How to create RPC,API, and Json-RPC

You must have domain for this step and settup a dns records on cloudflare.com the dns records should be like this

Install depedencies and settup nginx

Connect to your Crossfi Node and following commands to install Nginx

sudo apt -q update
sudo apt -qy install curl git jq lz4 build-essential snapd unzip nginx
sudo apt -qy upgrade

API

Creating Your NGINX Configuration File

sudo nano /etc/nginx/sites-available/crossfi-testnet-api

Configuration nginx for your API subdomain

server {
    listen 80;
    server_name crossfi-testnet-api.nodevism.com;

    location / {
        add_header Access-Control-Allow-Origin *;
        add_header Access-Control-Max-Age 3600;
        add_header Access-Control-Expose-Headers Content-Length;
        
        proxy_pass http://127.0.0.1:1317;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

change nodevism.com on server_name with your own domain and change port on proxy_pass with your node port configuration you can find on app.toml file

RPC

Create your nginx configuration

sudo nano /etc/nginx/sites-available/crossfi-testnet-rpc

Configur your nginx for subdomain RPC

server {
    listen 80;
    server_name crossfi-testnet-rpc.nodevism.com;
    
    location / {
        proxy_pass http://127.0.0.1:26657;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

remember to change server_name nodevism.com with your domain and proxy_pass with your node port you can find on client.toml file

Json-RPC

create you nginx config file

sudo nano /etc/nginx/sites-available/crossfi-testnet-jsonrpc

configure nginx for your json-rpc subdomain

server {
    listen 80;
    server_name crossfi-testnet-jsonrpc.nodevism.com;
    
    location / {
        proxy_pass http://127.0.0.1:8545;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

remember to change server_name nodevism.com with your domain and proxy_pass with your node port you can find on app.toml file

Activate your configuration

sudo ln -s /etc/nginx/sites-available/crossfi-testnet-* /etc/nginx/sites-enabled/

This command creates a symbolic link between the sites-available and sites-enabled directories, effectively enabling your configuration.

Finall step, test the NGINX configuration for syntax errors:

sudo nginx -t

If the test passes without issues, reload NGINX to apply the changes

sudo systemctl reload nginx

Your subdomains should now be set up and accessible via the specified subdomain addresses

all your endpoints are still using unsecure HTTP. In the next section, we'll install SSL for all our endpoints.

Install certbot

I use CertBot as our SSL manager. Install it using the following commands

sudo snap install --classic certbot
sudo ln -s /snap/bin/certbot /usr/bin/certbot
sudo snap set certbot trust-plugin-with-root=ok

SSL configuration

sudo certbot --nginx --register-unsafely-without-email

If everything is done correctly, your API and RPC links should now be working as follows: https://crossfi-testnet-api.nodevism.com https://crossfi-testnet-rpc.nodevism.com