fixturenet-optimism

fixturenet-optimism

Instructions to setup and deploy an end-to-end L1+L2 stack with fixturenet-eth (L1) and Optimism (L2)

We support running just the L2 part of stack, given an external L1 endpoint. Follow the L2 only doc for the same.

Setup

Clone required repositories:

laconic-so --stack fixturenet-optimism setup-repositories

# If this throws an error as a result of being already checked out to a branch/tag in a repo, remove the repositories mentioned below and re-run the command
# The repositories are located in $HOME/cerc by default

Build the container images:

laconic-so --stack fixturenet-optimism build-containers

# If redeploying with changes in the stack containers
laconic-so --stack fixturenet-optimism build-containers --force-rebuild

# If errors are thrown during build, old images used by this stack would have to be deleted

Note: this will take >10 mins depending on the specs of your machine, and requires 16GB of memory or greater.

This should create the required docker images in the local image registry:

• cerc/go-ethereum
• cerc/lighthouse
• cerc/fixturenet-eth-geth
• cerc/fixturenet-eth-lighthouse
• cerc/foundry
• cerc/optimism-contracts
• cerc/optimism-l2geth
• cerc/optimism-op-node
• cerc/optimism-op-batcher
• cerc/optimism-op-proposer

Create a deployment

First, create a spec file for the deployment, which will map the stack's ports and volumes to the host:

laconic-so --stack fixturenet-optimism deploy init --map-ports-to-host any-fixed-random --output fixturenet-optimism-spec.yml

Ports

It is usually necessary to expose certain container ports on one or more the host's addresses to allow incoming connections. Any ports defined in the Docker compose file are exposed by default with random port assignments, bound to "any" interface (IP address 0.0.0.0), but the port mappings can be customized by editing the "spec" file generated by laconic-so deploy init.

In addition, a stack-wide port mapping "recipe" can be applied at the time the laconic-so deploy init command is run, by supplying the desired recipe with the --map-ports-to-host option. The following recipes are supported:

Recipe	Host Port Mapping
any-variable-random	Bind to 0.0.0.0 using a random port assigned at start time (default)
localhost-same	Bind to 127.0.0.1 using the same port number as exposed by the containers
any-same	Bind to 0.0.0.0 using the same port number as exposed by the containers
localhost-fixed-random	Bind to 127.0.0.1 using a random port number selected at the time the command is run (not checked for already in use)
any-fixed-random	Bind to 0.0.0.0 using a random port number selected at the time the command is run (not checked for already in use)

For example, you may wish to use any-fixed-random to generate the initial mappings and then edit the spec file to set the fixturenet-eth-geth-1 RPC to port 8545 and the op-geth RPC to port 9545 on the host.

Or, you may wish to use any-same for the initial mappings -- in which case you'll have to edit the spec to file to ensure the various geth instances aren't all trying to publish to host ports 8545/8546 at once.

Data volumes

Container data volumes are bind-mounted to specified paths in the host filesystem. The default setup (generated by laconic-so deploy init) places the volumes in the ./data subdirectory of the deployment directory. The default mappings can be customized by editing the "spec" file generated by laconic-so deploy init.

---

Once you've made any needed changes to the spec file, create a deployment from it:

laconic-so --stack fixturenet-optimism deploy create --spec-file fixturenet-optimism-spec.yml --deployment-dir fixturenet-optimism-deployment

Start the stack

Start the deployment:

laconic-so deployment --dir fixturenet-optimism-deployment start

1. The fixturenet-eth L1 chain will start up first and begin producing blocks.
2. The fixturenet-optimism-contracts service will configure and deploy the Optimism contracts to L1, exiting when complete. This may take several minutes; you can follow the progress by following the container's logs (see below).
3. The op-node and op-geth services will initialize themselves (if not already initialized) and start
4. The remaining services, op-batcher and op-proposer will start

Logs

To list and monitor the running containers:

laconic-so --stack fixturenet-optimism deploy ps

# With status
docker ps

# Check logs for a container
docker logs -f <CONTAINER_ID>

Example: bridge some ETH from L1 to L2

Send some ETH from the desired account to the L1StandardBridgeProxy contract on L1 to test bridging to L2.

We can use the testing account 0xe6CE22afe802CAf5fF7d3845cec8c736ecc8d61F which is pre-funded and unlocked, and the cerc/foundry:local container to make use of the cast cli.

1. Note the docker network the stack is running on:

docker network ls
# The network name will be something like laconic-[some_hash]_default

2. Set some variables:

L1_RPC=http://fixturenet-eth-geth-1:8545
L2_RPC=http://op-geth:8545
NETWORK=<the network name found above>
DEPLOYMENT_CONTEXT=<L1 chain-id; 1212 by default>
ACCOUNT=0xe6CE22afe802CAf5fF7d3845cec8c736ecc8d61F

If you need to check the L1 chain-id, you can use:

docker run --rm --network $NETWORK cerc/foundry:local "cast chain-id --rpc-url $L1_RPC"

3. Check the account starting balance on L2 (it should be 0):

docker run --rm --network $NETWORK cerc/foundry:local "cast balance $ACCOUNT --rpc-url $L2_RPC"
# 0

4. Read the bridge contract address from the L1 deployment records in the op-node container:

# get the container id for op-node
NODE_CONTAINER=$(docker ps --filter "name=op-node" -q)
BRIDGE=$(docker exec $NODE_CONTAINER cat /l1-deployment/$DEPLOYMENT_CONTEXT/L1StandardBridgeProxy.json | jq -r .address)

5. Use cast to send some ETH to the bridge contract:

docker run --rm --network $NETWORK cerc/foundry:local "cast send --from $ACCOUNT --value 1ether $BRIDGE --rpc-url $L1_RPC"

6. Allow a couple minutes for the bridge to complete

7. Check the L2 balance again (it should show the bridged funds):

docker run --rm --network $NETWORK cerc/foundry:local "cast balance $ACCOUNT --rpc-url $L2_RPC"
# 1000000000000000000

Clean up

To stop all services running in the background, while preserving chain data:

laconic-so deployment --dir fixturenet-optimism-deployment stop

To stop all services and also delete chain data:

laconic-so deployment --dir fixturenet-optimism-deployment stop --delete-volumes

Troubleshooting

• If op-geth service aborts or is restarted, the following error might occur in the op-node service:

  WARN [02-16|21:22:02.868] Derivation process temporary error       attempts=14 err="stage 0 failed resetting: temp: failed to find the L2 Heads to start from: failed to fetch L2 block by hash 0x0000000000000000000000000000000000000000000000000000000000000000: failed to determine block-hash of hash 0x0000000000000000000000000000000000000000000000000000000000000000, could not get payload: not found"

• This means that the data directory that op-geth is using is corrupted and needs to be reinitialized; the containers op-geth, op-node and op-batcher need to be started afresh:

  WARNING: This will reset the L2 chain; consequently, all the data on it will be lost

  • Stop and remove the concerned containers:

    # List the containers
    docker ps -f "name=op-geth|op-node|op-batcher"
    
    # Force stop and remove the listed containers
    docker rm -f $(docker ps -qf "name=op-geth|op-node|op-batcher")

  • Remove the concerned volume:

    # List the volume
    docker volume ls -q --filter name=l2_geth_data
    
    # Remove the listed volume
    docker volume rm $(docker volume ls -q --filter name=l2_geth_data)

  • Re-run the deployment command used in Deploy to restart the stopped containers

Known Issues

• Resource requirements (memory + time) for building the cerc/foundry image are on the higher side
  • cerc/optimism-contracts image is currently based on cerc/foundry (Optimism requires foundry installation)