Dailerc Tools Store (in progress)

Problem

We write many small, useful tools and want to offer them on dailerc.com: each tool on its own page, running right in the browser, free for basic use and paid for heavier use. Payment had to feel familiar to Vietnamese users, be confirmed automatically, and be impossible to fake from the browser.

Solution

Each tool gets an SEO-friendly page where the tool runs at the top, plus category and catalog pages. The first phase ships two built-in tools that run entirely in the browser: a JSON formatter and a QR code generator. A tool can also be an embedded external page. Every tool is free up to a daily limit, counted per anonymous visitor and IP, or per account once signed in; the day follows Vietnam time. Paid plans are a one-time unlock or a 30- or 365-day pass, for one tool or for all of them. Payment uses VietQR through SePay: the order code goes in the transfer content, the webhook is authenticated, the amount must match exactly, each transaction is processed only once, and access is granted inside one transaction. Admins can confirm or match payments by hand. Payments stay off until configured, so the store can launch with free tools first.

Results

The project is in progress. The detailed design is complete, covering the data model, API, payment flow, security and rollout plan. The first phase will launch with free tools; VietQR payments will be switched on after testing with real transactions.

Technologies