Add NFC Payment Support and Display Receive Amount in Receive Dialog (#2747)

* feat: add readNfcTag to core wallet

* feat: added payments/ endpoint to pay invoice with lnurlw from nfc tag

* feat: add notifications to nfc read and payment process

* feat: display sat and fiat amount on receive invoice

* feat: add notifications for non-lnurl nfc tags

* removed unnecesary payment updates

* fix: case when lnurlw was already used. lnurl_req status error

* fix: lnurl response status error

* fix: abort nfc reading on receive dialog hid

* feat: dismiss tap suggestion when nfc tag read successfully

* update: NFC supported chip

* remove console.log

* add: function return type

* test: happy path for api_payment_pay_with_nfc

* feat: follow LUD-17, no support for lightning: url schema

* explicit lnurl withdraw for payment

* test: add parametrized tests for all cases of api_payment_pay_with_nfc endpoint

* fix: payment.amount in response comes already in milisats

lnbits/core/views/payment_api.py

@@ -25,6 +25,7 @@ from lnbits.core.models import (
     CreateLnurl,
     DecodePayment,
     KeyType,
+    PayLnurlWData,
     Payment,
     PaymentFilters,
     PaymentHistoryPoint,
@@ -406,3 +407,59 @@ async def api_payments_decode(data: DecodePayment) -> JSONResponse:
             {"message": f"Failed to decode: {exc!s}"},
             status_code=HTTPStatus.BAD_REQUEST,
         )
+
+
+@payment_router.post("/{payment_request}/pay-with-nfc", status_code=HTTPStatus.OK)
+async def api_payment_pay_with_nfc(
+    payment_request: str,
+    lnurl_data: PayLnurlWData,
+) -> JSONResponse:
+
+    lnurl = lnurl_data.lnurl_w.lower()
+
+    # Follow LUD-17 -> https://github.com/lnurl/luds/blob/luds/17.md
+    url = lnurl.replace("lnurlw://", "https://")
+
+    headers = {"User-Agent": settings.user_agent}
+    async with httpx.AsyncClient(headers=headers, follow_redirects=True) as client:
+        try:
+            lnurl_req = await client.get(url, timeout=10)
+            if lnurl_req.is_error:
+                return JSONResponse(
+                    {"success": False, "detail": "Error loading LNURL request"}
+                )
+
+            lnurl_res = lnurl_req.json()
+
+            if lnurl_res.get("status") == "ERROR":
+                return JSONResponse({"success": False, "detail": lnurl_res["reason"]})
+
+            if lnurl_res.get("tag") != "withdrawRequest":
+                return JSONResponse(
+                    {"success": False, "detail": "Invalid LNURL-withdraw"}
+                )
+
+            callback_url = lnurl_res["callback"]
+            k1 = lnurl_res["k1"]
+
+            callback_req = await client.get(
+                callback_url,
+                params={"k1": k1, "pr": payment_request},
+                timeout=10,
+            )
+            if callback_req.is_error:
+                return JSONResponse(
+                    {"success": False, "detail": "Error loading callback request"}
+                )
+
+            callback_res = callback_req.json()
+
+            if callback_res.get("status") == "ERROR":
+                return JSONResponse(
+                    {"success": False, "detail": callback_res["reason"]}
+                )
+            else:
+                return JSONResponse({"success": True, "detail": callback_res})
+
+        except Exception as e:
+            return JSONResponse({"success": False, "detail": f"Unexpected error: {e}"})