Before going live, verify the system works end-to-end.
Create a test (small amount) transaction
Confirm that the address and QR code render properly
Send a valid crypto transaction.
Confirm that Cryptomus sends a callback and the order updates in WooCommerce.
Test on multiple networks or coins you enabled.
Test timeouts / expired payments (i.e., send after expiry).
Confirm order status transitions (paid, completed, failed).
Review logs for any errors during callback or API calls.