💾 Installation

Update system and install build tools

sudo apt update && sudo apt upgrade -y
sudo apt install curl iptables build-essential git wget jq make gcc nano tmux htop nvme-cli pkg-config libssl-dev libleveldb-dev tar clang bsdmainutils ncdu unzip libleveldb-dev -y

Install GO

sudo rm -rf /usr/local/go
curl -Ls https://go.dev/dl/go1.24.2.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 $HOME/.profile)
echo "export PATH=$PATH:/usr/local/go/bin:$HOME/go/bin" >> $HOME/.bash_profile
source $HOME/.bash_profile
go version

Download binary files

cd $HOME
rm -rf junction
git clone https://github.com/airchains-network/junction
cd junction
git checkout v0.3.2

junctiond version --long | grep -e version -e commit
# version: v0.3.2
# commit: e897160cebbb7ca4991353dcb6b42a571dfe793d

We initialize the node to create the necessary configuration files

junctiond init <YOUR_MONIKER_NAME> --chain-id varanasi-1

Download Genesis

wget -O $HOME/.junctiond/config/genesis.json "https://raw.githubusercontent.com/airchains-network/junction-resources/refs/heads/main/varanasi-testnet/genesis/genesis.json"

sha256sum ~/.junctiond/config/genesis.json
# 2ed96ef2262d9f089a972ceaff36c416ff382ef7a26494b1d588da93713dd15c

At this stage, we can download the address book

wget -O $HOME/.junctiond/config/addrbook.json "https://share102.utsa.tech/airchains/addrbook.json"

Set up node configuration

# Set node configuration
junctiond config chain-id varanasi-1
junctiond config keyring-backend file

sed -i.bak -e "s/^minimum-gas-prices *=.*/minimum-gas-prices = \"0.00025umaf\"/;" ~/.junctiond/config/app.toml
external_address=$(wget -qO- eth0.me)
sed -i.bak -e "s/^external_address *=.*/external_address = \"$external_address:26656\"/" $HOME/.junctiond/config/config.toml
peers="cfb052e64e508f4b40f0ec07b52a31abfda82270@95.217.62.179:11956,db686fcfdf0b4676d601d5beb11faee5ad96bff1@37.27.71.199:28656,ec7d3566e70f479a4a6dd98d1e02e8827cf34f76@72.251.3.24:56256,f84b41b95e828ee915aea19dd656cca7d39cf47b@37.17.244.207:33656,306e1cc0936111831eedfa861abe3989d04acc19@158.220.114.0:26656,c0f3abcd838aeb72f6c7a1c817407bfe021547f3@135.181.139.249:26656"
sed -i -e "s|^persistent_peers *=.*|persistent_peers = \"$peers\"|" $HOME/.junctiond/config/config.toml

Set up pruning

pruning="custom"
pruning_keep_recent="1000"
pruning_interval="10"
sed -i -e "s/^pruning *=.*/pruning = \"$pruning\"/" $HOME/.junctiond/config/app.toml
sed -i -e "s/^pruning-keep-recent *=.*/pruning-keep-recent = \"$pruning_keep_recent\"/" $HOME/.junctiond/config/app.toml
sed -i -e "s/^pruning-interval *=.*/pruning-interval = \"$pruning_interval\"/" $HOME/.junctiond/config/app.toml

Set up indexer

indexer="null"
sed -i -e "s/^indexer *=.*/indexer = \"$indexer\"/" $HOME/.junctiond/config/config.toml

Create a service file

sudo tee /etc/systemd/system/junctiond.service > /dev/null <<EOF
[Unit]
Description=junctiond
After=network-online.target

[Service]
User=$USER
ExecStart=$(which junctiond) start
Restart=on-failure
RestartSec=3
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable junctiond
systemctl restart junctiond && journalctl -u junctiond -f -o cat

IIf peers are not connected for a long time, then you need to use state synchronization or loading from a snapshot.