[feat] Add stripe payments (#3184)

lnbits/core/__init__.py

@@ -5,7 +5,9 @@ from .views.admin_api import admin_router
 from .views.api import api_router
 from .views.audit_api import audit_router
 from .views.auth_api import auth_router
+from .views.callback_api import callback_router
 from .views.extension_api import extension_router
+from .views.fiat_api import fiat_router
 
 # this compat is needed for usermanager extension
 from .views.generic import generic_router
@@ -34,10 +36,12 @@ def init_core_routers(app: FastAPI):
     app.include_router(wallet_router)
     app.include_router(api_router)
     app.include_router(websocket_router)
+    app.include_router(callback_router)
     app.include_router(tinyurl_router)
     app.include_router(webpush_router)
     app.include_router(users_router)
     app.include_router(audit_router)
+    app.include_router(fiat_router)
 
 
 __all__ = ["core_app", "core_app_extra", "db"]

lnbits/core/crud/users.py

@@ -195,6 +195,7 @@ async def get_user_from_account(
         wallets=wallets,
         admin=account.is_admin,
         super_user=account.is_super_user,
+        fiat_providers=account.fiat_providers,
         has_password=account.password_hash is not None,
     )
 

lnbits/core/migrations.py

@@ -719,3 +719,7 @@ async def m032_add_external_id_to_accounts(db: Connection):
     Used for external account linking.
     """
     await db.execute("ALTER TABLE accounts ADD COLUMN external_id TEXT")
+
+
+async def m033_update_payment_table(db: Connection):
+    await db.execute("ALTER TABLE apipayments ADD COLUMN fiat_provider TEXT")

lnbits/core/models/payments.py

@@ -8,6 +8,13 @@ from fastapi import Query
 from pydantic import BaseModel, Field, validator
 
 from lnbits.db import FilterModel
+from lnbits.fiat import get_fiat_provider
+from lnbits.fiat.base import (
+    FiatPaymentFailedStatus,
+    FiatPaymentPendingStatus,
+    FiatPaymentStatus,
+    FiatPaymentSuccessStatus,
+)
 from lnbits.utils.exchange_rates import allowed_currencies
 from lnbits.wallets import get_funding_source
 from lnbits.wallets.base import (
@@ -60,6 +67,8 @@ class Payment(BaseModel):
     amount: int
     fee: int
     bolt11: str
+    # payment_request: str | None
+    fiat_provider: str | None = None
     status: str = PaymentState.PENDING
     memo: str | None = None
     expiry: datetime | None = None
@@ -107,14 +116,23 @@ class Payment(BaseModel):
 
     @property
     def is_internal(self) -> bool:
-        return self.checking_id.startswith("internal_")
+        return self.checking_id.startswith("internal_") or self.checking_id.startswith(
+            "fiat_"
+        )
 
-    async def check_status(self) -> PaymentStatus:
+    async def check_status(
+        self, skip_internal_payment_notifications: bool | None = False
+    ) -> PaymentStatus:
         if self.is_internal:
             if self.success:
                 return PaymentSuccessStatus()
             if self.failed:
                 return PaymentFailedStatus()
+            if self.is_in and self.fiat_provider:
+                fiat_status = await self.check_fiat_status(
+                    skip_internal_payment_notifications
+                )
+                return PaymentStatus(paid=fiat_status.paid)
             return PaymentPendingStatus()
         funding_source = get_funding_source()
         if self.is_out:
@@ -123,6 +141,39 @@ class Payment(BaseModel):
             status = await funding_source.get_invoice_status(self.checking_id)
         return status
 
+    async def check_fiat_status(
+        self, skip_internal_payment_notifications: bool | None = False
+    ) -> FiatPaymentStatus:
+        if not self.is_internal:
+            return FiatPaymentPendingStatus()
+        if self.success:
+            return FiatPaymentSuccessStatus()
+        if self.failed:
+            return FiatPaymentFailedStatus()
+
+        if not self.fiat_provider:
+            return FiatPaymentPendingStatus()
+
+        checking_id = self.extra.get("fiat_checking_id")
+        if not checking_id:
+            return FiatPaymentPendingStatus()
+
+        fiat_provider = await get_fiat_provider(self.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(self.checking_id)
+
+        return fiat_status
+
 
 class PaymentFilters(FilterModel):
     __search_fields__ = ["memo", "amount", "wallet_id", "tag", "status", "time"]
@@ -206,6 +257,7 @@ class CreateInvoice(BaseModel):
     webhook: str | None = None
     bolt11: str | None = None
     lnurl_callback: str | None = None
+    fiat_provider: str | None = None
 
     @validator("unit")
     @classmethod

lnbits/core/models/users.py

@@ -110,11 +110,13 @@ class Account(BaseModel):
 
     is_super_user: bool = Field(default=False, no_database=True)
     is_admin: bool = Field(default=False, no_database=True)
+    fiat_providers: list[str] = Field(default=[], no_database=True)
 
     def __init__(self, **data):
         super().__init__(**data)
         self.is_super_user = settings.is_super_user(self.id)
         self.is_admin = settings.is_admin_user(self.id)
+        self.fiat_providers = settings.get_fiat_providers_for_user(self.id)
 
     def hash_password(self, password: str) -> str:
         """sets and returns the hashed password"""
@@ -191,6 +193,7 @@ class User(BaseModel):
     wallets: list[Wallet] = []
     admin: bool = False
     super_user: bool = False
+    fiat_providers: list[str] = []
     has_password: bool = False
     extra: UserExtra = UserExtra()
 

lnbits/core/services/__init__.py

@@ -8,11 +8,15 @@ from .payments import (
     calculate_fiat_amounts,
     check_transaction_status,
     check_wallet_limits,
+    create_fiat_invoice,
     create_invoice,
+    create_wallet_invoice,
     fee_reserve,
     fee_reserve_total,
+    get_payments_daily_stats,
     pay_invoice,
     service_fee,
+    update_pending_payment,
     update_pending_payments,
     update_wallet_balance,
 )
@@ -44,10 +48,14 @@ __all__ = [
     "check_transaction_status",
     "check_wallet_limits",
     "create_invoice",
+    "create_wallet_invoice",
+    "create_fiat_invoice",
     "fee_reserve",
     "fee_reserve_total",
+    "get_payments_daily_stats",
     "pay_invoice",
     "service_fee",
+    "update_pending_payment",
     "update_pending_payments",
     "update_wallet_balance",
     # settings

lnbits/core/services/fiat_providers.py

@@ -0,0 +1,92 @@
+import hashlib
+import hmac
+import time
+from typing import Optional
+
+from loguru import logger
+
+from lnbits.core.crud.payments import get_standalone_payment
+from lnbits.core.models.misc import SimpleStatus
+from lnbits.fiat import get_fiat_provider
+
+
+async def handle_stripe_event(event: dict):
+    event_id = event.get("id")
+    event_object = event.get("data", {}).get("object", {})
+    object_type = event_object.get("object")
+    payment_hash = event_object.get("metadata", {}).get("payment_hash")
+    logger.debug(
+        f"Handling Stripe event: '{event_id}'. Type: '{object_type}'."
+        f" Payment hash: '{payment_hash}'."
+    )
+    if not payment_hash:
+        logger.warning("Stripe event does not contain a payment hash.")
+        return
+
+    payment = await get_standalone_payment(payment_hash)
+    if not payment:
+        logger.warning(f"No payment found for hash: '{payment_hash}'.")
+        return
+    await payment.check_fiat_status()
+
+
+def check_stripe_signature(
+    payload: bytes,
+    sig_header: Optional[str],
+    secret: Optional[str],
+    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 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)
+    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}.",
+    )

lnbits/core/services/payments.py

@@ -1,8 +1,10 @@
 import asyncio
+import json
 import time
 from datetime import datetime, timedelta, timezone
 from typing import Optional
 
+import httpx
 from bolt11 import Bolt11, MilliSatoshi, Tags
 from bolt11 import decode as bolt11_decode
 from bolt11 import encode as bolt11_encode
@@ -11,11 +13,13 @@ from loguru import logger
 from lnbits.core.crud.payments import get_daily_stats
 from lnbits.core.db import db
 from lnbits.core.models import PaymentDailyStats, PaymentFilters
+from lnbits.core.models.payments import CreateInvoice
 from lnbits.db import Connection, Filters
 from lnbits.decorators import check_user_extension_access
 from lnbits.exceptions import InvoiceError, PaymentError
+from lnbits.fiat import get_fiat_provider
+from lnbits.helpers import check_callback_url
 from lnbits.settings import settings
-from lnbits.tasks import create_task
 from lnbits.utils.crypto import fake_privkey, random_secret_and_hash
 from lnbits.utils.exchange_rates import fiat_amount_as_satoshis, satoshis_amount_as_fiat
 from lnbits.wallets import fake_wallet, get_funding_source
@@ -94,6 +98,122 @@ async def pay_invoice(
     return payment
 
 
+async def create_fiat_invoice(
+    wallet_id: str, invoice_data: CreateInvoice, conn: Optional[Connection] = None
+):
+    fiat_provider_name = invoice_data.fiat_provider
+    if not fiat_provider_name:
+        raise ValueError("Fiat provider is required for fiat invoices.")
+    if not settings.is_fiat_provider_enabled(fiat_provider_name):
+        raise ValueError(
+            f"Fiat provider '{fiat_provider_name}' is not enabled.",
+        )
+
+    if invoice_data.unit == "sat":
+        raise ValueError("Fiat provider cannot be used with satoshis.")
+    amount_sat = await fiat_amount_as_satoshis(invoice_data.amount, invoice_data.unit)
+    await _check_fiat_invoice_limits(amount_sat, fiat_provider_name, conn)
+
+    invoice_data.internal = True  # use FakeWallet for fiat invoices
+    if not invoice_data.memo:
+        invoice_data.memo = settings.lnbits_site_title + f" ({fiat_provider_name})"
+
+    internal_payment = await create_wallet_invoice(wallet_id, invoice_data)
+
+    fiat_provider = await get_fiat_provider(fiat_provider_name)
+    fiat_invoice = await fiat_provider.create_invoice(
+        amount=invoice_data.amount,
+        payment_hash=internal_payment.payment_hash,
+        currency=invoice_data.unit,
+        memo=invoice_data.memo,
+    )
+    if fiat_invoice.failed:
+        logger.warning(fiat_invoice.error_message)
+        internal_payment.status = PaymentState.FAILED
+        await update_payment(internal_payment, conn=conn)
+        raise ValueError(
+            f"Cannot create payment request for '{fiat_provider_name}'.",
+        )
+
+    internal_payment.fee = -abs(
+        service_fee_fiat(internal_payment.msat, fiat_provider_name)
+    )
+
+    internal_payment.fiat_provider = fiat_provider_name
+    internal_payment.extra["fiat_checking_id"] = fiat_invoice.checking_id
+    # todo: move to payent
+    internal_payment.extra["fiat_payment_request"] = fiat_invoice.payment_request
+    new_checking_id = (
+        f"fiat_{fiat_provider_name}_"
+        f"{fiat_invoice.checking_id or internal_payment.checking_id}"
+    )
+    await update_payment(internal_payment, new_checking_id, conn=conn)
+    internal_payment.checking_id = new_checking_id
+
+    return internal_payment
+
+
+async def create_wallet_invoice(wallet_id: str, data: CreateInvoice) -> Payment:
+    description_hash = b""
+    unhashed_description = b""
+    memo = data.memo or settings.lnbits_site_title
+    if data.description_hash or data.unhashed_description:
+        if data.description_hash:
+            try:
+                description_hash = bytes.fromhex(data.description_hash)
+            except ValueError as exc:
+                raise ValueError(
+                    "'description_hash' must be a valid hex string"
+                ) from exc
+        if data.unhashed_description:
+            try:
+                unhashed_description = bytes.fromhex(data.unhashed_description)
+            except ValueError as exc:
+                raise ValueError(
+                    "'unhashed_description' must be a valid hex string",
+                ) from exc
+        # do not save memo if description_hash or unhashed_description is set
+        memo = ""
+
+    payment = await create_invoice(
+        wallet_id=wallet_id,
+        amount=data.amount,
+        memo=memo,
+        currency=data.unit,
+        description_hash=description_hash,
+        unhashed_description=unhashed_description,
+        expiry=data.expiry,
+        extra=data.extra,
+        webhook=data.webhook,
+        internal=data.internal,
+    )
+
+    # lnurl_response is not saved in the database
+    if data.lnurl_callback:
+        headers = {"User-Agent": settings.user_agent}
+        async with httpx.AsyncClient(headers=headers) as client:
+            try:
+                check_callback_url(data.lnurl_callback)
+                r = await client.get(
+                    data.lnurl_callback,
+                    params={"pr": payment.bolt11},
+                    timeout=10,
+                )
+                if r.is_error:
+                    payment.extra["lnurl_response"] = r.text
+                else:
+                    resp = json.loads(r.text)
+                    if resp["status"] != "OK":
+                        payment.extra["lnurl_response"] = resp["reason"]
+                    else:
+                        payment.extra["lnurl_response"] = True
+            except (httpx.ConnectError, httpx.RequestError) as ex:
+                logger.error(ex)
+                payment.extra["lnurl_response"] = False
+
+    return payment
+
+
 async def create_invoice(
     *,
     wallet_id: str,
@@ -226,6 +346,26 @@ def service_fee(amount_msat: int, internal: bool = False) -> int:
         return 0
 
 
+def service_fee_fiat(amount_msat: int, fiat_provider_name: str) -> int:
+    """
+    Calculate the service fee for a fiat provider based on the amount in msat.
+    Return the fee in msat.
+    """
+    limits = settings.get_fiat_provider_limits(fiat_provider_name)
+    if not limits:
+        return 0
+    amount_msat = abs(amount_msat)
+    fee_max = limits.service_max_fee_sats * 1000
+    if not limits.service_fee_wallet_id:
+        return 0
+
+    fee_percentage = int(amount_msat / 100 * limits.service_fee_percent)
+    if fee_max > 0 and fee_percentage > fee_max:
+        return fee_max
+    else:
+        return fee_percentage
+
+
 async def update_wallet_balance(
     wallet: Wallet,
     amount: int,
@@ -449,6 +589,20 @@ async def get_payments_daily_stats(
     return data
 
 
+async def handle_fiat_payment_confirmation(
+    payment: Payment, conn: Optional[Connection] = 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 _pay_invoice(
     wallet_id: str,
     create_payment_model: CreatePayment,
@@ -573,6 +727,8 @@ async def _pay_external_invoice(
     fee_reserve_msat = fee_reserve(amount_msat, internal=False)
     service_fee_msat = service_fee(amount_msat, internal=False)
 
+    from lnbits.tasks import create_task
+
     task = create_task(
         _fundingsource_pay_invoice(checking_id, payment.bolt11, fee_reserve_msat)
     )
@@ -728,3 +884,126 @@ async def _credit_service_fee_wallet(
         status=PaymentState.SUCCESS,
         conn=conn,
     )
+
+
+async def _credit_fiat_service_fee_wallet(
+    payment: Payment, conn: Optional[Connection] = 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: Optional[Connection] = 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,
+    )
+
+
+async def _check_fiat_invoice_limits(
+    amount_sat: int, fiat_provider_name: str, conn: Optional[Connection] = None
+):
+    limits = settings.get_fiat_provider_limits(fiat_provider_name)
+    if not limits:
+        raise ValueError(
+            f"Fiat provider '{fiat_provider_name}' does not have limits configured.",
+        )
+
+    min_amount_sat = limits.service_min_amount_sats
+    if min_amount_sat and (amount_sat < min_amount_sat):
+        raise ValueError(
+            f"Minimum amount is {min_amount_sat} " f"sats for '{fiat_provider_name}'.",
+        )
+    max_amount_sats = limits.service_max_amount_sats
+    if max_amount_sats and (amount_sat > max_amount_sats):
+        raise ValueError(
+            f"Maximum amount is {max_amount_sats} " f"sats for '{fiat_provider_name}'.",
+        )
+
+    if limits.service_max_fee_sats > 0 or limits.service_fee_percent > 0:
+        if not limits.service_fee_wallet_id:
+            raise ValueError(
+                f"Fiat provider '{fiat_provider_name}' service fee wallet missing.",
+            )
+        fees_wallet = await get_wallet(limits.service_fee_wallet_id, conn=conn)
+        if not fees_wallet:
+            raise ValueError(
+                f"Fiat provider '{fiat_provider_name}' service fee wallet not found.",
+            )
+
+    if limits.service_faucet_wallet_id:
+        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.",
+            )
+        if faucet_wallet.balance < amount_sat:
+            raise ValueError(
+                f"The amount exceeds the '{fiat_provider_name}'"
+                "faucet wallet balance.",
+            )

lnbits/core/templates/admin/_tab_fiat_providers.html

@@ -0,0 +1,287 @@
+<q-tab-panel name="fiat_providers">
+  <h6 class="q-my-none q-mb-sm">
+    <span v-text="$t('fiat_providers')"></span>
+    <q-btn
+      round
+      flat
+      @click="hideInputsToggle()"
+      :icon="hideInputToggle ? 'visibility_off' : 'visibility'"
+    ></q-btn>
+  </h6>
+
+  <div class="row">
+    <div class="col">
+      <q-list bordered class="rounded-borders">
+        <q-expansion-item header-class="text-primary text-bold">
+          <template v-slot:header>
+            <q-item-section avatar>
+              <q-avatar>
+                <img
+                  :src="'{{ static_url_for('static', 'images/stripe_logo.ico') }}'"
+                />
+              </q-avatar>
+            </q-item-section>
+
+            <q-item-section> Stripe </q-item-section>
+
+            <q-item-section side>
+              <div class="row items-center">
+                <q-toggle
+                  size="md"
+                  :label="$t('enabled')"
+                  v-model="formData.stripe_enabled"
+                  color="green"
+                  unchecked-icon="clear"
+                />
+              </div>
+            </q-item-section>
+          </template>
+
+          <q-card class="q-pb-xl">
+            <q-expansion-item :label="$t('api')" default-opened>
+              <q-card-section class="q-pa-md">
+                <q-input
+                  filled
+                  type="text"
+                  v-model="formData.stripe_api_endpoint"
+                  :label="$t('endpoint')"
+                ></q-input>
+                <q-input
+                  filled
+                  class="q-mt-md"
+                  :type="hideInputToggle ? 'password' : 'text'"
+                  v-model="formData.stripe_api_secret_key"
+                  :label="$t('secret_key')"
+                ></q-input>
+                <q-input
+                  filled
+                  class="q-mt-md"
+                  type="text"
+                  v-model="formData.stripe_payment_success_url"
+                  :label="$t('callback_success_url')"
+                  :hint="$t('callback_success_url_hint')"
+                ></q-input>
+              </q-card-section>
+              <q-card-section class="q-pa-md">
+                <div class="row">
+                  <div class="col">
+                    <q-btn
+                      outline
+                      color="grey"
+                      class="float-right"
+                      :label="$t('check_connection')"
+                      @click="checkFiatProvider('stripe')"
+                    ></q-btn>
+                  </div>
+                </div>
+              </q-card-section>
+            </q-expansion-item>
+
+            <q-expansion-item :label="$t('webhook')" default-opened>
+              <q-card-section>
+                <span v-text="$t('webhook_stripe_description')"></span>
+              </q-card-section>
+              <q-card-section>
+                <q-input
+                  filled
+                  class="q-mt-md"
+                  type="text"
+                  disable
+                  v-model="formData.stripe_payment_webhook_url"
+                  :label="$t('webhook_url')"
+                  :hint="$t('webhook_url_hint')"
+                ></q-input>
+                <q-input
+                  filled
+                  class="q-mt-md"
+                  :type="hideInputToggle ? 'password' : 'text'"
+                  v-model="formData.stripe_webhook_signing_secret"
+                  :label="$t('signing_secret')"
+                  :hint="$t('signing_secret_hint')"
+                ></q-input>
+              </q-card-section>
+              <q-card-section>
+                <span v-text="$t('webhook_events_list')"></span>
+                <ul>
+                  <li><code>checkout.session.async_payment_failed</code></li>
+                  <li><code>checkout.session.async_payment_succeeded</code></li>
+                  <li><code>checkout.session.completed</code></li>
+                  <li><code>checkout.session.expired</code></li>
+                </ul>
+              </q-card-section>
+            </q-expansion-item>
+            <q-expansion-item :label="$t('service_fee')">
+              <q-card-section>
+                <div class="row">
+                  <div class="col-md-4 col-sm-12">
+                    <q-input
+                      filled
+                      class="q-ma-sm"
+                      type="number"
+                      min="0"
+                      v-model="formData.stripe_limits.service_fee_percent"
+                      @update:model-value="touchSettings()"
+                      :label="$t('service_fee_label')"
+                      :hint="$t('service_fee_hint')"
+                    ></q-input>
+                  </div>
+                  <div class="col-md-4 col-sm-12">
+                    <q-input
+                      filled
+                      class="q-ma-sm"
+                      type="number"
+                      min="0"
+                      v-model="formData.stripe_limits.service_max_fee_sats"
+                      @update:model-value="touchSettings()"
+                      :label="$t('service_fee_max')"
+                      :hint="$t('service_fee_max_hint')"
+                    ></q-input>
+                  </div>
+                  <div class="col-md-4 col-sm-12">
+                    <q-input
+                      filled
+                      class="q-ma-sm"
+                      type="text"
+                      v-model="formData.stripe_limits.service_fee_wallet_id"
+                      @update:model-value="touchSettings()"
+                      :label="$t('fee_wallet_label')"
+                      :hint="$t('fee_wallet_hint')"
+                    ></q-input>
+                  </div>
+                </div>
+              </q-card-section>
+            </q-expansion-item>
+            <q-expansion-item :label="$t('amount_limits')">
+              <q-card-section>
+                <div class="row">
+                  <div class="col-md-4 col-sm-12">
+                    <q-input
+                      filled
+                      class="q-ma-sm"
+                      type="number"
+                      min="0"
+                      v-model="formData.stripe_limits.service_min_amount_sats"
+                      @update:model-value="touchSettings()"
+                      :label="$t('min_incoming_payment_amount')"
+                      :hint="$t('min_incoming_payment_amount_desc')"
+                    ></q-input>
+                  </div>
+                  <div class="col-md-4 col-sm-12">
+                    <q-input
+                      filled
+                      class="q-ma-sm"
+                      type="number"
+                      min="0"
+                      v-model="formData.stripe_limits.service_max_amount_sats"
+                      @update:model-value="touchSettings()"
+                      :label="$t('max_incoming_payment_amount')"
+                      :hint="$t('max_incoming_payment_amount_desc')"
+                    ></q-input>
+                  </div>
+                  <div class="col-md-4 col-sm-12">
+                    <q-input
+                      filled
+                      class="q-ma-sm"
+                      v-model="formData.stripe_limits.service_faucet_wallet_id"
+                      @update:model-value="touchSettings()"
+                      :label="$t('faucest_wallet_id')"
+                      :hint="$t('faucest_wallet_id_hint')"
+                    ></q-input>
+                  </div>
+                </div>
+                <q-item>
+                  <q-item-section>
+                    <q-item-label v-text="$t('faucest_wallet')"></q-item-label>
+                    <q-item-label caption>
+                      <ul>
+                        <li>
+                          <span
+                            v-text="$t('faucest_wallet_desc_1', {provider: 'stripe'})"
+                          ></span>
+                        </li>
+                        <li>
+                          <span
+                            v-text="$t('faucest_wallet_desc_2', {provider: 'stripe'})"
+                          ></span>
+                        </li>
+                        <li>
+                          <span v-text="$t('faucest_wallet_desc_3')"></span>
+                        </li>
+                        <li>
+                          <span
+                            v-text="$t('faucest_wallet_desc_4', {provider: 'stripe'})"
+                          ></span>
+                        </li>
+                        <li>
+                          <span v-text="$t('faucest_wallet_desc_5')"></span>
+                        </li>
+                      </ul>
+                      <br />
+                    </q-item-label>
+                  </q-item-section>
+                </q-item>
+              </q-card-section>
+            </q-expansion-item>
+            <q-expansion-item :label="$t('allowed_users')">
+              <q-card-section>
+                <q-input
+                  filled
+                  v-model="formAddStripeUser"
+                  @keydown.enter="addAllowedUser"
+                  type="text"
+                  :label="$t('allowed_users_label')"
+                  :hint="$t('allowed_users_hint_feature', {feature: 'Stripe'})"
+                >
+                  <q-btn
+                    @click="addStripeAllowedUser"
+                    dense
+                    flat
+                    icon="add"
+                  ></q-btn>
+                </q-input>
+                <div>
+                  <q-chip
+                    v-for="user in formData.stripe_limits.allowed_users"
+                    @update:model-value="touchSettings()"
+                    :key="user"
+                    removable
+                    @remove="removeStripeAllowedUser(user)"
+                    color="primary"
+                    text-color="white"
+                    :label="user"
+                    class="ellipsis"
+                  >
+                  </q-chip>
+                </div>
+              </q-card-section>
+            </q-expansion-item>
+          </q-card>
+        </q-expansion-item>
+
+        <q-separator />
+
+        <q-expansion-item header-class="text-primary text-bold">
+          <template v-slot:header>
+            <q-item-section avatar>
+              <q-avatar>
+                <img
+                  :src="'{{ static_url_for('static', 'images/square_logo.png') }}'"
+                />
+              </q-avatar>
+            </q-item-section>
+
+            <q-item-section> Square </q-item-section>
+
+            <q-item-section side>
+              <div class="row items-center">Disabled</div>
+            </q-item-section>
+          </template>
+
+          <q-card>
+            <q-card-section> Coming Soon </q-card-section>
+          </q-card>
+        </q-expansion-item>
+      </q-list>
+    </div>
+  </div>
+</q-tab-panel>

lnbits/core/templates/admin/index.html

@@ -115,6 +115,13 @@ import window_vars with context %} {% block scripts %} {{ window_vars(user) }}
               ><q-tooltip v-if="!$q.screen.gt.sm"
                 ><span v-text="$t('exchanges')"></span></q-tooltip
             ></q-tab>
+            <q-tab
+              name="fiat_providers"
+              icon="credit_score"
+              :label="$q.screen.gt.sm ? $t('fiat_providers') : null"
+              ><q-tooltip v-if="!$q.screen.gt.sm"
+                ><span v-text="$t('fiat_providers')"></span></q-tooltip
+            ></q-tab>
             <q-tab
               name="users"
               icon="group"
@@ -183,7 +190,8 @@ import window_vars with context %} {% block scripts %} {{ window_vars(user) }}
               >
                 {% include "admin/_tab_funding.html" %} {% include
                 "admin/_tab_users.html" %} {% include "admin/_tab_server.html"
-                %} {% include "admin/_tab_exchange_providers.html" %} {% include
+                %} {% include "admin/_tab_exchange_providers.html" %}{% include
+                "admin/_tab_fiat_providers.html" %} {% include
                 "admin/_tab_extensions.html" %} {% include
                 "admin/_tab_notifications.html" %} {% include
                 "admin/_tab_security.html" %} {% include "admin/_tab_theme.html"

lnbits/core/templates/core/wallet.html

@@ -211,7 +211,12 @@
         </q-card>
         <div id="hiddenQrCodeContainer" style="display: none">
           <lnbits-qrcode
-            :value="'lightning:' + this.receive.paymentReq"
+            v-if="receive.fiatPaymentReq"
+            :value="receive.fiatPaymentReq"
+          ></lnbits-qrcode>
+          <lnbits-qrcode
+            v-else
+            :value="'lightning:' + (this.receive.paymentReq || '').toUpperCase()"
           ></lnbits-qrcode>
         </div>
       </div>
@@ -619,6 +624,8 @@
               :readonly="receive.lnurl && receive.lnurl.fixed"
             ></q-input>
             {% else %}
+            <div class="row">
+              <div class="col-10">
                 <q-select
                   filled
                   dense
@@ -627,6 +634,20 @@
                   :label="$t('unit')"
                   :options="receive.units"
                 ></q-select>
+              </div>
+              <div class="col-2">
+                <q-btn
+                  v-if="g.fiatTracking"
+                  @click="swapBalancePriority"
+                  class="float-right"
+                  color="primary"
+                  flat
+                  dense
+                  icon="swap_vert"
+                ></q-btn>
+              </div>
+            </div>
+
             <q-input
               ref="setAmount"
               filled
@@ -644,9 +665,59 @@
             <q-input
               filled
               dense
+              type="textarea"
+              rows="2"
               v-model.trim="receive.data.memo"
               :label="$t('memo')"
             ></q-input>
+            <div v-if="g.user.fiat_providers?.length" class="q-mt-md">
+              <q-list bordered dense class="rounded-borders">
+                <q-item-label dense header>
+                  <span v-text="$t('select_payment_provider')"></span>
+                </q-item-label>
+                <q-separator></q-separator>
+                <q-item
+                  :active="!receive.fiatProvider"
+                  @click="receive.fiatProvider = ''"
+                  active-class="bg-teal-1 text-grey-8 text-weight-bold"
+                  clickable
+                  v-ripple
+                >
+                  <q-item-section avatar>
+                    <q-avatar square>
+                      <img
+                        :src="'{{ static_url_for('static', 'images/logos/lnbits.png') }}'"
+                      />
+                    </q-avatar>
+                  </q-item-section>
+                  <q-item-section>
+                    <span
+                      v-text="$t('pay_with', {provider: 'Lightning Network'})"
+                    ></span>
+                  </q-item-section>
+                </q-item>
+                <q-separator></q-separator>
+                <q-item
+                  :active="receive.fiatProvider === 'stripe'"
+                  @click="receive.fiatProvider = 'stripe'"
+                  active-class="bg-teal-1 text-grey-8 text-weight-bold"
+                  clickable
+                  v-ripple
+                >
+                  <q-item-section avatar>
+                    <q-avatar>
+                      <img
+                        :src="'{{ static_url_for('static', 'images/stripe_logo.ico') }}'"
+                      />
+                    </q-avatar>
+                  </q-item-section>
+                  <q-item-section>
+                    <span v-text="$t('pay_with', {provider: 'Stripe'})"></span>
+                  </q-item-section>
+                </q-item>
+              </q-list>
+            </div>
+
             <div v-if="receive.status == 'pending'" class="row q-mt-lg">
               <q-btn
                 unelevated
@@ -680,7 +751,14 @@
           class="q-pa-lg q-pt-xl lnbits__dialog-card"
         >
           <div class="text-center q-mb-lg">
-            <a :href="'lightning:' + receive.paymentReq">
+            <a
+              v-if="receive.fiatPaymentReq"
+              :href="receive.fiatPaymentReq"
+              target="_blank"
+            >
+              <div v-html="invoiceQrCode"></div>
+            </a>
+            <a v-else :href="'lightning:' + receive.paymentReq">
               <div v-html="invoiceQrCode"></div>
             </a>
           </div>
@@ -691,6 +769,7 @@
             <h5 v-if="receive.unit != 'sat'" class="q-mt-none q-mb-sm">
               <span v-text="formattedSatAmount"></span>
             </h5>
+            <div v-if="!receive.fiatPaymentReq">
               <q-chip v-if="hasNfc" outline square color="positive">
                 <q-avatar
                   icon="nfc"
@@ -705,11 +784,12 @@
                 v-text="$t('nfc_not_supported')"
               ></span>
             </div>
+          </div>
           <div class="row q-mt-lg">
             <q-btn
               outline
               color="grey"
-              @click="copyText(receive.paymentReq)"
+              @click="copyText(receive.fiatPaymentReq || receive.paymentReq)"
               :label="$t('copy_invoice')"
             ></q-btn>
             <q-btn

lnbits/core/views/callback_api.py

@@ -0,0 +1,35 @@
+from fastapi import APIRouter, Request
+
+from lnbits.core.models.misc import SimpleStatus
+from lnbits.core.services.fiat_providers import (
+    check_stripe_signature,
+    handle_stripe_event,
+)
+from lnbits.settings import settings
+
+callback_router = APIRouter(prefix="/api/v1/callback", tags=["callback"])
+
+
+@callback_router.post("/{provider_name}")
+async def api_generic_webhook_handler(
+    provider_name: str, request: Request
+) -> SimpleStatus:
+
+    if provider_name.lower() == "stripe":
+        payload = await request.body()
+        sig_header = request.headers.get("Stripe-Signature")
+        check_stripe_signature(
+            payload, sig_header, settings.stripe_webhook_signing_secret
+        )
+        event = await request.json()
+        await handle_stripe_event(event)
+
+        return SimpleStatus(
+            success=True,
+            message=f"Callback received successfully from '{provider_name}'.",
+        )
+
+    return SimpleStatus(
+        success=False,
+        message=f"Unknown fiat provider '{provider_name}'.",
+    )

lnbits/core/views/fiat_api.py

@@ -0,0 +1,18 @@
+from http import HTTPStatus
+
+from fastapi import APIRouter, Depends
+
+from lnbits.core.models.misc import SimpleStatus
+from lnbits.core.services.fiat_providers import test_connection
+from lnbits.decorators import check_admin
+
+fiat_router = APIRouter(tags=["Fiat API"], prefix="/api/v1/fiat")
+
+
+@fiat_router.put(
+    "/check/{provider}",
+    status_code=HTTPStatus.OK,
+    dependencies=[Depends(check_admin)],
+)
+async def api_test_fiat_provider(provider: str) -> SimpleStatus:
+    return await test_connection(provider)

lnbits/core/views/payment_api.py

@@ -34,13 +34,8 @@ from lnbits.core.models import (
     PaymentFilters,
     PaymentHistoryPoint,
     PaymentWalletStats,
-    Wallet,
 )
 from lnbits.core.models.users import User
-from lnbits.core.services.payments import (
-    get_payments_daily_stats,
-    update_pending_payment,
-)
 from lnbits.db import Filters, Page
 from lnbits.decorators import (
     WalletTypeInfo,
@@ -67,9 +62,12 @@ from ..crud import (
     get_wallet_for_key,
 )
 from ..services import (
-    create_invoice,
+    create_fiat_invoice,
+    create_wallet_invoice,
     fee_reserve_total,
+    get_payments_daily_stats,
     pay_invoice,
+    update_pending_payment,
     update_pending_payments,
 )
 
@@ -198,69 +196,6 @@ async def api_payments_paginated(
     return page
 
 
-async def _api_payments_create_invoice(data: CreateInvoice, wallet: Wallet):
-    description_hash = b""
-    unhashed_description = b""
-    memo = data.memo or settings.lnbits_site_title
-    if data.description_hash or data.unhashed_description:
-        if data.description_hash:
-            try:
-                description_hash = bytes.fromhex(data.description_hash)
-            except ValueError as exc:
-                raise HTTPException(
-                    status_code=HTTPStatus.BAD_REQUEST,
-                    detail="'description_hash' must be a valid hex string",
-                ) from exc
-        if data.unhashed_description:
-            try:
-                unhashed_description = bytes.fromhex(data.unhashed_description)
-            except ValueError as exc:
-                raise HTTPException(
-                    status_code=HTTPStatus.BAD_REQUEST,
-                    detail="'unhashed_description' must be a valid hex string",
-                ) from exc
-        # do not save memo if description_hash or unhashed_description is set
-        memo = ""
-
-    payment = await create_invoice(
-        wallet_id=wallet.id,
-        amount=data.amount,
-        memo=memo,
-        currency=data.unit,
-        description_hash=description_hash,
-        unhashed_description=unhashed_description,
-        expiry=data.expiry,
-        extra=data.extra,
-        webhook=data.webhook,
-        internal=data.internal,
-    )
-
-    # lnurl_response is not saved in the database
-    if data.lnurl_callback:
-        headers = {"User-Agent": settings.user_agent}
-        async with httpx.AsyncClient(headers=headers) as client:
-            try:
-                check_callback_url(data.lnurl_callback)
-                r = await client.get(
-                    data.lnurl_callback,
-                    params={"pr": payment.bolt11},
-                    timeout=10,
-                )
-                if r.is_error:
-                    payment.extra["lnurl_response"] = r.text
-                else:
-                    resp = json.loads(r.text)
-                    if resp["status"] != "OK":
-                        payment.extra["lnurl_response"] = resp["reason"]
-                    else:
-                        payment.extra["lnurl_response"] = True
-            except (httpx.ConnectError, httpx.RequestError) as ex:
-                logger.error(ex)
-                payment.extra["lnurl_response"] = False
-
-    return payment
-
-
 @payment_router.get(
     "/all/paginated",
     name="Payment List",
@@ -308,6 +243,7 @@ async def api_payments_create(
     invoice_data: CreateInvoice,
     wallet: WalletTypeInfo = Depends(require_invoice_key),
 ) -> Payment:
+    wallet_id = wallet.wallet.id
     if invoice_data.out is True and wallet.key_type == KeyType.admin:
         if not invoice_data.bolt11:
             raise HTTPException(
@@ -315,21 +251,24 @@ async def api_payments_create(
                 detail="Missing BOLT11 invoice",
             )
         payment = await pay_invoice(
-            wallet_id=wallet.wallet.id,
+            wallet_id=wallet_id,
             payment_request=invoice_data.bolt11,
             extra=invoice_data.extra,
         )
         return payment
 
-    elif not invoice_data.out:
-        # invoice key
-        return await _api_payments_create_invoice(invoice_data, wallet.wallet)
-    else:
+    if invoice_data.out:
         raise HTTPException(
             status_code=HTTPStatus.FORBIDDEN,
             detail="Invoice (or Admin) key required.",
         )
 
+    # If the payment is not outgoing, we can create a new invoice.
+    if invoice_data.fiat_provider:
+        return await create_fiat_invoice(wallet_id, invoice_data)
+
+    return await create_wallet_invoice(wallet_id, invoice_data)
+
 
 @payment_router.get("/fee-reserve")
 async def api_payments_fee_reserve(invoice: str = Query("invoice")) -> JSONResponse:

lnbits/exceptions.py

@@ -26,6 +26,10 @@ class InvoiceError(Exception):
         self.status = status
 
 
+class UnsupportedError(Exception):
+    pass
+
+
 def render_html_error(request: Request, exc: Exception) -> Optional[Response]:
     # Only the browser sends "text/html" request
     # not fail proof, but everything else get's a JSON response

lnbits/fiat/__init__.py

@@ -0,0 +1,46 @@
+from __future__ import annotations
+
+import importlib
+from enum import Enum
+
+from lnbits.fiat.base import FiatProvider
+from lnbits.settings import settings
+
+from .stripe import StripeWallet
+
+fiat_module = importlib.import_module("lnbits.fiat")
+
+
+class FiatProviderType(Enum):
+    stripe = "StripeWallet"
+
+
+async def get_fiat_provider(name: str) -> FiatProvider:
+    if name not in FiatProviderType.__members__:
+        raise ValueError(f"Fiat provider '{name}' is not supported.")
+
+    fiat_provider = fiat_providers.get(name)
+    if fiat_provider:
+        status = await fiat_provider.status(only_check_settings=True)
+        if status.error_message:
+            await fiat_provider.cleanup()
+            del fiat_providers[name]
+        else:
+            return fiat_provider
+    fiat_providers[name] = _init_fiat_provider(FiatProviderType[name])
+    return fiat_providers[name]
+
+
+def _init_fiat_provider(fiat_provider: FiatProviderType) -> FiatProvider:
+    if not settings.is_fiat_provider_enabled(fiat_provider.name):
+        raise ValueError(f"Fiat provider '{fiat_provider.name}' not enabled.")
+    provider_constructor = getattr(fiat_module, fiat_provider.value)
+    return provider_constructor()
+
+
+fiat_providers: dict[str, FiatProvider] = {}
+
+
+__all__ = [
+    "StripeWallet",
+]

lnbits/fiat/base.py

@@ -0,0 +1,134 @@
+from __future__ import annotations
+
+from abc import ABC, abstractmethod
+from typing import TYPE_CHECKING, AsyncGenerator, Coroutine, NamedTuple
+
+if TYPE_CHECKING:
+    pass
+
+
+class FiatStatusResponse(NamedTuple):
+    error_message: str | None = None
+    balance: float = 0
+
+
+class FiatInvoiceResponse(NamedTuple):
+    ok: bool
+    checking_id: str | None = None  # payment_hash, rpc_id
+    payment_request: str | None = None
+    error_message: str | None = None
+
+    @property
+    def success(self) -> bool:
+        return self.ok is True
+
+    @property
+    def pending(self) -> bool:
+        return self.ok is None
+
+    @property
+    def failed(self) -> bool:
+        return self.ok is False
+
+
+class FiatPaymentResponse(NamedTuple):
+    # when ok is None it means we don't know if this succeeded
+    ok: bool | None = None
+    checking_id: str | None = None  # payment_hash, rcp_id
+    fee: float | None = None
+    error_message: str | None = None
+
+    @property
+    def success(self) -> bool:
+        return self.ok is True
+
+    @property
+    def pending(self) -> bool:
+        return self.ok is None
+
+    @property
+    def failed(self) -> bool:
+        return self.ok is False
+
+
+class FiatPaymentStatus(NamedTuple):
+    paid: bool | None = None
+    fee: float | None = None  # todo: what fee is this?
+
+    @property
+    def success(self) -> bool:
+        return self.paid is True
+
+    @property
+    def pending(self) -> bool:
+        return self.paid is not True
+
+    @property
+    def failed(self) -> bool:
+        return self.paid is False
+
+    def __str__(self) -> str:
+        if self.success:
+            return "success"
+        if self.failed:
+            return "failed"
+        return "pending"
+
+
+class FiatPaymentSuccessStatus(FiatPaymentStatus):
+    paid = True
+
+
+class FiatPaymentFailedStatus(FiatPaymentStatus):
+    paid = False
+
+
+class FiatPaymentPendingStatus(FiatPaymentStatus):
+    paid = None
+
+
+class FiatProvider(ABC):
+    @abstractmethod
+    async def cleanup(self):
+        pass
+
+    @abstractmethod
+    def status(
+        self, only_check_settings: bool | None = False
+    ) -> Coroutine[None, None, FiatStatusResponse]:
+        pass
+
+    @abstractmethod
+    def create_invoice(
+        self,
+        amount: float,
+        payment_hash: str,
+        currency: str,
+        memo: str | None = None,
+        **kwargs,
+    ) -> Coroutine[None, None, FiatInvoiceResponse]:
+        pass
+
+    @abstractmethod
+    def pay_invoice(
+        self,
+        payment_request: str,
+    ) -> Coroutine[None, None, FiatPaymentResponse]:
+        pass
+
+    @abstractmethod
+    def get_invoice_status(
+        self, checking_id: str
+    ) -> Coroutine[None, None, FiatPaymentStatus]:
+        pass
+
+    @abstractmethod
+    def get_payment_status(
+        self, checking_id: str
+    ) -> Coroutine[None, None, FiatPaymentStatus]:
+        pass
+
+    async def paid_invoices_stream(
+        self,
+    ) -> AsyncGenerator[str, None]:
+        yield ""

lnbits/fiat/stripe.py

@@ -0,0 +1,173 @@
+import asyncio
+import json
+from datetime import datetime, timedelta, timezone
+from typing import AsyncGenerator, Optional
+from urllib.parse import urlencode
+
+import httpx
+from loguru import logger
+
+from lnbits.helpers import normalize_endpoint
+from lnbits.settings import settings
+
+from .base import (
+    FiatInvoiceResponse,
+    FiatPaymentFailedStatus,
+    FiatPaymentPendingStatus,
+    FiatPaymentResponse,
+    FiatPaymentStatus,
+    FiatPaymentSuccessStatus,
+    FiatProvider,
+    FiatStatusResponse,
+)
+
+
+class StripeWallet(FiatProvider):
+    """https://docs.stripe.com/api"""
+
+    def __init__(self):
+        logger.debug("Initializing StripeWallet")
+        self._settings_fields = self._settings_connection_fields()
+        if not settings.stripe_api_endpoint:
+            raise ValueError("Cannot initialize StripeWallet: missing endpoint.")
+
+        if not settings.stripe_api_secret_key:
+            raise ValueError("Cannot initialize StripeWallet: missing API secret key.")
+        self.endpoint = normalize_endpoint(settings.stripe_api_endpoint)
+        self.headers = {
+            "Authorization": f"Bearer {settings.stripe_api_secret_key}",
+            "User-Agent": settings.user_agent,
+        }
+        self.client = httpx.AsyncClient(base_url=self.endpoint, headers=self.headers)
+        logger.info("StripeWallet initialized.")
+
+    async def cleanup(self):
+        try:
+            await self.client.aclose()
+        except RuntimeError as e:
+            logger.warning(f"Error closing stripe wallet connection: {e}")
+
+    async def status(
+        self, only_check_settings: Optional[bool] = False
+    ) -> FiatStatusResponse:
+        if only_check_settings:
+            if self._settings_fields != self._settings_connection_fields():
+                return FiatStatusResponse("Connection settings have changed.", 0)
+            return FiatStatusResponse(balance=0)
+
+        try:
+            r = await self.client.get(url="/v1/balance", timeout=15)
+            r.raise_for_status()
+            data = r.json()
+
+            available_balance = data.get("available", [{}])[0].get("amount", 0)
+            # pending_balance = data.get("pending", {}).get("amount", 0)
+
+            return FiatStatusResponse(balance=available_balance)
+        except json.JSONDecodeError:
+            return FiatStatusResponse("Server error: 'invalid json response'", 0)
+        except Exception as exc:
+            logger.warning(exc)
+            return FiatStatusResponse(f"Unable to connect to {self.endpoint}.", 0)
+
+    async def create_invoice(
+        self,
+        amount: float,
+        payment_hash: str,
+        currency: str,
+        memo: Optional[str] = None,
+        **kwargs,
+    ) -> FiatInvoiceResponse:
+        amount_cents = int(amount * 100)
+        form_data = [
+            ("mode", "payment"),
+            (
+                "success_url",
+                settings.stripe_payment_success_url or "https://lnbits.com",
+            ),
+            ("metadata[payment_hash]", payment_hash),
+            ("line_items[0][price_data][currency]", currency.lower()),
+            ("line_items[0][price_data][product_data][name]", memo or "LNbits Invoice"),
+            ("line_items[0][price_data][unit_amount]", amount_cents),
+            ("line_items[0][quantity]", "1"),
+        ]
+        encoded_data = urlencode(form_data)
+
+        try:
+            headers = self.headers.copy()
+            headers["Content-Type"] = "application/x-www-form-urlencoded"
+            r = await self.client.post(
+                url="/v1/checkout/sessions", headers=headers, content=encoded_data
+            )
+            r.raise_for_status()
+            data = r.json()
+
+            session_id = data.get("id")
+            if not session_id:
+                return FiatInvoiceResponse(
+                    ok=False, error_message="Server error: 'missing session id'"
+                )
+            payment_request = data.get("url")
+            if not payment_request:
+                return FiatInvoiceResponse(
+                    ok=False, error_message="Server error: 'missing payment URL'"
+                )
+
+            return FiatInvoiceResponse(
+                ok=True, checking_id=session_id, payment_request=payment_request
+            )
+        except json.JSONDecodeError:
+            return FiatInvoiceResponse(
+                ok=False, error_message="Server error: 'invalid json response'"
+            )
+        except Exception as exc:
+            logger.warning(exc)
+            return FiatInvoiceResponse(
+                ok=False, error_message=f"Unable to connect to {self.endpoint}."
+            )
+
+    async def pay_invoice(self, payment_request: str) -> FiatPaymentResponse:
+        raise NotImplementedError("Stripe does not support paying invoices directly.")
+
+    async def get_invoice_status(self, checking_id: str) -> FiatPaymentStatus:
+        try:
+            r = await self.client.get(
+                url=f"/v1/checkout/sessions/{checking_id}",
+            )
+            r.raise_for_status()
+
+            data = r.json()
+            payment_status = data.get("payment_status")
+            if not payment_status:
+                return FiatPaymentPendingStatus()
+            if payment_status == "paid":
+                # todo: handle fee
+                return FiatPaymentSuccessStatus()
+
+            expires_at = data.get("expires_at")
+            _24_hours_ago = datetime.now(timezone.utc) - timedelta(hours=24)
+            if expires_at and expires_at < _24_hours_ago.timestamp():
+                # be defensive: add a 24 hour buffer
+                return FiatPaymentFailedStatus()
+
+            return FiatPaymentPendingStatus()
+        except Exception as exc:
+            logger.debug(f"Error getting invoice status: {exc}")
+            return FiatPaymentPendingStatus()
+
+    async def get_payment_status(self, checking_id: str) -> FiatPaymentStatus:
+        raise NotImplementedError("Stripe does not support outgoing payments.")
+
+    async def paid_invoices_stream(self) -> AsyncGenerator[str, None]:
+        logger.warning(
+            "Stripe does not support paid invoices stream. Use webhooks instead."
+        )
+        mock_queue: asyncio.Queue[str] = asyncio.Queue(0)
+        while settings.lnbits_running:
+            value = await mock_queue.get()
+            yield value
+
+    def _settings_connection_fields(self) -> str:
+        return "-".join(
+            [str(settings.stripe_api_endpoint), str(settings.stripe_api_secret_key)]
+        )

lnbits/helpers.py

@@ -363,3 +363,14 @@ def safe_upload_file_path(filename: str, directory: str = "images") -> Path:
     # Prevent filename with subdirectories
     file_path = image_folder / filename.split("/")[-1]
     return file_path.resolve()
+
+
+def normalize_endpoint(endpoint: str, add_proto=True) -> str:
+    endpoint = endpoint[:-1] if endpoint.endswith("/") else endpoint
+    if add_proto:
+        if endpoint.startswith("ws://") or endpoint.startswith("wss://"):
+            return endpoint
+        endpoint = (
+            f"https://{endpoint}" if not endpoint.startswith("http") else endpoint
+        )
+    return endpoint

lnbits/settings.py

@@ -565,6 +565,34 @@ class StrikeFundingSource(LNbitsSettings):
     strike_api_key: str | None = Field(default=None, env="STRIKE_API_KEY")
 
 
+class FiatProviderLimits(BaseModel):
+    # empty list means all users are allowed to receive payments via Stripe
+    allowed_users: list[str] = Field(default=[])
+
+    service_max_fee_sats: int = Field(default=0)
+    service_fee_percent: float = Field(default=0)
+    service_fee_wallet_id: str | None = Field(default=None)
+
+    service_min_amount_sats: int = Field(default=0)
+    service_max_amount_sats: int = Field(default=0)
+    service_faucet_wallet_id: str | None = Field(default="")
+
+
+class StripeFiatProvider(LNbitsSettings):
+    stripe_enabled: bool = Field(default=False)
+    stripe_api_endpoint: str = Field(default="https://api.stripe.com")
+    stripe_api_secret_key: str | None = Field(default=None)
+    stripe_payment_success_url: str = Field(default="https://lnbits.com")
+
+    stripe_payment_webhook_url: str = Field(
+        default="https://your-lnbits-domain-here.com/api/v1/callback/stripe"
+    )
+    # Use this secret to verify that events come from Stripe.
+    stripe_webhook_signing_secret: str | None = Field(default=None)
+
+    stripe_limits: FiatProviderLimits = Field(default_factory=FiatProviderLimits)
+
+
 class LightningSettings(LNbitsSettings):
     lightning_invoice_expiry: int = Field(default=3600, gt=0)
 
@@ -597,6 +625,40 @@ class FundingSourcesSettings(
     lnbits_funding_source_pay_invoice_wait_seconds: int = Field(default=5, ge=0)
 
 
+class FiatProvidersSettings(StripeFiatProvider):
+
+    def is_fiat_provider_enabled(self, provider: str | None) -> bool:
+        """
+        Checks if a specific fiat provider is enabled.
+        """
+        if not provider:
+            return False
+        if provider == "stripe":
+            return self.stripe_enabled
+        # Add checks for other fiat providers here as needed
+        return False
+
+    def get_fiat_providers_for_user(self, user_id: str) -> list[str]:
+        """
+        Returns a list of fiat payment methods allowed for the user.
+        """
+        allowed_providers = []
+        if self.stripe_enabled and (
+            not self.stripe_limits.allowed_users
+            or user_id in self.stripe_limits.allowed_users
+        ):
+            allowed_providers.append("stripe")
+
+        # Add other fiat providers here as needed
+        return allowed_providers
+
+    def get_fiat_provider_limits(self, provider_name: str) -> FiatProviderLimits | None:
+        """
+        Returns the limits for a specific fiat provider.
+        """
+        return getattr(self, provider_name + "_limits", None)
+
+
 class WebPushSettings(LNbitsSettings):
     lnbits_webpush_pubkey: str | None = Field(default=None)
     lnbits_webpush_privkey: str | None = Field(default=None)
@@ -769,6 +831,7 @@ class EditableSettings(
     SecuritySettings,
     NotificationsSettings,
     FundingSourcesSettings,
+    FiatProvidersSettings,
     LightningSettings,
     WebPushSettings,
     NodeUISettings,

lnbits/static/i18n/en.js

@@ -22,6 +22,7 @@ window.localisation.en = {
   active_channels: 'Active Channels',
   connect_peer: 'Connect Peer',
   connect: 'Connect',
+  reconnect: 'Reconnect',
   open_channel: 'Open Channel',
   open: 'Open',
   close_channel: 'Close Channel',
@@ -60,6 +61,7 @@ window.localisation.en = {
   rename_wallet: 'Rename wallet',
   update_name: 'Update name',
   fiat_tracking: 'Fiat tracking',
+  fiat_providers: 'Fiat providers',
   currency: 'Currency',
   update_currency: 'Update currency',
   press_to_claim: 'Press to claim bitcoin',
@@ -141,6 +143,7 @@ window.localisation.en = {
   uninstall: 'Uninstall',
   drop_db: 'Remove Data',
   enable: 'Enable',
+  enabled: 'Enabled',
   pay_to_enable: 'Pay To Enable',
   enable_extension_details: 'Enable extension for current user',
   disable: 'Disable',
@@ -171,12 +174,33 @@ window.localisation.en = {
   payment_hash: 'Payment Hash',
   fee: 'Fee',
   amount: 'Amount',
+  amount_limits: 'Amount Limits',
   amount_sats: 'Amount (sats)',
+  faucest_wallet: 'Faucet Wallet',
+  faucest_wallet_desc_1:
+    'Each time a payment is confirmed by the {provider} provider funds will be subtracted from this wallet.',
+  faucest_wallet_desc_2:
+    'This helps monitor all {provider} payments and their status.',
+  faucest_wallet_desc_3:
+    'This wallet must be topped up with the amount of sats that the admin is willing to offer in exchange for the fiat currency.',
+  faucest_wallet_desc_4:
+    'If this wallet is configured, but is empty, the {provider} payments will not be processed.',
+  faucest_wallet_desc_5:
+    'This wallet can eventually get to a negative balance if parallel fiat payments are made.',
+  faucest_wallet_id: 'Faucet Wallet ID (optional)',
+  faucest_wallet_id_hint:
+    'Wallet ID to use for the faucet. It will be used to send the funds to the user.',
   tag: 'Tag',
   unit: 'Unit',
   description: 'Description',
   expiry: 'Expiry',
   webhook: 'Webhook',
+  webhook_url: 'Webhook URL',
+  webhook_url_hint:
+    'Webhook URL to send the payment details to. It will be called when the payment is completed.',
+  webhook_events_list: 'The following events must be supported by the webhook:',
+  webhook_stripe_description:
+    'One the stripe side you must configure a webhook with a URL that points to your LNbits server.',
   payment_proof: 'Payment Proof',
   update: 'Update',
   update_available: 'Update {version} available!',
@@ -357,6 +381,8 @@ window.localisation.en = {
   back: 'Back',
   logout: 'Logout',
   look_and_feel: 'Look and Feel',
+  endpoint: 'Endpoint',
+  api: 'API',
   api_token: 'API Token',
   api_tokens: 'API Tokens',
   access_control_list: 'Access Control List',
@@ -374,6 +400,8 @@ window.localisation.en = {
   extension_paid_sats: 'You have already paid {paid_sats} sats.',
   release_details_error: 'Cannot get the release details.',
   pay_from_wallet: 'Pay from Wallet',
+  pay_with: 'Pay with {provider}',
+  select_payment_provider: 'Select payment provider',
   wallet_required: 'Wallet *',
   show_qr: 'Show QR',
   retry_install: 'Retry Install',
@@ -386,6 +414,9 @@ window.localisation.en = {
     'The {name} extension requires a payment of minimum {amount} sats to enable.',
   hide_empty_wallets: 'Hide empty wallets',
   recheck: 'Recheck',
+  check: 'Check',
+  check_connection: 'Check Connection',
+  check_webhook: 'Check Webhook',
   contributors: 'Contributors',
   license: 'License',
   reset_key: 'Reset Key',
@@ -492,7 +523,9 @@ window.localisation.en = {
   allowed_currencies_hint: 'Limit the number of available fiat currencies',
   default_account_currency: 'Default Account Currency',
   default_account_currency_hint: 'Default currency for accounting',
-
+  min_incoming_payment_amount: 'Min Incoming Payment Amount',
+  min_incoming_payment_amount_desc:
+    'Minimum amount allowed for generating an invoice',
   max_incoming_payment_amount: 'Max Incoming Payment Amount',
   max_incoming_payment_amount_desc:
     'Maximum amount allowed for generating an invoice',
@@ -554,6 +587,7 @@ window.localisation.en = {
   admin_users_label: 'User ID',
   allowed_users: 'Allowed Users',
   allowed_users_hint: 'Only these users can use LNbits',
+  allowed_users_hint_feature: 'Only these users can use {feature}',
   allowed_users_label: 'User ID',
   allow_creation_user: 'Allow creation of new users',
   allow_creation_user_desc: 'Allow creation of new users on the index page',
@@ -588,5 +622,12 @@ window.localisation.en = {
   view_column: 'View wallets as rows',
   filter_payments: 'Filter payments',
   filter_date: 'Filter by date',
-  websocket_example: 'Websocket example'
+  websocket_example: 'Websocket example',
+  secret_key: 'Secret Key',
+  signing_secret: 'Signing Secret',
+  signing_secret_hint:
+    'Signing secret for the webhook. Messages will be signed with this secret.',
+  callback_success_url: 'Callback Success URL',
+  callback_success_url_hint:
+    'The user will be redirected to this URL after the payment is successful'
 }

lnbits/static/js/admin.js

@@ -54,6 +54,7 @@ window.AdminPageLogic = {
       chartReady: false,
       formAddAdmin: '',
       formAddUser: '',
+      formAddStripeUser: '',
       hideInputToggle: true,
       formAddExtensionsManifest: '',
       nostrNotificationIdentifier: '',
@@ -187,6 +188,23 @@ window.AdminPageLogic = {
       let allowed_users = this.formData.lnbits_allowed_users
       this.formData.lnbits_allowed_users = allowed_users.filter(u => u !== user)
     },
+    addStripeAllowedUser() {
+      const addUser = this.formAddStripeUser || ''
+      if (
+        addUser.length &&
+        !this.formData.stripe_limits.allowed_users.includes(addUser)
+      ) {
+        this.formData.stripe_limits.allowed_users = [
+          ...this.formData.stripe_limits.allowed_users,
+          addUser
+        ]
+        this.formAddStripeUser = ''
+      }
+    },
+    removeStripeAllowedUser(user) {
+      this.formData.stripe_limits.allowed_users =
+        this.formData.stripe_limits.allowed_users.filter(u => u !== user)
+    },
     addIncludePath() {
       if (!this.formAddIncludePath) {
         return
@@ -613,6 +631,20 @@ window.AdminPageLogic = {
             .catch(LNbits.utils.notifyApiError)
         })
     },
+    checkFiatProvider(providerName) {
+      LNbits.api
+        .request('PUT', `/api/v1/fiat/check/${providerName}`)
+        .then(response => {
+          response
+          const data = response.data
+          Quasar.Notify.create({
+            type: data.success ? 'positive' : 'warning',
+            message: data.message,
+            icon: null
+          })
+        })
+        .catch(LNbits.utils.notifyApiError)
+    },
     downloadBackup() {
       window.open('/admin/api/v1/backup', '_blank')
     },

lnbits/static/js/base.js

@@ -19,14 +19,16 @@ window.LNbits = {
       amount,
       memo,
       unit = 'sat',
-      lnurlCallback = null
+      lnurlCallback = null,
+      fiatProvider = null
     ) {
       return this.request('post', '/api/v1/payments', wallet.inkey, {
         out: false,
         amount: amount,
         memo: memo,
         lnurl_callback: lnurlCallback,
-        unit: unit
+        unit: unit,
+        fiat_provider: fiatProvider
       })
     },
     payInvoice(wallet, bolt11) {
@@ -197,6 +199,7 @@ window.LNbits = {
         email: data.email,
         extensions: data.extensions,
         wallets: data.wallets,
+        fiat_providers: data.fiat_providers || [],
         super_user: data.super_user,
         extra: data.extra ?? {}
       }

lnbits/static/js/wallet.js

@@ -35,6 +35,7 @@ window.WalletPageLogic = {
         lnurl: null,
         units: ['sat'],
         unit: 'sat',
+        fiatProvider: '',
         data: {
           amount: null,
           memo: ''
@@ -253,12 +254,15 @@ window.WalletPageLogic = {
           this.receive.data.amount,
           this.receive.data.memo,
           this.receive.unit,
-          this.receive.lnurl && this.receive.lnurl.callback
+          this.receive.lnurl && this.receive.lnurl.callback,
+          this.receive.fiatProvider
         )
         .then(response => {
           this.g.updatePayments = !this.g.updatePayments
           this.receive.status = 'success'
           this.receive.paymentReq = response.data.bolt11
+          this.receive.fiatPaymentReq =
+            response.data.extra?.fiat_payment_request
           this.receive.amountMsat = response.data.amount
           this.receive.paymentHash = response.data.payment_hash
           if (!this.receive.lnurl) {
@@ -820,6 +824,9 @@ window.WalletPageLogic = {
     },
     swapBalancePriority() {
       this.isFiatPriority = !this.isFiatPriority
+      this.receive.unit = this.isFiatPriority
+        ? this.g.wallet.currency || 'sat'
+        : 'sat'
       this.$q.localStorage.setItem('lnbits.isFiatPriority', this.isFiatPriority)
     },
     handleFiatTracking() {

lnbits/tasks.py

@@ -18,6 +18,7 @@ from lnbits.core.crud import (
     update_payment,
 )
 from lnbits.core.models import Payment, PaymentState
+from lnbits.core.services.payments import handle_fiat_payment_confirmation
 from lnbits.settings import settings
 from lnbits.wallets import get_funding_source
 
@@ -200,13 +201,21 @@ async def invoice_callback_dispatcher(checking_id: str, is_internal: bool = Fals
     invoice_listeners from core and extensions.
     """
     payment = await get_standalone_payment(checking_id, incoming=True)
-    if payment and payment.is_in:
-        status = await payment.check_status()
-        payment.fee = status.fee_msat or 0
+    if not payment:
+        logger.warning(f"No payment found for '{checking_id}'.")
+        return
+    if not payment.is_in:
+        logger.warning(f"Payment '{checking_id}' is not incoming, skipping.")
+        return
+
+    status = await payment.check_status(skip_internal_payment_notifications=True)
+    payment.fee = status.fee_msat or payment.fee
     # only overwrite preimage if status.preimage provides it
     payment.preimage = status.preimage or payment.preimage
     payment.status = PaymentState.SUCCESS
     await update_payment(payment)
+    if payment.fiat_provider:
+        await handle_fiat_payment_confirmation(payment)
     internal = "internal" if is_internal else ""
     logger.success(f"{internal} invoice {checking_id} settled")
     for name, send_chan in invoice_listeners.items():

lnbits/templates/components.vue

@@ -998,12 +998,24 @@
                 v-if="props.row.isIn && props.row.isPending && props.row.bolt11"
                 class="text-center q-my-lg"
               >
+                <div v-if="props.row.extra.fiat_payment_request">
+                  <a
+                    :href="props.row.extra.fiat_payment_request"
+                    target="_blank"
+                  >
+                    <lnbits-qrcode
+                      :value="props.row.extra.fiat_payment_request"
+                    ></lnbits-qrcode>
+                  </a>
+                </div>
+                <div v-else>
                   <a :href="'lightning:' + props.row.bolt11">
                     <lnbits-qrcode
                       :value="'lightning:' + props.row.bolt11.toUpperCase()"
                     ></lnbits-qrcode>
                   </a>
                 </div>
+              </div>
             </q-card-section>
             <q-card-section>
               <div class="row q-gutter-x-sm">
@@ -1013,7 +1025,11 @@
                   "
                   outline
                   color="grey"
-                  @click="copyText(props.row.bolt11)"
+                  @click="
+                    copyText(
+                      props.row.extra.fiat_payment_request || props.row.bolt11
+                    )
+                  "
                   :label="$t('copy_invoice')"
                 ></q-btn>
                 <q-btn

lnbits/wallets/alby.py

@@ -6,6 +6,7 @@ from typing import AsyncGenerator, Optional
 import httpx
 from loguru import logger
 
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 
 from .base import (
@@ -27,7 +28,7 @@ class AlbyWallet(Wallet):
         if not settings.alby_access_token:
             raise ValueError("cannot initialize AlbyWallet: missing alby_access_token")
 
-        self.endpoint = self.normalize_endpoint(settings.alby_api_endpoint)
+        self.endpoint = normalize_endpoint(settings.alby_api_endpoint)
         self.auth = {
             "Authorization": "Bearer " + settings.alby_access_token,
             "User-Agent": settings.user_agent,

lnbits/wallets/base.py

@@ -150,17 +150,3 @@ class Wallet(ABC):
                 except Exception as exc:
                     logger.error(f"could not get status of invoice {invoice}: '{exc}' ")
             await asyncio.sleep(5)
-
-    def normalize_endpoint(self, endpoint: str, add_proto=True) -> str:
-        endpoint = endpoint[:-1] if endpoint.endswith("/") else endpoint
-        if add_proto:
-            if endpoint.startswith("ws://") or endpoint.startswith("wss://"):
-                return endpoint
-            endpoint = (
-                f"https://{endpoint}" if not endpoint.startswith("http") else endpoint
-            )
-        return endpoint
-
-
-class UnsupportedError(Exception):
-    pass

lnbits/wallets/blink.py

@@ -10,6 +10,7 @@ from websockets.client import WebSocketClientProtocol, connect
 from websockets.typing import Subprotocol
 
 from lnbits import bolt11
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 
 from .base import (
@@ -34,13 +35,13 @@ class BlinkWallet(Wallet):
         if not settings.blink_token:
             raise ValueError("cannot initialize BlinkWallet: missing blink_token")
 
-        self.endpoint = self.normalize_endpoint(settings.blink_api_endpoint)
+        self.endpoint = normalize_endpoint(settings.blink_api_endpoint)
 
         self.auth = {
             "X-API-KEY": settings.blink_token,
             "User-Agent": settings.user_agent,
         }
-        self.ws_endpoint = self.normalize_endpoint(settings.blink_ws_endpoint)
+        self.ws_endpoint = normalize_endpoint(settings.blink_ws_endpoint)
         self.ws_auth = {
             "type": "connection_init",
             "payload": {"X-API-KEY": settings.blink_token},

lnbits/wallets/boltz.py

@@ -5,6 +5,7 @@ from bolt11.decode import decode
 from grpc.aio import AioRpcError
 from loguru import logger
 
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 from lnbits.wallets.boltz_grpc_files import boltzrpc_pb2, boltzrpc_pb2_grpc
 from lnbits.wallets.lnd_grpc_files.lightning_pb2_grpc import grpc
@@ -42,7 +43,7 @@ class BoltzWallet(Wallet):
                 "cannot initialize BoltzWallet: missing boltz_client_wallet"
             )
 
-        self.endpoint = self.normalize_endpoint(
+        self.endpoint = normalize_endpoint(
             settings.boltz_client_endpoint, add_proto=True
         )
 

lnbits/wallets/breez.py

@@ -1,5 +1,7 @@
 import base64
 
+from lnbits.exceptions import UnsupportedError
+
 try:
     import breez_sdk  # type: ignore
 
@@ -34,7 +36,6 @@ else:
         PaymentStatus,
         PaymentSuccessStatus,
         StatusResponse,
-        UnsupportedError,
         Wallet,
     )
 

lnbits/wallets/cliche.py

@@ -6,6 +6,7 @@ from typing import AsyncGenerator, Optional
 from loguru import logger
 from websocket import create_connection
 
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 
 from .base import (
@@ -25,7 +26,7 @@ class ClicheWallet(Wallet):
         if not settings.cliche_endpoint:
             raise ValueError("cannot initialize ClicheWallet: missing cliche_endpoint")
 
-        self.endpoint = self.normalize_endpoint(settings.cliche_endpoint)
+        self.endpoint = normalize_endpoint(settings.cliche_endpoint)
 
     async def cleanup(self):
         pass

lnbits/wallets/corelightning.py

@@ -8,6 +8,7 @@ from bolt11.exceptions import Bolt11Exception
 from loguru import logger
 from pyln.client import LightningRpc, RpcError
 
+from lnbits.exceptions import UnsupportedError
 from lnbits.nodes.cln import CoreLightningNode
 from lnbits.settings import settings
 from lnbits.utils.crypto import random_secret_and_hash
@@ -20,7 +21,6 @@ from .base import (
     PaymentStatus,
     PaymentSuccessStatus,
     StatusResponse,
-    UnsupportedError,
     Wallet,
 )
 

lnbits/wallets/corelightningrest.py

@@ -9,6 +9,8 @@ from bolt11 import Bolt11Exception
 from bolt11.decode import decode
 from loguru import logger
 
+from lnbits.exceptions import UnsupportedError
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 from lnbits.utils.crypto import random_secret_and_hash
 
@@ -18,7 +20,6 @@ from .base import (
     PaymentResponse,
     PaymentStatus,
     StatusResponse,
-    UnsupportedError,
     Wallet,
 )
 from .macaroon import load_macaroon
@@ -43,7 +44,7 @@ class CoreLightningRestWallet(Wallet):
                 "invalid corelightning_rest_macaroon provided"
             )
 
-        self.url = self.normalize_endpoint(settings.corelightning_rest_url)
+        self.url = normalize_endpoint(settings.corelightning_rest_url)
         headers = {
             "macaroon": macaroon,
             "encodingtype": "hex",

lnbits/wallets/eclair.py

@@ -11,6 +11,7 @@ import httpx
 from loguru import logger
 from websockets.client import connect
 
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 from lnbits.utils.crypto import random_secret_and_hash
 
@@ -39,7 +40,7 @@ class EclairWallet(Wallet):
         if not settings.eclair_pass:
             raise ValueError("cannot initialize EclairWallet: missing eclair_pass")
 
-        self.url = self.normalize_endpoint(settings.eclair_url)
+        self.url = normalize_endpoint(settings.eclair_url)
         self.ws_url = f"ws://{urllib.parse.urlsplit(self.url).netloc}/ws"
 
         password = settings.eclair_pass

lnbits/wallets/lnbits.py

@@ -6,6 +6,7 @@ import httpx
 from loguru import logger
 from websockets.client import connect
 
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 
 from .base import (
@@ -36,7 +37,7 @@ class LNbitsWallet(Wallet):
                 "cannot initialize LNbitsWallet: "
                 "missing lnbits_key or lnbits_admin_key or lnbits_invoice_key"
             )
-        self.endpoint = self.normalize_endpoint(settings.lnbits_endpoint)
+        self.endpoint = normalize_endpoint(settings.lnbits_endpoint)
         self.ws_url = f"{self.endpoint.replace('http', 'ws', 1)}/api/v1/ws/{key}"
         self.headers = {"X-Api-Key": key, "User-Agent": settings.user_agent}
         self.client = httpx.AsyncClient(base_url=self.endpoint, headers=self.headers)

lnbits/wallets/lndgrpc.py

@@ -11,6 +11,7 @@ import lnbits.wallets.lnd_grpc_files.lightning_pb2 as ln
 import lnbits.wallets.lnd_grpc_files.lightning_pb2_grpc as lnrpc
 import lnbits.wallets.lnd_grpc_files.router_pb2 as router
 import lnbits.wallets.lnd_grpc_files.router_pb2_grpc as routerrpc
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 from lnbits.utils.crypto import random_secret_and_hash
 
@@ -72,9 +73,7 @@ class LndWallet(Wallet):
                 "cannot initialize LndWallet: missing lnd_grpc_cert or lnd_cert"
             )
 
-        self.endpoint = self.normalize_endpoint(
-            settings.lnd_grpc_endpoint, add_proto=False
-        )
+        self.endpoint = normalize_endpoint(settings.lnd_grpc_endpoint, add_proto=False)
         self.port = int(settings.lnd_grpc_port)
 
         macaroon = (

lnbits/wallets/lndrest.py

@@ -7,6 +7,7 @@ from typing import Any, AsyncGenerator, Dict, Optional
 import httpx
 from loguru import logger
 
+from lnbits.helpers import normalize_endpoint
 from lnbits.nodes.lndrest import LndRestNode
 from lnbits.settings import settings
 from lnbits.utils.crypto import random_secret_and_hash
@@ -41,7 +42,7 @@ class LndRestWallet(Wallet):
                 "This only works if you have a publicly issued certificate."
             )
 
-        self.endpoint = self.normalize_endpoint(settings.lnd_rest_endpoint)
+        self.endpoint = normalize_endpoint(settings.lnd_rest_endpoint)
 
         # if no cert provided it should be public so we set verify to True
         # and it will still check for validity of certificate and fail if its not valid

lnbits/wallets/lnpay.py

@@ -5,6 +5,7 @@ from typing import AsyncGenerator, Dict, Optional
 import httpx
 from loguru import logger
 
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 
 from .base import (
@@ -36,7 +37,7 @@ class LNPayWallet(Wallet):
                 "missing lnpay_wallet_key or lnpay_admin_key"
             )
         self.wallet_key = wallet_key
-        self.endpoint = self.normalize_endpoint(settings.lnpay_api_endpoint)
+        self.endpoint = normalize_endpoint(settings.lnpay_api_endpoint)
 
         headers = {
             "X-Api-Key": settings.lnpay_api_key,

lnbits/wallets/lntips.py

@@ -7,6 +7,7 @@ from typing import AsyncGenerator, Dict, Optional
 import httpx
 from loguru import logger
 
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 
 from .base import (
@@ -36,7 +37,7 @@ class LnTipsWallet(Wallet):
                 "missing lntips_api_key or lntips_admin_key or lntips_invoice_key"
             )
 
-        self.endpoint = self.normalize_endpoint(settings.lntips_api_endpoint)
+        self.endpoint = normalize_endpoint(settings.lntips_api_endpoint)
 
         headers = {
             "Authorization": f"Basic {key}",

lnbits/wallets/opennode.py

@@ -4,6 +4,8 @@ from typing import AsyncGenerator, Optional
 import httpx
 from loguru import logger
 
+from lnbits.exceptions import UnsupportedError
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 
 from .base import (
@@ -12,7 +14,6 @@ from .base import (
     PaymentResponse,
     PaymentStatus,
     StatusResponse,
-    UnsupportedError,
     Wallet,
 )
 
@@ -38,7 +39,7 @@ class OpenNodeWallet(Wallet):
             )
         self.key = key
 
-        self.endpoint = self.normalize_endpoint(settings.opennode_api_endpoint)
+        self.endpoint = normalize_endpoint(settings.opennode_api_endpoint)
 
         headers = {
             "Authorization": self.key,

lnbits/wallets/phoenixd.py

@@ -9,6 +9,7 @@ import httpx
 from loguru import logger
 from websockets.client import connect
 
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 
 from .base import (
@@ -35,7 +36,7 @@ class PhoenixdWallet(Wallet):
                 "cannot initialize PhoenixdWallet: missing phoenixd_api_password"
             )
 
-        self.endpoint = self.normalize_endpoint(settings.phoenixd_api_endpoint)
+        self.endpoint = normalize_endpoint(settings.phoenixd_api_endpoint)
         parsed_url = urllib.parse.urlparse(settings.phoenixd_api_endpoint)
 
         if parsed_url.scheme == "http":

lnbits/wallets/spark.py

@@ -7,6 +7,7 @@ from typing import AsyncGenerator, Optional
 import httpx
 from loguru import logger
 
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 
 from .base import (
@@ -36,7 +37,7 @@ class SparkWallet(Wallet):
         if not settings.spark_token:
             raise ValueError("cannot initialize SparkWallet: missing spark_token")
 
-        url = self.normalize_endpoint(settings.spark_url)
+        url = normalize_endpoint(settings.spark_url)
         url = url.replace("/rpc", "")
         self.token = settings.spark_token
 

lnbits/wallets/strike.py

@@ -6,6 +6,7 @@ from typing import Any, AsyncGenerator, Dict, Optional
 import httpx
 from loguru import logger
 
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 
 from .base import (
@@ -94,7 +95,7 @@ class StrikeWallet(Wallet):
         self._general_limiter = TokenBucket(1000, 600)
 
         self.client = httpx.AsyncClient(
-            base_url=self.normalize_endpoint(settings.strike_api_endpoint),
+            base_url=normalize_endpoint(settings.strike_api_endpoint),
             headers={
                 "Authorization": f"Bearer {settings.strike_api_key}",
                 "Content-Type": "application/json",

lnbits/wallets/zbd.py

@@ -6,6 +6,7 @@ import httpx
 from bolt11 import decode as bolt11_decode
 from loguru import logger
 
+from lnbits.helpers import normalize_endpoint
 from lnbits.settings import settings
 
 from .base import (
@@ -27,7 +28,7 @@ class ZBDWallet(Wallet):
         if not settings.zbd_api_key:
             raise ValueError("cannot initialize ZBDWallet: missing zbd_api_key")
 
-        self.endpoint = self.normalize_endpoint(settings.zbd_api_endpoint)
+        self.endpoint = normalize_endpoint(settings.zbd_api_endpoint)
         headers = {
             "apikey": settings.zbd_api_key,
             "User-Agent": settings.user_agent,

tests/api/test_api.py

@@ -8,10 +8,12 @@ from pytest_mock.plugin import MockerFixture
 from lnbits import bolt11
 from lnbits.core.models import CreateInvoice, Payment
 from lnbits.core.views.payment_api import api_payment
+from lnbits.fiat.base import FiatInvoiceResponse
 from lnbits.settings import Settings
 
 from ..helpers import (
     get_random_invoice_data,
+    get_random_string,
 )
 
 
@@ -155,6 +157,60 @@ async def test_create_invoice_fiat_amount(client, inkey_headers_to):
     assert extra["fiat_rate"]
 
 
+@pytest.mark.anyio
+async def test_create_fiat_invoice(
+    client, inkey_headers_to, settings: Settings, mocker: MockerFixture
+):
+    data = await get_random_invoice_data()
+    data["unit"] = "EUR"
+    data["fiat_provider"] = "stripe"
+
+    settings.stripe_enabled = True
+    settings.stripe_api_secret_key = "mock_sk_test_4eC39HqLyjWDarjtT1zdp7dc"
+
+    fiat_payment_request = "https://stripe.com/pay/session_123"
+    fiat_mock_response = FiatInvoiceResponse(
+        ok=True,
+        checking_id=f"session_123_{get_random_string(10)}",
+        payment_request=fiat_payment_request,
+    )
+
+    mocker.patch(
+        "lnbits.fiat.StripeWallet.create_invoice",
+        AsyncMock(return_value=fiat_mock_response),
+    )
+    mocker.patch(
+        "lnbits.utils.exchange_rates.get_fiat_rate_satoshis",
+        AsyncMock(return_value=1000),  # 1 BTC = 100 000 EUR, so 1 EUR = 1000 sats
+    )
+    response = await client.post(
+        "/api/v1/payments", json=data, headers=inkey_headers_to
+    )
+    assert response.status_code == 201
+    invoice = response.json()
+    decode = bolt11.decode(invoice["bolt11"])
+    assert decode.amount_msat == 10_000_000
+    assert decode.payment_hash
+    assert invoice["fiat_provider"] == "stripe"
+    assert invoice["status"] == "pending"
+    assert invoice["extra"]["fiat_checking_id"]
+    assert invoice["extra"]["fiat_payment_request"] == fiat_payment_request
+
+    response = await client.get(
+        f"/api/v1/payments/{decode.payment_hash}", headers=inkey_headers_to
+    )
+    assert response.is_success
+    data = response.json()
+    assert data["status"] == "pending"
+    invoice = data["details"]
+
+    assert invoice["fiat_provider"] == "stripe"
+    assert invoice["status"] == "pending"
+    assert invoice["amount"] == 10_000_000
+    assert invoice["extra"]["fiat_checking_id"]
+    assert invoice["extra"]["fiat_payment_request"] == fiat_payment_request
+
+
 @pytest.mark.anyio
 @pytest.mark.parametrize("currency", ("msat", "RRR"))
 async def test_create_invoice_validates_used_currency(

tests/conftest.py

@@ -19,10 +19,10 @@ from lnbits.core.crud import (
 from lnbits.core.models import Account, CreateInvoice, PaymentState, User
 from lnbits.core.models.users import UpdateSuperuserPassword
 from lnbits.core.services import create_user_account, update_wallet_balance
+from lnbits.core.services.payments import create_wallet_invoice
 from lnbits.core.views.auth_api import first_install
-from lnbits.core.views.payment_api import _api_payments_create_invoice
 from lnbits.db import DB_TYPE, SQLITE, Database
-from lnbits.settings import AuthMethods, Settings
+from lnbits.settings import AuthMethods, FiatProviderLimits, Settings
 from lnbits.settings import settings as lnbits_settings
 from lnbits.wallets.fake import FakeWallet
 from tests.helpers import (
@@ -255,7 +255,7 @@ async def adminkey_headers_to(to_wallet):
 async def invoice(to_wallet):
     data = await get_random_invoice_data()
     invoice_data = CreateInvoice(**data)
-    invoice = await _api_payments_create_invoice(invoice_data, to_wallet)
+    invoice = await create_wallet_invoice(to_wallet.id, invoice_data)
     yield invoice
     del invoice
 
@@ -312,3 +312,4 @@ def _settings_cleanup(settings: Settings):
     settings.lnbits_admin_users = []
     settings.lnbits_max_outgoing_payment_amount_sats = 10_000_000_100
     settings.lnbits_max_incoming_payment_amount_sats = 10_000_000_200
+    settings.stripe_limits = FiatProviderLimits()

tests/unit/test_fiat_providers.py

@@ -0,0 +1,432 @@
+import hashlib
+import hmac
+import time
+from unittest.mock import AsyncMock
+
+import pytest
+from pytest_mock.plugin import MockerFixture
+
+from lnbits.core.crud.payments import get_payments
+from lnbits.core.crud.users import get_user
+from lnbits.core.crud.wallets import create_wallet
+from lnbits.core.models.payments import CreateInvoice, PaymentState
+from lnbits.core.models.users import User
+from lnbits.core.models.wallets import Wallet
+from lnbits.core.services import payments
+from lnbits.core.services.fiat_providers import check_stripe_signature
+from lnbits.core.services.users import create_user_account
+from lnbits.fiat.base import FiatInvoiceResponse, FiatPaymentStatus
+from lnbits.settings import Settings
+from tests.helpers import get_random_string
+
+
+@pytest.mark.anyio
+async def test_create_wallet_fiat_invoice_missing_provider():
+    invoice_data = CreateInvoice(
+        unit="USD", amount=1.0, memo="Test", fiat_provider=None
+    )
+    with pytest.raises(ValueError, match="Fiat provider is required"):
+        await payments.create_fiat_invoice("wallet_id", invoice_data)
+
+
+@pytest.mark.anyio
+async def test_create_wallet_fiat_invoice_provider_not_enabled(settings: Settings):
+    settings.stripe_enabled = False
+    invoice_data = CreateInvoice(
+        unit="USD", amount=1.0, memo="Test", fiat_provider="notarealprovider"
+    )
+    with pytest.raises(
+        ValueError, match="Fiat provider 'notarealprovider' is not enabled"
+    ):
+        await payments.create_fiat_invoice("wallet_id", invoice_data)
+
+
+@pytest.mark.anyio
+async def test_create_wallet_fiat_invoice_with_sat_unit(settings: Settings):
+    settings.stripe_enabled = True
+    invoice_data = CreateInvoice(
+        unit="sat", amount=1.0, memo="Test", fiat_provider="stripe"
+    )
+    with pytest.raises(ValueError, match="Fiat provider cannot be used with satoshis"):
+        await payments.create_fiat_invoice("wallet_id", invoice_data)
+
+
+@pytest.mark.anyio
+async def test_create_wallet_fiat_invoice_allowed_users(
+    to_user: User, settings: Settings
+):
+
+    settings.stripe_enabled = False
+    settings.stripe_limits.allowed_users = []
+    user = await get_user(to_user.id)
+    assert user
+    assert user.fiat_providers == []
+
+    settings.stripe_enabled = True
+    user = await get_user(to_user.id)
+    assert user
+    assert user.fiat_providers == ["stripe"]
+
+    settings.stripe_limits.allowed_users = ["some_other_user_id"]
+    user = await get_user(to_user.id)
+    assert user
+    assert user.fiat_providers == []
+
+    settings.stripe_limits.allowed_users.append(to_user.id)
+    user = await get_user(to_user.id)
+    assert user
+    assert user.fiat_providers == ["stripe"]
+
+    settings.stripe_enabled = False
+    user = await get_user(to_user.id)
+    assert user
+    assert user.fiat_providers == []
+
+
+@pytest.mark.anyio
+async def test_create_wallet_fiat_invoice_fiat_limits_fail(
+    to_wallet: Wallet, settings: Settings, mocker: MockerFixture
+):
+
+    settings.stripe_enabled = True
+    settings.stripe_limits.service_min_amount_sats = 0
+    settings.stripe_limits.service_max_amount_sats = 105
+    settings.stripe_limits.service_faucet_wallet_id = None
+    invoice_data = CreateInvoice(
+        unit="USD", amount=1.0, memo="Test", fiat_provider="stripe"
+    )
+
+    mocker.patch(
+        "lnbits.utils.exchange_rates.get_fiat_rate_satoshis",
+        AsyncMock(return_value=1000),  # 1 BTC = 100 000 USD, so 1 USD = 1000 sats
+    )
+    with pytest.raises(ValueError, match="Maximum amount is 105 sats for 'stripe'."):
+        await payments.create_fiat_invoice(to_wallet.id, invoice_data)
+
+    settings.stripe_limits.service_min_amount_sats = 1001
+    settings.stripe_limits.service_max_amount_sats = 10000
+
+    with pytest.raises(ValueError, match="Minimum amount is 1001 sats for 'stripe'."):
+        await payments.create_fiat_invoice(to_wallet.id, invoice_data)
+
+    settings.stripe_limits.service_min_amount_sats = 10
+    settings.stripe_limits.service_max_amount_sats = 10000
+    settings.stripe_limits.service_max_fee_sats = 100
+
+    with pytest.raises(
+        ValueError, match="Fiat provider 'stripe' service fee wallet missing."
+    ):
+        await payments.create_fiat_invoice(to_wallet.id, invoice_data)
+
+    settings.stripe_limits.service_fee_wallet_id = "not_a_real_wallet_id"
+
+    with pytest.raises(
+        ValueError, match="Fiat provider 'stripe' service fee wallet not found."
+    ):
+        await payments.create_fiat_invoice(to_wallet.id, invoice_data)
+
+    settings.stripe_limits.service_fee_wallet_id = to_wallet.id
+    settings.stripe_limits.service_faucet_wallet_id = "not_a_real_wallet_id"
+
+    with pytest.raises(
+        ValueError, match="Fiat provider 'stripe' faucet wallet not found."
+    ):
+        await payments.create_fiat_invoice(to_wallet.id, invoice_data)
+
+    user = await create_user_account()
+    wallet = await create_wallet(user_id=user.id)
+    settings.stripe_limits.service_faucet_wallet_id = wallet.id
+
+    with pytest.raises(
+        ValueError, match="The amount exceeds the 'stripe'faucet wallet balance."
+    ):
+        await payments.create_fiat_invoice(to_wallet.id, invoice_data)
+
+
+@pytest.mark.anyio
+async def test_create_wallet_fiat_provider_fails(
+    settings: Settings, mocker: MockerFixture
+):
+    settings.stripe_enabled = True
+    settings.stripe_api_secret_key = "mock_sk_test_4eC39HqLyjWDarjtT1zdp7dc"
+    invoice_data = CreateInvoice(
+        unit="USD", amount=2.0, memo="Test", fiat_provider="stripe"
+    )
+
+    fiat_mock_response = FiatInvoiceResponse(
+        ok=False,
+        error_message="Failed to create invoice",
+    )
+
+    mocker.patch(
+        "lnbits.fiat.StripeWallet.create_invoice",
+        AsyncMock(return_value=fiat_mock_response),
+    )
+    mocker.patch(
+        "lnbits.utils.exchange_rates.get_fiat_rate_satoshis",
+        AsyncMock(return_value=1000),  # 1 BTC = 100 000 USD, so 1 USD = 1000 sats
+    )
+
+    user = await create_user_account()
+    wallet = await create_wallet(user_id=user.id)
+    with pytest.raises(ValueError, match="Cannot create payment request for 'stripe'."):
+        await payments.create_fiat_invoice(wallet.id, invoice_data)
+
+    wallet_payments = await get_payments(wallet_id=wallet.id)
+    assert len(wallet_payments) == 1
+    assert wallet_payments[0].status == PaymentState.FAILED
+    assert wallet_payments[0].amount == 2000000
+    assert wallet_payments[0].fee == 0
+
+
+@pytest.mark.anyio
+async def test_create_wallet_fiat_invoice_success(
+    to_wallet: Wallet, settings: Settings, mocker: MockerFixture
+):
+    settings.stripe_enabled = True
+    settings.stripe_api_secret_key = "mock_sk_test_4eC39HqLyjWDarjtT1zdp7dc"
+    settings.stripe_limits.service_min_amount_sats = 0
+    settings.stripe_limits.service_max_amount_sats = 0
+    settings.stripe_limits.service_faucet_wallet_id = None
+
+    invoice_data = CreateInvoice(
+        unit="USD", amount=1.0, memo="Test", fiat_provider="stripe"
+    )
+    fiat_mock_response = FiatInvoiceResponse(
+        ok=True,
+        checking_id=f"session_123_{get_random_string(10)}",
+        payment_request="https://stripe.com/pay/session_123",
+    )
+
+    mocker.patch(
+        "lnbits.fiat.StripeWallet.create_invoice",
+        AsyncMock(return_value=fiat_mock_response),
+    )
+    mocker.patch(
+        "lnbits.utils.exchange_rates.get_fiat_rate_satoshis",
+        AsyncMock(return_value=1000),  # 1 BTC = 100 000 USD, so 1 USD = 1000 sats
+    )
+    payment = await payments.create_fiat_invoice(to_wallet.id, invoice_data)
+    assert payment.status == PaymentState.PENDING
+    assert payment.amount == 1000_000
+    assert payment.fiat_provider == "stripe"
+    assert payment.extra.get("fiat_checking_id") == fiat_mock_response.checking_id
+    assert (
+        payment.extra.get("fiat_payment_request")
+        == "https://stripe.com/pay/session_123"
+    )
+    assert payment.checking_id.startswith("fiat_stripe_")
+    assert payment.fee <= 0
+
+    status = await payment.check_status()
+    assert status.success is False
+    assert status.pending is True
+
+    fiat_mock_status = FiatPaymentStatus(paid=True, fee=123)
+    mocker.patch(
+        "lnbits.fiat.StripeWallet.get_invoice_status",
+        AsyncMock(return_value=fiat_mock_status),
+    )
+    status = await payment.check_status()
+    assert status.paid is True
+    assert status.success is True
+
+
+@pytest.mark.anyio
+async def test_fiat_service_fee(settings: Settings):
+    # settings.stripe_limits.service_min_amount_sats = 0
+    amount_msats = 100_000
+    fee = payments.service_fee_fiat(amount_msats, "no_such_fiat_provider")
+    assert fee == 0
+
+    settings.stripe_limits.service_fee_wallet_id = None
+    fee = payments.service_fee_fiat(amount_msats, "stripe")
+    assert fee == 0
+
+    settings.stripe_limits.service_fee_wallet_id = "wallet_id"
+    fee = payments.service_fee_fiat(amount_msats, "stripe")
+    assert fee == 0
+
+    settings.stripe_limits.service_max_fee_sats = 5
+    settings.stripe_limits.service_fee_percent = 20
+    fee = payments.service_fee_fiat(amount_msats, "stripe")
+    assert fee == 5000
+
+    fee = payments.service_fee_fiat(-amount_msats, "stripe")
+    assert fee == 5000
+
+    settings.stripe_limits.service_max_fee_sats = 5
+    settings.stripe_limits.service_fee_percent = 3
+    fee = payments.service_fee_fiat(amount_msats, "stripe")
+    assert fee == 3000
+
+    fee = payments.service_fee_fiat(-amount_msats, "stripe")
+    assert fee == 3000
+
+
+@pytest.mark.anyio
+async def test_handle_fiat_payment_confirmation(
+    to_wallet: Wallet, settings: Settings, mocker: MockerFixture
+):
+    user = await create_user_account()
+    service_fee_wallet = await create_wallet(user_id=user.id)
+    faucet_wallet = await create_wallet(user_id=user.id)
+    await payments.update_wallet_balance(wallet=faucet_wallet, amount=100_000_000)
+
+    settings.stripe_api_secret_key = "mock_sk_test_4eC39HqLyjWDarjtT1zdp7dc"
+    invoice_data = CreateInvoice(
+        unit="USD", amount=1.0, memo="Test", fiat_provider="stripe"
+    )
+
+    settings.stripe_enabled = True
+    settings.stripe_limits.service_min_amount_sats = 0
+    settings.stripe_limits.service_max_amount_sats = 0
+
+    settings.stripe_limits.service_fee_percent = 20
+    settings.stripe_limits.service_fee_wallet_id = service_fee_wallet.id
+    settings.stripe_limits.service_faucet_wallet_id = faucet_wallet.id
+
+    fiat_mock_response = FiatInvoiceResponse(
+        ok=True,
+        checking_id=f"session_1000_{get_random_string(10)}",
+        payment_request="https://stripe.com/pay/session_1000",
+    )
+
+    mocker.patch(
+        "lnbits.fiat.StripeWallet.create_invoice",
+        AsyncMock(return_value=fiat_mock_response),
+    )
+    mocker.patch(
+        "lnbits.utils.exchange_rates.get_fiat_rate_satoshis",
+        AsyncMock(return_value=10000),  # 1 BTC = 100 000 USD, so 1 USD = 1000 sats
+    )
+    payment = await payments.create_fiat_invoice(to_wallet.id, invoice_data)
+    assert payment.status == PaymentState.PENDING
+    assert payment.amount == 10_000_000
+
+    await payments.handle_fiat_payment_confirmation(payment)
+    # await asyncio.sleep(1)  # Simulate async delay
+
+    service_fee_payments = await get_payments(wallet_id=service_fee_wallet.id)
+    assert len(service_fee_payments) == 1
+    assert service_fee_payments[0].amount == 2_000_000
+    assert service_fee_payments[0].fee == 0
+    assert service_fee_payments[0].status == PaymentState.SUCCESS
+    assert service_fee_payments[0].fiat_provider is None
+
+    faucet_wallet_payments = await get_payments(wallet_id=faucet_wallet.id)
+
+    # Background tasks may create more payments, so we check for at least 2
+    # One for the service fee, one for the top-up)
+    assert len(faucet_wallet_payments) >= 2
+    faucet_payment = next(
+        (p for p in faucet_wallet_payments if p.payment_hash == payment.payment_hash),
+        None,
+    )
+    assert faucet_payment
+    assert faucet_payment.amount == -10_000_000
+    assert faucet_payment.fee == 0
+    assert faucet_payment.status == PaymentState.SUCCESS
+    assert faucet_payment.fiat_provider is None
+    assert (
+        faucet_payment.extra.get("fiat_checking_id") == fiat_mock_response.checking_id
+    )
+    assert (
+        faucet_payment.extra.get("fiat_payment_request")
+        == fiat_mock_response.payment_request
+    )
+    assert faucet_payment.checking_id.startswith("internal_fiat_stripe_")
+
+
+@pytest.mark.parametrize("payload", [b'{"id": "evt_test"}', b"{}", b""])
+def test_check_stripe_signature_success(payload):
+    secret = "whsec_testsecret"
+    sig_header, _, _ = _make_stripe_sig_header(payload, secret)
+    # Should not raise
+    check_stripe_signature(payload, sig_header, secret)
+
+
+@pytest.mark.parametrize("payload", [b'{"id": "evt_test"}'])
+def test_check_stripe_signature_missing_header(payload):
+    secret = "whsec_testsecret"
+    with pytest.raises(ValueError, match="Stripe-Signature header is missing"):
+        check_stripe_signature(payload, None, secret)
+
+
+def test_check_stripe_signature_missing_secret():
+    payload = b'{"id": "evt_test"}'
+    sig_header, _, _ = _make_stripe_sig_header(payload, "whsec_testsecret")
+    with pytest.raises(ValueError, match="Stripe webhook cannot be verified"):
+        check_stripe_signature(payload, sig_header, None)
+
+
+def test_check_stripe_signature_invalid_signature():
+    payload = b'{"id": "evt_test"}'
+    secret = "whsec_testsecret"
+    _, timestamp, _ = _make_stripe_sig_header(payload, secret)
+    # Tamper with signature
+    bad_sig_header = f"t={timestamp},v1=deadbeef"
+    with pytest.raises(ValueError, match="Stripe signature verification failed"):
+        check_stripe_signature(payload, bad_sig_header, secret)
+
+
+def test_check_stripe_signature_old_timestamp():
+    payload = b'{"id": "evt_test"}'
+    secret = "whsec_testsecret"
+    old_timestamp = int(time.time()) - 10000  # way outside default tolerance
+    sig_header, _, _ = _make_stripe_sig_header(payload, secret, timestamp=old_timestamp)
+    with pytest.raises(ValueError, match="Timestamp outside tolerance"):
+        check_stripe_signature(payload, sig_header, secret)
+
+
+def test_check_stripe_signature_future_timestamp():
+    payload = b'{"id": "evt_test"}'
+    secret = "whsec_testsecret"
+    future_timestamp = int(time.time()) + 10000
+    sig_header, _, _ = _make_stripe_sig_header(
+        payload, secret, timestamp=future_timestamp
+    )
+    with pytest.raises(ValueError, match="Timestamp outside tolerance"):
+        check_stripe_signature(payload, sig_header, secret)
+
+
+def test_check_stripe_signature_malformed_header():
+    payload = b'{"id": "evt_test"}'
+    secret = "whsec_testsecret"
+    # Missing v1 part
+    bad_header = "t=1234567890"
+    with pytest.raises(Exception):  # noqa: B017
+        check_stripe_signature(payload, bad_header, secret)
+    # Missing t part
+    bad_header2 = "v1=abcdef"
+    with pytest.raises(Exception):  # noqa: B017
+        check_stripe_signature(payload, bad_header2, secret)
+    # Not split by =
+    bad_header3 = "t1234567890,v1abcdef"
+    with pytest.raises(Exception):  # noqa: B017
+        check_stripe_signature(payload, bad_header3, secret)
+
+
+def test_check_stripe_signature_non_utf8_payload():
+    secret = "whsec_testsecret"
+    payload = b"\xff\xfe\xfd"  # not valid utf-8
+    timestamp = int(time.time())
+    # This will raise UnicodeDecodeError inside check_stripe_signature
+    signed_payload = f"{timestamp}." + payload.decode(errors="ignore")
+    signature = hmac.new(
+        secret.encode(), signed_payload.encode(), hashlib.sha256
+    ).hexdigest()
+    sig_header = f"t={timestamp},v1={signature}"
+    with pytest.raises(UnicodeDecodeError):
+        check_stripe_signature(payload, sig_header, secret)
+
+
+# Helper to generate a valid Stripe signature header
+def _make_stripe_sig_header(payload, secret, timestamp=None):
+    if timestamp is None:
+        timestamp = int(time.time())
+    signed_payload = f"{timestamp}.{payload.decode()}"
+    signature = hmac.new(
+        secret.encode(), signed_payload.encode(), hashlib.sha256
+    ).hexdigest()
+    return f"t={timestamp},v1={signature}", timestamp, signature