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gravity node setup for testnet — GRAVITY

Official documentation:

• Validator setup instructions

Explorer:

• https://gravity.explorers.guru

Usefull tools and references

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

To migrate your validator to another machine read Migrate your validator to another machine

Hardware Requirements

Like any Cosmos-SDK chain, the hardware requirements are pretty modest.

Minimum Hardware Requirements

• 4x CPUs; the faster clock speed the better
• 8GB RAM
• 100GB of storage (SSD or NVME)
• Permanent Internet connection (traffic will be minimal during testnet; 10Mbps will be plenty - for production at least 100Mbps is expected)

Recommended Hardware Requirements

• 4x CPUs; the faster clock speed the better
• 32GB RAM
• 200GB of storage (SSD or NVME)
• Permanent Internet connection (traffic will be minimal during testnet; 10Mbps will be plenty - for production at least 100Mbps is expected)

Set up your gravity fullnode

Option 1 (automatic)

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

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

gravityd status 2>&1 | jq .SyncInfo

Create wallet

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

gravityd keys add $WALLET

(OPTIONAL) To recover your wallet using seed phrase

gravityd keys add $WALLET --recover

To get current list of wallets

gravityd keys list

Save wallet info

Add wallet and valoper address into variables

GRAVITY_WALLET_ADDRESS=$(gravityd keys show $WALLET -a)
GRAVITY_VALOPER_ADDRESS=$(gravityd keys show $WALLET --bech val -a)
echo 'export GRAVITY_WALLET_ADDRESS='${GRAVITY_WALLET_ADDRESS} >> $HOME/.bash_profile
echo 'export GRAVITY_VALOPER_ADDRESS='${GRAVITY_VALOPER_ADDRESS} >> $HOME/.bash_profile
source $HOME/.bash_profile

Create validator

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

To check your wallet balance:

gravityd query bank balances $GRAVITY_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

gravityd tx staking create-validator \
  --amount 10000000ugraviton \
  --from $WALLET \
  --commission-max-change-rate "0.01" \
  --commission-max-rate "0.2" \
  --commission-rate "0.07" \
  --min-self-delegation "1" \
  --pubkey  $(gravityd tendermint show-validator) \
  --moniker $NODENAME \
  --chain-id $GRAVITY_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 ${GRAVITY_PORT}656,${GRAVITY_PORT}660/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 gravity validator

Calculate synchronization time

This script will help you to estimate how much time it will take to fully synchronize your node
It measures average blocks per minute that are being synchronized for period of 5 minutes and then gives you results

wget -O synctime.py https://raw.githubusercontent.com/kj89/testnet_manuals/main/gravity/tools/synctime.py && python3 ./synctime.py

Check your validator key

[[ $(gravityd q staking validator $GRAVITY_VALOPER_ADDRESS -oj | jq -r .consensus_pubkey.key) = $(gravityd status | jq -r .ValidatorInfo.PubKey.value) ]] && echo -e "\n\e[1m\e[32mTrue\e[0m\n" || echo -e "\n\e[1m\e[31mFalse\e[0m\n"

Get list of validators

gravityd q staking validators -oj --limit=3000 | jq '.validators[] | select(.status=="BOND_STATUS_BONDED")' | jq -r '(.tokens|tonumber/pow(10; 6)|floor|tostring) + " \t " + .description.moniker' | sort -gr | nl

Get currently connected peer list with ids

curl -sS http://localhost:${GRAVITY_PORT}657/net_info | jq -r '.result.peers[] | "\(.node_info.id)@\(.remote_ip):\(.node_info.listen_addr)"' | awk -F ':' '{print $1":"$(NF)}'

Usefull commands

Service management

Check logs

journalctl -fu gravityd -o cat

Start service

sudo systemctl start gravityd

Stop service

sudo systemctl stop gravityd

Restart service

sudo systemctl restart gravityd

Node info

Synchronization info

gravityd status 2>&1 | jq .SyncInfo

Validator info

gravityd status 2>&1 | jq .ValidatorInfo

Node info

gravityd status 2>&1 | jq .NodeInfo

Show node id

gravityd tendermint show-node-id

Wallet operations

List of wallets

gravityd keys list

Recover wallet

gravityd keys add $WALLET --recover

Delete wallet

gravityd keys delete $WALLET

Get wallet balance

gravityd query bank balances $GRAVITY_WALLET_ADDRESS

Transfer funds

gravityd tx bank send $GRAVITY_WALLET_ADDRESS <TO_GRAVITY_WALLET_ADDRESS> 10000000ugraviton

Voting

gravityd tx gov vote 1 yes --from $WALLET --chain-id=$GRAVITY_CHAIN_ID

Staking, Delegation and Rewards

Delegate stake

gravityd tx staking delegate $GRAVITY_VALOPER_ADDRESS 10000000ugraviton --from=$WALLET --chain-id=$GRAVITY_CHAIN_ID --gas=auto

Redelegate stake from validator to another validator

gravityd tx staking redelegate <srcValidatorAddress> <destValidatorAddress> 10000000ugraviton --from=$WALLET --chain-id=$GRAVITY_CHAIN_ID --gas=auto

Withdraw all rewards

gravityd tx distribution withdraw-all-rewards --from=$WALLET --chain-id=$GRAVITY_CHAIN_ID --gas=auto

Withdraw rewards with commision

gravityd tx distribution withdraw-rewards $GRAVITY_VALOPER_ADDRESS --from=$WALLET --commission --chain-id=$GRAVITY_CHAIN_ID

Validator management

Edit validator

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

Unjail validator

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

Delete node

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

sudo systemctl stop gravityd
sudo systemctl disable gravityd
sudo rm /etc/systemd/system/gravity* -rf
sudo rm $(which gravityd) -rf
sudo rm $HOME/.gravity* -rf
sudo rm $HOME/gravity -rf
sed -i '/GRAVITY_/d' ~/.bash_profile

Pruning for state sync node

pruning="custom"
pruning_keep_recent="100"
pruning_keep_every="2000"
pruning_interval="50"
snapshot_interval="2000"
snapshot_keep_recent="5"
sed -i -e "s/^pruning *=.*/pruning = \"$pruning\"/" $HOME/.gravity/config/app.toml
sed -i -e "s/^pruning-keep-recent *=.*/pruning-keep-recent = \"$pruning_keep_recent\"/" $HOME/.gravity/config/app.toml
sed -i -e "s/^pruning-keep-every *=.*/pruning-keep-every = \"$pruning_keep_every\"/" $HOME/.gravity/config/app.toml
sed -i -e "s/^pruning-interval *=.*/pruning-interval = \"$pruning_interval\"/" $HOME/.gravity/config/app.toml
sed -i -e "s/^snapshot-interval *=.*/snapshot-interval = \"$snapshot_interval\"/" $HOME/.gravity/config/app.toml
sed -i -e "s/^snapshot-keep-recent *=.*/snapshot-keep-recent = \"$snapshot_keep_recent\"/" $HOME/.gravity/config/app.toml