start_node.sh

#!/bin/bash

# ┌────────────────────────────────────────┐
# │ Developed by ladopixel x 2ndTLmining   │
# │ Execute Ergo node                      │
# └────────────────────────────────────────┘

get_latest_release() {
    latest_release=$(curl --silent "https://api.github.com/repos/ergoplatform/ergo/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')
}

get_latest_release

# Set the API key from the environment variable
my_key="${API_KEY}"

# I define some colors for the messages
texto_verde="\033[32m"
texto_rojo="\033[31m"
reset="\033[0m"

# ERGO
echo
echo " ███████"
echo " █"
echo "  █"
echo "   █"
echo "  █"
echo " █"
echo " ███████ ErgoPlatform.org"
echo
echo "$latest_release"
echo

# Check if Java is installed and version is at least 8
if type -p java >/dev/null; then
    java_version=$(java -version 2>&1 | awk -F'"' '/version/ {print $2}' | sed 's/\(.*\)\(.\_.*\)\(.\_.*\)/\1/g')
    echo "Java version: $java_version"
    if [[ "$java_version" =~ ^1\.[0-7].* ]]; then
        echo "Java version $java_version is too old. Please install Java 8 or higher."
        exit 1
    else
        echo "Java version $java_version meets the minimum requirement(Java 8 or higher), installation continues..."
    fi
else
    echo "Java is not installed. Please install Java 8 or higher."
    exit 1
fi

# I go to the user's home directory
cd || exit

# The first parameter ($1) is to indicate the name of the directory where everything will be installed,
# if you do not specify it, it will automatically create a directory in the user's home ergo_node.
if [ $# -gt 0 ]; then
    directory=$1
else
    directory="ergo_node"
fi

if [ ! -d "$directory" ]; then
    mkdir -v "$directory" > /dev/null
    echo -e "${texto_verde}[+] Ergo directory successfully created ${reset}"
else
    echo -e "${texto_rojo}[!] The directory already exists, impossible to create another one with the same name ${reset}"
fi

# I download the node version
url_ergo="https://github.com/ergoplatform/ergo/releases/download/$latest_release"
jar_file="ergo-${latest_release#v}.jar"
if [ ! -f "$HOME/$directory/$jar_file" ]; then
    curl -LJO "$url_ergo/$jar_file"
    mv "$HOME/$jar_file" "$HOME/$directory"
    echo -e "${texto_verde}[+] The node has been successfully downloaded ${reset}"
else
    echo -e "${texto_rojo}[!] You already have an available node ${reset}"
fi

# I create the initial ergo.conf file.
if [ ! -f "$HOME/$directory/ergo.conf" ]; then
    ergo_conf="ergo {"
    echo "$ergo_conf" > "$HOME/$directory/ergo.conf"
    ergo_conf="directory = \${ergo.directory}/$HOME/$directory"
    echo "$ergo_conf" >> "$HOME/$directory/ergo.conf"
    ergo_conf="node.extraIndex = true"
    echo "$ergo_conf" >> "$HOME/$directory/ergo.conf"
    ergo_conf="node.extraCacheSize = 500"
    echo "$ergo_conf" >> "$HOME/$directory/ergo.conf"
    ergo_conf="node.utxoBootstrap = true"
    echo "$ergo_conf" >> "$HOME/$directory/ergo.conf"
    ergo_conf="node.storingUtxoSnapshots = 2"
    echo "$ergo_conf" >> "$HOME/$directory/ergo.conf"
    ergo_conf="}"
    echo $ergo_conf >> "$HOME/$directory/ergo.conf"
    echo -e "${texto_verde}[+] Configuration file successfully created ${reset}"

    # I run the node for the first time
    cd "$HOME"/"$directory" || exit
    java -jar "$jar_file" --mainnet -c ergo.conf &

    # I store the pid of the node process running at background for the first time
    node_process_pid=$!
    echo -e "${texto_verde}[+] PID $node_process_pid ${reset}"

    # To initialize local node
    sleep 20

    # known public node http://213.239.193.208:9053/
    # local node http://localhost:9053/
    # Create my key haciendo uso de la API en mi nodo activo
    api_key=$(curl -X POST "http://localhost:9053/utils/hash/blake2b" -H "accept: application/json" -H "Content-Type: application/json" -d "\"$my_key\"")
    if [ $? -eq 0 ]; then # Check if the request was successful
        echo -e "${texto_verde}[+] API Response: Api key generated correctly ${reset}"
    else
        echo -e "${texto_rojo}[-] Error when querying the API. ${reset}"
    fi

    # Stop the node
    kill $node_process_pid
    echo -e "${texto_verde}[+] Node closed to restart with api_key ${reset}"

    # update ergo.conf with api_key
    echo_conf="scorex {"
    echo "$echo_conf" >> "$HOME/$directory/ergo.conf"
    echo_conf="restApi {"
    echo "$echo_conf" >> "$HOME/$directory/ergo.conf"
    echo_conf="apiKeyHash = $api_key"
    echo "$echo_conf" >> "$HOME/$directory/ergo.conf"
    echo_conf="}"
    echo $echo_conf >> "$HOME/$directory/ergo.conf"
    echo_conf="network {"
    echo "$echo_conf" >> "$HOME/$directory/ergo.conf"
    echo_conf="nodeName = \"ergo-at-bash\""
    echo "$echo_conf" >> "$HOME/$directory/ergo.conf"
    echo_conf="agentName = \"ergo-at-bash\""
    echo "$echo_conf" >> "$HOME/$directory/ergo.conf"
    echo_conf="maxConnections = 12"
    echo "$echo_conf" >> "$HOME/$directory/ergo.conf"
    echo_conf="}"
    echo "$echo_conf" >> "$HOME/$directory/ergo.conf"
    echo_conf="}"
    echo "$echo_conf" >> "$HOME/$directory/ergo.conf"
fi

# I start the node with the correctly configured configuration file.
cd "$HOME/$directory" || exit
echo -e "${texto_verde}[+] Restarting node ${reset}"
java -jar "$jar_file" --mainnet -c ergo.conf