Cosmos_validator

Chapter 14: Setting Up Cosmos Validator Node

Overview

A validator in Cosmos is a node that participates in the consensus process by proposing and voting on blocks. Running a validator requires technical expertise and capital (stake).

14.1 Validator Requirements

Hardware Requirements

Component	Minimum	Recommended
CPU	4 cores	8+ cores
RAM	8 GB	16-32 GB
Storage	500 GB SSD	1 TB NVMe
Network	100 Mbps	1 Gbps

Staking Requirements

Parameter	Value
Minimum Stake	1 ATOM (self-delegation)
Jail Time	10 minutes to 2 days
Unbonding Period	21 days

14.2 Installing Gaia (Cosmos Hub)

Step 1: Install Go

# Install Go
wget https://go.dev/dl/go1.21.5.linux-amd64.tar.gz
sudo tar -C /usr/local -xzf go1.21.5.linux-amd64.tar.gz
export PATH=$PATH:/usr/local/go/bin

# Verify
go version

Step 2: Build Gaiad

# Clone repository
git clone https://github.com/cosmos/gaia.git
cd gaia

# Build
make install

# Verify
gaiad version

14.3 Initialize Validator

Initialize Node

# Initialize chain
gaiad init my-validator --chain-id cosmoshub-4

# This creates:
# - ~/.gaia/config/genesis.json
# - ~/.gaia/config/config.toml
# - ~/.gaia/data/

Create Wallet

# Create new key
gaiad keys add validator-wallet

# Recover existing wallet
gaiad keys add validator-wallet --recover

Get Tokens

# Get testnet tokens from faucet
# Or buy ATOM from exchange for mainnet

14.4 Configuration

Edit Config

nano ~/.gaia/config/config.toml

# Enable RPC
rpc.laddr = "tcp://0.0.0.0:26657"

# Enable CORS
api.enable = true

# Persistent peers
persistent_peers = "id@peer1:26656,id@peer2:26656"

# Min gas price
minimum_gas_prices = "0.0025uatom"

Create Systemd Service

[Unit]
Description=Cosmos Validator
After=network.target

[Service]
User=cosmos
Type=simple
ExecStart=/usr/local/bin/gaiad start
Restart=always
RestartSec=10
LimitNOFILE=4096

[Install]
WantedBy=multi-user.target

14.5 Create Validator

Start Node First

# Start and catch up
gaiad start

Create Validator Transaction

gaiad tx staking create-validator \
  --amount=1000000uatom \
  --pubkey=$(gaiad tendermint show-validator) \
  --moniker="my-validator" \
  --chain-id=cosmoshub-4 \
  --commission-rate="0.10" \
  --commission-max-rate="0.20" \
  --commission-max-change-rate="0.01" \
  --min-self-delegation="1" \
  --from=validator-wallet \
  --gas=auto \
  --gas-adjustment=1.5

14.6 Validator Commands

Check Status

# Check validator status
gaiad query staking validator <validator-address>

# Check jailed status
gaiad query staking validator <address> | grep jailed

Common Operations

# Edit validator
gaiad tx staking edit-validator \
  --moniker="new-name" \
  --website="https://example.com" \
  --details="Description" \
  --from=validator-wallet

# Unjail (if jailed)
gaiad tx slashing unjail \
  --from=validator-wallet \
  --chain-id=cosmoshub-4

# Delegate more tokens
gaiad tx staking delegate <validator-address> <amount> \
  --from=delegator-wallet \
  --chain-id=cosmoshub-4

14.7 Monitoring Validators

Key Metrics

Metric	Description
Block height	Current chain height
Missed blocks	Number of blocks missed
Jailed status	Whether validator is jailed
Voting power	Validator’s stake

Check Commands

# Check block height
gaiad status | grep -i height

# Check missed blocks
gaiad query slashing signing-info <validator-consensus-pubkey>

# Check voting power
gaiad query staking validators -o json | jq '.validators[] | select(.description.moniker=="my-validator") | .tokens'

14.8 Interview Questions

Question	Answer
What is a validator in Cosmos?	Node that participates in Tendermint consensus
How to become a validator?	Stake ATOM and run validator software
What is jailing?	Penalty for missing too many blocks
Unbonding period?	21 days to undelegate

Summary

Validators require staking ATOM
Hardware: 8+ cores, 16GB RAM, 1TB SSD
Use Cosmovisor for automated upgrades
Monitor missed blocks to avoid jailing

Next Chapter

In Chapter 15: Cosmos Full Node Setup, we’ll cover full node setup.

Last Updated: 2026-02-20