feat: square integration (#3962)

lnbits/core/crud/payments.py

@@ -292,6 +292,7 @@ async def create_payment(
         tag=extra.get("tag", None),
         extra=extra,
         labels=data.labels or [],
+        external_id=data.external_id,
     )
 
     await (conn or db).insert("apipayments", payment)

lnbits/core/migrations.py

@@ -802,3 +802,16 @@ async def m044_add_activated_to_accounts(db: Connection):
     Used for account activation status.
     """
     await db.execute("ALTER TABLE accounts ADD COLUMN activated BOOLEAN DEFAULT true")
+
+
+async def m045_add_external_id_to_payments(db: Connection):
+    """
+    Adds external_id column to apipayments.
+    Used for external payment references.
+    """
+    await db.execute("ALTER TABLE apipayments ADD COLUMN external_id TEXT")
+    logger.debug("Creating index idx_payments_external_id...")
+    await db.execute("""
+        CREATE INDEX IF NOT EXISTS idx_payments_external_id
+        ON apipayments (external_id);
+        """)

lnbits/core/models/payments.py

@@ -13,6 +13,7 @@ from lnbits.db import FilterModel
 from lnbits.fiat.base import (
     FiatPaymentStatus,
 )
+from lnbits.helpers import is_valid_external_id
 from lnbits.utils.exchange_rates import allowed_currencies
 from lnbits.wallets.base import (
     PaymentStatus,
@@ -53,6 +54,11 @@ class CreatePayment(BaseModel):
     webhook: str | None = None
     fee: int = 0
     labels: list[str] | None = None
+    external_id: str | None = None
+
+    @validator("external_id")
+    def validate_external_id(cls, external_id):
+        return _validate_external_id(external_id)
 
 
 class Payment(BaseModel):
@@ -77,6 +83,11 @@ class Payment(BaseModel):
     updated_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
     labels: list[str] = []
     extra: dict = {}
+    external_id: str | None = None
+
+    @validator("external_id")
+    def validate_external_id(cls, external_id):
+        return _validate_external_id(external_id)
 
     def __init__(self, **data):
         super().__init__(**data)
@@ -151,6 +162,7 @@ class PaymentFilters(FilterModel):
         "status",
         "time",
         "labels",
+        "external_id",
     ]
 
     __sort_fields__ = [
@@ -161,11 +173,13 @@ class PaymentFilters(FilterModel):
         "memo",
         "time",
         "tag",
+        "external_id",
     ]
 
     status: str | None
     tag: str | None
     checking_id: str | None
+    external_id: str | None
     amount: int
     fee: int
     memo: str | None
@@ -249,6 +263,7 @@ class CreateInvoice(BaseModel):
     lnurl_withdraw: LnurlWithdrawResponse | None = None
     fiat_provider: str | None = None
     labels: list[str] = []
+    external_id: str | None = Query(default=None, max_length=256)
 
     @validator("payment_hash")
     def check_hex(cls, v):
@@ -263,6 +278,10 @@ class CreateInvoice(BaseModel):
             raise ValueError("The provided unit is not supported")
         return v
 
+    @validator("external_id")
+    def validate_external_id(cls, external_id):
+        return _validate_external_id(external_id)
+
 
 class PaymentsStatusCount(BaseModel):
     incoming: int = 0
@@ -301,3 +320,12 @@ class CancelInvoice(BaseModel):
 
 class UpdatePaymentLabels(BaseModel):
     labels: list[str] = []
+
+
+def _validate_external_id(external_id: str | None) -> str | None:
+    if external_id and not is_valid_external_id(external_id):
+        raise ValueError(
+            "Invalid external id. Max length is 256 characters. "
+            "Space and newlines are not allowed."
+        )
+    return external_id

lnbits/core/services/fiat_providers.py

@@ -2,6 +2,7 @@ import hashlib
 import hmac
 import json
 import time
+from base64 import b64encode
 
 import httpx
 from loguru import logger
@@ -169,6 +170,82 @@ async def verify_paypal_webhook(headers, payload: bytes):
         raise ValueError("PayPal webhook cannot be verified.") from exc
 
 
+def check_square_signature(
+    payload: bytes,
+    sig_header: str | None,
+    secret: str | None,
+    notification_url: str | None,
+):
+    if not sig_header:
+        logger.warning("Square signature header is missing.")
+        raise ValueError("Square signature header is missing.")
+
+    if not secret:
+        logger.warning("Square webhook signature key is not set.")
+        raise ValueError("Square webhook cannot be verified.")
+
+    if not notification_url:
+        logger.warning("Square webhook notification URL is not set.")
+        raise ValueError("Square webhook cannot be verified.")
+
+    signed_payload = notification_url.encode() + payload
+    computed_signature = b64encode(
+        hmac.new(
+            key=secret.encode(), msg=signed_payload, digestmod=hashlib.sha256
+        ).digest()
+    ).decode()
+
+    if hmac.compare_digest(computed_signature, sig_header) is not True:
+        logger.warning("Square signature verification failed.")
+        raise ValueError("Square signature verification failed.")
+
+
+def check_revolut_signature(
+    payload: bytes,
+    sig_header: str | None,
+    timestamp_header: str | None,
+    secret: str | None,
+    tolerance_seconds=300,
+):
+    if not sig_header:
+        logger.warning("Revolut signature header is missing.")
+        raise ValueError("Revolut signature header is missing.")
+
+    if not timestamp_header:
+        logger.warning("Revolut timestamp header is missing.")
+        raise ValueError("Revolut timestamp header is missing.")
+
+    if not secret:
+        logger.warning("Revolut webhook signing secret is not set.")
+        raise ValueError("Revolut webhook cannot be verified.")
+
+    try:
+        timestamp = int(timestamp_header)
+    except ValueError as exc:
+        logger.warning("Invalid Revolut timestamp.")
+        raise ValueError("Invalid Revolut timestamp.") from exc
+
+    timestamp_seconds = timestamp / 1000 if timestamp > 9999999999 else timestamp
+
+    if abs(time.time() - timestamp_seconds) > tolerance_seconds:
+        logger.warning("Timestamp outside tolerance.")
+        raise ValueError("Timestamp outside tolerance." f"Timestamp: {timestamp}")
+
+    signed_payload = b"v1." + timestamp_header.encode() + b"." + payload
+    digest = hmac.new(
+        key=secret.encode(), msg=signed_payload, digestmod=hashlib.sha256
+    ).hexdigest()
+    expected_signature = f"v1={digest}"
+
+    provided_signatures = [sig.strip() for sig in sig_header.split(",") if sig.strip()]
+    if not any(
+        hmac.compare_digest(expected_signature, provided)
+        for provided in provided_signatures
+    ):
+        logger.warning("Revolut signature verification failed.")
+        raise ValueError("Revolut signature verification failed.")
+
+
 async def test_connection(provider: str) -> SimpleStatus:
     """
     Test the connection to Stripe by checking if the API key is valid.

lnbits/core/services/payments.py

@@ -64,6 +64,7 @@ async def pay_invoice(
     description: str = "",
     tag: str = "",
     labels: list[str] | None = None,
+    external_id: str | None = None,
     conn: Connection | None = None,
 ) -> Payment:
     if settings.lnbits_only_allow_incoming_payments:
@@ -97,6 +98,7 @@ async def pay_invoice(
             memo=description or invoice.description or "",
             extra=extra,
             labels=labels,
+            external_id=external_id,
         )
 
     async with db.reuse_conn(conn) if conn else db.connect() as new_conn:
@@ -217,6 +219,7 @@ async def create_wallet_invoice(wallet_id: str, data: CreateInvoice) -> Payment:
             internal=data.internal,
             payment_hash=data.payment_hash,
             labels=data.labels,
+            external_id=data.external_id,
             conn=conn,
         )
 
@@ -258,6 +261,7 @@ async def create_invoice(
     internal: bool | None = False,
     payment_hash: str | None = None,
     labels: list[str] | None = None,
+    external_id: str | None = None,
     conn: Connection | None = None,
 ) -> Payment:
     if not amount > 0:
@@ -342,6 +346,7 @@ async def create_invoice(
         webhook=webhook,
         fee=invoice_response.fee_msat or 0,
         labels=labels,
+        external_id=external_id,
     )
 
     payment = await create_payment(

lnbits/core/views/callback_api.py

@@ -4,17 +4,30 @@ from fastapi import APIRouter, Request
 from loguru import logger
 
 from lnbits.core.crud.payments import (
+    get_payments,
     get_standalone_payment,
+    update_payment,
 )
+from lnbits.core.models import Payment, PaymentFilters
 from lnbits.core.models.misc import SimpleStatus
 from lnbits.core.models.payments import CreateInvoice
 from lnbits.core.services.fiat_providers import (
     check_fiat_status,
+    check_revolut_signature,
+    check_square_signature,
     check_stripe_signature,
     verify_paypal_webhook,
 )
-from lnbits.core.services.payments import create_fiat_invoice
+from lnbits.core.services.payments import (
+    create_fiat_invoice,
+    create_wallet_invoice,
+    service_fee_fiat,
+)
+from lnbits.db import Filter, Filters
+from lnbits.fiat import get_fiat_provider
 from lnbits.fiat.base import FiatSubscriptionPaymentOptions
+from lnbits.fiat.revolut import RevolutWallet
+from lnbits.fiat.square import SquareWallet
 from lnbits.settings import settings
 
 callback_router = APIRouter(prefix="/api/v1/callback", tags=["callback"])
@@ -50,6 +63,41 @@ async def api_generic_webhook_handler(
             message=f"Callback received successfully from '{provider_name}'.",
         )
 
+    if provider_name.lower() == "square":
+        payload = await request.body()
+        sig_header = request.headers.get("x-square-hmacsha256-signature")
+        check_square_signature(
+            payload,
+            sig_header,
+            settings.square_webhook_signature_key,
+            settings.square_payment_webhook_url,
+        )
+        event = await request.json()
+        await handle_square_event(event)
+
+        return SimpleStatus(
+            success=True,
+            message=f"Callback received successfully from '{provider_name}'.",
+        )
+
+    if provider_name.lower() == "revolut":
+        payload = await request.body()
+        sig_header = request.headers.get("Revolut-Signature")
+        timestamp_header = request.headers.get("Revolut-Request-Timestamp")
+        check_revolut_signature(
+            payload,
+            sig_header,
+            timestamp_header,
+            settings.revolut_webhook_signing_secret,
+        )
+        event = await request.json()
+        await handle_revolut_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}'.",
@@ -280,3 +328,386 @@ def _deserialize_paypal_metadata(custom_id: str) -> FiatSubscriptionPaymentOptio
     except (json.JSONDecodeError, IndexError) as e:
         logger.warning(f"Failed to deserialize PayPal metadata: {e}")
         return FiatSubscriptionPaymentOptions()
+
+
+async def handle_square_event(event: dict):
+    event_id = event.get("event_id") or event.get("id", "")
+    event_type = event.get("type", "")
+    logger.info(f"Handling Square event: '{event_id}'. Type: '{event_type}'.")
+
+    if event_type == "payment.updated":
+        await _handle_square_payment_event(event)
+        return
+
+    if event_type == "invoice.payment_made":
+        await _handle_square_invoice_payment_made(event)
+        return
+
+    logger.warning(f"Unhandled Square event type: '{event_type}'.")
+
+
+async def handle_revolut_event(event: dict):
+    event_type = event.get("event", "")
+    order_id = event.get("order_id")
+    logger.info(f"Handling Revolut event: '{event_type}'. Order ID: '{order_id}'.")
+
+    if event_type in ["ORDER_AUTHORISED", "ORDER_COMPLETED"]:
+        if not order_id:
+            logger.warning("Revolut event missing order_id.")
+            return
+
+        payment = await get_standalone_payment(f"fiat_revolut_order_{order_id}")
+        if not payment:
+            logger.warning(f"No payment found for Revolut order: '{order_id}'.")
+            await _handle_revolut_subscription_order_paid(order_id)
+            return
+
+        await check_fiat_status(payment)
+        return
+
+    if event_type == "SUBSCRIPTION_INITIATED":
+        await _handle_revolut_subscription_initiated(event)
+        return
+
+    if event_type in [
+        "SUBSCRIPTION_CANCELLED",
+        "SUBSCRIPTION_FINISHED",
+        "SUBSCRIPTION_OVERDUE",
+    ]:
+        logger.info(f"Revolut subscription lifecycle event received: '{event_type}'.")
+        return
+
+    logger.warning(f"Unhandled Revolut event type: '{event_type}'.")
+
+
+async def _handle_revolut_subscription_initiated(event: dict):
+    subscription_id = event.get("subscription_id")
+    if not subscription_id:
+        subscription_id = event.get("id")
+
+    if not subscription_id:
+        logger.warning("Revolut subscription event missing subscription_id.")
+        return
+
+    fiat_provider = await _get_revolut_provider()
+    if not fiat_provider:
+        return
+
+    subscription = await fiat_provider.get_subscription(subscription_id)
+    await _handle_revolut_subscription(subscription, fiat_provider)
+
+
+async def _get_revolut_provider() -> RevolutWallet | None:
+    fiat_provider = await get_fiat_provider("revolut")
+    if not isinstance(fiat_provider, RevolutWallet):
+        logger.warning("Revolut fiat provider is not configured.")
+        return None
+    return fiat_provider
+
+
+async def _handle_revolut_subscription(
+    subscription: dict, fiat_provider: RevolutWallet
+):
+    subscription_id = subscription.get("id")
+    if not subscription_id:
+        logger.warning("Revolut subscription missing id.")
+        return
+
+    reference = fiat_provider.deserialize_subscription_reference(
+        subscription.get("external_reference")
+    )
+    if not reference:
+        logger.warning("Revolut subscription event missing LNbits metadata.")
+        return
+
+    cycle_id = subscription.get("current_cycle_id")
+    if not cycle_id:
+        logger.warning("Revolut subscription missing current_cycle_id.")
+        return
+
+    cycle = await fiat_provider.get_subscription_cycle(subscription_id, cycle_id)
+    order_id = cycle.get("order_id")
+    if not order_id:
+        logger.warning("Revolut subscription cycle missing order_id.")
+        return
+
+    existing_payment = await get_standalone_payment(f"fiat_revolut_order_{order_id}")
+    if existing_payment:
+        if existing_payment.external_id != subscription_id:
+            existing_payment.external_id = subscription_id
+            await update_payment(existing_payment)
+        await check_fiat_status(existing_payment)
+        return
+
+    order = await fiat_provider.get_order(order_id)
+    amount_minor = order.get("amount")
+    currency = (order.get("currency") or "").upper()
+    if amount_minor is None or not currency:
+        raise ValueError("Revolut subscription order missing amount or currency.")
+
+    extra = {
+        **(reference.extra or {}),
+        "subscription_request_id": reference.subscription_request_id,
+        "fiat_method": "subscription",
+        "tag": reference.tag,
+        "subscription": {
+            "checking_id": f"order_{order_id}",
+            "payment_request": order.get("checkout_url") or "",
+        },
+    }
+    lnbits_payment = await _create_revolut_subscription_payment(
+        wallet_id=reference.wallet_id,
+        amount_minor=amount_minor,
+        currency=currency,
+        memo=reference.memo or "",
+        extra=extra,
+        order_id=order_id,
+        payment_request=order.get("checkout_url") or "",
+        subscription_id=subscription_id,
+    )
+
+    await check_fiat_status(lnbits_payment)
+
+
+async def _handle_revolut_subscription_order_paid(order_id: str):
+    fiat_provider = await _get_revolut_provider()
+    if not fiat_provider:
+        return
+
+    order = await fiat_provider.get_order(order_id)
+    if order.get("type") != "payment" or order.get("state") != "completed":
+        logger.warning(f"Revolut order is not a completed payment: '{order_id}'.")
+        return
+
+    channel_data = order.get("channel_data") or {}
+    subscription_id = channel_data.get("subscription_id")
+    if not subscription_id:
+        logger.warning(f"Revolut order missing subscription_id: '{order_id}'.")
+        return
+
+    subscription = await fiat_provider.get_subscription(subscription_id)
+    if subscription.get("state") != "active":
+        logger.warning(f"Revolut subscription is not active: '{subscription_id}'.")
+        return
+
+    await _handle_revolut_subscription_initiated(subscription)
+
+
+async def _create_revolut_subscription_payment(
+    wallet_id: str,
+    amount_minor: int,
+    currency: str,
+    memo: str,
+    extra: dict,
+    order_id: str,
+    payment_request: str,
+    subscription_id: str,
+) -> Payment:
+    amount = RevolutWallet.minor_units_to_amount(amount_minor, currency)
+    payment = await create_wallet_invoice(
+        wallet_id,
+        CreateInvoice(
+            unit=currency,
+            amount=amount,
+            memo=memo,
+            extra=extra,
+            internal=True,
+            external_id=subscription_id,
+        ),
+    )
+    payment.fee = -abs(service_fee_fiat(payment.msat, "revolut"))
+    payment.fiat_provider = "revolut"
+    payment.extra["fiat_checking_id"] = f"order_{order_id}"
+    payment.extra["fiat_payment_request"] = payment_request
+    checking_id = f"fiat_revolut_order_{order_id}"
+    await update_payment(payment, checking_id)
+    payment.checking_id = checking_id
+    return payment
+
+
+async def _handle_square_payment_event(event: dict):
+    payment = _square_extract_payment(event)
+    payment_options = _deserialize_square_metadata(_square_payment_note(payment))
+    if payment_options.wallet_id:
+        if not _square_payment_is_completed(payment):
+            logger.debug("Square subscription payment is not completed yet.")
+            return
+        await _handle_square_subscription_payment(payment, payment_options)
+        return
+
+    order_id = payment.get("order_id")
+    if not order_id:
+        logger.warning("Square payment event missing order_id.")
+        return
+
+    lnbits_payment = await get_standalone_payment(f"fiat_square_order_{order_id}")
+    if not lnbits_payment:
+        logger.warning(f"No payment found for Square order: '{order_id}'.")
+        return
+
+    await check_fiat_status(lnbits_payment)
+
+
+async def _handle_square_invoice_payment_made(event: dict):
+    invoice = event.get("data", {}).get("object", {}).get("invoice") or {}
+    order_id = invoice.get("order_id")
+    if not order_id:
+        logger.warning("Square invoice.payment_made event missing order_id.")
+        return
+    subscription_id = invoice.get("subscription_id")
+
+    fiat_provider = await get_fiat_provider("square")
+    if not isinstance(fiat_provider, SquareWallet):
+        logger.warning("Square fiat provider is not configured.")
+        return
+
+    payment = await fiat_provider.get_payment_for_order(order_id)
+    if not payment:
+        logger.warning(f"No Square payment found for invoice order: '{order_id}'.")
+        return
+
+    payment_options = _deserialize_square_metadata(_square_payment_note(payment))
+    if not payment_options.wallet_id:
+        payment_id = payment.get("id")
+        stored_payment = (
+            await get_standalone_payment(f"fiat_square_payment_{payment_id}")
+            if payment_id
+            else None
+        )
+        if not stored_payment and subscription_id:
+            stored_payments = await get_payments(
+                filters=Filters(
+                    filters=[
+                        Filter.parse_query(
+                            "external_id", [subscription_id], PaymentFilters
+                        )
+                    ],
+                    model=PaymentFilters,
+                    sortby="created_at",
+                    direction="desc",
+                    limit=1,
+                )
+            )
+            stored_payment = stored_payments[0] if stored_payments else None
+        if stored_payment:
+            payment_options = _square_payment_options_from_payment(stored_payment)
+        else:
+            logger.warning("Square subscription payment missing LNbits metadata.")
+            return
+
+    await _handle_square_subscription_payment(
+        payment,
+        payment_options,
+        invoice.get("public_url") or "",
+        square_subscription_id=subscription_id,
+    )
+
+
+async def _handle_square_subscription_payment(
+    payment: dict,
+    payment_options: FiatSubscriptionPaymentOptions,
+    payment_request: str = "",
+    square_subscription_id: str | None = None,
+):
+    amount_money = payment.get("amount_money") or {}
+    amount = amount_money.get("amount")
+    currency = (amount_money.get("currency") or "").upper()
+    payment_id = payment.get("id")
+    if amount is None or not currency or not payment_id:
+        raise ValueError("Square subscription payment event missing payment amount.")
+    wallet_id = payment_options.wallet_id
+    if not wallet_id:
+        raise ValueError("Square subscription payment event missing wallet_id.")
+
+    checking_id = f"payment_{payment_id}"
+    existing_payment = await get_standalone_payment(f"fiat_square_{checking_id}")
+    if existing_payment:
+        if (
+            square_subscription_id
+            and existing_payment.external_id != square_subscription_id
+        ):
+            existing_payment.external_id = square_subscription_id
+            await update_payment(existing_payment)
+        await check_fiat_status(existing_payment)
+        return
+
+    square_subscription_id = square_subscription_id or (
+        payment_options.extra or {}
+    ).get("square_subscription_id")
+    extra = {
+        **(payment_options.extra or {}),
+        "subscription_request_id": payment_options.subscription_request_id,
+        "fiat_method": "subscription",
+        "tag": payment_options.tag,
+        "subscription": {
+            "checking_id": checking_id,
+            "payment_request": payment_request,
+        },
+    }
+
+    lnbits_payment = await create_fiat_invoice(
+        wallet_id=wallet_id,
+        invoice_data=CreateInvoice(
+            unit=currency,
+            amount=amount / 100,
+            memo=payment_options.memo or "",
+            extra=extra,
+            fiat_provider="square",
+            external_id=square_subscription_id,
+        ),
+    )
+
+    await check_fiat_status(lnbits_payment)
+
+
+def _square_payment_options_from_payment(
+    payment: Payment,
+) -> FiatSubscriptionPaymentOptions:
+    extra = payment.extra or {}
+    return FiatSubscriptionPaymentOptions(
+        wallet_id=payment.wallet_id,
+        tag=extra.get("tag") or payment.tag,
+        subscription_request_id=extra.get("subscription_request_id"),
+        extra=extra,
+        memo=payment.memo,
+    )
+
+
+def _square_extract_payment(event: dict) -> dict:
+    event_object = event.get("data", {}).get("object", {})
+    return event_object.get("payment") or event_object
+
+
+def _square_payment_is_completed(payment: dict) -> bool:
+    return (payment.get("status") or "").upper() == "COMPLETED"
+
+
+def _square_payment_note(payment: dict) -> str:
+    return payment.get("note") or payment.get("payment_note") or ""
+
+
+def _deserialize_square_metadata(custom_id: str) -> FiatSubscriptionPaymentOptions:
+    try:
+        meta = json.loads(custom_id)
+        if not isinstance(meta, list):
+            return FiatSubscriptionPaymentOptions()
+        wallet_id = meta[0] if len(meta) > 0 else None
+        tag = meta[1] if len(meta) > 1 else None
+        subscription_request_id = meta[2] if len(meta) > 2 else None
+        extra_link = meta[3] if len(meta) > 3 else None
+        memo = meta[4] if len(meta) > 4 else None
+
+        extra = {
+            "link": extra_link,
+            "subscription_request_id": subscription_request_id,
+        }
+
+        return FiatSubscriptionPaymentOptions(
+            wallet_id=wallet_id,
+            tag=tag,
+            subscription_request_id=subscription_request_id,
+            extra=extra,
+            memo=memo,
+        )
+    except (json.JSONDecodeError, IndexError, TypeError):
+        return FiatSubscriptionPaymentOptions()

lnbits/core/views/fiat_api.py

@@ -2,17 +2,35 @@ from http import HTTPStatus
 
 from fastapi import APIRouter, Depends, HTTPException
 from loguru import logger
+from pydantic import BaseModel
 
+from lnbits.core.crud.settings import set_settings_field
 from lnbits.core.models.misc import SimpleStatus
 from lnbits.core.models.wallets import WalletTypeInfo
+from lnbits.core.services import update_cached_settings
 from lnbits.core.services.fiat_providers import test_connection
 from lnbits.decorators import check_admin, require_admin_key
-from lnbits.fiat import StripeWallet, get_fiat_provider
+from lnbits.fiat import RevolutWallet, StripeWallet, get_fiat_provider
 from lnbits.fiat.base import CreateFiatSubscription, FiatSubscriptionResponse
 
 fiat_router = APIRouter(tags=["Fiat API"], prefix="/api/v1/fiat")
 
 
+class RevolutCreateWebhook(BaseModel):
+    url: str
+    endpoint: str | None = None
+    api_secret_key: str | None = None
+    api_version: str | None = None
+
+
+class RevolutCreateWebhookResponse(BaseModel):
+    id: str | None = None
+    url: str
+    events: list[str] = []
+    signing_secret: str
+    already_exists: bool = False
+
+
 @fiat_router.put(
     "/check/{provider}",
     status_code=HTTPStatus.OK,
@@ -22,6 +40,54 @@ async def api_test_fiat_provider(provider: str) -> SimpleStatus:
     return await test_connection(provider)
 
 
+@fiat_router.post(
+    "/revolut/webhook",
+    status_code=HTTPStatus.OK,
+    dependencies=[Depends(check_admin)],
+)
+async def api_create_revolut_webhook(
+    data: RevolutCreateWebhook,
+) -> RevolutCreateWebhookResponse:
+    try:
+        webhook = await RevolutWallet.create_webhook(
+            url=data.url,
+            endpoint=data.endpoint,
+            api_secret_key=data.api_secret_key,
+            api_version=data.api_version,
+        )
+    except ValueError as exc:
+        logger.warning(exc)
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+    except Exception as exc:
+        logger.warning(exc)
+        raise HTTPException(
+            status_code=500, detail="Failed to create Revolut webhook."
+        ) from exc
+
+    signing_secret = webhook.get("signing_secret")
+    webhook_url = webhook.get("url") or data.url
+    if not signing_secret:
+        raise HTTPException(
+            status_code=502, detail="Revolut returned no webhook signing secret."
+        )
+
+    updated_settings = {
+        "revolut_payment_webhook_url": webhook_url,
+        "revolut_webhook_signing_secret": signing_secret,
+    }
+    for key, value in updated_settings.items():
+        await set_settings_field(key, value)
+    update_cached_settings(updated_settings)
+
+    return RevolutCreateWebhookResponse(
+        id=webhook.get("id"),
+        url=webhook_url,
+        events=webhook.get("events") or [],
+        signing_secret=signing_secret,
+        already_exists=webhook.get("already_exists", False),
+    )
+
+
 @fiat_router.post(
     "/{provider}/subscription",
     status_code=HTTPStatus.OK,

lnbits/core/views/payment_api.py

@@ -263,6 +263,7 @@ async def api_payments_create(
             payment_request=invoice_data.bolt11,
             extra=invoice_data.extra,
             labels=invoice_data.labels,
+            external_id=invoice_data.external_id,
         )
         return payment
 

lnbits/fiat/__init__.py

@@ -9,6 +9,8 @@ from lnbits.fiat.base import FiatProvider
 from lnbits.settings import settings
 
 from .paypal import PayPalWallet
+from .revolut import RevolutWallet
+from .square import SquareWallet
 from .stripe import StripeWallet
 
 fiat_module = importlib.import_module("lnbits.fiat")
@@ -17,6 +19,8 @@ fiat_module = importlib.import_module("lnbits.fiat")
 class FiatProviderType(Enum):
     stripe = "StripeWallet"
     paypal = "PayPalWallet"
+    square = "SquareWallet"
+    revolut = "RevolutWallet"
 
 
 async def get_fiat_provider(name: str) -> FiatProvider | None:
@@ -52,5 +56,7 @@ fiat_providers: dict[str, FiatProvider] = {}
 
 __all__ = [
     "PayPalWallet",
+    "RevolutWallet",
+    "SquareWallet",
     "StripeWallet",
 ]

lnbits/fiat/base.py

@@ -95,6 +95,10 @@ class FiatSubscriptionPaymentOptions(BaseModel):
         description="Unique ID that can be used to identify the subscription request."
         "If not provided, one will be generated.",
     )
+    customer_email: str | None = Field(
+        default=None,
+        description="The customer email to use for the subscription.",
+    )
     tag: str | None = Field(
         default=None,
         description="Payments created by the recurring subscription"

lnbits/fiat/revolut.py

@@ -0,0 +1,637 @@
+import asyncio
+import ipaddress
+import json
+from collections.abc import AsyncGenerator
+from decimal import ROUND_HALF_UP, Decimal
+from typing import Any
+from urllib.parse import urlparse
+
+import httpx
+from loguru import logger
+from pydantic import BaseModel, Field, ValidationError
+
+from lnbits.helpers import normalize_endpoint, urlsafe_short_hash
+from lnbits.settings import settings
+
+from .base import (
+    FiatInvoiceResponse,
+    FiatPaymentFailedStatus,
+    FiatPaymentPendingStatus,
+    FiatPaymentResponse,
+    FiatPaymentStatus,
+    FiatPaymentSuccessStatus,
+    FiatProvider,
+    FiatStatusResponse,
+    FiatSubscriptionPaymentOptions,
+    FiatSubscriptionResponse,
+)
+
+
+class RevolutCheckoutOptions(BaseModel):
+    class Config:
+        extra = "ignore"
+
+    success_url: str | None = None
+    metadata: dict[str, Any] = Field(default_factory=dict)
+    description: str | None = None
+
+
+class RevolutCreateInvoiceOptions(BaseModel):
+    class Config:
+        extra = "ignore"
+
+    checkout: RevolutCheckoutOptions | None = None
+
+
+class RevolutSubscriptionReference(BaseModel):
+    wallet_id: str
+    tag: str | None = None
+    subscription_request_id: str | None = None
+    extra: dict[str, Any] | None = None
+    memo: str | None = None
+
+
+REVOLUT_WEBHOOK_EVENTS = [
+    "ORDER_AUTHORISED",
+    "ORDER_COMPLETED",
+    "SUBSCRIPTION_INITIATED",
+]
+
+ZERO_DECIMAL_CURRENCIES = {
+    "BIF",
+    "CLP",
+    "DJF",
+    "GNF",
+    "ISK",
+    "JPY",
+    "KMF",
+    "KRW",
+    "PYG",
+    "RWF",
+    "UGX",
+    "VND",
+    "VUV",
+    "XAF",
+    "XOF",
+    "XPF",
+}
+THREE_DECIMAL_CURRENCIES = {
+    "BHD",
+    "IQD",
+    "JOD",
+    "KWD",
+    "LYD",
+    "OMR",
+    "TND",
+}
+REVOLUT_CUSTOMER_LIST_LIMIT = 500
+REVOLUT_CUSTOMER_LIST_MAX_PAGES = 20
+REVOLUT_REQUEST_TIMEOUT = 30
+
+
+class RevolutWallet(FiatProvider):
+    """https://developer.revolut.com/docs/merchant"""
+
+    def __init__(self):
+        logger.debug("Initializing RevolutWallet")
+        self._settings_fields = self._settings_connection_fields()
+        if not settings.revolut_api_endpoint:
+            raise ValueError("Cannot initialize RevolutWallet: missing endpoint.")
+        if not settings.revolut_api_secret_key:
+            raise ValueError("Cannot initialize RevolutWallet: missing API secret key.")
+
+        self.endpoint = normalize_endpoint(settings.revolut_api_endpoint)
+        self.headers = {
+            "Authorization": f"Bearer {settings.revolut_api_secret_key}",
+            "Revolut-Api-Version": settings.revolut_api_version,
+            "Content-Type": "application/json",
+            "User-Agent": settings.user_agent,
+        }
+        self.client = httpx.AsyncClient(base_url=self.endpoint, headers=self.headers)
+        logger.info("RevolutWallet initialized.")
+
+    async def cleanup(self):
+        try:
+            await self.client.aclose()
+        except RuntimeError as e:
+            logger.warning(f"Error closing Revolut wallet connection: {e}")
+
+    async def status(
+        self, only_check_settings: bool | None = 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(
+                "/api/orders",
+                params={"limit": 1},
+                timeout=REVOLUT_REQUEST_TIMEOUT,
+            )
+            r.raise_for_status()
+            _ = r.json()
+            return FiatStatusResponse(balance=0)
+        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: str | None = None,
+        extra: dict[str, Any] | None = None,
+        **kwargs,
+    ) -> FiatInvoiceResponse:
+        opts = self._parse_create_opts(extra or {})
+        if opts is None:
+            return FiatInvoiceResponse(
+                ok=False, error_message="Invalid Revolut options"
+            )
+
+        amount_minor = self.amount_to_minor_units(amount, currency)
+        checkout = opts.checkout or RevolutCheckoutOptions()
+        success_url = (
+            checkout.success_url
+            or settings.revolut_payment_success_url
+            or "https://lnbits.com"
+        )
+
+        payload = {
+            "amount": amount_minor,
+            "currency": currency.upper(),
+            "description": checkout.description or memo or "LNbits Invoice",
+            "redirect_url": success_url,
+            "metadata": {
+                **checkout.metadata,
+                "payment_hash": payment_hash,
+                "alan_action": "invoice",
+            },
+        }
+
+        try:
+            r = await self.client.post(
+                "/api/orders", json=payload, timeout=REVOLUT_REQUEST_TIMEOUT
+            )
+            r.raise_for_status()
+            data = r.json()
+            order_id = data.get("id")
+            checkout_url = data.get("checkout_url")
+            if not order_id or not checkout_url:
+                return FiatInvoiceResponse(
+                    ok=False, error_message="Server error: missing order id or url"
+                )
+            return FiatInvoiceResponse(
+                ok=True,
+                checking_id=f"order_{order_id}",
+                payment_request=checkout_url,
+            )
+        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 create_subscription(
+        self,
+        subscription_id: str,
+        quantity: int,
+        payment_options: FiatSubscriptionPaymentOptions,
+        **kwargs,
+    ) -> FiatSubscriptionResponse:
+        if quantity != 1:
+            return FiatSubscriptionResponse(
+                ok=False,
+                error_message="Revolut subscriptions do not support quantity.",
+            )
+
+        wallet_id = payment_options.wallet_id
+        if not wallet_id:
+            return FiatSubscriptionResponse(
+                ok=False, error_message="Wallet ID is required."
+            )
+
+        extra = payment_options.extra or {}
+        if not payment_options.subscription_request_id:
+            payment_options.subscription_request_id = urlsafe_short_hash()
+
+        reference = RevolutSubscriptionReference(
+            wallet_id=wallet_id,
+            tag=payment_options.tag,
+            subscription_request_id=payment_options.subscription_request_id,
+            extra=extra,
+            memo=payment_options.memo,
+        )
+        payload: dict[str, Any] = {
+            "plan_variation_id": subscription_id,
+            "external_reference": self._serialize_subscription_reference(reference),
+            "setup_order_redirect_url": (
+                payment_options.success_url
+                or settings.revolut_payment_success_url
+                or "https://lnbits.com"
+            ),
+        }
+        if extra.get("trial_duration"):
+            payload["trial_duration"] = extra["trial_duration"]
+
+        headers = {
+            **self.headers,
+            "Idempotency-Key": payment_options.subscription_request_id,
+        }
+
+        try:
+            customer_id, customer_error = await self._get_subscription_customer_id(
+                payment_options
+            )
+            if not customer_id:
+                return FiatSubscriptionResponse(ok=False, error_message=customer_error)
+            payload["customer_id"] = customer_id
+            r = await self.client.post(
+                "/api/subscriptions",
+                json=payload,
+                headers=headers,
+                timeout=REVOLUT_REQUEST_TIMEOUT,
+            )
+            r.raise_for_status()
+            data = r.json()
+            revolut_subscription_id = data.get("id")
+            setup_order_id = data.get("setup_order_id")
+            if not revolut_subscription_id or not setup_order_id:
+                return FiatSubscriptionResponse(
+                    ok=False,
+                    error_message=(
+                        "Server error: missing subscription id or setup order id"
+                    ),
+                )
+
+            setup_order = await self.get_order(setup_order_id)
+            checkout_url = setup_order.get("checkout_url")
+            if not checkout_url:
+                return FiatSubscriptionResponse(
+                    ok=False, error_message="Server error: missing setup checkout url"
+                )
+
+            return FiatSubscriptionResponse(
+                ok=True,
+                checkout_session_url=checkout_url,
+                subscription_request_id=payment_options.subscription_request_id,
+            )
+        except json.JSONDecodeError:
+            return FiatSubscriptionResponse(
+                ok=False, error_message="Server error: invalid json response"
+            )
+        except Exception as exc:
+            logger.warning(exc)
+            return FiatSubscriptionResponse(
+                ok=False, error_message=f"Unable to connect to {self.endpoint}."
+            )
+
+    async def cancel_subscription(
+        self,
+        subscription_id: str,
+        correlation_id: str,
+        **kwargs,
+    ) -> FiatSubscriptionResponse:
+        try:
+            r = await self.client.post(
+                f"/api/subscriptions/{subscription_id}/cancel",
+                timeout=REVOLUT_REQUEST_TIMEOUT,
+            )
+            r.raise_for_status()
+            return FiatSubscriptionResponse(ok=True)
+        except Exception as exc:
+            logger.warning(exc)
+            return FiatSubscriptionResponse(
+                ok=False, error_message="Unable to cancel subscription."
+            )
+
+    async def pay_invoice(self, payment_request: str) -> FiatPaymentResponse:
+        raise NotImplementedError("Revolut does not support paying invoices directly.")
+
+    async def get_invoice_status(self, checking_id: str) -> FiatPaymentStatus:
+        try:
+            order_id = self._normalize_revolut_id(checking_id)
+            return self._status_from_order(await self.get_order(order_id))
+        except Exception as exc:
+            logger.debug(f"Error getting Revolut invoice status: {exc}")
+            return FiatPaymentPendingStatus()
+
+    async def get_payment_status(self, checking_id: str) -> FiatPaymentStatus:
+        raise NotImplementedError("Revolut does not support outgoing payments.")
+
+    async def paid_invoices_stream(self) -> AsyncGenerator[str, None]:
+        logger.warning(
+            "Revolut 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 _normalize_revolut_id(self, checking_id: str) -> str:
+        value = (
+            checking_id.replace("fiat_revolut_", "", 1)
+            if checking_id.startswith("fiat_revolut_")
+            else checking_id
+        )
+        return value.replace("order_", "", 1) if value.startswith("order_") else value
+
+    async def get_order(self, order_id: str) -> dict[str, Any]:
+        r = await self.client.get(
+            f"/api/orders/{order_id}", timeout=REVOLUT_REQUEST_TIMEOUT
+        )
+        r.raise_for_status()
+        return r.json()
+
+    async def get_subscription(self, subscription_id: str) -> dict[str, Any]:
+        r = await self.client.get(
+            f"/api/subscriptions/{subscription_id}", timeout=REVOLUT_REQUEST_TIMEOUT
+        )
+        r.raise_for_status()
+        return r.json()
+
+    async def get_subscription_cycle(
+        self, subscription_id: str, cycle_id: str
+    ) -> dict[str, Any]:
+        r = await self.client.get(
+            f"/api/subscriptions/{subscription_id}/cycles/{cycle_id}",
+            timeout=REVOLUT_REQUEST_TIMEOUT,
+        )
+        r.raise_for_status()
+        return r.json()
+
+    async def _get_subscription_customer_id(
+        self, payment_options: FiatSubscriptionPaymentOptions
+    ) -> tuple[str | None, str | None]:
+        if not payment_options.customer_email:
+            return (
+                None,
+                "Revolut subscriptions require customer_email.",
+            )
+
+        customer = await self._get_customer_by_email(payment_options.customer_email)
+        customer_id = customer.get("id") if customer else None
+        if customer_id:
+            return customer_id, None
+
+        customer = await self._create_customer(payment_options.customer_email)
+        customer_id = customer.get("id")
+        if not customer_id:
+            return None, "Server error: missing customer id"
+        return customer_id, None
+
+    async def _get_customer_by_email(self, email: str) -> dict[str, Any] | None:
+        page_token = None
+        for _ in range(REVOLUT_CUSTOMER_LIST_MAX_PAGES):
+            customer_page = await self._list_customers(page_token=page_token)
+            customer = _find_customer_by_email(customer_page["customers"], email)
+            if customer:
+                return customer
+
+            page_token = customer_page.get("next_page_token")
+            if not page_token:
+                return None
+        return None
+
+    async def _list_customers(self, page_token: str | None = None) -> dict[str, Any]:
+        params: dict[str, Any] = {"limit": REVOLUT_CUSTOMER_LIST_LIMIT}
+        if page_token:
+            params["page_token"] = page_token
+        r = await self.client.get(
+            "/api/customers", params=params, timeout=REVOLUT_REQUEST_TIMEOUT
+        )
+        r.raise_for_status()
+        return _extract_customer_page(r.json())
+
+    async def _create_customer(self, email: str) -> dict[str, Any]:
+        r = await self.client.post(
+            "/api/customers",
+            json={"email": email},
+            timeout=REVOLUT_REQUEST_TIMEOUT,
+        )
+        r.raise_for_status()
+        return r.json()
+
+    @classmethod
+    async def create_webhook(
+        cls,
+        url: str,
+        endpoint: str | None = None,
+        api_secret_key: str | None = None,
+        api_version: str | None = None,
+    ) -> dict[str, Any]:
+        if not url:
+            raise ValueError("Missing Revolut webhook URL.")
+        cls._validate_webhook_url(url)
+        if not endpoint and not settings.revolut_api_endpoint:
+            raise ValueError("Missing Revolut API endpoint.")
+        if not api_secret_key and not settings.revolut_api_secret_key:
+            raise ValueError("Missing Revolut API secret key.")
+
+        base_url = normalize_endpoint(endpoint or settings.revolut_api_endpoint)
+        secret_key = api_secret_key or settings.revolut_api_secret_key
+        headers = {
+            "Authorization": f"Bearer {secret_key}",
+            "Revolut-Api-Version": api_version or settings.revolut_api_version,
+            "Content-Type": "application/json",
+            "User-Agent": settings.user_agent,
+        }
+        payload = {"url": url, "events": REVOLUT_WEBHOOK_EVENTS}
+        async with httpx.AsyncClient(base_url=base_url, headers=headers) as client:
+            webhooks = await cls._list_webhooks(client)
+            existing = await cls._get_existing_webhook(client, webhooks, url)
+            if existing:
+                existing["already_exists"] = True
+                return existing
+
+            response = await client.post(
+                "/api/webhooks", json=payload, timeout=REVOLUT_REQUEST_TIMEOUT
+            )
+            response.raise_for_status()
+            return response.json()
+
+    @classmethod
+    async def _list_webhooks(cls, client: httpx.AsyncClient) -> list[dict[str, Any]]:
+        response = await client.get("/api/webhooks", timeout=REVOLUT_REQUEST_TIMEOUT)
+        response.raise_for_status()
+        data = response.json()
+        if isinstance(data, list):
+            return data
+        if isinstance(data, dict):
+            for field in ["webhooks", "data", "items"]:
+                if isinstance(data.get(field), list):
+                    return data[field]
+        return []
+
+    @classmethod
+    async def _get_existing_webhook(
+        cls, client: httpx.AsyncClient, webhooks: list[dict[str, Any]], url: str
+    ) -> dict[str, Any] | None:
+        for webhook in webhooks:
+            if cls._normalize_webhook_url(webhook.get("url")) != (
+                cls._normalize_webhook_url(url)
+            ):
+                continue
+
+            webhook_id = webhook.get("id")
+            if webhook_id and (
+                not webhook.get("events") or not webhook.get("signing_secret")
+            ):
+                response = await client.get(
+                    f"/api/webhooks/{webhook_id}", timeout=REVOLUT_REQUEST_TIMEOUT
+                )
+                response.raise_for_status()
+                webhook = response.json()
+
+            events = set(webhook.get("events") or [])
+            missing_events = set(REVOLUT_WEBHOOK_EVENTS) - events
+            if missing_events:
+                raise ValueError(
+                    "A Revolut webhook already exists for this URL, but it is "
+                    f"missing required events: {', '.join(sorted(missing_events))}."
+                )
+
+            if not webhook.get("signing_secret"):
+                raise ValueError(
+                    "A Revolut webhook already exists for this URL, but Revolut "
+                    "did not return a signing secret."
+                )
+
+            return webhook
+        return None
+
+    @classmethod
+    def _normalize_webhook_url(cls, url: str | None) -> str:
+        return (url or "").strip().rstrip("/")
+
+    @classmethod
+    def _validate_webhook_url(cls, url: str) -> None:
+        parsed = urlparse(url)
+        hostname = parsed.hostname
+        if parsed.scheme not in ["http", "https"] or not hostname:
+            raise ValueError("Revolut webhook URL must be a clearnet URL.")
+
+        host = hostname.lower()
+        if host == "localhost" or host.endswith(".localhost"):
+            raise ValueError("Revolut webhook URL must be a clearnet URL.")
+        if host.endswith(".local") or host.endswith(".onion"):
+            raise ValueError("Revolut webhook URL must be a clearnet URL.")
+
+        try:
+            ip = ipaddress.ip_address(host)
+        except ValueError:
+            return
+
+        if (
+            ip.is_loopback
+            or ip.is_private
+            or ip.is_link_local
+            or ip.is_reserved
+            or ip.is_unspecified
+        ):
+            raise ValueError("Revolut webhook URL must be a clearnet URL.")
+
+    def _status_from_order(self, order: dict[str, Any]) -> FiatPaymentStatus:
+        status = (order.get("state") or "").upper()
+        if status == "COMPLETED":
+            return FiatPaymentSuccessStatus()
+        if status in ["CANCELLED", "FAILED"]:
+            return FiatPaymentFailedStatus()
+        return FiatPaymentPendingStatus()
+
+    @classmethod
+    def amount_to_minor_units(cls, amount: float | Decimal, currency: str) -> int:
+        scale = Decimal(10) ** cls.currency_exponent(currency)
+        return int((Decimal(str(amount)) * scale).quantize(Decimal("1"), ROUND_HALF_UP))
+
+    @classmethod
+    def minor_units_to_amount(cls, amount: int, currency: str) -> float:
+        scale = Decimal(10) ** cls.currency_exponent(currency)
+        return float(Decimal(amount) / scale)
+
+    @classmethod
+    def currency_exponent(cls, currency: str) -> int:
+        normalized = currency.upper()
+        if normalized in ZERO_DECIMAL_CURRENCIES:
+            return 0
+        if normalized in THREE_DECIMAL_CURRENCIES:
+            return 3
+        return 2
+
+    def _parse_create_opts(
+        self, raw_opts: dict[str, Any]
+    ) -> RevolutCreateInvoiceOptions | None:
+        try:
+            return RevolutCreateInvoiceOptions.parse_obj(raw_opts)
+        except ValidationError as e:
+            logger.warning(f"Invalid Revolut options: {e}")
+            return None
+
+    def _serialize_subscription_reference(
+        self, reference: RevolutSubscriptionReference
+    ) -> str:
+        payload = reference.dict(exclude_none=True)
+        serialized = json.dumps(payload, separators=(",", ":"))
+        if len(serialized) > 1024:
+            raise ValueError("Revolut subscription external_reference is too long.")
+        return serialized
+
+    def deserialize_subscription_reference(
+        self, external_reference: str | None
+    ) -> RevolutSubscriptionReference | None:
+        if not external_reference:
+            return None
+        try:
+            return RevolutSubscriptionReference.parse_obj(
+                json.loads(external_reference)
+            )
+        except (json.JSONDecodeError, ValidationError) as exc:
+            logger.warning(exc)
+            return None
+
+    def _settings_connection_fields(self) -> str:
+        return "-".join(
+            [
+                str(settings.revolut_api_endpoint),
+                str(settings.revolut_api_secret_key),
+                str(settings.revolut_api_version),
+                str(settings.revolut_webhook_signing_secret),
+            ]
+        )
+
+
+def _extract_customer_page(data: Any) -> dict[str, Any]:
+    if isinstance(data, list):
+        return {"customers": _filter_customer_list(data)}
+    if isinstance(data, dict):
+        for field in ["customers", "data", "items"]:
+            customers = data.get(field)
+            if isinstance(customers, list):
+                return {
+                    "customers": _filter_customer_list(customers),
+                    "next_page_token": data.get("next_page_token"),
+                }
+    return {"customers": []}
+
+
+def _filter_customer_list(customers: list[Any]) -> list[dict[str, Any]]:
+    return [customer for customer in customers if isinstance(customer, dict)]
+
+
+def _find_customer_by_email(
+    customers: list[dict[str, Any]], email: str
+) -> dict[str, Any] | None:
+    normalized_email = email.casefold()
+    for customer in customers:
+        if str(customer.get("email") or "").casefold() == normalized_email:
+            return customer
+    return None

lnbits/fiat/square.py

@@ -0,0 +1,620 @@
+import asyncio
+import json
+from collections.abc import AsyncGenerator
+from typing import Any, Literal
+
+import httpx
+from loguru import logger
+from pydantic import BaseModel, Field, ValidationError
+
+from lnbits.helpers import normalize_endpoint, urlsafe_short_hash
+from lnbits.settings import settings
+
+from .base import (
+    FiatInvoiceResponse,
+    FiatPaymentFailedStatus,
+    FiatPaymentPendingStatus,
+    FiatPaymentResponse,
+    FiatPaymentStatus,
+    FiatPaymentSuccessStatus,
+    FiatProvider,
+    FiatStatusResponse,
+    FiatSubscriptionPaymentOptions,
+    FiatSubscriptionResponse,
+)
+
+FiatMethod = Literal["checkout", "subscription"]
+
+
+class SquareCheckoutOptions(BaseModel):
+    class Config:
+        extra = "ignore"
+
+    success_url: str | None = None
+    metadata: dict[str, str] = Field(default_factory=dict)
+    line_item_name: str | None = None
+
+
+class SquareSubscriptionOptions(BaseModel):
+    class Config:
+        extra = "ignore"
+
+    checking_id: str | None = None
+    payment_request: str | None = None
+
+
+class SquareCreateInvoiceOptions(BaseModel):
+    class Config:
+        extra = "ignore"
+
+    fiat_method: FiatMethod = "checkout"
+    checkout: SquareCheckoutOptions | None = None
+    subscription: SquareSubscriptionOptions | None = None
+
+
+class SquareSubscriptionCheckoutInfo(BaseModel):
+    plan_variation_id: str
+    price_money: dict[str, Any]
+
+
+class SquareWallet(FiatProvider):
+    """https://developer.squareup.com/reference/square"""
+
+    def __init__(self):
+        logger.debug("Initializing SquareWallet")
+        self._settings_fields = self._settings_connection_fields()
+        if not settings.square_api_endpoint:
+            raise ValueError("Cannot initialize SquareWallet: missing endpoint.")
+        if not settings.square_access_token:
+            raise ValueError("Cannot initialize SquareWallet: missing access token.")
+        if not settings.square_location_id:
+            raise ValueError("Cannot initialize SquareWallet: missing location ID.")
+
+        self.endpoint = normalize_endpoint(settings.square_api_endpoint)
+        self.location_id = settings.square_location_id
+        self.headers = {
+            "Authorization": f"Bearer {settings.square_access_token}",
+            "Square-Version": settings.square_api_version,
+            "Content-Type": "application/json",
+            "User-Agent": settings.user_agent,
+        }
+        self.client = httpx.AsyncClient(base_url=self.endpoint, headers=self.headers)
+        logger.info("SquareWallet initialized.")
+
+    async def cleanup(self):
+        try:
+            await self.client.aclose()
+        except RuntimeError as e:
+            logger.warning(f"Error closing Square wallet connection: {e}")
+
+    async def status(
+        self, only_check_settings: bool | None = 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(f"/v2/locations/{self.location_id}", timeout=15)
+            r.raise_for_status()
+            _ = r.json()
+            return FiatStatusResponse(balance=0)
+        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: str | None = None,
+        extra: dict[str, Any] | None = None,
+        **kwargs,
+    ) -> FiatInvoiceResponse:
+        opts = self._parse_create_opts(extra or {})
+        if not opts:
+            return FiatInvoiceResponse(ok=False, error_message="Invalid Square options")
+
+        if opts.fiat_method == "subscription":
+            return self._create_subscription_invoice(opts.subscription)
+
+        return await self._create_checkout_invoice(
+            amount=amount,
+            payment_hash=payment_hash,
+            currency=currency,
+            opts=opts,
+            memo=memo,
+        )
+
+    async def create_subscription(
+        self,
+        subscription_id: str,
+        quantity: int,
+        payment_options: FiatSubscriptionPaymentOptions,
+        **kwargs,
+    ) -> FiatSubscriptionResponse:
+        if settings.lnbits_running:
+            return FiatSubscriptionResponse(
+                ok=False, error_message="Subscription not supported for Square."
+            )
+        success_url = (
+            payment_options.success_url
+            or settings.square_payment_success_url
+            or "https://lnbits.com"
+        )
+
+        if not payment_options.subscription_request_id:
+            payment_options.subscription_request_id = urlsafe_short_hash()
+        payment_options.extra = payment_options.extra or {}
+        payment_options.extra["subscription_request_id"] = (
+            payment_options.subscription_request_id
+        )
+        try:
+            checkout_info = await self._get_subscription_checkout_info(subscription_id)
+            metadata = self._serialize_metadata(payment_options)
+            payload = {
+                "idempotency_key": payment_options.subscription_request_id,
+                "description": metadata,
+                "quick_pay": {
+                    "name": (payment_options.memo or "LNbits Subscription")[:255],
+                    "price_money": checkout_info.price_money,
+                    "location_id": self.location_id,
+                },
+                "checkout_options": {
+                    "redirect_url": success_url,
+                    "subscription_plan_id": checkout_info.plan_variation_id,
+                },
+                "payment_note": metadata,
+            }
+            r = await self.client.post(
+                "/v2/online-checkout/payment-links", json=payload
+            )
+            r.raise_for_status()
+            data = r.json()
+            payment_link = data.get("payment_link") or {}
+            url = payment_link.get("url")
+            if not url:
+                return FiatSubscriptionResponse(
+                    ok=False, error_message="Server error: missing url"
+                )
+            return FiatSubscriptionResponse(
+                ok=True,
+                checkout_session_url=url,
+                subscription_request_id=payment_options.subscription_request_id,
+            )
+        except json.JSONDecodeError as exc:
+            logger.warning(exc)
+            return FiatSubscriptionResponse(
+                ok=False, error_message="Server error: invalid json response"
+            )
+        except Exception as exc:
+            logger.warning(exc)
+            return FiatSubscriptionResponse(
+                ok=False, error_message=f"Unable to connect to {self.endpoint}."
+            )
+
+    async def cancel_subscription(
+        self,
+        subscription_id: str,
+        correlation_id: str,
+        **kwargs,
+    ) -> FiatSubscriptionResponse:
+        try:
+            square_subscription_id = await self._get_square_subscription_id(
+                subscription_id, correlation_id
+            )
+            r = await self.client.post(
+                f"/v2/subscriptions/{square_subscription_id}/cancel"
+            )
+            r.raise_for_status()
+            return FiatSubscriptionResponse(ok=True)
+        except Exception as exc:
+            logger.warning(exc)
+            return FiatSubscriptionResponse(
+                ok=False, error_message="Unable to cancel subscription."
+            )
+
+    async def pay_invoice(self, payment_request: str) -> FiatPaymentResponse:
+        raise NotImplementedError("Square does not support paying invoices directly.")
+
+    async def get_invoice_status(self, checking_id: str) -> FiatPaymentStatus:
+        try:
+            square_id = self._normalize_square_id(checking_id)
+            if square_id.startswith("payment_"):
+                payment_id = square_id.replace("payment_", "", 1)
+                return await self._get_payment_status(payment_id)
+
+            order_id = (
+                square_id.replace("order_", "", 1)
+                if square_id.startswith("order_")
+                else square_id
+            )
+            return await self._get_order_status(order_id)
+        except Exception as exc:
+            logger.debug(f"Error getting Square invoice status: {exc}")
+            return FiatPaymentPendingStatus()
+
+    async def get_payment_status(self, checking_id: str) -> FiatPaymentStatus:
+        raise NotImplementedError("Square does not support outgoing payments.")
+
+    async def paid_invoices_stream(self) -> AsyncGenerator[str, None]:
+        logger.warning(
+            "Square 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
+
+    async def _get_order_status(self, order_id: str) -> FiatPaymentStatus:
+        order = await self._get_order(order_id)
+        payment_id = self._payment_id_from_order(order)
+        if payment_id:
+            return await self._get_payment_status(payment_id)
+
+        if (order.get("state") or "").upper() == "CANCELED":
+            return FiatPaymentFailedStatus()
+        return FiatPaymentPendingStatus()
+
+    async def _get_order(self, order_id: str) -> dict[str, Any]:
+        r = await self.client.get(f"/v2/orders/{order_id}")
+        r.raise_for_status()
+        return r.json().get("order") or {}
+
+    async def get_payment_for_order(self, order_id: str) -> dict[str, Any] | None:
+        order = await self._get_order(order_id)
+        payment_id = self._payment_id_from_order(order)
+        if not payment_id:
+            return None
+        return await self._get_payment(payment_id)
+
+    def _payment_id_from_order(self, order: dict[str, Any]) -> str | None:
+        tenders = order.get("tenders") or []
+        for tender in tenders:
+            payment_id = tender.get("payment_id")
+            if payment_id:
+                return payment_id
+        return None
+
+    async def _get_payment_status(self, payment_id: str) -> FiatPaymentStatus:
+        return self._status_from_payment(await self._get_payment(payment_id))
+
+    async def _get_payment(self, payment_id: str) -> dict[str, Any]:
+        r = await self.client.get(f"/v2/payments/{payment_id}")
+        r.raise_for_status()
+        return r.json().get("payment") or {}
+
+    async def _get_subscription_checkout_info(
+        self, subscription_plan_id: str
+    ) -> SquareSubscriptionCheckoutInfo:
+        catalog_object = await self._get_catalog_object(subscription_plan_id)
+        if catalog_object.get("type") == "SUBSCRIPTION_PLAN":
+            return await self._get_plan_checkout_info(catalog_object)
+
+        if catalog_object.get("type") == "SUBSCRIPTION_PLAN_VARIATION":
+            price_money = await self._get_subscription_price_money(
+                catalog_object,
+            )
+            plan_variation_id = catalog_object.get("id")
+            if not plan_variation_id:
+                raise ValueError("Square subscription plan variation is missing an ID.")
+            return SquareSubscriptionCheckoutInfo(
+                plan_variation_id=plan_variation_id,
+                price_money=price_money,
+            )
+
+        raise ValueError(
+            "Square subscription ID must be a plan ID or plan variation ID."
+        )
+
+    async def _get_plan_checkout_info(
+        self, catalog_object: dict[str, Any]
+    ) -> SquareSubscriptionCheckoutInfo:
+        plan_data = catalog_object.get("subscription_plan_data") or {}
+        plan_variations = plan_data.get("subscription_plan_variations") or []
+        eligible_item_ids = plan_data.get("eligible_item_ids") or []
+        plan_variation = next(
+            (
+                variation
+                for variation in plan_variations
+                if not variation.get("is_deleted")
+            ),
+            None,
+        )
+        if not plan_variation:
+            raise ValueError("Square subscription plan is missing a variation.")
+
+        price_money = await self._get_subscription_price_money(
+            plan_variation,
+            eligible_item_ids=eligible_item_ids,
+        )
+        plan_variation_id = plan_variation.get("id")
+        if not plan_variation_id:
+            raise ValueError("Square subscription plan variation is missing an ID.")
+
+        return SquareSubscriptionCheckoutInfo(
+            plan_variation_id=plan_variation_id,
+            price_money=price_money,
+        )
+
+    async def _get_catalog_object(self, object_id: str) -> dict[str, Any]:
+        r = await self.client.get(f"/v2/catalog/object/{object_id}")
+        r.raise_for_status()
+        return r.json().get("object") or {}
+
+    async def _get_subscription_price_money(
+        self,
+        plan_variation: dict[str, Any],
+        eligible_item_ids: list[str] | None = None,
+    ) -> dict[str, Any]:
+        variation_data = plan_variation.get("subscription_plan_variation_data") or {}
+        phases = variation_data.get("phases") or []
+        for phase in phases:
+            pricing = phase.get("pricing") or {}
+            price_money = pricing.get("price_money") or phase.get(
+                "recurring_price_money"
+            )
+            parsed_price_money = self._parse_price_money(price_money)
+            if parsed_price_money:
+                return parsed_price_money
+
+            if pricing.get("type") == "RELATIVE":
+                return await self._get_relative_subscription_price_money(
+                    eligible_item_ids or []
+                )
+
+        raise ValueError("Square subscription plan variation is missing price_money.")
+
+    async def _get_relative_subscription_price_money(
+        self, eligible_item_ids: list[str]
+    ) -> dict[str, Any]:
+        if len(eligible_item_ids) != 1:
+            raise ValueError(
+                "Square relative subscription plan must have exactly one item."
+            )
+
+        item = await self._get_catalog_object(eligible_item_ids[0])
+        item_variations: list[dict[str, Any]] = []
+        if item.get("type") == "ITEM":
+            item_variations = (item.get("item_data") or {}).get("variations") or []
+        elif item.get("type") == "ITEM_VARIATION":
+            item_variations = [item]
+
+        item_variation = next(
+            (
+                variation
+                for variation in item_variations
+                if not variation.get("is_deleted")
+            ),
+            None,
+        )
+        if not item_variation:
+            raise ValueError("Square subscription item is missing a variation.")
+
+        price_money = self._parse_price_money(
+            (item_variation.get("item_variation_data") or {}).get("price_money")
+        )
+        if price_money:
+            return price_money
+
+        raise ValueError("Square subscription item variation is missing price_money.")
+
+    def _parse_price_money(
+        self, price_money: dict[str, Any] | None
+    ) -> dict[str, Any] | None:
+        if (
+            price_money
+            and price_money.get("amount") is not None
+            and price_money.get("currency")
+        ):
+            return {
+                "amount": int(price_money["amount"]),
+                "currency": price_money["currency"].upper(),
+            }
+        return None
+
+    def _status_from_payment(self, payment: dict[str, Any]) -> FiatPaymentStatus:
+        status = (payment.get("status") or "").upper()
+        if status == "COMPLETED":
+            return FiatPaymentSuccessStatus()
+        if status in ["CANCELED", "FAILED"]:
+            return FiatPaymentFailedStatus()
+        return FiatPaymentPendingStatus()
+
+    async def _create_checkout_invoice(
+        self,
+        amount: float,
+        payment_hash: str,
+        currency: str,
+        opts: SquareCreateInvoiceOptions,
+        memo: str | None = None,
+    ) -> FiatInvoiceResponse:
+        amount_cents = int(amount * 100)
+        co = opts.checkout or SquareCheckoutOptions()
+        success_url = (
+            co.success_url
+            or settings.square_payment_success_url
+            or "https://lnbits.com"
+        )
+        line_item_name = (co.line_item_name or memo or "LNbits Invoice")[:255]
+        metadata = {
+            **co.metadata,
+            "payment_hash": payment_hash,
+            "alan_action": "invoice",
+        }
+
+        payload = {
+            "idempotency_key": payment_hash,
+            "order": {
+                "location_id": self.location_id,
+                "metadata": metadata,
+                "line_items": [
+                    {
+                        "name": line_item_name,
+                        "quantity": "1",
+                        "base_price_money": {
+                            "amount": amount_cents,
+                            "currency": currency.upper(),
+                        },
+                    }
+                ],
+            },
+            "checkout_options": {"redirect_url": success_url},
+        }
+        if memo:
+            payload["payment_note"] = memo[:500]
+
+        try:
+            r = await self.client.post(
+                "/v2/online-checkout/payment-links", json=payload
+            )
+            r.raise_for_status()
+            data = r.json()
+            payment_link = data.get("payment_link") or {}
+            order_id = payment_link.get("order_id")
+            url = payment_link.get("url")
+            if not order_id or not url:
+                return FiatInvoiceResponse(
+                    ok=False, error_message="Server error: missing order id or url"
+                )
+            return FiatInvoiceResponse(
+                ok=True,
+                checking_id=f"order_{order_id}",
+                payment_request=url,
+            )
+        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}."
+            )
+
+    def _create_subscription_invoice(
+        self, opts: SquareSubscriptionOptions | None
+    ) -> FiatInvoiceResponse:
+        term = opts or SquareSubscriptionOptions()
+        checking_id = term.checking_id or f"payment_{urlsafe_short_hash()}"
+        return FiatInvoiceResponse(
+            ok=True,
+            checking_id=checking_id,
+            payment_request=term.payment_request or "",
+        )
+
+    def _normalize_square_id(self, checking_id: str) -> str:
+        return (
+            checking_id.replace("fiat_square_", "", 1)
+            if checking_id.startswith("fiat_square_")
+            else checking_id
+        )
+
+    def _parse_create_opts(
+        self, raw_opts: dict[str, Any]
+    ) -> SquareCreateInvoiceOptions | None:
+        try:
+            return SquareCreateInvoiceOptions.parse_obj(raw_opts)
+        except ValidationError as e:
+            logger.warning(f"Invalid Square options: {e}")
+            return None
+
+    def _serialize_metadata(
+        self, payment_options: FiatSubscriptionPaymentOptions
+    ) -> str:
+        extra_link = None
+        if payment_options.extra:
+            raw_link = payment_options.extra.get("link")
+            extra_link = str(raw_link)[:200] if raw_link else None
+
+        meta = [
+            payment_options.wallet_id,
+            payment_options.tag,
+            payment_options.subscription_request_id,
+            extra_link,
+        ]
+
+        memo_limit = 493 - len(json.dumps(meta, separators=(",", ":")))
+        if memo_limit > 0 and payment_options.memo:
+            meta.append(payment_options.memo[:memo_limit])
+        else:
+            meta.append(None)
+
+        metadata = json.dumps(meta, separators=(",", ":"))
+        if len(metadata) > 500:
+            raise ValueError("Square subscription metadata is too long.")
+        return metadata
+
+    async def _get_square_subscription_id(
+        self, subscription_id: str, wallet_id: str
+    ) -> str:
+        try:
+            from lnbits.core.crud.payments import get_payments
+            from lnbits.core.models import PaymentFilters
+            from lnbits.db import Filter, Filters
+
+            payments = await get_payments(
+                wallet_id=wallet_id,
+                filters=Filters(
+                    filters=[
+                        Filter.parse_query(
+                            "external_id", [subscription_id], PaymentFilters
+                        )
+                    ],
+                    model=PaymentFilters,
+                    sortby="created_at",
+                    direction="desc",
+                    limit=1,
+                ),
+            )
+            payment = next(
+                (
+                    payment
+                    for payment in payments
+                    if payment.external_id and payment.fiat_provider == "square"
+                ),
+                None,
+            )
+            if payment and payment.external_id:
+                return payment.external_id
+
+            payments = await get_payments(
+                wallet_id=wallet_id,
+                incoming=True,
+                filters=Filters(
+                    model=PaymentFilters,
+                    sortby="created_at",
+                    direction="desc",
+                ),
+            )
+            payment = next(
+                (
+                    payment
+                    for payment in payments
+                    if payment.external_id
+                    and payment.fiat_provider == "square"
+                    and (payment.extra or {}).get("subscription_request_id")
+                    == subscription_id
+                ),
+                None,
+            )
+            if payment and payment.external_id:
+                return payment.external_id
+        except Exception as exc:
+            logger.warning(exc)
+
+        return subscription_id
+
+    def _settings_connection_fields(self) -> str:
+        return "-".join(
+            [
+                str(settings.square_api_endpoint),
+                str(settings.square_access_token),
+                str(settings.square_location_id),
+                str(settings.square_api_version),
+            ]
+        )

lnbits/settings.py

@@ -698,6 +698,35 @@ class PayPalFiatProvider(LNbitsSettings):
     paypal_limits: FiatProviderLimits = Field(default_factory=FiatProviderLimits)
 
 
+class SquareFiatProvider(LNbitsSettings):
+    square_enabled: bool = Field(default=False)
+    square_api_endpoint: str = Field(default="https://connect.squareup.com")
+    square_access_token: str | None = Field(default=None)
+    square_location_id: str | None = Field(default=None)
+    square_api_version: str = Field(default="2026-01-22")
+    square_payment_success_url: str = Field(default="https://lnbits.com")
+    square_payment_webhook_url: str = Field(
+        default="https://your-lnbits-domain-here.com/api/v1/callback/square"
+    )
+    square_webhook_signature_key: str | None = Field(default=None)
+
+    square_limits: FiatProviderLimits = Field(default_factory=FiatProviderLimits)
+
+
+class RevolutFiatProvider(LNbitsSettings):
+    revolut_enabled: bool = Field(default=False)
+    revolut_api_endpoint: str = Field(default="https://merchant.revolut.com")
+    revolut_api_secret_key: str | None = Field(default=None)
+    revolut_api_version: str = Field(default="2026-04-20")
+    revolut_payment_success_url: str = Field(default="https://lnbits.com")
+    revolut_payment_webhook_url: str = Field(
+        default="https://your-lnbits-domain-here.com/api/v1/callback/revolut"
+    )
+    revolut_webhook_signing_secret: str | None = Field(default=None)
+
+    revolut_limits: FiatProviderLimits = Field(default_factory=FiatProviderLimits)
+
+
 class LightningSettings(LNbitsSettings):
     lightning_invoice_expiry: int = Field(default=3600, gt=0)
 
@@ -735,7 +764,12 @@ class FundingSourcesSettings(
     funding_source_max_retries: int = Field(default=4, ge=0)
 
 
-class FiatProvidersSettings(StripeFiatProvider, PayPalFiatProvider):
+class FiatProvidersSettings(
+    StripeFiatProvider,
+    PayPalFiatProvider,
+    SquareFiatProvider,
+    RevolutFiatProvider,
+):
     def is_fiat_provider_enabled(self, provider: str | None) -> bool:
         """
         Checks if a specific fiat provider is enabled.
@@ -746,6 +780,10 @@ class FiatProvidersSettings(StripeFiatProvider, PayPalFiatProvider):
             return self.stripe_enabled
         if provider == "paypal":
             return self.paypal_enabled
+        if provider == "square":
+            return self.square_enabled
+        if provider == "revolut":
+            return self.revolut_enabled
         return False
 
     def get_fiat_providers_for_user(self, user_id: str) -> list[str]:
@@ -765,6 +803,18 @@ class FiatProvidersSettings(StripeFiatProvider, PayPalFiatProvider):
         ):
             allowed_providers.append("paypal")
 
+        if self.square_enabled and (
+            not self.square_limits.allowed_users
+            or user_id in self.square_limits.allowed_users
+        ):
+            allowed_providers.append("square")
+
+        if self.revolut_enabled and (
+            not self.revolut_limits.allowed_users
+            or user_id in self.revolut_limits.allowed_users
+        ):
+            allowed_providers.append("revolut")
+
         return allowed_providers
 
     def get_fiat_provider_limits(self, provider_name: str) -> FiatProviderLimits | None:

lnbits/static/i18n/en.js

@@ -267,6 +267,15 @@ window.localisation.en = {
   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.',
+  webhook_square_description:
+    'On the Square side configure a webhook pointing to this exact LNbits URL.',
+  square_webhook_url_hint:
+    'Must exactly match the Square notification URL. LNbits requires the /api/v1/callback/square path.',
+  access_token: 'Access Token',
+  location_id: 'Location ID',
+  square_location_id_hint:
+    'Square location ID to create payment links for. Use the endpoint to select sandbox or production.',
+  api_version: 'API Version',
   payment_proof: 'Payment Proof',
   update: 'Update',
   update_available: 'Update {version} available!',
@@ -805,6 +814,8 @@ window.localisation.en = {
   webhook_id_hint: 'PayPal webhook ID used to verify incoming events.',
   webhook_paypal_description:
     'On the PayPal side configure a webhook pointing to your LNbits server.',
+  square_webhook_signature_key_hint:
+    'Square webhook signature key used to verify incoming events.',
   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/components/admin/lnbits-admin-fiat-providers.js

@@ -5,6 +5,9 @@ window.app.component('lnbits-admin-fiat-providers', {
     return {
       formAddStripeUser: '',
       formAddPaypalUser: '',
+      formAddSquareUser: '',
+      formAddRevolutUser: '',
+      creatingRevolutWebhook: false,
       hideInputToggle: true
     }
   },
@@ -20,6 +23,12 @@ window.app.component('lnbits-admin-fiat-providers', {
         this.formData?.paypal_payment_webhook_url ||
         this.calculateWebhookUrl('paypal')
       )
+    },
+    revolutWebhookUrl() {
+      return (
+        this.formData?.revolut_payment_webhook_url ||
+        this.calculateWebhookUrl('revolut')
+      )
     }
   },
   watch: {
@@ -58,6 +67,8 @@ window.app.component('lnbits-admin-fiat-providers', {
     syncWebhookUrls() {
       this.maybeSetWebhookUrl('stripe_payment_webhook_url', 'stripe')
       this.maybeSetWebhookUrl('paypal_payment_webhook_url', 'paypal')
+      this.maybeSetWebhookUrl('square_payment_webhook_url', 'square')
+      this.maybeSetWebhookUrl('revolut_payment_webhook_url', 'revolut')
     },
     maybeSetWebhookUrl(fieldName, provider) {
       if (!this.formData) {
@@ -77,6 +88,47 @@ window.app.component('lnbits-admin-fiat-providers', {
       }
       this.copyText(url)
     },
+    isClearnetWebhookUrl(url) {
+      let parsedUrl
+      try {
+        parsedUrl = new URL(url)
+      } catch (e) {
+        return false
+      }
+
+      const host = parsedUrl.hostname.toLowerCase()
+      if (!['http:', 'https:'].includes(parsedUrl.protocol)) {
+        return false
+      }
+      if (
+        host === 'localhost' ||
+        host.endsWith('.localhost') ||
+        host.endsWith('.local') ||
+        host.endsWith('.onion')
+      ) {
+        return false
+      }
+      if (
+        /^127\./.test(host) ||
+        /^10\./.test(host) ||
+        /^192\.168\./.test(host) ||
+        /^169\.254\./.test(host) ||
+        /^172\.(1[6-9]|2\d|3[0-1])\./.test(host) ||
+        host === '0.0.0.0' ||
+        host === '::1'
+      ) {
+        return false
+      }
+      return true
+    },
+    notifyRevolutWebhookWarning(message) {
+      Quasar.Notify.create({
+        type: 'warning',
+        message,
+        icon: null,
+        closeBtn: true
+      })
+    },
     addStripeAllowedUser() {
       const addUser = this.formAddStripeUser || ''
       if (
@@ -111,6 +163,40 @@ window.app.component('lnbits-admin-fiat-providers', {
       this.formData.paypal_limits.allowed_users =
         this.formData.paypal_limits.allowed_users.filter(u => u !== user)
     },
+    addSquareAllowedUser() {
+      const addUser = this.formAddSquareUser || ''
+      if (
+        addUser.length &&
+        !this.formData.square_limits.allowed_users.includes(addUser)
+      ) {
+        this.formData.square_limits.allowed_users = [
+          ...this.formData.square_limits.allowed_users,
+          addUser
+        ]
+        this.formAddSquareUser = ''
+      }
+    },
+    removeSquareAllowedUser(user) {
+      this.formData.square_limits.allowed_users =
+        this.formData.square_limits.allowed_users.filter(u => u !== user)
+    },
+    addRevolutAllowedUser() {
+      const addUser = this.formAddRevolutUser || ''
+      if (
+        addUser.length &&
+        !this.formData.revolut_limits.allowed_users.includes(addUser)
+      ) {
+        this.formData.revolut_limits.allowed_users = [
+          ...this.formData.revolut_limits.allowed_users,
+          addUser
+        ]
+        this.formAddRevolutUser = ''
+      }
+    },
+    removeRevolutAllowedUser(user) {
+      this.formData.revolut_limits.allowed_users =
+        this.formData.revolut_limits.allowed_users.filter(u => u !== user)
+    },
     checkFiatProvider(providerName) {
       LNbits.api
         .request('PUT', `/api/v1/fiat/check/${providerName}`)
@@ -124,6 +210,48 @@ window.app.component('lnbits-admin-fiat-providers', {
           })
         })
         .catch(LNbits.utils.notifyApiError)
+    },
+    createRevolutWebhook() {
+      const webhookUrl = this.calculateWebhookUrl('revolut')
+      this.formData.revolut_payment_webhook_url = webhookUrl
+
+      if (!this.formData.revolut_api_secret_key) {
+        this.notifyRevolutWebhookWarning(
+          'Add your Revolut API secret key before creating a webhook.'
+        )
+        return
+      }
+      if (!this.isClearnetWebhookUrl(webhookUrl)) {
+        this.notifyRevolutWebhookWarning(
+          'Revolut webhook URL must be a clearnet URL.'
+        )
+        return
+      }
+
+      this.creatingRevolutWebhook = true
+      LNbits.api
+        .request('POST', '/api/v1/fiat/revolut/webhook', null, {
+          url: webhookUrl,
+          endpoint: this.formData.revolut_api_endpoint,
+          api_secret_key: this.formData.revolut_api_secret_key,
+          api_version: this.formData.revolut_api_version
+        })
+        .then(response => {
+          const data = response.data
+          this.formData.revolut_payment_webhook_url = data.url
+          this.formData.revolut_webhook_signing_secret = data.signing_secret
+          Quasar.Notify.create({
+            type: 'positive',
+            message: `Revolut webhook ${
+              data.already_exists ? 'already exists' : 'created'
+            }${data.id ? `: ${data.id}` : ''}.`,
+            icon: null
+          })
+        })
+        .catch(LNbits.utils.notifyApiError)
+        .finally(() => {
+          this.creatingRevolutWebhook = false
+        })
     }
   }
 })

lnbits/templates/components/admin/fiat_providers.vue

@@ -587,12 +587,544 @@
             <q-item-section> Square </q-item-section>
 
             <q-item-section side>
-              <div class="row items-center">Disabled</div>
+              <div class="row items-center">
+                <q-toggle
+                  size="md"
+                  :label="$t('enabled')"
+                  v-model="formData.square_enabled"
+                  color="green"
+                  unchecked-icon="clear"
+                />
+              </div>
             </q-item-section>
           </template>
 
-          <q-card>
-            <q-card-section> Coming Soon </q-card-section>
+          <q-card class="q-pb-xl">
+            <q-expansion-item :label="$t('api')" default-opened>
+              <q-card-section class="q-pa-md">
+                <q-input
+                  filled
+                  type="text"
+                  v-model="formData.square_api_endpoint"
+                  :label="$t('endpoint')"
+                ></q-input>
+                <q-input
+                  filled
+                  class="q-mt-md"
+                  :type="hideInputToggle ? 'password' : 'text'"
+                  v-model="formData.square_access_token"
+                  :label="$t('access_token')"
+                ></q-input>
+                <q-input
+                  filled
+                  class="q-mt-md"
+                  type="text"
+                  v-model="formData.square_location_id"
+                  :label="$t('location_id')"
+                  :hint="$t('square_location_id_hint')"
+                ></q-input>
+                <q-input
+                  filled
+                  class="q-mt-md"
+                  type="text"
+                  v-model="formData.square_api_version"
+                  :label="$t('api_version')"
+                ></q-input>
+                <q-input
+                  filled
+                  class="q-mt-md"
+                  type="text"
+                  v-model="formData.square_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="$t('check_connection')"
+                      @click="checkFiatProvider('square')"
+                    ></q-btn>
+                  </div>
+                </div>
+              </q-card-section>
+            </q-expansion-item>
+
+            <q-expansion-item :label="$t('webhook')" default-opened>
+              <q-card-section>
+                <span v-text="$t('webhook_square_description')"></span>
+              </q-card-section>
+              <q-card-section>
+                <div class="row items-center q-gutter-sm q-mt-md">
+                  <div class="col">
+                    <q-input
+                      filled
+                      type="text"
+                      v-model="formData.square_payment_webhook_url"
+                      :label="$t('webhook_url')"
+                      :hint="$t('square_webhook_url_hint')"
+                    ></q-input>
+                  </div>
+                  <div class="col-auto">
+                    <q-btn
+                      outline
+                      color="grey"
+                      icon="content_copy"
+                      @click="
+                        copyWebhookUrl(formData.square_payment_webhook_url)
+                      "
+                      :aria-label="$t('copy_webhook_url')"
+                    >
+                      <q-tooltip>
+                        <span v-text="$t('copy_webhook_url')"></span>
+                      </q-tooltip>
+                    </q-btn>
+                  </div>
+                </div>
+                <q-input
+                  filled
+                  class="q-mt-md"
+                  :type="hideInputToggle ? 'password' : 'text'"
+                  v-model="formData.square_webhook_signature_key"
+                  :label="$t('signing_secret')"
+                  :hint="$t('square_webhook_signature_key_hint')"
+                ></q-input>
+              </q-card-section>
+              <q-card-section>
+                <span v-text="$t('webhook_events_list')"></span>
+                <ul>
+                  <li><code>payment.updated</code></li>
+                  <li><code>invoice.payment_made</code></li>
+                </ul>
+              </q-card-section>
+            </q-expansion-item>
+
+            <q-expansion-item :label="$t('service_fee')">
+              <q-card-section>
+                <div class="row">
+                  <div class="col-md-4 col-sm-12">
+                    <q-input
+                      filled
+                      class="q-ma-sm"
+                      type="number"
+                      min="0"
+                      v-model="formData.square_limits.service_fee_percent"
+                      @update:model-value="formData.touch = null"
+                      :label="$t('service_fee_label')"
+                      :hint="$t('service_fee_hint')"
+                    ></q-input>
+                  </div>
+                  <div class="col-md-4 col-sm-12">
+                    <q-input
+                      filled
+                      class="q-ma-sm"
+                      type="number"
+                      min="0"
+                      v-model="formData.square_limits.service_max_fee_sats"
+                      @update:model-value="formData.touch = null"
+                      :label="$t('service_fee_max')"
+                      :hint="$t('service_fee_max_hint')"
+                    ></q-input>
+                  </div>
+                  <div class="col-md-4 col-sm-12">
+                    <q-input
+                      filled
+                      class="q-ma-sm"
+                      type="text"
+                      v-model="formData.square_limits.service_fee_wallet_id"
+                      @update:model-value="formData.touch = null"
+                      :label="$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.square_limits.service_min_amount_sats"
+                      @update:model-value="formData.touch = null"
+                      :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.square_limits.service_max_amount_sats"
+                      @update:model-value="formData.touch = null"
+                      :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.square_limits.service_faucet_wallet_id"
+                      @update:model-value="formData.touch = null"
+                      :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: 'square'
+                              })
+                            "
+                          ></span>
+                        </li>
+                        <li>
+                          <span
+                            v-text="
+                              $t('faucest_wallet_desc_2', {
+                                provider: 'square'
+                              })
+                            "
+                          ></span>
+                        </li>
+                        <li>
+                          <span v-text="$t('faucest_wallet_desc_3')"></span>
+                        </li>
+                        <li>
+                          <span
+                            v-text="
+                              $t('faucest_wallet_desc_4', {
+                                provider: 'square'
+                              })
+                            "
+                          ></span>
+                        </li>
+                        <li>
+                          <span v-text="$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="$t('allowed_users')">
+              <q-card-section>
+                <q-input
+                  filled
+                  v-model="formAddSquareUser"
+                  @keydown.enter="addSquareAllowedUser"
+                  type="text"
+                  :label="$t('allowed_users_label')"
+                  :hint="
+                    $t('allowed_users_hint_feature', {
+                      feature: 'Square'
+                    })
+                  "
+                >
+                  <q-btn
+                    @click="addSquareAllowedUser"
+                    dense
+                    flat
+                    icon="add"
+                  ></q-btn>
+                </q-input>
+                <div>
+                  <q-chip
+                    v-for="user in formData.square_limits.allowed_users"
+                    @update:model-value="formData.touch = null"
+                    :key="user"
+                    removable
+                    @remove="removeSquareAllowedUser(user)"
+                    color="primary"
+                    text-color="white"
+                    :label="user"
+                    class="ellipsis"
+                  >
+                  </q-chip>
+                </div>
+              </q-card-section>
+            </q-expansion-item>
+          </q-card>
+        </q-expansion-item>
+        <q-separator></q-separator>
+        <q-expansion-item header-class="text-primary text-bold">
+          <template v-slot:header>
+            <q-item-section avatar>
+              <q-avatar color="deep-orange-7" text-color="white">R</q-avatar>
+            </q-item-section>
+
+            <q-item-section> Revolut </q-item-section>
+
+            <q-item-section side>
+              <div class="row items-center">
+                <q-toggle
+                  size="md"
+                  :label="$t('enabled')"
+                  v-model="formData.revolut_enabled"
+                  color="green"
+                  unchecked-icon="clear"
+                />
+              </div>
+            </q-item-section>
+          </template>
+
+          <q-card class="q-pb-xl">
+            <q-expansion-item :label="$t('api')" default-opened>
+              <q-card-section class="q-pa-md">
+                <q-input
+                  filled
+                  type="text"
+                  v-model="formData.revolut_api_endpoint"
+                  :label="$t('endpoint')"
+                ></q-input>
+                <q-input
+                  filled
+                  class="q-mt-md"
+                  :type="hideInputToggle ? 'password' : 'text'"
+                  v-model="formData.revolut_api_secret_key"
+                  label="API secret key"
+                ></q-input>
+                <q-input
+                  filled
+                  class="q-mt-md"
+                  type="text"
+                  v-model="formData.revolut_api_version"
+                  :label="$t('api_version')"
+                ></q-input>
+                <q-input
+                  filled
+                  class="q-mt-md"
+                  type="text"
+                  v-model="formData.revolut_payment_success_url"
+                  :label="$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('revolut')"
+                    ></q-btn>
+                  </div>
+                </div>
+              </q-card-section>
+            </q-expansion-item>
+
+            <q-expansion-item :label="$t('webhook')" default-opened>
+              <q-card-section>
+                Configure a Revolut Merchant webhook that points to your LNbits
+                server. LNbits will create it through the Revolut API and
+                subscribe to <code>ORDER_AUTHORISED</code>,
+                <code>ORDER_COMPLETED</code>, and
+                <code>SUBSCRIPTION_INITIATED</code>.
+              </q-card-section>
+              <q-card-section>
+                <div class="row items-center q-gutter-sm q-mt-md">
+                  <div class="col">
+                    <q-input
+                      filled
+                      type="text"
+                      disable
+                      :model-value="revolutWebhookUrl"
+                      :label="$t('webhook_url')"
+                      readonly
+                    ></q-input>
+                  </div>
+                  <div class="col-auto">
+                    <q-btn
+                      outline
+                      color="grey"
+                      icon="content_copy"
+                      @click="copyWebhookUrl(revolutWebhookUrl)"
+                      :aria-label="$t('copy_webhook_url')"
+                    >
+                      <q-tooltip>
+                        <span v-text="$t('copy_webhook_url')"></span>
+                      </q-tooltip>
+                    </q-btn>
+                  </div>
+                </div>
+                <div class="row items-center q-gutter-sm q-mt-md">
+                  <q-btn
+                    type="button"
+                    color="primary"
+                    icon="add_link"
+                    label="Create webhook"
+                    :loading="creatingRevolutWebhook"
+                    @click="createRevolutWebhook"
+                  ></q-btn>
+                  <q-chip
+                    v-if="formData.revolut_webhook_signing_secret"
+                    dense
+                    color="positive"
+                    text-color="white"
+                    icon="verified"
+                  >
+                    Signing secret saved
+                  </q-chip>
+                </div>
+              </q-card-section>
+              <q-card-section>
+                <span v-text="$t('webhook_events_list')"></span>
+                <ul>
+                  <li>
+                    <code>ORDER_AUTHORISED</code>
+                  </li>
+                  <li>
+                    <code>ORDER_COMPLETED</code>
+                  </li>
+                  <li>
+                    <code>SUBSCRIPTION_INITIATED</code>
+                  </li>
+                </ul>
+              </q-card-section>
+            </q-expansion-item>
+
+            <q-expansion-item :label="$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.revolut_limits.service_fee_percent"
+                      @update:model-value="formData.touch = null"
+                      :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.revolut_limits.service_max_fee_sats"
+                      @update:model-value="formData.touch = null"
+                      :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.revolut_limits.service_fee_wallet_id"
+                      @update:model-value="formData.touch = null"
+                      :label="$t('fee_wallet_label')"
+                      :hint="$t('fee_wallet_hint')"
+                    ></q-input>
+                  </div>
+                </div>
+              </q-card-section>
+            </q-expansion-item>
+
+            <q-expansion-item :label="$t('amount_limits')">
+              <q-card-section>
+                <div class="row">
+                  <div class="col-md-4 col-sm-12">
+                    <q-input
+                      filled
+                      class="q-ma-sm"
+                      type="number"
+                      min="0"
+                      v-model="formData.revolut_limits.service_min_amount_sats"
+                      @update:model-value="formData.touch = null"
+                      :label="$t('min_incoming_payment_amount')"
+                      :hint="$t('min_incoming_payment_amount_desc')"
+                    ></q-input>
+                  </div>
+                  <div class="col-md-4 col-sm-12">
+                    <q-input
+                      filled
+                      class="q-ma-sm"
+                      type="number"
+                      min="0"
+                      v-model="formData.revolut_limits.service_max_amount_sats"
+                      @update:model-value="formData.touch = null"
+                      :label="$t('max_incoming_payment_amount')"
+                      :hint="$t('max_incoming_payment_amount_desc')"
+                    ></q-input>
+                  </div>
+                  <div class="col-md-4 col-sm-12">
+                    <q-input
+                      filled
+                      class="q-ma-sm"
+                      v-model="formData.revolut_limits.service_faucet_wallet_id"
+                      @update:model-value="formData.touch = null"
+                      :label="$t('faucest_wallet_id')"
+                      :hint="$t('faucest_wallet_id_hint')"
+                    ></q-input>
+                  </div>
+                </div>
+              </q-card-section>
+            </q-expansion-item>
+
+            <q-expansion-item :label="$t('allowed_users')">
+              <q-card-section>
+                <q-input
+                  filled
+                  v-model="formAddRevolutUser"
+                  @keydown.enter="addRevolutAllowedUser"
+                  type="text"
+                  :label="$t('allowed_users_label')"
+                  :hint="
+                    $t('allowed_users_hint_feature', {
+                      feature: 'Revolut'
+                    })
+                  "
+                >
+                  <q-btn
+                    @click="addRevolutAllowedUser"
+                    dense
+                    flat
+                    icon="add"
+                  ></q-btn>
+                </q-input>
+                <div>
+                  <q-chip
+                    v-for="user in formData.revolut_limits.allowed_users"
+                    @update:model-value="formData.touch = null"
+                    :key="user"
+                    removable
+                    @remove="removeRevolutAllowedUser(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-list>
@@ -640,9 +1172,22 @@
             >
           </div>
           <div class="row items-center q-gutter-sm">
-            <div class="text-bold" style="min-width: 140px">
-              Square (coming soon)
-            </div>
+            <div class="text-bold" style="min-width: 140px">Square</div>
+            <q-chip dense color="positive" text-color="white" icon="check"
+              >Checkout</q-chip
+            >
+            <q-chip dense color="warning" text-color="black" icon="schedule"
+              >Subscriptions coming soon</q-chip
+            >
+            <q-chip dense color="negative" text-color="white" icon="close"
+              >Tap-to-pay</q-chip
+            >
+            <q-chip dense color="grey-9" text-color="white" icon="public"
+              >Regions: Square-supported countries</q-chip
+            >
+          </div>
+          <div class="row items-center q-gutter-sm">
+            <div class="text-bold" style="min-width: 140px">Revolut</div>
             <q-chip dense color="positive" text-color="white" icon="check"
               >Checkout</q-chip
             >
@@ -653,7 +1198,7 @@
               >Tap-to-pay</q-chip
             >
             <q-chip dense color="grey-9" text-color="white" icon="public"
-              >Regions: Global</q-chip
+              >Regions: Revolut-supported countries</q-chip
             >
           </div>
         </div>

lnbits/templates/pages/wallet.vue

@@ -394,6 +394,44 @@
                 <span v-text="$t('pay_with', {provider: 'PayPal'})"></span>
               </q-item-section>
             </q-item>
+            <q-separator
+              v-if="g.user.fiat_providers?.includes('square')"
+            ></q-separator>
+            <q-item
+              v-if="g.user.fiat_providers?.includes('square')"
+              :active="receive.fiatProvider === 'square'"
+              @click="receive.fiatProvider = 'square'"
+              active-class="bg-teal-1 text-grey-8 text-weight-bold"
+              clickable
+              v-ripple
+            >
+              <q-item-section avatar>
+                <q-avatar>
+                  <q-img src="/static/images/square_logo.png"></q-img>
+                </q-avatar>
+              </q-item-section>
+              <q-item-section>
+                <span v-text="$t('pay_with', {provider: 'Square'})"></span>
+              </q-item-section>
+            </q-item>
+            <q-separator
+              v-if="g.user.fiat_providers?.includes('revolut')"
+            ></q-separator>
+            <q-item
+              v-if="g.user.fiat_providers?.includes('revolut')"
+              :active="receive.fiatProvider === 'revolut'"
+              @click="receive.fiatProvider = 'revolut'"
+              active-class="bg-teal-1 text-grey-8 text-weight-bold"
+              clickable
+              v-ripple
+            >
+              <q-item-section avatar>
+                <q-avatar color="deep-orange-7" text-color="white">R</q-avatar>
+              </q-item-section>
+              <q-item-section>
+                <span v-text="$t('pay_with', {provider: 'Revolut'})"></span>
+              </q-item-section>
+            </q-item>
           </q-list>
         </div>
 

tests/api/test_callback_api.py

@@ -4,13 +4,18 @@ from uuid import uuid4
 import pytest
 from httpx import AsyncClient
 
-from lnbits.core.models import Account, CreateInvoice
+from lnbits.core.models import Account, CreateInvoice, Payment
 from lnbits.core.services.payments import create_wallet_invoice
 from lnbits.core.services.users import create_user_account
 from lnbits.core.views.callback_api import (
     handle_paypal_event,
+    handle_revolut_event,
+    handle_square_event,
     handle_stripe_event,
 )
+from lnbits.fiat.revolut import RevolutWallet
+from lnbits.fiat.square import SquareWallet
+from lnbits.settings import Settings
 
 
 @pytest.mark.anyio
@@ -23,7 +28,15 @@ async def test_callback_api_generic_webhook_handler_routes_providers(
     paypal_mock = mocker.patch(
         "lnbits.core.views.callback_api.handle_paypal_event", mocker.AsyncMock()
     )
+    square_mock = mocker.patch(
+        "lnbits.core.views.callback_api.handle_square_event", mocker.AsyncMock()
+    )
+    revolut_mock = mocker.patch(
+        "lnbits.core.views.callback_api.handle_revolut_event", mocker.AsyncMock()
+    )
     mocker.patch("lnbits.core.views.callback_api.check_stripe_signature")
+    mocker.patch("lnbits.core.views.callback_api.check_square_signature")
+    mocker.patch("lnbits.core.views.callback_api.check_revolut_signature")
     mocker.patch(
         "lnbits.core.views.callback_api.verify_paypal_webhook", mocker.AsyncMock()
     )
@@ -45,6 +58,27 @@ async def test_callback_api_generic_webhook_handler_routes_providers(
     assert paypal.json()["success"] is True
     paypal_mock.assert_awaited_once()
 
+    square = await http_client.post(
+        "/api/v1/callback/square",
+        headers={"x-square-hmacsha256-signature": "sig"},
+        json={"event_id": "evt_3", "type": "payment.updated"},
+    )
+    assert square.status_code == 200
+    assert square.json()["success"] is True
+    square_mock.assert_awaited_once()
+
+    revolut = await http_client.post(
+        "/api/v1/callback/revolut",
+        headers={
+            "Revolut-Signature": "sig",
+            "Revolut-Request-Timestamp": "1700000000",
+        },
+        json={"event": "ORDER_COMPLETED", "order_id": "order_1"},
+    )
+    assert revolut.status_code == 200
+    assert revolut.json()["success"] is True
+    revolut_mock.assert_awaited_once()
+
     unknown = await http_client.post("/api/v1/callback/unknown", json={"id": "evt_3"})
     assert unknown.status_code == 200
     assert unknown.json()["success"] is False
@@ -95,7 +129,258 @@ async def test_callback_api_handles_paid_events_with_real_payments(mocker):
 
 
 @pytest.mark.anyio
-async def test_callback_api_handles_subscription_flows_and_validation(mocker):
+async def test_callback_api_handles_square_paid_events(mocker):
+    payment = mocker.Mock()
+    get_payment = mocker.patch(
+        "lnbits.core.views.callback_api.get_standalone_payment",
+        mocker.AsyncMock(return_value=payment),
+    )
+    fiat_status_mock = mocker.patch(
+        "lnbits.core.views.callback_api.check_fiat_status", mocker.AsyncMock()
+    )
+
+    await handle_square_event(
+        {
+            "event_id": "evt_square",
+            "type": "payment.updated",
+            "data": {
+                "object": {
+                    "payment": {
+                        "id": "payment_1",
+                        "order_id": "order_1",
+                        "status": "COMPLETED",
+                    }
+                }
+            },
+        }
+    )
+
+    get_payment.assert_awaited_once_with("fiat_square_order_order_1")
+    fiat_status_mock.assert_awaited_once_with(payment)
+
+
+@pytest.mark.anyio
+async def test_callback_api_handles_revolut_paid_events(mocker):
+    payment = mocker.Mock()
+    get_payment = mocker.patch(
+        "lnbits.core.views.callback_api.get_standalone_payment",
+        mocker.AsyncMock(return_value=payment),
+    )
+    fiat_status_mock = mocker.patch(
+        "lnbits.core.views.callback_api.check_fiat_status", mocker.AsyncMock()
+    )
+
+    await handle_revolut_event(
+        {
+            "event": "ORDER_COMPLETED",
+            "order_id": "order_1",
+        }
+    )
+
+    get_payment.assert_awaited_once_with("fiat_revolut_order_order_1")
+    fiat_status_mock.assert_awaited_once_with(payment)
+
+
+@pytest.mark.anyio
+async def test_callback_api_handles_revolut_subscription_event(
+    mocker, settings: Settings
+):
+    wallet_id = "wallet_1"
+    payment = mocker.Mock()
+    payment.extra = {}
+    payment.msat = 925_000
+
+    settings.revolut_api_endpoint = "https://sandbox-merchant.revolut.com"
+    settings.revolut_api_secret_key = "revolut-secret"
+    settings.revolut_api_version = "2026-04-20"
+    revolut_provider = RevolutWallet()
+    mocker.patch.object(
+        revolut_provider,
+        "get_subscription",
+        return_value={
+            "id": "SUBSCRIPTION_1",
+            "current_cycle_id": "CYCLE_1",
+            "external_reference": json.dumps(
+                {
+                    "wallet_id": wallet_id,
+                    "tag": "members",
+                    "subscription_request_id": "request_1",
+                    "extra": {"link": "link-1", "customer_id": "customer_1"},
+                    "memo": "Revolut Members",
+                }
+            ),
+        },
+    )
+    mocker.patch.object(
+        revolut_provider,
+        "get_subscription_cycle",
+        return_value={"id": "CYCLE_1", "order_id": "ORDER_SUB_1"},
+    )
+    mocker.patch.object(
+        revolut_provider,
+        "get_order",
+        return_value={
+            "id": "ORDER_SUB_1",
+            "amount": 925,
+            "currency": "USD",
+            "checkout_url": "https://checkout.revolut.com/payment-link/sub_1",
+        },
+    )
+    mocker.patch(
+        "lnbits.core.views.callback_api.get_fiat_provider",
+        mocker.AsyncMock(return_value=revolut_provider),
+    )
+    mocker.patch(
+        "lnbits.core.views.callback_api.get_standalone_payment",
+        mocker.AsyncMock(side_effect=[None]),
+    )
+    create_wallet_invoice_mock = mocker.patch(
+        "lnbits.core.views.callback_api.create_wallet_invoice",
+        mocker.AsyncMock(return_value=payment),
+    )
+    mocker.patch("lnbits.core.views.callback_api.service_fee_fiat", return_value=2)
+    update_payment_mock = mocker.patch(
+        "lnbits.core.views.callback_api.update_payment", mocker.AsyncMock()
+    )
+    fiat_status_mock = mocker.patch(
+        "lnbits.core.views.callback_api.check_fiat_status", mocker.AsyncMock()
+    )
+
+    await handle_revolut_event(
+        {
+            "event": "SUBSCRIPTION_INITIATED",
+            "subscription_id": "SUBSCRIPTION_1",
+        }
+    )
+
+    assert create_wallet_invoice_mock.await_count == 1
+    called_wallet_id, invoice = create_wallet_invoice_mock.await_args.args
+    assert called_wallet_id == "wallet_1"
+    assert invoice.amount == 9.25
+    assert invoice.memo == "Revolut Members"
+    assert invoice.external_id == "SUBSCRIPTION_1"
+    assert invoice.internal is True
+    assert invoice.extra["fiat_method"] == "subscription"
+    assert invoice.extra["subscription"]["checking_id"] == "order_ORDER_SUB_1"
+    assert payment.fiat_provider == "revolut"
+    assert payment.fee == -2
+    assert payment.extra["fiat_checking_id"] == "order_ORDER_SUB_1"
+    assert payment.checking_id == "fiat_revolut_order_ORDER_SUB_1"
+    update_payment_mock.assert_awaited_once_with(
+        payment, "fiat_revolut_order_ORDER_SUB_1"
+    )
+    fiat_status_mock.assert_awaited_once_with(payment)
+
+
+@pytest.mark.anyio
+async def test_callback_api_handles_revolut_subscription_order_event(
+    mocker, settings: Settings
+):
+    wallet_id = "wallet_1"
+    payment = mocker.Mock()
+    payment.extra = {}
+    payment.msat = 925_000
+
+    settings.revolut_api_endpoint = "https://sandbox-merchant.revolut.com"
+    settings.revolut_api_secret_key = "revolut-secret"
+    settings.revolut_api_version = "2026-04-20"
+    revolut_provider = RevolutWallet()
+    subscription = {
+        "id": "SUBSCRIPTION_1",
+        "state": "active",
+        "current_cycle_id": "CYCLE_1",
+        "external_reference": json.dumps(
+            {
+                "wallet_id": wallet_id,
+                "tag": "members",
+                "subscription_request_id": "request_1",
+                "extra": {"link": "link-1"},
+                "memo": "Revolut Members",
+            }
+        ),
+    }
+    order = {
+        "id": "ORDER_SUB_1",
+        "type": "payment",
+        "state": "completed",
+        "amount": 925,
+        "currency": "USD",
+        "checkout_url": "https://checkout.revolut.com/payment-link/sub_1",
+        "channel_data": {
+            "subscription_id": "SUBSCRIPTION_1",
+            "subscription_cycle_id": "CYCLE_1",
+        },
+    }
+    get_order_mock = mocker.patch.object(
+        revolut_provider, "get_order", side_effect=[order, order]
+    )
+    get_subscription_mock = mocker.patch.object(
+        revolut_provider,
+        "get_subscription",
+        return_value=subscription,
+    )
+    mocker.patch.object(
+        revolut_provider,
+        "get_subscription_cycle",
+        return_value={"id": "CYCLE_1", "order_id": "ORDER_SUB_1"},
+    )
+    mocker.patch(
+        "lnbits.core.views.callback_api.get_fiat_provider",
+        mocker.AsyncMock(return_value=revolut_provider),
+    )
+    get_payment_mock = mocker.patch(
+        "lnbits.core.views.callback_api.get_standalone_payment",
+        mocker.AsyncMock(side_effect=[None, None]),
+    )
+    create_wallet_invoice_mock = mocker.patch(
+        "lnbits.core.views.callback_api.create_wallet_invoice",
+        mocker.AsyncMock(return_value=payment),
+    )
+    mocker.patch("lnbits.core.views.callback_api.service_fee_fiat", return_value=2)
+    update_payment_mock = mocker.patch(
+        "lnbits.core.views.callback_api.update_payment", mocker.AsyncMock()
+    )
+    fiat_status_mock = mocker.patch(
+        "lnbits.core.views.callback_api.check_fiat_status", mocker.AsyncMock()
+    )
+
+    await handle_revolut_event(
+        {
+            "event": "ORDER_COMPLETED",
+            "order_id": "ORDER_SUB_1",
+        }
+    )
+
+    assert get_payment_mock.await_count == 2
+    get_payment_mock.assert_any_await("fiat_revolut_order_ORDER_SUB_1")
+    assert get_order_mock.await_count == 2
+    assert [call.args for call in get_subscription_mock.await_args_list] == [
+        ("SUBSCRIPTION_1",),
+        ("SUBSCRIPTION_1",),
+    ]
+    assert create_wallet_invoice_mock.await_count == 1
+    called_wallet_id, invoice = create_wallet_invoice_mock.await_args.args
+    assert called_wallet_id == "wallet_1"
+    assert invoice.amount == 9.25
+    assert invoice.memo == "Revolut Members"
+    assert invoice.external_id == "SUBSCRIPTION_1"
+    assert invoice.internal is True
+    assert invoice.extra["fiat_method"] == "subscription"
+    assert invoice.extra["subscription"]["checking_id"] == "order_ORDER_SUB_1"
+    assert payment.fiat_provider == "revolut"
+    assert payment.fee == -2
+    assert payment.extra["fiat_checking_id"] == "order_ORDER_SUB_1"
+    assert payment.checking_id == "fiat_revolut_order_ORDER_SUB_1"
+    update_payment_mock.assert_awaited_once_with(
+        payment, "fiat_revolut_order_ORDER_SUB_1"
+    )
+    fiat_status_mock.assert_awaited_once_with(payment)
+
+
+@pytest.mark.anyio
+async def test_callback_api_handles_subscription_flows_and_validation(
+    mocker, settings: Settings
+):
     user = await create_user_account(
         Account(
             id=uuid4().hex,
@@ -163,6 +448,99 @@ async def test_callback_api_handles_subscription_flows_and_validation(mocker):
     )
     assert create_fiat_invoice_mock.await_count == 2
 
+    await handle_square_event(
+        {
+            "event_id": "evt_square_subscription",
+            "type": "payment.updated",
+            "data": {
+                "object": {
+                    "payment": {
+                        "id": "PAYMENT_SUB_1",
+                        "order_id": "ORDER_SUB_1",
+                        "status": "COMPLETED",
+                        "amount_money": {"amount": 925, "currency": "USD"},
+                        "note": json.dumps(
+                            [
+                                wallet.id,
+                                "members",
+                                "subscription_square_1",
+                                "link-1",
+                                "Square Members",
+                            ]
+                        ),
+                    }
+                }
+            },
+        }
+    )
+    assert create_fiat_invoice_mock.await_count == 3
+    square_call = create_fiat_invoice_mock.await_args.kwargs
+    assert square_call["wallet_id"] == wallet.id
+    square_invoice = square_call["invoice_data"]
+    assert square_invoice.fiat_provider == "square"
+    assert square_invoice.amount == 9.25
+    assert square_invoice.memo == "Square Members"
+    assert square_invoice.extra["fiat_method"] == "subscription"
+    assert square_invoice.extra["tag"] == "members"
+    assert (
+        square_invoice.extra["subscription"]["checking_id"] == "payment_PAYMENT_SUB_1"
+    )
+
+    payment.extra = {
+        "subscription_request_id": "subscription_square_1",
+        "tag": "members",
+        "link": "link-1",
+    }
+    payment.external_id = "SUBSCRIPTION_1"
+    payment.memo = "Square Members"
+    settings.square_api_endpoint = "https://connect.squareupsandbox.com"
+    settings.square_access_token = "square-token"
+    settings.square_location_id = "LOC123"
+    settings.square_api_version = "2026-01-22"
+    square_provider = SquareWallet()
+    mocker.patch.object(
+        square_provider,
+        "get_payment_for_order",
+        return_value={
+            "id": "PAYMENT_SUB_2",
+            "status": "COMPLETED",
+            "amount_money": {"amount": 925, "currency": "USD"},
+        },
+    )
+    mocker.patch(
+        "lnbits.core.views.callback_api.get_fiat_provider",
+        mocker.AsyncMock(return_value=square_provider),
+    )
+    mocker.patch(
+        "lnbits.core.views.callback_api.get_payments",
+        mocker.AsyncMock(return_value=[payment]),
+    )
+
+    await handle_square_event(
+        {
+            "event_id": "evt_square_invoice",
+            "type": "invoice.payment_made",
+            "data": {
+                "object": {
+                    "invoice": {
+                        "order_id": "ORDER_SUB_2",
+                        "subscription_id": "SUBSCRIPTION_1",
+                        "public_url": "https://square.example/invoice",
+                    }
+                }
+            },
+        }
+    )
+    assert create_fiat_invoice_mock.await_count == 4
+    square_invoice_call = create_fiat_invoice_mock.await_args.kwargs
+    square_invoice = square_invoice_call["invoice_data"]
+    assert square_invoice.external_id == "SUBSCRIPTION_1"
+    assert "square_subscription_id" not in square_invoice.extra
+    assert (
+        square_invoice.extra["subscription"]["payment_request"]
+        == "https://square.example/invoice"
+    )
+
     with pytest.raises(
         ValueError, match="PayPal subscription event missing custom metadata."
     ):
@@ -173,3 +551,83 @@ async def test_callback_api_handles_subscription_flows_and_validation(mocker):
                 "resource": {"amount": {"currency": "USD", "total": "5.00"}},
             }
         )
+
+
+@pytest.mark.anyio
+async def test_square_invoice_payment_updates_existing_subscription_external_id(
+    settings: Settings, mocker
+):
+    payment = Payment(
+        checking_id="fiat_square_payment_PAYMENT_SUB_1",
+        payment_hash="hash_square_subscription",
+        wallet_id="wallet_1",
+        amount=925000,
+        fee=0,
+        bolt11="lnbc1square",
+        fiat_provider="square",
+        extra={
+            "subscription_request_id": "subscription_square_1",
+            "tag": "members",
+            "link": "link-1",
+        },
+        memo="Square Members",
+    )
+    settings.square_api_endpoint = "https://connect.squareupsandbox.com"
+    settings.square_access_token = "square-token"
+    settings.square_location_id = "LOC123"
+    settings.square_api_version = "2026-01-22"
+    square_provider = SquareWallet()
+    mocker.patch.object(
+        square_provider,
+        "get_payment_for_order",
+        return_value={
+            "id": "PAYMENT_SUB_1",
+            "status": "COMPLETED",
+            "amount_money": {"amount": 925, "currency": "USD"},
+        },
+    )
+    mocker.patch(
+        "lnbits.core.views.callback_api.get_fiat_provider",
+        mocker.AsyncMock(return_value=square_provider),
+    )
+    get_standalone_payment_mock = mocker.patch(
+        "lnbits.core.views.callback_api.get_standalone_payment",
+        mocker.AsyncMock(return_value=payment),
+    )
+    update_payment_mock = mocker.patch(
+        "lnbits.core.views.callback_api.update_payment",
+        mocker.AsyncMock(),
+    )
+    get_payments_mock = mocker.patch(
+        "lnbits.core.views.callback_api.get_payments",
+        mocker.AsyncMock(return_value=[]),
+    )
+    create_fiat_invoice_mock = mocker.patch(
+        "lnbits.core.views.callback_api.create_fiat_invoice",
+        mocker.AsyncMock(),
+    )
+    fiat_status_mock = mocker.patch(
+        "lnbits.core.views.callback_api.check_fiat_status", mocker.AsyncMock()
+    )
+
+    await handle_square_event(
+        {
+            "event_id": "evt_square_invoice",
+            "type": "invoice.payment_made",
+            "data": {
+                "object": {
+                    "invoice": {
+                        "order_id": "ORDER_SUB_1",
+                        "subscription_id": "SUBSCRIPTION_1",
+                    }
+                }
+            },
+        }
+    )
+
+    get_standalone_payment_mock.assert_awaited_with("fiat_square_payment_PAYMENT_SUB_1")
+    assert payment.external_id == "SUBSCRIPTION_1"
+    update_payment_mock.assert_awaited_once_with(payment)
+    fiat_status_mock.assert_awaited_once_with(payment)
+    get_payments_mock.assert_not_awaited()
+    create_fiat_invoice_mock.assert_not_awaited()

tests/api/test_fiat_api.py

@@ -4,6 +4,8 @@ from pytest_mock.plugin import MockerFixture
 
 from lnbits.core.models.misc import SimpleStatus
 from lnbits.fiat.base import FiatSubscriptionResponse
+from lnbits.fiat.revolut import REVOLUT_WEBHOOK_EVENTS
+from lnbits.settings import Settings
 
 
 class _UnsetSecret:
@@ -144,3 +146,82 @@ async def test_fiat_api_connection_token_validates_provider_configuration(
     assert ok.status_code == 200
     assert ok.json() == {"secret": "tok_live"}
     assert good_provider.await_count == 1
+
+
+@pytest.mark.anyio
+async def test_fiat_api_creates_revolut_webhook(
+    client: AsyncClient,
+    superuser_token: str,
+    settings: Settings,
+    mocker: MockerFixture,
+):
+    create_webhook = mocker.patch(
+        "lnbits.core.views.fiat_api.RevolutWallet.create_webhook",
+        mocker.AsyncMock(
+            return_value={
+                "id": "webhook_1",
+                "url": "https://lnbits.example/api/v1/callback/revolut",
+                "events": REVOLUT_WEBHOOK_EVENTS,
+                "signing_secret": "whsec_1",
+            }
+        ),
+    )
+
+    response = await client.post(
+        "/api/v1/fiat/revolut/webhook",
+        headers={"Authorization": f"Bearer {superuser_token}"},
+        json={
+            "url": "https://lnbits.example/api/v1/callback/revolut",
+            "endpoint": "https://sandbox-merchant.revolut.com",
+            "api_secret_key": "secret_1",
+            "api_version": "2026-04-20",
+        },
+    )
+
+    assert response.status_code == 200
+    assert response.json() == {
+        "id": "webhook_1",
+        "url": "https://lnbits.example/api/v1/callback/revolut",
+        "events": REVOLUT_WEBHOOK_EVENTS,
+        "signing_secret": "whsec_1",
+        "already_exists": False,
+    }
+    create_webhook.assert_awaited_once_with(
+        url="https://lnbits.example/api/v1/callback/revolut",
+        endpoint="https://sandbox-merchant.revolut.com",
+        api_secret_key="secret_1",
+        api_version="2026-04-20",
+    )
+    assert settings.revolut_payment_webhook_url == (
+        "https://lnbits.example/api/v1/callback/revolut"
+    )
+    assert settings.revolut_webhook_signing_secret == "whsec_1"
+
+
+@pytest.mark.anyio
+async def test_fiat_api_rejects_local_revolut_webhook(
+    client: AsyncClient,
+    superuser_token: str,
+    mocker: MockerFixture,
+):
+    create_webhook = mocker.patch(
+        "lnbits.core.views.fiat_api.RevolutWallet.create_webhook",
+        mocker.AsyncMock(
+            side_effect=ValueError("Revolut webhook URL must be a clearnet URL.")
+        ),
+    )
+
+    response = await client.post(
+        "/api/v1/fiat/revolut/webhook",
+        headers={"Authorization": f"Bearer {superuser_token}"},
+        json={
+            "url": "http://localhost:5000/api/v1/callback/revolut",
+            "endpoint": "https://sandbox-merchant.revolut.com",
+            "api_secret_key": "secret_1",
+            "api_version": "2026-04-20",
+        },
+    )
+
+    assert response.status_code == 400
+    assert response.json()["detail"] == ("Revolut webhook URL must be a clearnet URL.")
+    create_webhook.assert_awaited_once()

tests/api/test_payment_api.py

@@ -4,9 +4,10 @@ from uuid import uuid4
 
 import pytest
 from fastapi import HTTPException
+from pydantic import ValidationError
 
-from lnbits.core.crud.payments import create_payment
-from lnbits.core.models import Account, CreateInvoice, PaymentState
+from lnbits.core.crud.payments import create_payment, get_payments
+from lnbits.core.models import Account, CreateInvoice, PaymentFilters, PaymentState
 from lnbits.core.models.payments import CancelInvoice, CreatePayment, SettleInvoice
 from lnbits.core.models.users import AccountId
 from lnbits.core.models.wallets import KeyType, WalletTypeInfo
@@ -21,7 +22,7 @@ from lnbits.core.views.payment_api import (
     api_payments_settle,
     api_payments_wallets_stats,
 )
-from lnbits.db import Filters
+from lnbits.db import Filter, Filters
 from lnbits.wallets.base import InvoiceResponse
 
 ZERO_AMOUNT_INVOICE = (
@@ -91,6 +92,60 @@ async def test_payment_api_stats_and_all_paginated(admin_user):
     assert second_wallet.id in wallet_ids
 
 
+@pytest.mark.anyio
+async def test_payment_external_id_is_stored_and_validated():
+    user = await create_user_account(
+        Account(
+            id=uuid4().hex,
+            username=f"user_{uuid4().hex[:8]}",
+            email=f"user_{uuid4().hex[:8]}@lnbits.com",
+        )
+    )
+    wallet = user.wallets[0]
+
+    first_payment = await create_wallet_invoice(
+        wallet.id,
+        CreateInvoice(
+            out=False,
+            amount=21,
+            memo="external reference",
+            external_id="provider_payment_123",
+        ),
+    )
+    second_payment = await create_wallet_invoice(
+        wallet.id,
+        CreateInvoice(
+            out=False,
+            amount=22,
+            memo="external reference newest",
+            external_id="provider_payment_123",
+        ),
+    )
+
+    assert first_payment.external_id == "provider_payment_123"
+    assert second_payment.external_id == "provider_payment_123"
+    stored_payments = await get_payments(
+        wallet_id=wallet.id,
+        filters=Filters(
+            filters=[
+                Filter.parse_query(
+                    "external_id", ["provider_payment_123"], PaymentFilters
+                )
+            ],
+            model=PaymentFilters,
+            sortby="created_at",
+            direction="desc",
+        ),
+    )
+    assert [payment.checking_id for payment in stored_payments] == [
+        second_payment.checking_id,
+        first_payment.checking_id,
+    ]
+
+    with pytest.raises(ValidationError, match="Invalid external id"):
+        CreateInvoice(out=False, amount=21, external_id="provider payment 123")
+
+
 @pytest.mark.anyio
 async def test_payment_api_fee_reserve_and_hold_invoice_actions(mocker):
     user = await create_user_account(