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Cosmic-Horizon node setup for Testnet — darkenergy-1 (v0.1)

Official documentation:

• Validator setup instructions

Explorer:

• Nodes Guru Coho Explorer

Cosmic-Horizon fullnode system requirements

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

• 4 vCPU
• 8 GB RAM
• 200 GB Disk space

Usefull tools I have created for coho

To set up monitoring for your validator node navigate to Set up monitoring and alerting for coho validator

Set up your coho fullnode

Option 1 (automatic)

You can setup your coho fullnode in few minutes by using automated script below. It will prompt you to input your validator node name!

wget -O coho_testnet.sh https://raw.githubusercontent.com/kj89/testnet_manuals/main/coho/coho_testnet.sh && chmod +x coho_testnet.sh && ./coho_testnet.sh

Option 2 (manual)

You can follow manual guide if you better prefer setting up node manually

Post installation

When installation is finished please load variables into system

source $HOME/.bash_profile

Next you have to make sure your validator is syncing blocks. You can use command below to check synchronization status

cohod status 2>&1 | jq .SyncInfo

To check logs

journalctl -u cohod -f -o cat

Create wallet

To create new wallet you can use command below. Don’t forget to save the mnemonic

cohod keys add $WALLET

(OPTIONAL) To recover your wallet using seed phrase

cohod keys add $WALLET --recover

To get current list of wallets

cohod keys list

Save wallet info

Add wallet address

WALLET_ADDRESS=$(cohod keys show $WALLET -a)

Add valoper address

VALOPER_ADDRESS=$(cohod keys show $WALLET --bech val -a)

Load variables into system

echo 'export WALLET_ADDRESS='${WALLET_ADDRESS} >> $HOME/.bash_profile
echo 'export VALOPER_ADDRESS='${VALOPER_ADDRESS} >> $HOME/.bash_profile
source $HOME/.bash_profile

Top up your wallet balance using faucet

To get 20 free tokens in defund-private-1 testnet:

• navigate to https://bitszn.com/faucets.html
• switch to COSMOS tab and select Cosmic Horizon Testnet
• input your wallet address and click Request

Create validator

Before creating validator please make sure that you have at least 1 coho (1 coho is equal to 1000000 ucoho) and your node is synchronized

To check your wallet balance:

cohod query bank balances $WALLET_ADDRESS

If your wallet does not show any balance than probably your node is still syncing. Please wait until it finish to synchronize and then continue

To create your validator run command below

cohod tx staking create-validator \
  --amount 1000000ucoho \
  --from $WALLET \
  --commission-max-change-rate "0.01" \
  --commission-max-rate "0.2" \
  --commission-rate "0.07" \
  --min-self-delegation "1" \
  --pubkey  $(cohod tendermint show-validator) \
  --moniker $NODENAME \
  --chain-id $CHAIN_ID

Security

To protect you keys please make sure you follow basic security rules

Set up ssh keys for authentication

Good tutorial on how to set up ssh keys for authentication to your server can be found here

Basic Firewall security

Start by checking the status of ufw.

sudo ufw status

Sets the default to allow outgoing connections, deny all incoming except ssh and 26656. Limit SSH login attempts

sudo ufw default allow outgoing
sudo ufw default deny incoming
sudo ufw allow ssh/tcp
sudo ufw limit ssh/tcp
sudo ufw allow 26656,26660/tcp
sudo ufw enable

Monitoring

To monitor and get alerted about your validator health status you can use my guide on Set up monitoring and alerting for coho validator

Usefull commands

Service management

Check logs

journalctl -fu cohod -o cat

Start service

systemctl start cohod

Stop service

systemctl stop cohod

Restart service

systemctl restart cohod

Node info

Synchronization info

cohod status 2>&1 | jq .SyncInfo

Validator info

cohod status 2>&1 | jq .ValidatorInfo

Node info

cohod status 2>&1 | jq .NodeInfo

Show node id

cohod tendermint show-node-id

Wallet operations

List of wallets

cohod keys list

Recover wallet

cohod keys add $WALLET --recover

Delete wallet

cohod keys delete $WALLET

Get wallet balance

cohod query bank balances $WALLET_ADDRESS

Transfer funds

cohod tx bank send $WALLET_ADDRESS <TO_WALLET_ADDRESS> 10000000ucoho

Staking, Delegation and Rewards

Delegate stake

cohod tx staking delegate $VALOPER_ADDRESS 10000000ucoho --from=$WALLET --chain-id=$CHAIN_ID --gas=auto

Redelegate stake from validator to another validator

cohod tx staking redelegate <srcValidatorAddress> <destValidatorAddress> 10000000ucoho --from=$WALLET --chain-id=$CHAIN_ID --gas=auto

Withdraw all rewards

cohod tx distribution withdraw-all-rewards --from=$WALLET --chain-id=$CHAIN_ID --gas=auto

Withdraw rewards with commision

cohod tx distribution withdraw-rewards $VALOPER_ADDRESS --from=$WALLET --commission --chain-id=$CHAIN_ID

Validator management

Edit validator

cohod tx staking edit-validator \
--moniker=$NODENAME \
--identity=<your_keybase_id> \
--website="<your_website>" \
--details="<your_validator_description>" \
--chain-id=$CHAIN_ID \
--from=$WALLET

Unjail validator

cohod tx slashing unjail \
  --broadcast-mode=block \
  --from=$WALLET \
  --chain-id=$CHAIN_ID \
  --gas=auto

Delete node

This commands will completely remove node from server. Use at your own risk!

systemctl stop cohod
systemctl disable cohod
rm /etc/systemd/system/coho* -rf
rm $(which cohod) -rf
rm $HOME/.coho* -rf
rm $HOME/coho -rf