# Node Installation

## [EXPLORER](https://explorer.stavr.tech/Empeiria-Testnet/staking)

* **Minimum hardware requirements**:

| Node Type | CPU | RAM | Storage |
| --------- | --- | --- | ------- |
| Testnet   | 4   | 8GB | 150GB   |

## 1) Auto\_install script

```bash
wget -O empam https://raw.githubusercontent.com/111STAVR111/props/main/Empeiria/empam && chmod +x empam && ./empam
```

## 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 1.21.6

```bash
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 04.03.25

```bash
cd $HOME && mkdir -p go/bin/
curl -LO https://github.com/empe-io/empe-chain-releases/raw/master/v0.3.0/emped_v0.3.0_linux_amd64.tar.gz
tar -xvf emped_v0.3.0_linux_amd64.tar.gz
rm -rf emped_v0.3.0_linux_amd64.tar.gz
chmod +x emped
sudo mv emped ~/go/bin
```

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

* version: 0.3.0
* commit: 175bb46dcc1c9ac8b7457fe7b477cfeb0c914ff7

## Initiation

```python
emped init STAVR_guide --chain-id empe-testnet-2
```

### Create/recover wallet

```bash
emped keys add <walletname>
           OR
emped keys add <walletname> --recover
```

### Download Genesis

```python
wget -O $HOME/.empe-chain/config/genesis.json "https://raw.githubusercontent.com/111STAVR111/props/main/Empeiria/genesis.json"
```

`sha256sum $HOME/.empe-chain/config/genesis.json`

* 2aabbc5e3cabbd0f2cdb9a442dc476397c05b624f42ee23e832fdf1c48f60c91

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

```bash
sed -i.bak -e "s/^minimum-gas-prices *=.*/minimum-gas-prices = \"0.0025uempe\"/;" ~/.empe-chain/config/app.toml
external_address=$(wget -qO- eth0.me) 
sed -i.bak -e "s/^external_address *=.*/external_address = \"$external_address:26656\"/" $HOME/.empe-chain/config/config.toml
peers=""
sed -i.bak -e "s/^persistent_peers *=.*/persistent_peers = \"$peers\"/" $HOME/.empe-chain/config/config.toml
seeds=""
sed -i.bak -e "s/^seeds =.*/seeds = \"$seeds\"/" $HOME/.empe-chain/config/config.toml
sed -i 's/max_num_inbound_peers =.*/max_num_inbound_peers = 50/g' $HOME/.empe-chain/config/config.toml
sed -i 's/max_num_outbound_peers =.*/max_num_outbound_peers = 50/g' $HOME/.empe-chain/config/config.toml
```

#### Pruning (optional)

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

#### Indexer (optional)

```bash
indexer="null" &&
sed -i -e "s/^indexer *=.*/indexer = \"$indexer\"/" $HOME/.empe-chain/config/config.toml
```

### Download addrbook

```bash
wget -O $HOME/.empe-chain/config/addrbook.json "https://raw.githubusercontent.com/111STAVR111/props/main/Empeiria/addrbook.json"
```

## Create a service file

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

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

[Install]
WantedBy=multi-user.target
EOF
```

## StateSync Empeiria Testnet

```bash
SNAP_RPC=https://empe.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\"|" $HOME/.empe-chain/config/config.toml
emped tendermint unsafe-reset-all --home $HOME/.empe-chain
wget -O $HOME/.empe-chain/config/addrbook.json "https://raw.githubusercontent.com/111STAVR111/props/main/Empeiria/addrbook.json"
sudo systemctl restart emped && journalctl -fu emped -o cat
```

## SnapShot Testnet updated every 5 hours

```bash
cd $HOME
snap install lz4
sudo systemctl stop emped
cp $HOME/.empe-chain/data/priv_validator_state.json $HOME/.empe-chain/priv_validator_state.json.backup
rm -rf $HOME/.empe-chain/data
curl -o - -L https://empe.snapshot-t.stavr.tech/emper-snap.tar.lz4 | lz4 -c -d - | tar -x -C $HOME/.empe-chain --strip-components 2
mv $HOME/.empe-chain/priv_validator_state.json.backup $HOME/.empe-chain/data/priv_validator_state.json
wget -O $HOME/.empe-chain/config/addrbook.json "https://raw.githubusercontent.com/111STAVR111/props/main/Empeiria/addrbook.json"
sudo systemctl restart emped && journalctl -fu emped -o cat
```

### Start

```bash
sudo systemctl daemon-reload
sudo systemctl enable emped
sudo systemctl restart emped && sudo journalctl -fu emped -o cat
```

#### Create validator

```python
emped tx staking create-validator \
  --amount 1000000uempe \
  --commission-max-change-rate "0.2" \
  --commission-max-rate "0.50" \
  --commission-rate "0.1" \
  --min-self-delegation "1" \
  --pubkey=$(emped tendermint show-validator) \
  --moniker 'STAVR_guide' \
  --website "" \
  --identity "" \
  --details "" \
  --chain-id empe-testnet-2 \
  --from Wallet_Name -y
```

## [🧩Services and Tools🧩](https://stavr-team.gitbook.io/nodes-guides/testnets/empeiria/statesync-snapshot)

## 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
sudo systemctl stop emped
sudo systemctl disable emped
rm /etc/systemd/system/emped.service
sudo systemctl daemon-reload
cd $HOME
rm -rf .empe-chain
rm -rf $(which emped)
```


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