Implementation guide

Sell a digital download with BNB Chain USDT

A lightweight crypto checkout can work without holding buyer funds or asking for private keys. The core pattern is simple: create a unique exact payment amount for each order, watch confirmed USDT transfers to your wallet, then unlock the download only for the matching paid order.

The flow

• Create a pending order with a unique amount such as 10.000001 USDT.
• Show the buyer the BNB Smart Chain network, USDT contract, seller address, and exact amount.
• Scan token transfer logs or verify a pasted transaction hash.
• Require enough confirmations before marking the order paid.
• Prevent the same transaction hash from paying more than one order.
• Serve the product file only through a paid-order download token.

What makes it hard

The difficult parts are operational rather than cosmetic: reliable RPC access, persistent order storage, backups, expired orders, buyer mistakes on the wrong chain, and clear refund/support terms. A checkout page alone does not solve those obligations.

Starter kit

The $10 kit behind this site includes the Node.js checkout service, standalone listener, receipt verification, tests, deployment examples, and a production checklist. It is starter code, not a managed processor.

View the checkout starter Generate payment link Generate config Buy with USDT