Integration of a payment button via MetaMask with CRPJ recalculation and payment in POL
It is necessary to implement a Web3 interface with a single "Buy CRPJ" button and two input fields, as shown in the attached screenshot:
— On the left: input field for the amount in USDT;
- On the right: automatic recalculation in CRPJ (at a rate of 1 CRPJ = 0.24 USDT);
- Payment will be made not in USDT, but in POL (Polygon Ecosystem Token);
After entering the amount, the user clicks the button, opens MetaMask, where they manually enter the amount of POL to transfer to the specified wallet.
- Display of the interface identical to the screenshot (horizontal placement of fields, button below them);
- USDT field — input, CRPJ field — reserved;
- The rate is hardcoded: 1 CRPJ = 0.24 USDT;
- Minimum: 1 USDT, maximum: 100000 USDT, step 0.01;
- Error statuses (for example: "Enter amount", "MetaMask not found", "Transaction canceled");
- MetaMask support on PC: browser extension, on websites and mobile devices (via built-in MetaMask browser or deep link);
- Notification if MetaMask is not installed;
- User confirms the transfer in POL manually in the wallet;
- No POL calculations in the code — only visual recalculation of CRPJ based on entered USDT.
- Integration and proper operation on the website crpjet.com, which is hosted on the platform Framer.com
Polygon address (POL): 0x19F652c687459a132DEBfdD9Dce80399A472c167
- Screenshot of the desired interface (attached);
- Examples of HTML/JS code that do not work correctly (Funds do not reach my wallet) — for reference and guidance;
— Color scheme: black background, border and button — blue (#0E32AA), white text.
🔹 CRPJ token code (if needed for visual display or smart logic):
https://docs.google.com/document/d/1gtfoLT7JRfd0yQlQDV7TGLRSyzE9Fd_OgA83YHajL-g/edit?usp=drive_link
🔹 Non-working JavaScript code (for reference):
https://docs.google.com/document/d/16lMiw_JzTLf2FUXZQruebBTXwMKGUxgGpNkFYYrnAsU/edit?usp=drive_link
Expected delivery within 1–3 working days.
Priority — stability, cross-platform compatibility, and security.
Budget: 75 USD Deadline: 1 day
Hello, I have extensive experience in developing web3 applications, write in private message, let's discuss
