feat: lnurl endpoint

todo: qrcode

__init__.py

@@ -8,12 +8,14 @@
 from .tasks import wait_for_paid_invoices
 from .views import pay2print_ext_generic
 from .views_api import pay2print_ext_api
+from .views_lnurl import pay2print_lnurl_router
 
 scheduled_tasks: list[asyncio.Task] = []
 
 pay2print_ext: APIRouter = APIRouter(prefix="/pay2print", tags=["pay2print"])
 pay2print_ext.include_router(pay2print_ext_generic)
 pay2print_ext.include_router(pay2print_ext_api)
+pay2print_ext.include_router(pay2print_lnurl_router)
 
 pay2print_static_files = [
     {
@@ -42,8 +44,8 @@ def pay2print_start():
 __all__ = [
     "db",
     "pay2print_ext",
-    "pay2print_static_files",
     "pay2print_start",
+    "pay2print_static_files",
     "pay2print_stop",
     "print_file",
 ]

static/js/index.js

@@ -68,6 +68,10 @@ window.app = Vue.createApp({
       printerDialog: {
         show: false,
         data: {}
+      },
+      qrDialog: {
+        show: false,
+        data: {}
       }
     }
   },
@@ -96,6 +100,12 @@ window.app = Vue.createApp({
       this.printerDialog.data = {...printer}
       this.printerDialog.show = true
     },
+    openLnurlQrCode(printer_id) {
+        // const printer = this.printers.find(printer => printer.id === printer_id)
+        const lnurl = `${window.location.origin}/pay2print/api/v1/lnurl/${printer_id}`
+        this.qrDialog.data = { lnurl: lnurl }
+        this.qrDialog.show = true
+    },
     openFile(payment_hash) {
       return `/pay2print/api/v1/file/${payment_hash}`
     },

templates/pay2print/index.html

@@ -2,6 +2,23 @@
 %} {% block scripts %} {{ window_vars(user) }}
 <script src="{{ static_url_for('pay2print/static', path='js/index.js') }}"></script>
 {% endblock %} {% block page %}
+<q-dialog v-model="qrDialog.show" position="top">
+  <q-card class="q-pa-lg q-pt-xl text-center lnbits__dialog-card">
+    <lnbits-qrcode :value="qrDialog.data.lnurl"></lnbits-qrcode>
+    <q-btn
+      unelevated
+      color="primary"
+      @click="copyText(qrDialog.data.lnurl)"
+      class="q-mt-md q-mr-sm"
+      >Copy LNURL</q-btn>
+    <q-btn
+      unelevated
+      color="primary"
+      @click="qrDialog.show = false"
+      class="q-mt-md"
+      >Close</q-btn>
+    </q-card>
+</q-dialog>
 <q-dialog v-model="printerDialog.show" position="top">
   <q-card class="q-pa-lg q-pt-xl lnbits__dialog-card">
     <q-form @submit="submitPrinterForm" class="q-gutter-md">
@@ -175,6 +192,16 @@ <h5 class="text-subtitle1 q-my-none">Printers</h5>
             >
               <q-tooltip>Public Text Page</q-tooltip>
             </q-btn>
+            <q-btn
+              flat
+              dense
+              size="xs"
+              icon="qr_code"
+              color="secondary"
+              @click="openLnurlQrCode(props.row.id)"
+            >
+              <q-tooltip>LNURL QRCode</q-tooltip>
+            </q-btn>
           </q-td>
           <q-td
             v-for="col in props.cols"

views_lnurl.py

@@ -0,0 +1,85 @@
+import json
+from http import HTTPStatus
+from typing import Union
+
+from fastapi import APIRouter, HTTPException, Query, Request
+from lnbits.core.services import create_invoice
+from lnbits.lnurl import LnurlErrorResponseHandler
+from lnurl import LnurlPayActionResponse, LnurlPayResponse
+from lnurl.models import MessageAction
+from lnurl.types import (
+    ClearnetUrl,
+    DebugUrl,
+    LightningInvoice,
+    LnurlPayMetadata,
+    Max144Str,
+    MilliSatoshi,
+    OnionUrl,
+)
+from pydantic import parse_obj_as
+
+from .crud import (
+    create_print,
+    get_printer,
+)
+
+pay2print_lnurl_router = APIRouter()
+pay2print_lnurl_router.route_class = LnurlErrorResponseHandler
+
+
+@pay2print_lnurl_router.get(
+    "/api/v1/lnurl/{printer_id}",
+    status_code=HTTPStatus.OK,
+    name="pay2print.api_lnurl_response",
+)
+async def api_lnurl_response(request: Request, printer_id: str) -> LnurlPayResponse:
+    printer = await get_printer(printer_id)
+    if not printer:
+        raise HTTPException(
+            status_code=HTTPStatus.NOT_FOUND, detail="Printer does not exist."
+        )
+    url = request.url_for("pay2print.api_lnurl_callback", printer_id=printer_id)
+    callback_url: Union[DebugUrl, OnionUrl, ClearnetUrl] = parse_obj_as(
+        Union[DebugUrl, OnionUrl, ClearnetUrl],  # type: ignore
+        str(url),
+    )
+    return LnurlPayResponse(
+        callback=callback_url,
+        minSendable=MilliSatoshi(printer.amount * 1000),
+        maxSendable=MilliSatoshi(printer.amount * 1000),
+        metadata=LnurlPayMetadata(
+            json.dumps([["text/plain", f"Pay to print {printer.name}"]])
+        ),
+    )
+
+
+@pay2print_lnurl_router.get(
+    "/api/v1/lnurl/cb/{printer_id}",
+    status_code=HTTPStatus.OK,
+    name="pay2print.api_lnurl_callback",
+)
+async def api_lnurl_callback(
+    printer_id: str,
+    amount: int = Query(...),
+) -> LnurlPayActionResponse:
+    printer = await get_printer(printer_id)
+    if not printer:
+        raise HTTPException(
+            status_code=HTTPStatus.NOT_FOUND, detail="Printer does not exist."
+        )
+    if amount != printer.amount:
+        raise HTTPException(
+            status_code=HTTPStatus.BAD_REQUEST,
+            detail=f"Amount must be {printer.amount}.",
+        )
+    payment = await create_invoice(
+        wallet_id=printer.wallet,
+        amount=printer.amount,
+        memo=f"Pay to print {printer.name}",
+        extra={"tag": "pay2print"},
+    )
+    await create_print(printer_id, payment.payment_hash, "lnurl.txt")
+    message = parse_obj_as(Max144Str, "Printing! Thank you")
+    action = MessageAction(message=message)
+    invoice = parse_obj_as(LightningInvoice, LightningInvoice(payment.bolt11))
+    return LnurlPayActionResponse(pr=invoice, successAction=action, routes=[])