at least another 24 hours to ensure withdrawal of outstanding funds. The old agent can then be shutdown safely.