💾Node Installation

Juno Testnet guide

EXPLORER

• Minimum hardware requirements:

Node Type	CPU	RAM	Storage
Testnet	8	16GB	250GB

1) Auto_install script

source <(curl -s https://raw.githubusercontent.com/111STAVR111/props/refs/heads/main/Juno/Testnet/juno-t)

2) Manual installation

Preparing the server

sudo apt update && sudo apt upgrade -y
sudo apt install curl tar wget clang pkg-config libssl-dev jq build-essential bsdmainutils git make ncdu gcc git jq chrony liblz4-tool -y

GO 1.21.6

ver="1.21.6"
wget "https://golang.org/dl/go$ver.linux-amd64.tar.gz"
sudo rm -rf /usr/local/go
sudo tar -C /usr/local -xzf "go$ver.linux-amd64.tar.gz"
rm "go$ver.linux-amd64.tar.gz"
echo "export PATH=$PATH:/usr/local/go/bin:$HOME/go/bin" >> $HOME/.bash_profile
source $HOME/.bash_profile
go version

Build 23.05.25

cd $HOME && mkdir $HOME/go/bin/
git clone https://github.com/CosmosContracts/juno
cd juno
git checkout v29.0.0
make install

junod version --long | grep -e version -e commit

• version: v29.0.0

• commit: a63f2d3a65374a47d991cbed559f2b8e878db0a4

Initiation

junod init STAVR_guide --chain-id=uni-7
junod config chain-id uni-7

Create/recover wallet

junod keys add <walletname>
           OR
junod keys add <walletname> --recover

Download Genesis and Addrbook

wget -O $HOME/.juno/config/genesis.json "https://server-1.stavr.tech/Testnet/Juno/genesis.json"
wget -O $HOME/.juno/config/addrbook.json "https://server-1.stavr.tech/Testnet/Juno/addrbook.json"

sha256sum $HOME/.juno/config/genesis.json

• 627f0b5dca4c63820282fb3e44ba959de4435c86b2d1dc8169485b7ef66521bc

Set up the minimum gas price and Peers/Seeds/Filter peers/MaxPeers

sed -i.bak -e "s/^minimum-gas-prices *=.*/minimum-gas-prices = \"0ujuno\"/;" ~/.juno/config/app.toml
sed -i -e "s/^filter_peers *=.*/filter_peers = \"true\"/" $HOME/.juno/config/config.toml
external_address=$(wget -qO- eth0.me) 
sed -i.bak -e "s/^external_address *=.*/external_address = \"$external_address:26656\"/" $HOME/.juno/config/config.toml
peers=""
sed -i.bak -e "s/^persistent_peers *=.*/persistent_peers = \"$peers\"/" $HOME/.juno/config/config.toml
seeds=""
sed -i.bak -e "s/^seeds =.*/seeds = \"$seeds\"/" $HOME/.juno/config/config.toml
sed -i 's/max_num_inbound_peers =.*/max_num_inbound_peers = 50/g' $HOME/.juno/config/config.toml
sed -i 's/max_num_outbound_peers =.*/max_num_outbound_peers = 50/g' $HOME/.juno/config/config.toml

Pruning (optional)

pruning="custom"
pruning_keep_recent="1000"
pruning_keep_every="0"
pruning_interval="10"
sed -i -e "s/^pruning *=.*/pruning = \"$pruning\"/" $HOME/.juno/config/app.toml
sed -i -e "s/^pruning-keep-recent *=.*/pruning-keep-recent = \"$pruning_keep_recent\"/" $HOME/.juno/config/app.toml
sed -i -e "s/^pruning-keep-every *=.*/pruning-keep-every = \"$pruning_keep_every\"/" $HOME/.juno/config/app.toml
sed -i -e "s/^pruning-interval *=.*/pruning-interval = \"$pruning_interval\"/" $HOME/.juno/config/app.toml

Indexer (optional)

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

Create a service file

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

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

[Install]
WantedBy=multi-user.target
EOF

StateSync juno Testnet

SNAP_RPC=https://juno.rpc.t.stavr.tech:443
LATEST_HEIGHT=$(curl -s $SNAP_RPC/block | jq -r .result.block.header.height); \
BLOCK_HEIGHT=$((LATEST_HEIGHT - 1000)); \
TRUST_HASH=$(curl -s "$SNAP_RPC/block?height=$BLOCK_HEIGHT" | jq -r .result.block_id.hash)
echo $LATEST_HEIGHT $BLOCK_HEIGHT $TRUST_HASH

sed -i.bak -E "s|^(enable[[:space:]]+=[[:space:]]+).*$|\1true| ; \
s|^(rpc_servers[[:space:]]+=[[:space:]]+).*$|\1\"$SNAP_RPC,$SNAP_RPC\"| ; \
s|^(trust_height[[:space:]]+=[[:space:]]+).*$|\1$BLOCK_HEIGHT| ; \
s|^(trust_hash[[:space:]]+=[[:space:]]+).*$|\1\"$TRUST_HASH\"| ; \
s|^(seeds[[:space:]]+=[[:space:]]+).*$|\1\"\"|" $HOME/.juno/config/config.toml
junod tendermint unsafe-reset-all --home $HOME/.juno
sed -i -e "s/^snapshot-interval *=.*/snapshot-interval = \"1000\"/" $HOME/.juno/config/app.toml
curl -o - -L https://juno-t.wasm.stavr.tech/wasm-junot.tar.lz4 | lz4 -c -d - | tar -x -C $HOME/.juno/ --strip-components 2
wget -O $HOME/.juno/config/addrbook.json "https://server-1.stavr.tech/Testnet/Juno/addrbook.json"
sudo systemctl restart junod && journalctl -fu junod -n100 -ocat

SnapShot Testnet updated every 10 hours

https://server-1.stavr.tech/Testnet/Juno/

cd $HOME
apt install lz4
sudo systemctl stop junod
cp $HOME/.juno/data/priv_validator_state.json $HOME/.junod/priv_validator_state.json.backup
rm -rf $HOME/.juno/data
LATEST_SNAPSHOT=$(curl -s https://server-1.stavr.tech/Testnet/Juno/ | grep -oE 'juno-snap-[0-9]+\.tar\.lz4' | while read SNAPSHOT; do HEIGHT=$(curl -s "https://server-1.stavr.tech/Testnet/Juno/${SNAPSHOT%.tar.lz4}-info.txt" | awk '/Block height:/ {print $3}'); echo "$SNAPSHOT $HEIGHT"; done | sort -k2 -nr | head -n 1 | awk '{print $1}')
curl -o - -L https://server-1.stavr.tech/Testnet/Juno/$LATEST_SNAPSHOT | lz4 -c -d - | tar -x -C $HOME/.juno
mv $HOME/.juno/priv_validator_state.json.backup $HOME/.juno/data/priv_validator_state.json
wget -O $HOME/.juno/config/addrbook.json "https://server-1.stavr.tech/Testnet/Juno/addrbook.json"
sudo systemctl restart junod && journalctl -fu junod -n100 -ocat

Start

sudo systemctl daemon-reload
sudo systemctl enable junod 
sudo systemctl restart junod && sudo journalctl -fu junod -o cat

Create validator

junod tx staking create-validator \
--commission-rate 0.1 \
--commission-max-rate 0.1 \
--commission-max-change-rate 0.1 \
--min-self-delegation "1" \
--amount 1000000ujuno \
--pubkey $(junod tendermint show-validator) \
--from <wallet> \
--moniker="STAVR_guide" \
--chain-id uni-7 \
--gas 350000 \
--identity="" \
--website="" \
--details="" -y

🧩Services and Tools🧩

Monitoring

You can set up your node status alarm here - Monitoring

Security

You can create secure management of your wallet and your node by following this links.

TMKMS Wallet Security

Delete node

sudo systemctl stop junod
sudo systemctl disable junod
rm /etc/systemd/system/junod.service
sudo systemctl daemon-reload
cd $HOME
rm -rf juno
rm -rf .juno
rm -rf $(which junod)