Installation

Chain ID	Latest Version Tag	Custom Port
layertest-3	v3.0.3	184

Setup validator name

Replace YOUR_MONIKER_GOES_HERE with your validator name

MONIKER="YOUR_MONIKER_GOES_HERE"

Install dependencies

Update system and install build tools

sudo apt -q update
sudo apt -qy install curl git jq lz4 build-essential
sudo apt -qy upgrade

Install Go

sudo rm -rf /usr/local/go
curl -Ls https://go.dev/dl/go1.22.11.linux-amd64.tar.gz | sudo tar -xzf - -C /usr/local
eval $(echo 'export PATH=$PATH:/usr/local/go/bin' | sudo tee /etc/profile.d/golang.sh)
eval $(echo 'export PATH=$PATH:$HOME/go/bin' | tee -a $HOME/.profile)

Download and build binaries

# Clone project repository
cd $HOME
rm -rf layer
git clone https://github.com/tellor-io/layer.git
cd layer
git checkout v3.0.3

# Build binaries
make build

# Prepare binaries for Cosmovisor
mkdir -p $HOME/.layer/cosmovisor/genesis/bin
mv build/layerd $HOME/.layer/cosmovisor/genesis/bin/
rm -rf build

# Create application symlinks
ln -s $HOME/.layer/cosmovisor/genesis $HOME/.layer/cosmovisor/current -f
sudo ln -s $HOME/.layer/cosmovisor/current/bin/layerd /usr/local/bin/layerd -f

Install Cosmovisor and create a service

A Layer node uses the following variables: TOKEN_BRIDGE_CONTRACT: the token bridge contract address. ETH_RPC_URL: A reliable sepolia RPC url for calling the bridge contract.

# Download and install Cosmovisor
go install cosmossdk.io/tools/cosmovisor/cmd/cosmovisor@v1.6.0

# Create service
sudo tee /etc/systemd/system/tellor-testnet.service > /dev/null << EOF
[Unit]
Description=tellor node service
After=network-online.target

[Service]
User=$USER
ExecStart=$(which cosmovisor) run start --price-daemon-enabled=false --key-name tellor
Restart=on-failure
RestartSec=10
LimitNOFILE=65535
Environment="DAEMON_HOME=$HOME/.layer"
Environment="DAEMON_NAME=layerd"
Environment="UNSAFE_SKIP_BACKUP=true"
Environment="PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:$HOME/.layer/cosmovisor/current/bin"
Environment="ETH_RPC_URL=wss://a.good.sepolia.rpc.url"
Environment="TOKEN_BRIDGE_CONTRACT=0x6ac02f3887b358591b8b2d22cfb1f36fa5843867"

[Install]
WantedBy=multi-user.target
EOF
sudo systemctl daemon-reload
sudo systemctl enable tellor-testnet.service

Set node configuration

# Set node configuration
layerd config set client chain-id layertest-3
layerd config set client keyring-backend test
layerd config set client node tcp://localhost:18457

Initialize the node

# Initialize the node
layerd init $MONIKER --chain-id layertest-3

# Download genesis and addrbook
curl -Ls https://snapshots.kjnodes.com/tellor-testnet/genesis.json > $HOME/.layer/config/genesis.json
curl -Ls https://snapshots.kjnodes.com/tellor-testnet/addrbook.json > $HOME/.layer/config/addrbook.json

# Add seeds
sed -i -e "s|^seeds *=.*|seeds = \"3f472746f46493309650e5a033076689996c8881@tellor-testnet.rpc.kjnodes.com:18459\"|" $HOME/.layer/config/config.toml

# Set minimum gas price
sed -i -e "s|^minimum-gas-prices *=.*|minimum-gas-prices = \"0.000025loya\"|" $HOME/.layer/config/app.toml

# Set pruning
sed -i \
  -e 's|^pruning *=.*|pruning = "custom"|' \
  -e 's|^pruning-keep-recent *=.*|pruning-keep-recent = "100"|' \
  -e 's|^pruning-keep-every *=.*|pruning-keep-every = "0"|' \
  -e 's|^pruning-interval *=.*|pruning-interval = "19"|' \
  $HOME/.layer/config/app.toml

# Set custom ports
sed -i -e "s%^proxy_app = \"tcp://127.0.0.1:26658\"%proxy_app = \"tcp://127.0.0.1:18458\"%; s%^laddr = \"tcp://127.0.0.1:26657\"%laddr = \"tcp://127.0.0.1:18457\"%; s%^pprof_laddr = \"localhost:6060\"%pprof_laddr = \"localhost:18460\"%; s%^laddr = \"tcp://0.0.0.0:26656\"%laddr = \"tcp://0.0.0.0:18456\"%; s%^prometheus_listen_addr = \":26660\"%prometheus_listen_addr = \":18466\"%" $HOME/.layer/config/config.toml
sed -i -e "s%^address = \"tcp://0.0.0.0:1317\"%address = \"tcp://0.0.0.0:18417\"%; s%^address = \":8080\"%address = \":18480\"%; s%^address = \"0.0.0.0:9090\"%address = \"0.0.0.0:18490\"%; s%^address = \"0.0.0.0:9091\"%address = \"0.0.0.0:18491\"%; s%:8545%:18445%; s%:8546%:18446%; s%:6065%:18465%" $HOME/.layer/config/app.toml

Download latest chain snapshot

curl -L https://snapshots.kjnodes.com/tellor-testnet/snapshot_latest.tar.lz4 | tar -Ilz4 -xf - -C $HOME/.layer
[[ -f $HOME/.layer/data/upgrade-info.json ]] && cp $HOME/.layer/data/upgrade-info.json $HOME/.layer/cosmovisor/genesis/upgrade-info.json

Start service and check the logs

sudo systemctl start tellor-testnet.service && sudo journalctl -u tellor-testnet.service -f --no-hostname -o cat