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Distributed Validators School Testnet

Quick Links

Genesis: link

Block explorer: TBA

Seeds: TBA

Chain Id: TBA

Hardware Requirements

Here are the minimal hardware configs required for running a validator/sentry node

  • 4GB RAM
  • 2vCPUs
  • 80GB Disk space

Software Requirements

Install Gaiad, Generate Wallet and Submit GenTx

Cosmos Hub binaries installation (gaiad)

For the sake of simplicity we decided to use Cosmos Hub service binary. In order to install it please follow steps from official Cosmos HUB instructions. It is based on the v7.0.2 version of gaiad binary. Please check version of used binary by running this command gaiad version --long. You should get big list of text and at the beginning of it you should have following lines:

name: gaia
server_name: gaiad
version: v7.0.2
commit: cd27aaaf39cc7819b5164e4baf3fd5aad23ec52a
build_tags: netgo ledger

Network init

cd ~ gaiad init "<moniker-name>" --chain-id <current course chain id>

example:

gaiad init course-participant-1 --chain-id dvs-course-testnet-1

Create Validator Key

It's very important that after you run this command that you save the seed phrase that is generated. If you do not save you phrase, you will not be able to recover this account.

gaiad keys add <your validator key name>

or restore existing wallet with mnemonic seed phrase. You will be prompted to enter mnemonic seed.

gaiad keys add <key-name> --recover

or add keys using ledger

gaiad keys add <key-name> --ledger

Check your key:

gaiad keys show <key-name> -a

Create account to genesis

This command will help you to create account in your local genesis file. It will add funds to your address. Otherwise gaiad getntx command will fail because of lack of funds.

gaiad add-genesis-account <key-name> 1000000000uatom

Create GenTX

Create the gentx file. Note, your gentx will be rejected if you use any amount greater than 1000000000uatom.

gaiad gentx <key-name> 1000000000uatom --output-document=gentx.json \
  --chain-id=dvs-course-testnet-1 \
  --moniker="<moniker-name>" \
  --website=<your-node-website> \
  --details=<your-node-details> \
  --commission-rate="0.10" \
  --commission-max-rate="0.20" \
  --commission-max-change-rate="0.01" \
  --min-self-delegation="1"

After gentx will be ready you can find it in the ~/.gaiad/config/gentx directory. After that you will be required to upload it into gentxs directory of this repository. Please name it using following template gentx-<validator name>.json.

In order to upload this file you will need to create fork of this repository. Please click on “Fork” button in the top right corner of this page, and name it somehow or leave repository name unchanged.

fork.png

After that you can upload gentx file into appropriate directory of your repository. Next, you will need to create a PR (Pull request) to add changes from your cloned repository into main repository.

Please go into root directory of your repository and click on “Contribute” button.

contribute.png

You will see this popup window.

popup.png

Please “Open pull request”, check data, put some description into text box field and click on “Create pull request” inside it. Congratulations you have created your first pull request!

Create validator after genesis

gaiad tx staking create-validator \
  --amount=1000000000uatom \
  --pubkey=$(gaiad tendermint show-validator) \
  --chain-id=dvs-course-testnet-1 \
  --moniker="<moniker-name>" \
  --website=<your-node-website> \
  --commission-rate="0.10" \
  --commission-max-rate="0.20" \
  --commission-max-change-rate="0.01" \
  --min-self-delegation="1" \
  --gas="auto" \
  --gas-prices="0.0025uatom" \
  --from=<key_name>

Run node

Set Up Cosmovisor

Set up cosmovisor to ensure any future upgrades happen flawlessly. To install Cosmovisor:

go install github.com/cosmos/cosmos-sdk/cosmovisor/cmd/[email protected]

Create the required directories:

mkdir -p ~/.gaiad/cosmovisor/genesis/bin
mkdir -p ~/.gaiad/cosmovisor/upgrades

After directories will be ready please copy gaiad binaries created in the “Cosmos Hub binaries installation (gaiad)” section into ~/.gaiad/cosmovisor/genesis/bin directory. You can do it using cp ~/go/bin/gaiad ~/.gaiad/cosmovisor/genesis/bin/gaiad command.

Set Up Gaiad Service

Set up a service to allow cosmovisor to run in the background as well as restart automatically if it runs into any problems:

echo "[Unit]
Description=Cosmos Hub daemon
After=network-online.target
[Service]
Environment="DAEMON_NAME=gaiad"
Environment="DAEMON_HOME=${HOME}/.gaiad"
Environment="DAEMON_RESTART_AFTER_UPGRADE=true"
Environment="DAEMON_ALLOW_DOWNLOAD_BINARIES=false"
Environment="DAEMON_LOG_BUFFER_SIZE=512"
Environment="UNSAFE_SKIP_BACKUP=true"
User=$USER
ExecStart=${HOME}/go/bin/cosmovisor start
Restart=always
RestartSec=3
LimitNOFILE=infinity
LimitNPROC=infinity
[Install]
WantedBy=multi-user.target
" >cosmovisor.service

Move this new file to the systemd directory:

sudo mv cosmovisor.service /lib/systemd/system/gaiad.service

More about validators

Please refer to the Cosmos Hub documentation on validators for a general overview of running a validator. We are using the exact same validator model and software, but with slightly different parameters and other functionality specific to the Cosmic Horizon Network.