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Distributed Validators School Testnet

Quick Links

Genesis: TBD

Block explorer: TBD

Peers: TBD

Chain Id: sputnik-practice-1

Hardware Requirements

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

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

Software Requirements

Install sputnikd, Generate Wallet and Submit GenTx

Sputnik app-chain binaries installation (sputnikd)

Sputnik app testnet binary repo https://github.com/Distributed-Validators-Synctems/sputnik-app-chain-practice

name: SputnikApp
server_name: sputnikd
version: v15.2.0
commit: 7281c9b9dc4e3087ee87f5b24e416802b52e8661
build_tags: netgo ledger

Network init

cd ~
sputnikd init "<moniker-name>" --chain-id sputnik-school-testnet

example:

sputnikd init course-participant-1 --chain-id dvs-course-testnet-4

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.

sputnikd keys add <your validator key name>

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

sputnikd keys add <key-name> --recover

or add keys using ledger

sputnikd keys add <key-name> --ledger

Check your key:

sputnikd 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 sputnikd getntx command will fail because of lack of funds.

sputnikd 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.

sputnikd gentx <key-name> 1000000000uatom \
  --chain-id=sputnik-school-testnet \
  --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"

After gentx will be ready you can find it in the ~/.sputnikd/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

sputnikd tx staking create-validator \
  --amount=1000000000uatom \
  --pubkey=$(sputnikd tendermint show-validator) \
  --chain-id=sputnik-school-testnet \
  --moniker="<moniker-name>" \
  --website=<your-node-website> \
  --commission-rate="0.10" \
  --commission-max-rate="0.20" \
  --commission-max-change-rate="0.01" \
  --gas="auto" \
  --gas-adjustment=1.3 \
  --gas-prices="0.1usignal" \
  --from=<key_name>

Run node

Install curl

sudo apt install curl -y

Download genesis

To download genesis.json file

curl https://raw.githubusercontent.com/Distributed-Validators-Synctems/sputnik-school-testnet/master/genesis.json > ~/.gaia/config/genesis.json

After downloading you need to verify your genesis.json checksum

sha256sum ~/.gaia/config/genesis.json

you should see 16f4193398f60a06925a35afe89a164b374634a7397c198a3bb55133cdb5fbea in the output.

Set the peers

PEERS="[email protected]:26656,[email protected]:27656,[email protected]:26656,[email protected]:26656"
sed -i 's|^persistent_peers *=.*|persistent_peers = "'$PEERS'"|' $HOME/.gaia/config/config.toml

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 and files

mkdir -p ~/.gaia/cosmovisor/genesis/bin
mkdir -p ~/.gaia/cosmovisor/upgrades
echo "" | sed 's/.*/{}/' > ~/.gaia/cosmovisor/genesis/upgrade-info.json

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

cp ~/go/bin/sputnikd ~/.gaia/cosmovisor/genesis/bin/sputnikd

Set Up sputnikd 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=sputnikd"
Environment="DAEMON_HOME=${HOME}/.gaia"
Environment="DAEMON_RESTART_AFTER_UPGRADE=true"
Environment="DAEMON_ALLOW_DOWNLOAD_BINARIES=false"
Environment="DAEMON_LOG_BUFFER_SIZE=512"
Environment="UNSAFE_SKIP_BACKUP=true"
User=$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/sputnikd.service

And start service:

sudo systemctl daemon-reload
sudo systemctl enable sputnikd 
sudo systemctl restart sputnikd

How you can check the logs

sudo journalctl -u sputnikd -f

Set chain-id to sputnik-school-testnet (for CLI)

sputnikd config chain-id sputnik-school-testnet

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.