How to spin up a local devnet

1. Compile CometBFT, i.e. the sequencing layer:

git clone https://github.com/cometbft/cometbft
cd cometbft
git checkout v0.38.10
make install

2. Compile Grug, i.e. the execution layer:

git clone https://github.com/left-curve/grug
cd grug
just install

3. Compile necessary contracts:

just optimize

4. Initialize CometBFT. This will create a directory ~/.cometbft, which most notably includes the genesis file at ~/.cometbft/config/genesis.json. However, the app genesis state (the app_state field in the JSON) is left empty for now:

cometbft init

5. Generate two keys. We will create register two accounts during genesis, which will use these two keys, respectively:

grug keys add test1
grug keys add test2

4. Prepare the genesis file. This runs an example script, which utilizes grug_sdk::GenesisBuilder to create an app genesis state and populate in the CometBFT genesis file:

cargo run -p grug-sdk --example build_genesis

5. Start the node. Generally, when starting, start grug first, then cometbft; when shutting down, stop cometbft first, then grug:

grug start
cometbft start

6. Optional: deleting existing chain data and restart anew:

cometbft unsafe-reset-all
grug db reset

7. How to shut down the node

Use CTRL+C to kill CometBFT first, then CTRL+C to kill Grug.

Generally, when starting, start Grug first then start CometBFT; then stopping, kill CometBFT then kill Grug.

Don't worry, you won't mess up anything if you get the order wrong. This is just the intended order the software are designed.