Cronos Validator Deployment

1. Deploy Cronos Testnet Full node.#

There are different binaries required to get the full node synced from genesis.

cronosd-v0.6.0-testnet

cronosd-v0.7.0-rc1-testnet

cronosd-v0.7.0-rc2-testnet

cronosd-v0.7.0-rc3-testnet

cronosd-v0.7.0-testnet

To make it easier to track, I suggest creating a directory structure to track all of the necessary binaries.

For example:

tree ~/binaries/

binaries/
├── cronosd-v0.6.0-testnet
├── cronosd-v0.7.0-rc1-testnet
├── cronosd-v0.7.0-rc2-testnet
├── cronosd-v0.7.0-rc3-testnet
├── cronosd-v0.7.0-testnet
└── tarballs
    ├── 0.6.0-testnet
    │   └── cronos_0.6.0-testnet_Linux_x86_64.tar.gz
    ├── 0.7.0-rc1-testnet
    │   ├── app.toml
    │   └── cronos_0.7.0-rc1-testnet_Linux_x86_64.tar.gz
    ├── 0.7.0-rc2-testnet
    │   └── cronos_0.7.0-rc2-testnet_Linux_x86_64.tar.gz
    └── 0.7.0-rc3-testnet
        └── cronos_0.7.0-rc3-testnet_Linux_x86_64.tar.gz

Once we’ve downloaded all of the necessary binaries, we can initialize our node. (assuming your deployment is identical)

./binaries/cronosd-v0.6.0-testnet init $NODE_NAME --chain-id cronostestnet_338-3

Then, with the ~/.cronos directory we generated from the initialization function, we will then copy each of the binaries into the working directory (~/.cronos/bin) For example:

tree ~/.cronos/

/home/devtrace/.cronos/
├── bin
│   ├── cronosd-v0.6.0-testnet
│   ├── cronosd-v0.7.0-rc1-testnet
│   ├── cronosd-v0.7.0-rc2-testnet
│   ├── cronosd-v0.7.0-rc3-testnet
│   └── cronosd-v0.7.0-testnet
├── config
│   ├── app.toml
│   ├── client.toml
│   ├── config.toml
│   ├── genesis.json
│   ├── node_key.json
│   └── priv_validator_key.json
└── data
    └── priv_validator_state.json

Once we have all of the binary versions copied into ~/.cronos/bin/, we’ll go ahead download and replace the necessary genesis.json.

curl https://raw.githubusercontent.com/crypto-org-chain/cronos-testnets/main/cronostestnet_338-3/genesis.json > ~/.cronos/config/genesis.json

With our genesis file downloaded, we can verify it’s correctness via checksum

if awk '{print $1}') = "7d898ad75b3e2e1fa182d928ca10a284c1dd252e12d17ad6dab76551b29d1a59" ; then echo "OK"; else echo "MISMATCHED"; fi;

If the checksums match, then the command output will be OK. If it does not match, then the command output will be MISMATCHED

And then we’ll need to make some adjustments to your app.toml file

sed -i.bak -E 's#^(minimum-gas-pricesspace:+=space:+).*$#\1"5000000000000basetcro"#' ~/.cronos/config/app.toml

As well as our config.toml

sed -i.bak -E 's#^(persistent_peersspace:+=space:+).*$#\1"8fcba3485c67a2a00a383b6f45660a4ac529c6ca@52.77.30.18:26656,e65199bc579ffd89d7c021c5611f9f1c97f7ff13@54.251.209.254:26656"#' ~/.cronos/config/config.toml

sed -i.bak -E 's#^(create_empty_blocks_intervalspace:+=space:+).*$#\1"5s"#' ~/.cronos/config/config.toml

sed -i.bak -E 's#^(timeout_commitspace:+=space:+).*$#\1"5s"#' ~/.cronos/config/config.toml

Lastly, we will create the cronosd service.

sudo nano /etc/systemd/system/cronosd.service

[Unit]
Description=cronosd
After=network.target auditd.service
Wants=network.target

[Service]
Type=simple
User=$YOUR_USERNAME
WorkingDirectory=/home/$YOUR_USERNAME/.cronos
ExecStart=/home/$YOUR_USERNAME/.cronos/bin/cronosd-v0.6.0-testnet start --home /home/$YOUR_USERNAME/.cronos
#ExecStart=/home/$YOUR_USERNAME/.cronos/bin/cronosd-v0.7.0-rc1-testnet start --home /home/$YOUR_USERNAME/.cronos
#ExecStart=/home/de$YOUR_USERNAMEvtrace/.cronos/bin/cronosd-v0.7.0-rc2-testnet start --home /home/$YOUR_USERNAME/.cronos
#ExecStart=/home/$YOUR_USERNAME/.cronos/bin/cronosd-v0.7.0-rc3-testnet start --home /home/$YOUR_USERNAME/.cronos
#ExecStart=/home/$YOUR_USERNAME/.cronos/bin/cronosd-v0.7.0-testnet start --home /home/$YOUR_USERNAME/.cronos
Restart=on-failure
RestartSec=10
LimitNOFILE=50000

[Install]
WantedBy=multi-user.target

With all of the above completed, the final step before the easy stuff is to make some changes to ~/.cronos/config/config.toml.