How to Pay Part of an Order with Your Wallet (Pro)

A wallet with $161 in it cannot pay for a $253 basket. Partial payment is how that $161 gets used anyway.

Step 1: Turn on partial payments

Go to DevDiggers Plugins → Wallet → Configuration → General, and tick Partial Payments under Checkout Settings.

The Partial Payments checkbox

Step 2: Open a checkout the balance cannot cover

The panel is deliberately quiet. It appears only when the customer has a balance and the order costs more than that balance, or more than Max Debit Limit.

The checkout payment options with the Wallet method absent

The Wallet payment method is gone from the list, because it cannot cover the order. That is the signal the panel is about to be needed.

Step 3: Open the panel

Wallet Partial Payment sits in the order summary, under Add coupons.

The Wallet Partial Payment panel in the checkout order summary

Clicking it opens the form: the available balance, an amount field and an Apply button.

The partial payment form with the balance and the amount field

The field arrives prefilled with the whole balance. For most customers the right move is to press Apply without touching it. Type a smaller figure to keep some back.

Step 4: Press Apply

The panel confirms the amount, and the order summary gains a Payment via Wallet line taking that amount off the total.

The order summary with the wallet amount applied and the total reduced

Two details worth noticing in that shot.

The line is not taxed. It is applied as a non-taxable adjustment, so the tax on the goods does not change when the wallet covers part of them.
The panel heading changes to say how much is in the wallet, with Currently Applied and a Remove link under it.

The Remove link on the applied partial payment panel

Remove puts the amount back and restores the total. Nothing has left the wallet yet.

Step 5: Pay the rest another way

Choose any other payment method for the remaining total and place the order.

The checkout payment options with the Wallet method absent

The Wallet method itself stays out of the list, because the order is already part-paid from that wallet.

The wallet is debited when the order is placed, with the reason Order Payment, exactly as a full wallet payment would be.

What can go wrong

The panel does not appear. Either the balance is zero, or the order is small enough for the balance to cover it, in which case the Wallet method is offered instead.
The Wallet method disappears after applying. That is expected. An order cannot be paid twice from the same wallet.
The applied amount survives into a top-up. Remove it before starting a top-up. A top-up cart gives no control to remove it with, and the top-up total lands at zero.