Setting Up Your Environment for Ethermint on Celestia

Now the ethermintd binary is built, we need to setup a local network that communicates between ethermintd and Rollmint.

Run A Celestia Light Node

All sovereign rollups need to submit their transaction data to Celestia.

Here, we must first setup a Celestia Light Node with testnet tokens.

You can do this by following this tutorial here.

Instantiating the Ethermint Rollup

With a Celestia Light Node running in one terminal session, we can proceed to generate the Ethermint rollup.

In the ethermint directory, we have a helpful bash script that allows you to instantiate a local Ethermint sovereign rollup on Celestia.

caution

If you are on macOS, you will need to install md5sha1sum before starting your rollup:

brew install md5sha1sum

Run the following:

cd ethermint
bash init.sh

This bash script does everything needed to initialize your Ethermint rollup.

First, we need to setup some environment variables.

Networks

The commands below are for Arabica. If you're using Mocha, you'll need to replace the RPC endpoint with one for Mocha.

NAMESPACE_ID=$(echo $RANDOM | md5sum | head -c 16; echo;)
DA_BLOCK_HEIGHT=$(curl https://rpc.limani.celestia-devops.dev/block | jq -r '.result.block.header.height')

If you are running this on Arabica devnet, you need to run your light node with an account that has Arabica devnet tokens. Visit the faucet here.

With this setup complete, we can now start our Ethermint Rollup:

ethermintd start --rollmint.aggregator true --rollmint.da_layer celestia --rollmint.da_config='{"base_url":"http://localhost:26659","timeout":60000000000,"gas_limit":6000000,"fee":6000}' --rollmint.namespace_id $NAMESPACE_ID --rollmint.da_start_height $DA_BLOCK_HEIGHT 

You should start seeing logs about the chain starting. They will look similar to below:

1:27AM INF Unlocking keyring
1:27AM INF starting ABCI with Tendermint
1:27AM INF service start impl=EventBus module=events msg={}
1:27AM INF service start impl=PubSub module=pubsub msg={}
badger 2022/11/23 01:27:54 INFO: All 0 tables opened in 0s
badger 2022/11/23 01:27:54 INFO: Discard stats nextEmptySlot: 0
badger 2022/11/23 01:27:54 INFO: Set nextTxnTs to 0
1:27AM INF service start impl=IndexerService module=txindex msg={}
1:27AM INF WARNING: using default DA block time DABlockTime=30000 module=BlockManager
1:27AM INF initializing blockchain state from genesis.json
1:27AM INF created new capability module=ibc name=ports/transfer
1:27AM INF port binded module=x/ibc/port port=transfer
1:27AM INF claimed capability capability=1 module=transfer name=ports/transfer
1:27AM INF asserting crisis invariants inv=1/11 module=x/crisis name=gov/module-account
1:27AM INF asserting crisis invariants inv=2/11 module=x/crisis name=staking/module-accounts
1:27AM INF asserting crisis invariants inv=3/11 module=x/crisis name=staking/nonnegative-power
1:27AM INF asserting crisis invariants inv=4/11 module=x/crisis name=staking/positive-delegation
1:27AM INF asserting crisis invariants inv=5/11 module=x/crisis name=staking/delegator-shares
1:27AM INF asserting crisis invariants inv=6/11 module=x/crisis name=bank/nonnegative-outstanding
1:27AM INF asserting crisis invariants inv=7/11 module=x/crisis name=bank/total-supply
1:27AM INF asserting crisis invariants inv=8/11 module=x/crisis name=distribution/nonnegative-outstanding
1:27AM INF asserting crisis invariants inv=9/11 module=x/crisis name=distribution/can-withdraw
1:27AM INF asserting crisis invariants inv=10/11 module=x/crisis name=distribution/reference-count
1:27AM INF asserting crisis invariants inv=11/11 module=x/crisis name=distribution/module-account
1:27AM INF asserted all invariants duration=3.783918 height=0 module=x/crisis
1:27AM INF service start impl=RPC msg={}
1:27AM INF service start impl=Node msg={}
1:27AM INF serving HTTP listen address={"IP":"127.0.0.1","Port":26657,"Zone":""}
1:27AM INF starting P2P client
1:27AM INF listening on address=/ip4/143.244.145.92/tcp/26656/p2p/12D3KooWCrCqYheUBURCzzUqgxWFVFvFYPJ6nonTPN9uVQ4cXK5H module=p2p
1:27AM INF listening on address=/ip4/127.0.0.1/tcp/26656/p2p/12D3KooWCrCqYheUBURCzzUqgxWFVFvFYPJ6nonTPN9uVQ4cXK5H module=p2p
1:27AM INF no seed nodes - only listening for connections module=p2p
1:27AM INF starting Celestia Data Availability Layer Client baseURL=http://localhost:26659 module=da_client
1:27AM INF working in aggregator mode block time=30000
1:27AM INF Creating and publishing block height=1 module=BlockManager
1:27AM INF minted coins from module account amount=2059726034250856481aphoton from=mint module=x/bank
1:27AM INF submitting block to DA layer height=1 module=BlockManager
1:28AM INF Starting JSON-RPC server address=0.0.0.0:8545
1:28AM INF Starting JSON WebSocket server address=0.0.0.0:8546
1:28AM INF successfully submitted rollmint block to DA layer daHeight=25422 module=BlockManager rollmintHeight=1
1:28AM INF commit synced commit=436F6D6D697449447B5B323130203138352031373920362035322031333820373020313032203135322038302032323920313232203132342036332031382032313920313039203337203832203631203334203139302031323520393020323133203835203232382032323420323232203134203739203131305D3A317D
1:28AM INF indexed block height=1 module=txindex
1:28AM INF Creating and publishing block height=2 module=BlockManager
1:28AM INF minted coins from module account amount=2059726403014551280aphoton from=mint module=x/bank
1:28AM INF submitting block to DA layer height=2 module=BlockManager
1:28AM INF successfully submitted rollmint block to DA layer daHeight=25423 module=BlockManager rollmintHeight=2
1:28AM INF commit synced commit=436F6D6D697449447B5B3630203231332038372032313820383920313920323034203230322031363320383120323235203235352036352032323820313530203232392032333320323139203233322032343420313334203337203134342031303320313634203138382031393720323339203230342032303120323138203130325D3A327D
1:28AM INF indexed block height=2 module=txindex
1:28AM INF Creating and publishing block height=3 module=BlockManager
1:28AM INF minted coins from module account amount=2059726771778267119aphoton from=mint module=x/bank
1:28AM INF submitting block to DA layer height=3 module=BlockManager
1:29AM INF successfully submitted rollmint block to DA layer daHeight=25424 module=BlockManager rollmintHeight=3
1:29AM INF commit synced commit=436F6D6D697449447B5B313520323038203831203131203235332032322037322031393020333220323130203634203235332032303920313839203934203137203431203135203230302039362031383920323820313736203132332037352032392031393320313831203134312032303520323231203232325D3A337D
1:29AM INF indexed block height=3 module=txindex
1:29AM INF Creating and publishing block height=4 module=BlockManager
1:29AM INF minted coins from module account amount=2059727140542003996aphoton from=mint module=x/bank
1:29AM INF submitting block to DA layer height=4 module=BlockManager
1:29AM INF successfully submitted rollmint block to DA layer daHeight=25425 module=BlockManager rollmintHeight=4
1:29AM INF commit synced commit=436F6D6D697449447B5B313433203332203639203732203134342034352037302034302032392032303120393720313137203235312031393320313738203137362031353920323038203231372036312032362031353720353320393820323234203230352031373020313920313034203138372031323220385D3A347D
1:29AM INF indexed block height=4 module=txindex
1:29AM INF Creating and publishing block height=5 module=BlockManager

With that, we have kickstarted our ethermintd network!