Files
lnbits/lnbits/core/services/fiat_providers.py
T

273 lines
8.9 KiB
Python

import hashlib
import hmac
import json
import time
import httpx
from loguru import logger
from lnbits.core.crud import get_wallet
from lnbits.core.crud.payments import create_payment
from lnbits.core.models import CreatePayment, Payment, PaymentState
from lnbits.core.models.misc import SimpleStatus
from lnbits.db import Connection
from lnbits.fiat import get_fiat_provider
from lnbits.fiat.base import (
FiatPaymentFailedStatus,
FiatPaymentPendingStatus,
FiatPaymentStatus,
FiatPaymentSuccessStatus,
)
from lnbits.settings import settings
async def handle_fiat_payment_confirmation(
payment: Payment, conn: Connection | None = None
):
try:
await _credit_fiat_service_fee_wallet(payment, conn=conn)
except Exception as e:
logger.warning(e)
try:
await _debit_fiat_service_faucet_wallet(payment, conn=conn)
except Exception as e:
logger.warning(e)
async def check_fiat_status(
payment: Payment, skip_internal_payment_notifications: bool | None = False
) -> FiatPaymentStatus:
if not payment.is_internal:
return FiatPaymentPendingStatus()
if payment.success:
return FiatPaymentSuccessStatus()
if payment.failed:
return FiatPaymentFailedStatus()
if not payment.fiat_provider:
return FiatPaymentPendingStatus()
checking_id = payment.extra.get("fiat_checking_id")
if not checking_id:
return FiatPaymentPendingStatus()
fiat_provider = await get_fiat_provider(payment.fiat_provider)
if not fiat_provider:
return FiatPaymentPendingStatus()
fiat_status = await fiat_provider.get_invoice_status(checking_id)
if skip_internal_payment_notifications:
return fiat_status
if fiat_status.success:
# notify receivers asynchronously
from lnbits.tasks import internal_invoice_queue
await internal_invoice_queue.put(payment.checking_id)
return fiat_status
def check_stripe_signature(
payload: bytes,
sig_header: str | None,
secret: str | None,
tolerance_seconds=300,
):
if not sig_header:
logger.warning("Stripe-Signature header is missing.")
raise ValueError("Stripe-Signature header is missing.")
if not secret:
logger.warning("Stripe webhook signing secret is not set.")
raise ValueError("Stripe webhook cannot be verified.")
# Split the Stripe-Signature header
items = dict(i.split("=") for i in sig_header.split(","))
timestamp = int(items["t"])
signature = items["v1"]
# Check timestamp tolerance
if abs(time.time() - timestamp) > tolerance_seconds:
logger.warning("Timestamp outside tolerance.")
logger.debug(
f"Current time: {time.time()}, "
f"Timestamp: {timestamp}, "
f"Tolerance: {tolerance_seconds} seconds"
)
raise ValueError("Timestamp outside tolerance." f"Timestamp: {timestamp}")
signed_payload = f"{timestamp}.{payload.decode()}"
# Compute HMAC SHA256 using the webhook secret
computed_signature = hmac.new(
key=secret.encode(), msg=signed_payload.encode(), digestmod=hashlib.sha256
).hexdigest()
# Compare signatures using constant time comparison
if hmac.compare_digest(computed_signature, signature) is not True:
logger.warning("Stripe signature verification failed.")
raise ValueError("Stripe signature verification failed.")
async def verify_paypal_webhook(headers, payload: bytes):
"""
Validate PayPal webhook signatures using the PayPal verify API.
"""
webhook_id = settings.paypal_webhook_id
if not webhook_id:
logger.warning("PayPal webhook ID not set.")
raise ValueError("PayPal webhook cannot be verified. Missing webhook ID.")
required_headers = {
"PAYPAL-TRANSMISSION-ID": headers.get("PAYPAL-TRANSMISSION-ID"),
"PAYPAL-TRANSMISSION-TIME": headers.get("PAYPAL-TRANSMISSION-TIME"),
"PAYPAL-TRANSMISSION-SIG": headers.get("PAYPAL-TRANSMISSION-SIG"),
"PAYPAL-CERT-URL": headers.get("PAYPAL-CERT-URL"),
"PAYPAL-AUTH-ALGO": headers.get("PAYPAL-AUTH-ALGO"),
}
if not all(required_headers.values()):
logger.warning("Missing PayPal webhook headers.")
raise ValueError("PayPal webhook cannot be verified. Missing headers.")
try:
async with httpx.AsyncClient(base_url=settings.paypal_api_endpoint) as client:
token_resp = await client.post(
"/v1/oauth2/token",
data={"grant_type": "client_credentials"},
auth=(
settings.paypal_client_id or "",
settings.paypal_client_secret or "",
),
)
token_resp.raise_for_status()
access_token = token_resp.json().get("access_token")
if not access_token:
raise ValueError("PayPal token missing in verification flow.")
verify_resp = await client.post(
"/v1/notifications/verify-webhook-signature",
json={
"auth_algo": required_headers["PAYPAL-AUTH-ALGO"],
"cert_url": required_headers["PAYPAL-CERT-URL"],
"transmission_id": required_headers["PAYPAL-TRANSMISSION-ID"],
"transmission_sig": required_headers["PAYPAL-TRANSMISSION-SIG"],
"transmission_time": required_headers["PAYPAL-TRANSMISSION-TIME"],
"webhook_id": webhook_id,
"webhook_event": json.loads(payload.decode()),
},
headers={"Authorization": f"Bearer {access_token}"},
)
verify_resp.raise_for_status()
verification_status = verify_resp.json().get("verification_status")
if verification_status != "SUCCESS":
raise ValueError("PayPal webhook verification failed.")
except Exception as exc:
logger.warning(exc)
raise ValueError("PayPal webhook cannot be verified.") from exc
async def test_connection(provider: str) -> SimpleStatus:
"""
Test the connection to Stripe by checking if the API key is valid.
This function should be called when setting up or testing the Stripe integration.
"""
fiat_provider = await get_fiat_provider(provider)
if not fiat_provider:
return SimpleStatus(
success=False,
message=f"Fiat provider '{provider}' not found.",
)
status = await fiat_provider.status()
if status.error_message:
return SimpleStatus(
success=False,
message=f"Cconnection test failed: {status.error_message}",
)
return SimpleStatus(
success=True,
message="Connection test successful." f" Balance: {status.balance}.",
)
async def _credit_fiat_service_fee_wallet(
payment: Payment, conn: Connection | None = None
):
fiat_provider_name = payment.fiat_provider
if not fiat_provider_name:
return
if payment.fee == 0:
return
limits = settings.get_fiat_provider_limits(fiat_provider_name)
if not limits:
return
if not limits.service_fee_wallet_id:
return
memo = (
f"Service fee for fiat payment of "
f"{abs(payment.sat)} sats. "
f"Provider: {fiat_provider_name}. "
f"Wallet: '{payment.wallet_id}'."
)
create_payment_model = CreatePayment(
wallet_id=limits.service_fee_wallet_id,
bolt11=payment.bolt11,
payment_hash=payment.payment_hash,
amount_msat=abs(payment.fee),
memo=memo,
)
await create_payment(
checking_id=f"service_fee_{payment.payment_hash}",
data=create_payment_model,
status=PaymentState.SUCCESS,
conn=conn,
)
async def _debit_fiat_service_faucet_wallet(
payment: Payment, conn: Connection | None = None
):
fiat_provider_name = payment.fiat_provider
if not fiat_provider_name:
return
limits = settings.get_fiat_provider_limits(fiat_provider_name)
if not limits:
return
if not limits.service_faucet_wallet_id:
return
faucet_wallet = await get_wallet(limits.service_faucet_wallet_id, conn=conn)
if not faucet_wallet:
raise ValueError(
f"Fiat provider '{fiat_provider_name}' faucet wallet not found."
)
memo = (
f"Faucet payment of {abs(payment.sat)} sats. "
f"Provider: {fiat_provider_name}. "
f"Wallet: '{payment.wallet_id}'."
)
create_payment_model = CreatePayment(
wallet_id=limits.service_faucet_wallet_id,
bolt11=payment.bolt11,
payment_hash=payment.payment_hash,
amount_msat=-abs(payment.amount),
memo=memo,
extra=payment.extra,
)
await create_payment(
checking_id=f"internal_fiat_{fiat_provider_name}_"
f"faucet_{payment.payment_hash}",
data=create_payment_model,
status=PaymentState.SUCCESS,
conn=conn,
)