Browse Source
* bundles all payment identifiers into handle_payment_identifier * adds lnurl decoding * adds lightning address decodingmaster
bitromortac
4 years ago
committed by
SomberNight
9 changed files with 221 additions and 39 deletions
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"""Module for lnurl-related functionality.""" |
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# https://github.com/sipa/bech32/tree/master/ref/python |
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# https://github.com/lnbits/lnurl |
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import asyncio |
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import json |
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from typing import Callable, Optional |
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import re |
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import aiohttp.client_exceptions |
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from aiohttp import ClientResponse |
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from electrum.segwit_addr import bech32_decode, Encoding, convertbits |
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from electrum.lnaddr import LnDecodeException |
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class LNURLError(Exception): |
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pass |
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def decode_lnurl(lnurl: str) -> str: |
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"""Converts bech32 encoded lnurl to url.""" |
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decoded_bech32 = bech32_decode( |
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lnurl, ignore_long_length=True |
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) |
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hrp = decoded_bech32.hrp |
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data = decoded_bech32.data |
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if decoded_bech32.encoding is None: |
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raise LnDecodeException("Bad bech32 checksum") |
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if decoded_bech32.encoding != Encoding.BECH32: |
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raise LnDecodeException("Bad bech32 encoding: must be using vanilla BECH32") |
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if not hrp.startswith("lnurl"): |
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raise LnDecodeException("Does not start with lnurl") |
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data = convertbits(data, 5, 8, False) |
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url = bytes(data).decode("utf-8") |
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return url |
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def request_lnurl(url: str, request_over_proxy: Callable) -> dict: |
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"""Requests payment data from a lnurl.""" |
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try: |
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response = request_over_proxy("get", url, timeout=2) |
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except asyncio.TimeoutError as e: |
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raise LNURLError("Server did not reply in time.") from e |
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except aiohttp.client_exceptions.ClientError as e: |
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raise LNURLError(f"Client error: {e}") from e |
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# TODO: handling of specific client errors |
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response = json.loads(response) |
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if "metadata" in response: |
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response["metadata"] = json.loads(response["metadata"]) |
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status = response.get("status") |
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if status and status == "ERROR": |
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raise LNURLError(f"LNURL request encountered an error: {response['reason']}") |
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return response |
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def callback_lnurl(url: str, params: dict, request_over_proxy: Callable) -> dict: |
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"""Requests an invoice from a lnurl supporting server.""" |
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try: |
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response = request_over_proxy("get", url, params=params) |
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except aiohttp.client_exceptions.ClientError as e: |
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raise LNURLError(f"Client error: {e}") from e |
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# TODO: handling of specific errors |
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response = json.loads(response) |
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status = response.get("status") |
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if status and status == "ERROR": |
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raise LNURLError(f"LNURL request encountered an error: {response['reason']}") |
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return response |
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def lightning_address_to_url(address: str) -> Optional[str]: |
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"""Converts an email-type lightning address to a decoded lnurl.""" |
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if re.match(r"[^@]+@[^@]+\.[^@]+", address): |
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username, domain = address.split("@") |
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return f"https://{domain}/.well-known/lnurlp/{username}" |
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@ -0,0 +1,12 @@
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from unittest import TestCase |
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from electrum import lnurl |
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class TestLnurl(TestCase): |
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def test_decode(self): |
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LNURL = ( |
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"LNURL1DP68GURN8GHJ7UM9WFMXJCM99E5K7TELWY7NXENRXVMRGDTZXSENJCM98PJNWXQ96S9" |
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) |
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url = lnurl.decode_lnurl(LNURL) |
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self.assertTrue("https://service.io/?q=3fc3645b439ce8e7", url) |
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