mirror of
https://github.com/aljazceru/nutshell.git
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131 lines
3.6 KiB
Python
131 lines
3.6 KiB
Python
import asyncio
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import hashlib
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import random
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from datetime import datetime
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from os import urandom
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from typing import AsyncGenerator, Dict, Optional, Set
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from bolt11 import (
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Bolt11,
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MilliSatoshi,
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TagChar,
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Tags,
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decode,
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encode,
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)
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from .base import (
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InvoiceResponse,
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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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BRR = True
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DELAY_PAYMENT = False
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STOCHASTIC_INVOICE = False
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class FakeWallet(Wallet):
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"""https://github.com/lnbits/lnbits"""
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queue: asyncio.Queue[Bolt11] = asyncio.Queue(0)
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payment_secrets: Dict[str, str] = dict()
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paid_invoices: Set[str] = set()
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secret: str = "FAKEWALLET SECRET"
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privkey: str = hashlib.pbkdf2_hmac(
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"sha256",
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secret.encode(),
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("FakeWallet").encode(),
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2048,
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32,
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).hex()
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async def status(self) -> StatusResponse:
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return StatusResponse(error_message=None, balance_msat=1337)
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async def create_invoice(
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self,
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amount: int,
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memo: Optional[str] = None,
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description_hash: Optional[bytes] = None,
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unhashed_description: Optional[bytes] = None,
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expiry: Optional[int] = None,
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payment_secret: Optional[bytes] = None,
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) -> InvoiceResponse:
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tags = Tags()
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if description_hash:
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tags.add(TagChar.description_hash, description_hash.hex())
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elif unhashed_description:
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tags.add(
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TagChar.description_hash,
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hashlib.sha256(unhashed_description).hexdigest(),
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)
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else:
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tags.add(TagChar.description, memo or "")
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if expiry:
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tags.add(TagChar.expire_time, expiry)
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if payment_secret:
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secret = payment_secret.hex()
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else:
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secret = urandom(32).hex()
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tags.add(TagChar.payment_secret, secret)
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payment_hash = hashlib.sha256(secret.encode()).hexdigest()
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tags.add(TagChar.payment_hash, payment_hash)
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self.payment_secrets[payment_hash] = secret
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bolt11 = Bolt11(
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currency="bc",
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amount_msat=MilliSatoshi(amount * 1000),
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date=int(datetime.now().timestamp()),
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tags=tags,
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)
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payment_request = encode(bolt11, self.privkey)
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return InvoiceResponse(
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ok=True, checking_id=payment_hash, payment_request=payment_request
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)
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async def pay_invoice(self, bolt11: str, fee_limit_msat: int) -> PaymentResponse:
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invoice = decode(bolt11)
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if DELAY_PAYMENT:
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await asyncio.sleep(5)
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if invoice.payment_hash in self.payment_secrets or BRR:
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await self.queue.put(invoice)
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self.paid_invoices.add(invoice.payment_hash)
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return PaymentResponse(
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ok=True,
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checking_id=invoice.payment_hash,
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fee_msat=0,
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preimage=self.payment_secrets.get(invoice.payment_hash) or "0" * 64,
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)
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else:
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return PaymentResponse(
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ok=False, error_message="Only internal invoices can be used!"
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)
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async def get_invoice_status(self, checking_id: str) -> PaymentStatus:
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if STOCHASTIC_INVOICE:
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paid = random.random() > 0.7
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return PaymentStatus(paid=paid)
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paid = checking_id in self.paid_invoices or BRR
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return PaymentStatus(paid=paid or None)
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async def get_payment_status(self, _: str) -> PaymentStatus:
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return PaymentStatus(paid=None)
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async def paid_invoices_stream(self) -> AsyncGenerator[str, None]:
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while True:
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value: Bolt11 = await self.queue.get()
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yield value.payment_hash
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