tu-dominio.cl

A client wanted to sell several domains online and needed a site with a catalog and integrated payment, instead of handling each sale by hand.

A solo commission: tu-dominio.cl, a site to sell domains. I built it solo, end to end.

Solve the full commercial flow, from picking a domain to the payment result and its state change.

• Built everything: frontend, backend and database.
• Integrated Mercado Pago with Checkout Pro and a webhook that confirms the payment.
• Modeled the data with Prisma on PostgreSQL hosted on Supabase.

• Next.js owns frontend and backend; Prisma talks to PostgreSQL on Supabase; Mercado Pago runs checkout.
• The webhook does not trust the notification: it queries the payment in Mercado Pago again before recording the order.
• An approved payment creates the order and marks the domain as sold; the order stays pending data until the buyer completes the information for the transfer.

• Domain catalog with search, category filters and availability.
• Checkout with Mercado Pago and result pages for approved, pending or failed payments.
• When the payment is approved, the domain goes from available to sold and the order is created.
• A post-payment form for the owner's data, needed to transfer the domain through NIC Chile.

• Keeping the external payment and local state consistent across approved, failed or incomplete results.
• Avoiding duplicate orders when Mercado Pago repeats a notification: the payment id is unique in the database.
• Closing the technical product even though its release depended on third-party information.

• Integrating a payment gateway and reacting to its result to move the order state.
• Leaving a finished, functional product even when closing it out depends on third parties.