330 lines
12 KiB
Python
330 lines
12 KiB
Python
import asyncio
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import json
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from collections.abc import AsyncGenerator
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from secrets import token_urlsafe
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import httpx
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from bolt11 import Bolt11Exception
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from bolt11.decode import decode
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from loguru import logger
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from lnbits.exceptions import UnsupportedError
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from lnbits.helpers import normalize_endpoint
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from lnbits.settings import settings
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from lnbits.utils.crypto import random_secret_and_hash
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from .base import (
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InvoiceResponse,
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PaymentPendingStatus,
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PaymentResponse,
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PaymentStatus,
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StatusResponse,
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Wallet,
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)
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from .macaroon import load_macaroon
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class CoreLightningRestWallet(Wallet):
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def __init__(self):
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if not settings.corelightning_rest_url:
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raise ValueError(
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"cannot initialize CoreLightningRestWallet: "
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"missing corelightning_rest_url"
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)
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if not settings.corelightning_rest_macaroon:
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raise ValueError(
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"cannot initialize CoreLightningRestWallet: "
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"missing corelightning_rest_macaroon"
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)
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macaroon = load_macaroon(settings.corelightning_rest_macaroon)
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if not macaroon:
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raise ValueError(
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"cannot initialize CoreLightningRestWallet: "
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"invalid corelightning_rest_macaroon provided"
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)
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self.url = normalize_endpoint(settings.corelightning_rest_url)
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headers = {
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"macaroon": macaroon,
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"encodingtype": "hex",
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"accept": "application/json",
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"User-Agent": settings.user_agent,
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}
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# https://docs.corelightning.org/reference/lightning-pay
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# -32602: Invalid bolt11: Prefix bc is not for regtest
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# -1: Catchall nonspecific error.
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# 201: Already paid
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# 203: Permanent failure at destination.
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# 205: Unable to find a route.
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# 206: Route too expensive.
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# 207: Invoice expired.
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# 210: Payment timed out without a payment in progress.
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self.pay_failure_error_codes = [-32602, 201, 203, 205, 206, 207, 210]
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self.cert = settings.corelightning_rest_cert or False
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self.client = httpx.AsyncClient(verify=self.cert, headers=headers)
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self.last_pay_index = 0
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self.statuses = {
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"paid": True,
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"complete": True,
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"failed": False,
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"pending": None,
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}
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async def cleanup(self):
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try:
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await self.client.aclose()
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except RuntimeError as e:
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logger.warning(f"Error closing wallet connection: {e}")
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async def status(self) -> StatusResponse:
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try:
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r = await self.client.get(
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f"{self.url}/v1/channel/localremotebal", timeout=5
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)
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r.raise_for_status()
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data = r.json()
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if len(data) == 0:
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return StatusResponse("no data", 0)
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if "error" in data:
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return StatusResponse(f"""Server error: '{data["error"]}'""", 0)
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if r.is_error or "localBalance" not in data:
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return StatusResponse(f"Server error: '{r.text}'", 0)
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return StatusResponse(None, int(data.get("localBalance") * 1000))
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except json.JSONDecodeError:
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return StatusResponse("Server error: 'invalid json response'", 0)
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except Exception as exc:
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logger.warning(exc)
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return StatusResponse(f"Unable to connect to {self.url}.", 0)
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async def create_invoice(
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self,
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amount: int,
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memo: str | None = None,
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description_hash: bytes | None = None,
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unhashed_description: bytes | None = None,
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**kwargs,
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) -> InvoiceResponse:
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label = kwargs.get("label", f"lbl{token_urlsafe(16)}")
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data: dict = {
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"amount": amount * 1000,
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"description": memo,
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"label": label,
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}
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if description_hash and not unhashed_description:
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raise UnsupportedError(
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"'description_hash' unsupported by CoreLightningRest, "
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"provide 'unhashed_description'"
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)
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if unhashed_description:
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data["description"] = unhashed_description.decode("utf-8")
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if kwargs.get("expiry"):
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data["expiry"] = kwargs["expiry"]
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preimage, _ = random_secret_and_hash()
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# https://github.com/Ride-The-Lightning/c-lightning-REST/blob/master/controllers/invoice.js#L52C17-L52C25
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data["preimage"] = preimage
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try:
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r = await self.client.post(
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f"{self.url}/v1/invoice/genInvoice",
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data=data,
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)
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r.raise_for_status()
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data = r.json()
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if len(data) == 0:
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return InvoiceResponse(ok=False, error_message="no data")
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if "error" in data:
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return InvoiceResponse(
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ok=False, error_message=f"""Server error: '{data["error"]}'"""
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)
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if r.is_error:
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return InvoiceResponse(
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ok=False, error_message=f"Server error: '{r.text}'"
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)
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if "payment_hash" not in data or "bolt11" not in data:
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return InvoiceResponse(
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ok=False, error_message="Server error: 'missing required fields'"
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)
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return InvoiceResponse(
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ok=True,
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checking_id=data["payment_hash"],
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payment_request=data["bolt11"],
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preimage=preimage,
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)
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except json.JSONDecodeError:
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return InvoiceResponse(
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ok=False, error_message="Server error: 'invalid json response'"
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)
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except Exception as exc:
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logger.warning(exc)
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return InvoiceResponse(
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ok=False, error_message=f"Unable to connect to {self.url}."
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)
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async def pay_invoice(self, bolt11: str, fee_limit_msat: int) -> PaymentResponse:
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try:
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invoice = decode(bolt11)
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except Bolt11Exception as exc:
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return PaymentResponse(ok=False, error_message=str(exc))
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if not invoice.amount_msat or invoice.amount_msat <= 0:
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error_message = "0 amount invoices are not allowed"
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return PaymentResponse(ok=False, error_message=error_message)
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try:
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r = await self.client.post(
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f"{self.url}/v1/pay",
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data={
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"invoice": bolt11,
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"maxfee": fee_limit_msat,
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},
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timeout=None,
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)
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r.raise_for_status()
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data = r.json()
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status = self.statuses.get(data["status"])
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if "payment_preimage" not in data:
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return PaymentResponse(
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ok=status, error_message=data.get("error") or "unknown error"
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)
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checking_id = data["payment_hash"]
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preimage = data["payment_preimage"]
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fee_msat = data["msatoshi_sent"] - data["msatoshi"]
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return PaymentResponse(
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ok=status, checking_id=checking_id, fee_msat=fee_msat, preimage=preimage
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)
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except httpx.HTTPStatusError as exc:
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try:
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logger.debug(exc)
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data = exc.response.json()
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error_code = int(data["error"]["code"])
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if error_code in self.pay_failure_error_codes:
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error_message = data["error"]["message"]
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return PaymentResponse(ok=False, error_message=error_message)
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error_message = f"REST failed with {data['error']['message']}."
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return PaymentResponse(error_message=error_message)
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except Exception as exc:
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error_message = f"Unable to connect to {self.url}."
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return PaymentResponse(error_message=error_message)
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except json.JSONDecodeError:
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return PaymentResponse(
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error_message="Server error: 'invalid json response'"
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)
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except KeyError as exc:
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logger.warning(exc)
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return PaymentResponse(
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error_message="Server error: 'missing required fields'"
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)
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except Exception as exc:
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logger.info(f"Failed to pay invoice {bolt11}")
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logger.warning(exc)
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return PaymentResponse(error_message=f"Unable to connect to {self.url}.")
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async def get_invoice_status(self, checking_id: str) -> PaymentStatus:
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r = await self.client.get(
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f"{self.url}/v1/invoice/listInvoices",
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params={"payment_hash": checking_id},
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)
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try:
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r.raise_for_status()
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data = r.json()
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if r.is_error or "error" in data or data.get("invoices") is None:
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raise Exception("error in cln response")
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return PaymentStatus(self.statuses.get(data["invoices"][0]["status"]))
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except Exception as e:
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logger.error(f"Error getting invoice status: {e}")
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return PaymentPendingStatus()
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async def get_payment_status(self, checking_id: str) -> PaymentStatus:
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r = await self.client.get(
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f"{self.url}/v1/pay/listPays",
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params={"payment_hash": checking_id},
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)
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try:
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r.raise_for_status()
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data = r.json()
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if r.is_error or "error" in data or not data.get("pays"):
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raise Exception("error in corelightning-rest response")
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pay = data["pays"][0]
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fee_msat, preimage = None, None
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if self.statuses[pay["status"]]:
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# cut off "msat" and convert to int
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fee_msat = -int(pay["amount_sent_msat"][:-4]) - int(
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pay["amount_msat"][:-4]
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)
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preimage = pay["preimage"]
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return PaymentStatus(self.statuses.get(pay["status"]), fee_msat, preimage)
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except Exception as e:
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logger.error(f"Error getting payment status: {e}")
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return PaymentPendingStatus()
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async def paid_invoices_stream(self) -> AsyncGenerator[str, None]:
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while settings.lnbits_running:
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try:
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url = f"{self.url}/v1/invoice/waitAnyInvoice/{self.last_pay_index}"
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async with self.client.stream("GET", url, timeout=None) as r:
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async for line in r.aiter_lines():
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inv = json.loads(line)
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if "error" in inv and "message" in inv["error"]:
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logger.error("Error in paid_invoices_stream:", inv)
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raise Exception(inv["error"]["message"])
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try:
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paid = inv["status"] == "paid"
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self.last_pay_index = inv["pay_index"]
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if not paid:
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continue
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except Exception as exc:
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logger.debug(exc)
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continue
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logger.trace(f"paid invoice: {inv}")
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# NOTE: use payment_hash when corelightning-rest returns it
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# when using waitAnyInvoice
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# payment_hash = inv["payment_hash"]
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# yield payment_hash
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# hack to return payment_hash if the above shouldn't work
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r = await self.client.get(
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f"{self.url}/v1/invoice/listInvoices",
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params={"label": inv["label"]},
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)
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paid_invoice = r.json()
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logger.trace(f"paid invoice: {paid_invoice}")
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if not self.statuses[paid_invoice["invoices"][0]["status"]]:
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raise ValueError("streamed invoice not paid")
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if "invoices" not in paid_invoice:
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raise ValueError("no invoices in response")
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if not len(paid_invoice["invoices"]):
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raise ValueError("no invoices in response")
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yield paid_invoice["invoices"][0]["payment_hash"]
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except Exception as exc:
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logger.debug(
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f"lost connection to corelightning-rest invoices stream: '{exc}', "
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"reconnecting..."
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)
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await asyncio.sleep(0.02)
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