Fix · Payments

The amount charged is wrong (decimals, discounts, rounding)

Blocks your workKuwait and Gulf

What you may see

The gateway shows 10 instead of 10.000 or 0.010
The amount shown at KNET is different from my cart total
The total differs from the cart by a small amount

Most likely cause

The Kuwaiti dinar has three decimals, and code that assumes two decimals, whole units, or floating-point maths changes the amount.

Check first (about two minutes)

Write down three examples: cart total, amount sent to the gateway, amount shown by the gateway.

The fix prompt

What you type here never leaves your browser. The search runs on this page, and nothing is sent to a server or to an AI.

The exact error or what you see

What you did before it happened

Kept only in this browser, on this device. Keys and passwords are removed before anything is saved.

Prompt language

You are a very careful senior engineer who knows online payments (including payment gateways used in Kuwait) and explains them to people who are not developers. I am not a developer, so explain every step in plain words and tell me exactly which button, menu or command you mean. If you are not sure about something, say so; do not guess.

I am in Kuwait. If the service has a Kuwait or Gulf rule or option that matters here (for example KNET, Arabic right-to-left text or local time), take it into account.

THE PROBLEM
The amount charged is wrong (decimals, discounts, rounding)

THE EXACT ERROR OR WHAT I SEE
[paste the exact error here]

WHAT I DID BEFORE IT HAPPENED
[write in a few words what you did before it happened]

MOST LIKELY CAUSE
The Kuwaiti dinar has three decimals, and code that assumes two decimals, whole units, or floating-point maths changes the amount.

DO THESE STEPS, IN THIS ORDER
1. Find every place that computes or formats money (cart, discount, delivery, tax, gateway request).
2. Keep money as whole smallest units (fils) in code and the database, never as floating-point numbers, and convert once at the edge to the format the gateway wants (read its documentation for the exact format).
3. Compute the total on the SERVER from product ids and quantities, and compare it to what the gateway reports at the end.
4. Add tests: 0.001, 1.005, 12.500, 99.999, discounts, and quantities.
Stop and tell me if what you see does not match a step. Do not skip ahead.

CHECK THAT IT WORKED
- The amount in the cart, the order, the gateway and the receipt are identical to the fils.
Tell me exactly what I should see on the screen when it works.

DO NOT CHANGE
- Do not change prices in the catalogue.
- Anything I did not ask about: the design, the text, other pages, other settings or the data.
- Do not delete files, data or branches, do not reset or force-push, and do not rewrite history, unless you first show me exactly what would be lost and I say yes.
- Do not paste, print or ask me to paste a password or secret key into this chat. If one is needed, tell me which settings page of the right service to store it in.

WHEN YOU FINISH
Explain in simple words what you changed (file by file or setting by setting), why you changed it, and how I can undo it.

Paste it into Claude, ChatGPT, Gemini or Cursor, then follow what it says.

After you tried it, did it work?

Steps

Find every place that computes or formats money (cart, discount, delivery, tax, gateway request).
Keep money as whole smallest units (fils) in code and the database, never as floating-point numbers, and convert once at the edge to the format the gateway wants (read its documentation for the exact format).
Compute the total on the SERVER from product ids and quantities, and compare it to what the gateway reports at the end.
Add tests: 0.001, 1.005, 12.500, 99.999, discounts, and quantities.

Do not do this

Do not use the browser's total as the amount to charge.
Do not change prices in the catalogue.

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