# Node Installation

## [EXPLORER](https://explorer.stavr.tech/Lumen-Mainnet/staking)

* **Minimum hardware requirements**:

| Node Type | CPU | RAM  | Storage |
| --------- | --- | ---- | ------- |
| Mainnet   | 8   | 16GB | 250GB   |

## 1) Auto\_install script

```bash
SOOON
```

## 2) Manual installation

#### Preparing the server

```bash
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 1.21.13

```bash
ver="1.21.13"
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 06.01.26

```bash
cd $HOME && git clone https://github.com/network-lumen/validator-kit.git
cd validator-kit

./join.sh <moniker>

$HOME/validator-kit/bin/lumend version
# v1.3.0

cp $HOME//validator-kit/bin/lumend /usr/local/bin/lumend
lumend version
# v1.3.0

journalctl -fu lumend -n100 -ocat
```

`lumend version --long | grep -e commit -e version`

* version: v1.3.0
* commit: 597b549

### Create/recover wallet

```bash
lumend keys add validator --home ~/.lumen --keyring-backend test
           OR
lumend keys add validator --home ~/.lumen --recover --keyring-backend test
```

### Download  Addrbook and Genesis

```python
wget -O $HOME/.lumen/config/addrbook.json "https://server-1.stavr.tech/Mainnet/Lumen/addrbook.json"
wget -O $HOME/.lumen/config/genesis.json "https://server-1.stavr.tech/Mainnet/Lumen/genesis.json"
```

`sha256sum $HOME/.lumen/config/genesis.json`

* b82e9c5ceaf521cf875026460c0cbae60e86c2cfb3e75a4a9411d5969a80a05e

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

```bash
external_address=$(wget -qO- eth0.me) 
sed -i.bak -e "s/^external_address *=.*/external_address = \"$external_address:26656\"/" $HOME/.lumen/config/config.toml
peers=""
sed -i.bak -e "s/^persistent_peers *=.*/persistent_peers = \"$peers\"/" $HOME/.lumen/config/config.toml
seeds=""
sed -i.bak -e "s/^seeds =.*/seeds = \"$seeds\"/" $HOME/.lumen/config/config.toml
sed -i 's/max_num_inbound_peers =.*/max_num_inbound_peers = 50/g' $HOME/.lumen/config/config.toml
sed -i 's/max_num_outbound_peers =.*/max_num_outbound_peers = 50/g' $HOME/.lumen/config/config.toml
```

## StateSync Lumen Mainnet

```bash
systemctl stop lumend
SNAP_RPC=https://lumen.rpc.m.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/.lumen/config/config.toml
lumend tendermint unsafe-reset-all --home /root/.lumen
wget -O $HOME/.lumen/config/addrbook.json "https://server-1.stavr.tech/Mainnet/Lumen/addrbook.json"
sudo systemctl restart lumend && journalctl -fu lumend -n1000 -ocat
```

## SnapShot Mainnet updated every 5 hours

{% hint style="success" %}
<https://server-1.stavr.tech/Mainnet/Lumen/>
{% endhint %}

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

### Start

```bash
sudo systemctl daemon-reload
sudo systemctl enable lumend
sudo systemctl restart lumend && sudo journalctl -fu lumend -n1000 -ocat
```

#### Create validator

```python
cd $HOME/validator-kit/
HOME_DIR=~/.lumen FROM=validator \
  ops/scripts/blockchain/become_validator.sh --moniker "STAVR_Guide"
```

## [🧩Services and Tools🧩](https://stavr-team.gitbook.io/nodes-guides/mainnets/lumen/sync)

## Monitoring

You can set up your node status alarm here - [Monitoring](https://stavr-team.gitbook.io/nodes-guides/monitoring)

## Security

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

[TMKMS](https://stavr-team.gitbook.io/nodes-guides/tmkms)               [Wallet Security](https://stavr-team.gitbook.io/nodes-guides/wallet-security)

### Delete node

```bash
systemctl stop lumend
systemctl disable lumend
rm /etc/systemd/system/lumend.service
systemctl daemon-reload
cd $HOME
rm -rf .lumen validator-kit
rm -rf $(which lumend)
```


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