๐Ÿ’พNode Installation

Airchains Testnet guide

  • Minimum hardware requirements:

Node Type
CPU
RAM
Storage

Testnet

4

8GB

150GB

1) Auto_install script

wget -O airchaint https://raw.githubusercontent.com/111STAVR111/props/main/Airchains/airchaint && chmod +x airchaint && ./airchaint

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 21.04.25

cd $HOME && mkdir -p go/bin/
git clone https://github.com/airchains-network/junction
cd junction
git checkout v0.3.2
make install

junctiond version --long | grep -e commit -e version

  • version: 0.3.2

  • commit: 8bc30fe9d82250e769a4b84e9f9aa4898ea27fe5

Initiation

junctiond init STAVR_guide --chain-id=varanasi-1

Create/recover wallet

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

Download Genesis and Addrebook

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

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

  • 2ed96ef2262d9f089a972ceaff36c416ff382ef7a26494b1d588da93713dd15c

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

sed -i 's/minimum-gas-prices =.*$/minimum-gas-prices = "0.0025uamf"/' $HOME/.junctiond/config/app.toml
external_address=$(wget -qO- eth0.me) 
sed -i.bak -e "s/^external_address *=.*/external_address = \"$external_address:26656\"/" $HOME/.junctiond/config/config.toml
peers=""
sed -i.bak -e "s/^persistent_peers *=.*/persistent_peers = \"$peers\"/" $HOME/.junctiond/config/config.toml
seeds=""
sed -i.bak -e "s/^seeds =.*/seeds = \"$seeds\"/" $HOME/.junctiond/config/config.toml
sed -i 's/max_num_inbound_peers =.*/max_num_inbound_peers = 50/g' $HOME/.junctiond/config/config.toml
sed -i 's/max_num_outbound_peers =.*/max_num_outbound_peers = 50/g' $HOME/.junctiond/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\"/" $HOME/.junctiond/config/app.toml
sed -i -e "s/^pruning-keep-recent *=.*/pruning-keep-recent = \"$pruning_keep_recent\"/" $HOME/.junctiond/config/app.toml
sed -i -e "s/^pruning-keep-every *=.*/pruning-keep-every = \"$pruning_keep_every\"/" $HOME/.junctiond/config/app.toml
sed -i -e "s/^pruning-interval *=.*/pruning-interval = \"$pruning_interval\"/" $HOME/.junctiond/config/app.toml

Indexer (optional)

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=junction
After=network-online.target

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

[Install]
WantedBy=multi-user.target
EOF

StateSync Airchains Testnet

SNAP_RPC=https://airchains.rpc.t.stavr.tech:443
cp $HOME/.junctiond/data/priv_validator_state.json $HOME/.junctiond/priv_validator_state.json.backup
sed -i -e "/seeds =/ s/= .*/= \"$SEEDS\"/"  $HOME/.junctiond/config/config.toml
LATEST_HEIGHT=$(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/.junctiond/config/config.toml
junctiond tendermint unsafe-reset-all --home $HOME/.junctiond--keep-addr-book
mv $HOME/.junctiond/priv_validator_state.json.backup $HOME/.junctiond/data/priv_validator_state.json
wget -O $HOME/.junctiond/config/addrbook.json "https://server-1.stavr.tech/Testnet/Airchains/genesis.json"
sudo systemctl restart junctiond && journalctl -fu junctiond -n100 -ocat

SnapShot Testnet updated every 5 hours

cd $HOME
apt install lz4
sudo systemctl stop junctiond
cp $HOME/.junctiond/data/priv_validator_state.json $HOME/.junctiond/priv_validator_state.json.backup
rm -rf $HOME/.junctiond/data
LATEST_SNAPSHOT=$(curl -s https://server-1.stavr.tech/Testnet/Airchains/ | grep -oE 'air-snap-[0-9]+\.tar\.lz4' | while read SNAPSHOT; do HEIGHT=$(curl -s "https://server-1.stavr.tech/Testnet/Airchains/${SNAPSHOT%.tar.lz4}-info.txt" | awk '/Block height:/ {print $3}'); echo "$SNAPSHOT $HEIGHT"; done | sort -k2 -nr | head -n 1 | awk '{print $1}')
curl -o - -L https://server-1.stavr.tech/Testnet/Airchains/$LATEST_SNAPSHOT | lz4 -c -d - | tar -x -C $HOME/.junctiond
mv $HOME/.junctiond/priv_validator_state.json.backup $HOME/.junctiond/data/priv_validator_state.json
wget -O $HOME/.junctiond/config/addrbook.json "https://server-1.stavr.tech/Testnet/Airchains/addrbook.json"
sudo systemctl restart junctiond && journalctl -fu junctiond -n1000 -ocat

Start

sudo systemctl daemon-reload
sudo systemctl enable junctiond
sudo systemctl restart junctiond && sudo journalctl -fu junctiond -n100 -ocat

Create validator

#pubkey
junctiond tendermint show-validator --home /root/.junctiond
cd $HOME
nano /root/.junctiond/validator.json
{
  "pubkey": {"#pubkey"},
  "amount": "1000000amf",
  "moniker": "STAVR_Guide",
  "commission-rate": "0.05",
  "commission-max-rate": "1",
  "commission-max-change-rate": "1",
  "min-self-delegation": "1"
}
junctiond tx staking create-validator $HOME/.junctiond/validator.json --from WalletName --fees 200amf --chain-id varanasi-1 -y

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

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