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2025

  • in SQL
  • 1 min read

MS SQL Installation

Just a note to self, that when installing the developer edition of MS SQL, TCP is not enabled, by default, so you cannot connect to the instance via the port, 1433, until you open Sql Server Configuration Manager, find SQL Server Network Configuration and enable TCP/IP. You can now connect.

  • in Linux
  • 1 min read

Sudo Two-Factor Authentication

This can be done using PAM (Pluggable Authentication Modules).

Install libpam-google-authenticator.

sudo apt update
sudo apt install libpam-google-authenticator

Set up Google Authenticator

google-authenticator
  • yes to time based tokens.
  • Scan the QR code with your prefered authenticator app.
  • Save the emergency backup codes in a secure place.

Edit the PAM configuration for sudo.

sudo nano /etc/pam.d/sudo

Add the following line at the top (before any other auth lines)

auth required pam_google_authenticator.so

Test the setup

sudo ls
  • in Stripe
  • 2 min read

Stripe Fireship Demo

Pricing Options

  • Freemium
  • Free Trial
  • One-Time Payment
  • Tiered Subscriptions
  • Seat-Based Pricing (charge per user)
  • Metered Billing

Freemium

Free tier + Premium

Some features are free, but you need to purchase to use the full premium experience.

Tiered

Based on things like number of users, or limited number of items etc.

  • Beginner
  • Professional
  • Enterprise

Metered

Tokens, credits.

Charge based on usage, i.e. AWS.

Creating a hono app

npm create hono@latest stripe-hono

You can then chose from different tempate options like aws-lambda, cloudflare-workers, node.js, next.js.

To run the project run

npm run dev

Installing Stripe

To install stripe sdk

npm install stripe

Also install dotenv to use an env file

npm install dotenv

Using Checkout

Create a post request that will use the stripe sdk and pass the price id of the product you created

app.post('/checkout', async (c) => {


  try {
    const session = await stripe.checkout.sessions.create({
      payment_method_types: ['card'],
      line_items: [
        {
          price: 'price_', // get this from the product you created in stripe
          quantity: 1,
        },
      ],
      mode: 'payment',
      success_url: 'http://localhost:3000/success',
      cancel_url: 'http://localhost:3000/cancel',
    });

    return c.json(session);
  } catch (error: any) {
    console.error(error);
    throw new HTTPException(500, { message: error?.message });
  }
});

You can then see that actual payment in the transactions menu.

Webhooks

This is when stripe communicates with your server.

Events include

  • completed
  • expired
  • canceled
  • created
  • delayed
  • subscription updated
  • subscription deleted

In order to test web hook calls from Stripe, we need to install the Stripe CLI.

stripe login

stripe listen -e checkout.session.completed --forward-to http://localhost:3000/webhook 

stripe listen -e checkout.session.completed --forward-to http://localhost:9095/api/webhook

stripe listen -e customer.subscription.updated --forward-to http://localhost:9095/api/webhook

Creating a next.js app

npx create-next-app app-name

# optional styling libraries
npm i -D @tailwindcss/typography daisyui

# install Stripe
npm i stripe @stripe/stripe-js

# serve the site
npm run dev

stripe is used on the backend, stripe-js is used on the front end. Both will be used in next.js.

When using the next application, use the following command to forward webhooks to it.

stripe listen -e customer.subscription.updated,customer.subscription.deleted,checkout.session.completed --forward-to http://localhost:3000/api/webhook

Minimum data to store in the database for a user

  • user_id
  • stripe_customer_id
  • subscription_id
  • plan_active
  • plan_expires

Fireship io uses "send grid" to send an email when a payment goes through.