npsapp

KevaChat Server for NPS Protocol

Listen connections on 1915 port and save messages to given namespace in KevaCoin blockchain

To read messages, use KevaChat webapp, geminiapp or any KevaCoin explorer!

Components

• kevachat/kevacoin-php - KevaCoin library for PHP 8
• cboden/ratchet - Asynchronous Socket server
• gregwar/captcha - Captcha library to prevent spam abuse
• ixnode/php-cli-image - Library converts captcha to ASCII format

Install

• git clone https://github.com/kevachat/npsapp.git
• cd npsapp
• composer update

Setup

• cd npsapp
• cp config/example.json config/name.json - edit connection and provide room namespace

Launch

• php src/app.php name.json - where name.json argument is any config, placed at config folder

Autostart

Launch server as the systemd service

You can create as many servers as wanted by providing separated config for each instance!

Following example require npsapp installed into the home directory of npsapp user (useradd -m npsapp)

1. sudo nano /etc/systemd/system/npsapp.service - create new service:

[Unit]
After=network.target

[Service]
Type=simple
User=npsapp
Group=npsapp
ExecStart=/usr/bin/php /home/npsapp/npsapp/src/app.php name.json
StandardOutput=file:/home/npsapp/debug.log
StandardError=file:/home/npsapp/error.log
Restart=on-failure

[Install]
WantedBy=multi-user.target

2. sudo systemctl daemon-reload - reload systemd configuration
3. sudo systemctl enable npsapp - enable npsapp service on system startup
4. sudo systemctl start npsapp - start npsapp server

Usage

• nc 127.0.0.1 1915 - IPv4 only
• ncat 127.0.0.1 1915 - IPv4/6, UTF-8 support
• telnet 127.0.0.1 1915 - IPv4/6, may cause issues with cyrillic messages