How to Build a Member Top-up Plugin with Dedicated Addresses
Many membership systems want the same experience: a user receives a long-term deposit address after signup, then can top up at any time and with any amount.
If the product still relies on a fixed-amount checkout order for every top-up, the experience becomes fragile. Users may pay after expiry, support teams must handle more supplements, and recharge records become harder to explain.
Why member top-up is different
- Users may deposit at any time, not only during a short checkout window
- Users often make multiple deposits or deposit non-fixed amounts
- The business cares about account balance crediting, not only one order status
- Operations teams prefer member-level recharge history
Dedicated address binding
After a member opens the top-up feature, bind a dedicated address to that member ID, site UID, or business identifier.
When that address receives funds later, the system recognizes the asset, amount, and transaction hash, creates a recharge record, and sends a callback to credit the member balance.
What the plugin should handle
- Bind an address once instead of allocating a new one every time
- Store member-to-address mappings by network and asset
- Make callback handling idempotent to avoid double crediting
- Keep exception handling for wrong chain, wrong asset, underpayment, and overpayment
This model is usually better for member recharge because it behaves like a permanent deposit account rather than a temporary payment order.