Merge pull request #10575 from f321x/lnurlw_prefix

pi: handle lud-17 lnurl URIs

electrum/gui/qml/qeapp.py

@@ -23,6 +23,7 @@ from electrum.network import Network
 from electrum.plugin import run_hook
 from electrum.gui.common_qt.util import get_font_id
 from electrum.util import profiler
+from electrum.lnurl import SUPPORTED_LNURL_SCHEMES
 
 from .qeconfig import QEConfig
 from .qedaemon import QEDaemon
@@ -235,7 +236,9 @@ class QEAppController(BaseCrashReporter, QObject):
         data = str(intent.getDataString())
         self.logger.debug(f'received intent: {repr(data)}')
         scheme = str(intent.getScheme()).lower()
-        if scheme == BITCOIN_BIP21_URI_SCHEME or scheme == LIGHTNING_URI_SCHEME:
+        if scheme == BITCOIN_BIP21_URI_SCHEME \
+                or scheme == LIGHTNING_URI_SCHEME \
+                or scheme in SUPPORTED_LNURL_SCHEMES:
             self.uriReceived.emit(data)
 
     def startup_finished(self):

electrum/lnurl.py

@@ -21,6 +21,9 @@ from electrum.i18n import _
 _logger = get_logger(__name__)
 
 
+SUPPORTED_LNURL_SCHEMES = ('lnurlp', 'lnurlw')
+
+
 class LNURLError(Exception): pass
 
 class UntrustedLNURLError(LNURLError):

electrum/payment_identifier.py

@@ -16,7 +16,7 @@ from .util import get_asyncio_loop, log_exceptions
 from .transaction import PartialTxOutput
 from .lnurl import (decode_lnurl, request_lnurl, callback_lnurl, LNURLError,
                     lightning_address_to_url, try_resolve_lnurlpay, LNURL6Data,
-                    LNURL3Data, LNURLData)
+                    LNURL3Data, LNURLData, SUPPORTED_LNURL_SCHEMES)
 from .bitcoin import opcodes, construct_script
 from .lnaddr import LnInvoiceException
 from .lnutil import IncompatibleOrInsaneFeatures
@@ -45,9 +45,25 @@ def remove_uri_prefix(data: str, *, prefix: str) -> str:
     return data
 
 
+def maybe_extract_url_from_lud_17_uri(data: str) -> Optional[str]:
+    """https://github.com/lnurl/luds/blob/luds/17.md"""
+    data = data.strip()
+    try:
+        parsed = urllib.parse.urlsplit(data)
+    except ValueError:
+        return None
+    if parsed.scheme not in SUPPORTED_LNURL_SCHEMES:
+        return None
+    if not (host := parsed.hostname) or not parsed.path:
+        return None
+    is_onion = host.endswith('.onion')
+    url_scheme = 'http' if is_onion else 'https'
+    return urllib.parse.urlunsplit(parsed._replace(scheme=url_scheme))
+
+
 RE_ALIAS = r'(.*?)\s*\<([0-9A-Za-z]{1,})\>'
-RE_EMAIL = r'\b[A-Za-z0-9._%+-]+@([A-Za-z0-9-]+\.)+[A-Z|a-z]{2,7}\b'
-RE_DOMAIN = r'\b([A-Za-z0-9-]+\.)+[A-Z|a-z]{2,7}\b'
+RE_EMAIL = r'\b[A-Za-z0-9._%+-]+@([A-Za-z0-9-]+\.)+[A-Za-z]{2,7}\b'
+RE_DOMAIN = r'\b([A-Za-z0-9-]+\.)+[A-Za-z]{2,7}\b'
 RE_SCRIPT_FN = r'script\((.*)\)'
 
 
@@ -98,6 +114,7 @@ class PaymentIdentifier(Logger):
         * openalias
         * bip21 URI
         * lightning-URI (containing bolt11 or lnurl)
+        * lnurl-URI (lud17 lnurlw/lnurlp URI)
         * bolt11 invoice
         * lnurl
         * lightning address
@@ -228,6 +245,10 @@ class PaymentIdentifier(Logger):
                     self.logger.debug(f'Exception cause {e.args!r}')
                     return
                 self.set_state(PaymentIdentifierState.AVAILABLE)
+        elif lnurl_url := maybe_extract_url_from_lud_17_uri(text):
+            self._type = PaymentIdentifierType.LNURL
+            self.lnurl = lnurl_url
+            self.set_state(PaymentIdentifierState.NEED_RESOLVE)
         elif text.lower().startswith(BITCOIN_BIP21_URI_SCHEME + ':'):
             try:
                 out = parse_bip21_URI(text)