refactor: better namespace

lnbits/core/extensions/api.py

@@ -7,7 +7,6 @@ import secrets
 import time
 from collections.abc import Awaitable, Callable, Iterable, Mapping
 from dataclasses import dataclass
-from datetime import datetime
 from functools import wraps
 from typing import Any, TypeVar, cast, get_type_hints
 
@@ -16,37 +15,19 @@ from pydantic import BaseModel
 from lnbits.helpers import sha256s
 
 from .models import (
-    Bolt11Request,
     CreateInvoicePublicRequest,
     CreateInvoiceRequest,
     CreateInvoiceResponse,
-    CurrencyConvertRequest,
-    CurrencyConvertResponse,
-    CurrencyListResponse,
-    CurrencyRateRequest,
-    CurrencyRateResponse,
-    DecodeInvoiceResponse,
     EmptyRequest,
     ExtensionApiRequest,
-    FiatToSatsRequest,
-    FiatToSatsResponse,
     HttpRequest,
     HttpResponse,
-    InvoiceAmountMsatResponse,
-    InvoiceExpiryResponse,
-    InvoiceMemoResponse,
-    InvoicePaymentHashResponse,
     ListUserWalletsResponse,
     LogRequest,
     LogResponse,
     NowResponse,
     RandomIdRequest,
     RandomIdResponse,
-    RandomSecretAndHashRequest,
-    RandomSecretAndHashResponse,
-    SatsToFiatRequest,
-    SatsToFiatResponse,
-    ServerHealthResponse,
     StorageDeleteRequest,
     StorageDeleteResponse,
     StorageGetRequest,
@@ -56,9 +37,6 @@ from .models import (
     StorageSetRequest,
     StorageSetResponse,
     UserWalletSummary,
-    ValidateInvoiceResponse,
-    VerifyPreimageRequest,
-    VerifyPreimageResponse,
 )
 from .storage import (
     storage_delete_row,
@@ -80,6 +58,7 @@ class ExtensionAPIMethodExport:
     method_id: str
     namespace: str
     name: str
+    host_interface: str
     host_name: str
     sdk_name: str
     description: str
@@ -93,6 +72,7 @@ class ExtensionAPIMethod:
     namespace: str
     name: str
     python_name: str
+    host_interface: str
     host_name: str
     sdk_name: str
     description: str
@@ -114,16 +94,18 @@ def extension_api_method(
     host_name: str,
     sdk_name: str,
     description: str,
+    host_interface: str = "host",
     required_permission: str | None = None,
     require_auth: bool = True,
 ) -> Callable[
-    [Callable[[ExtensionAPI, _RequestModel], Awaitable[_ResponseModel]]],
-    Callable[[ExtensionAPI, _RequestModel], Awaitable[_ResponseModel]],
+    [Callable[[Any, _RequestModel], Awaitable[_ResponseModel]]],
+    Callable[[Any, _RequestModel], Awaitable[_ResponseModel]],
 ]:
     export = ExtensionAPIMethodExport(
         method_id=method_id,
         namespace=namespace,
         name=name,
+        host_interface=host_interface,
         host_name=host_name,
         sdk_name=sdk_name,
         description=description,
@@ -132,15 +114,16 @@ def extension_api_method(
     )
 
     def decorator(
-        function: Callable[[ExtensionAPI, _RequestModel], Awaitable[_ResponseModel]],
-    ) -> Callable[[ExtensionAPI, _RequestModel], Awaitable[_ResponseModel]]:
+        function: Callable[[Any, _RequestModel], Awaitable[_ResponseModel]],
+    ) -> Callable[[Any, _RequestModel], Awaitable[_ResponseModel]]:
         @wraps(function)
-        async def wrapper(self: ExtensionAPI, request: _RequestModel) -> _ResponseModel:
-            if require_auth and not self.has_authenticated_context():
+        async def wrapper(self: Any, request: _RequestModel) -> _ResponseModel:
+            api = getattr(self, "api", self)
+            if require_auth and not api.has_authenticated_context():
                 raise PermissionError(
                     f"Extension API method '{method_id}' requires authentication."
                 )
-            self.require_permission(required_permission)
+            api.require_permission(required_permission)
             return await function(self, request)
 
         setattr(wrapper, _EXTENSION_API_METHOD_ATTR, export)
@@ -167,6 +150,9 @@ class ExtensionAPI:
         self.context = context
         self.owner_id = sha256s(user_id) if user_id else owner_id
         self._uuid = secrets.token_urlsafe(12).replace("-", "_")
+        from .api_utils import ExtensionAPIUtils
+
+        self.utils = ExtensionAPIUtils(self)
 
     def __repr__(self) -> str:
         return (
@@ -502,281 +488,6 @@ class ExtensionAPI:
         log("extension:%s %s", self.extension_id, request.message)
         return LogResponse()
 
-    @extension_api_method(
-        method_id="utils.currencies.list",
-        namespace="utils",
-        name="List currencies",
-        host_name="utils_currencies_list",
-        sdk_name="currenciesList",
-        description="List currencies supported by LNbits exchange-rate conversion.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_currencies_list(
-        self, request: EmptyRequest
-    ) -> CurrencyListResponse:
-        from lnbits.utils.exchange_rates import allowed_currencies
-
-        return CurrencyListResponse(currencies=allowed_currencies())
-
-    @extension_api_method(
-        method_id="utils.currencies.rate",
-        namespace="utils",
-        name="Get currency rate",
-        host_name="utils_currencies_rate",
-        sdk_name="currenciesRate",
-        description="Get sats-per-fiat and BTC price for a currency.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_currencies_rate(
-        self, request: CurrencyRateRequest
-    ) -> CurrencyRateResponse:
-        from lnbits.utils.exchange_rates import get_fiat_rate_and_price_satoshis
-
-        rate, price = await get_fiat_rate_and_price_satoshis(request.currency)
-        return CurrencyRateResponse(rate=rate, price=price)
-
-    @extension_api_method(
-        method_id="utils.currencies.convert",
-        namespace="utils",
-        name="Convert currency amount",
-        host_name="utils_currencies_convert",
-        sdk_name="currenciesConvert",
-        description="Convert between sats, BTC, and supported fiat currencies.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_currencies_convert(
-        self, request: CurrencyConvertRequest
-    ) -> CurrencyConvertResponse:
-        from lnbits.utils.exchange_rates import (
-            fiat_amount_as_satoshis,
-            satoshis_amount_as_fiat,
-        )
-
-        from_currency = request.from_currency
-        if from_currency == "sats":
-            from_currency = "sat"
-
-        amounts: list[tuple[str, float]] = []
-        if from_currency == "sat":
-            sats = int(request.amount)
-            amounts.append(("BTC", sats / 100_000_000))
-            amounts.append(("sats", sats))
-            for currency in request.to.split(","):
-                currency = currency.strip()
-                if currency:
-                    amounts.append(
-                        (
-                            currency.upper(),
-                            await satoshis_amount_as_fiat(sats, currency),
-                        )
-                    )
-        else:
-            sats = await fiat_amount_as_satoshis(request.amount, from_currency)
-            amounts.append((from_currency.upper(), request.amount))
-            amounts.append(("sats", sats))
-            amounts.append(("BTC", sats / 100_000_000))
-        return CurrencyConvertResponse(amounts=amounts)
-
-    @extension_api_method(
-        method_id="utils.currencies.fiat_to_sats",
-        namespace="utils",
-        name="Convert fiat to sats",
-        host_name="utils_currencies_fiat_to_sats",
-        sdk_name="currenciesFiatToSats",
-        description="Convert a fiat amount to sats.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_currencies_fiat_to_sats(
-        self, request: FiatToSatsRequest
-    ) -> FiatToSatsResponse:
-        from lnbits.utils.exchange_rates import fiat_amount_as_satoshis
-
-        return FiatToSatsResponse(
-            amount_sat=await fiat_amount_as_satoshis(
-                request.amount,
-                request.currency,
-            )
-        )
-
-    @extension_api_method(
-        method_id="utils.currencies.sats_to_fiat",
-        namespace="utils",
-        name="Convert sats to fiat",
-        host_name="utils_currencies_sats_to_fiat",
-        sdk_name="currenciesSatsToFiat",
-        description="Convert a sats amount to fiat.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_currencies_sats_to_fiat(
-        self, request: SatsToFiatRequest
-    ) -> SatsToFiatResponse:
-        from lnbits.utils.exchange_rates import satoshis_amount_as_fiat
-
-        return SatsToFiatResponse(
-            amount=await satoshis_amount_as_fiat(request.amount, request.currency)
-        )
-
-    @extension_api_method(
-        method_id="utils.server.health",
-        namespace="utils",
-        name="Server health",
-        host_name="utils_server_health",
-        sdk_name="serverHealth",
-        description="Return basic public LNbits server health data.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_server_health(self, request: EmptyRequest) -> ServerHealthResponse:
-        from lnbits.settings import settings
-
-        return ServerHealthResponse(
-            server_time=int(time.time()),
-            up_time=settings.lnbits_server_up_time,
-        )
-
-    @extension_api_method(
-        method_id="utils.lightning.decode_invoice",
-        namespace="utils",
-        name="Decode Lightning invoice",
-        host_name="utils_lightning_decode_invoice",
-        sdk_name="lightningDecodeInvoice",
-        description="Decode a BOLT11 Lightning invoice.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_lightning_decode_invoice(
-        self, request: Bolt11Request
-    ) -> DecodeInvoiceResponse:
-        invoice = _decode_bolt11(request.bolt11)
-        return _decoded_invoice_response(invoice)
-
-    @extension_api_method(
-        method_id="utils.lightning.validate_invoice",
-        namespace="utils",
-        name="Validate Lightning invoice",
-        host_name="utils_lightning_validate_invoice",
-        sdk_name="lightningValidateInvoice",
-        description="Validate whether a string is a BOLT11 Lightning invoice.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_lightning_validate_invoice(
-        self, request: Bolt11Request
-    ) -> ValidateInvoiceResponse:
-        try:
-            _decode_bolt11(request.bolt11)
-            return ValidateInvoiceResponse(valid=True)
-        except Exception as exc:
-            return ValidateInvoiceResponse(valid=False, error=str(exc))
-
-    @extension_api_method(
-        method_id="utils.lightning.invoice_payment_hash",
-        namespace="utils",
-        name="Get Lightning invoice payment hash",
-        host_name="utils_lightning_invoice_payment_hash",
-        sdk_name="lightningInvoicePaymentHash",
-        description="Get the payment hash from a BOLT11 Lightning invoice.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_lightning_invoice_payment_hash(
-        self, request: Bolt11Request
-    ) -> InvoicePaymentHashResponse:
-        return InvoicePaymentHashResponse(
-            payment_hash=str(_decode_bolt11(request.bolt11).payment_hash)
-        )
-
-    @extension_api_method(
-        method_id="utils.lightning.invoice_amount_msat",
-        namespace="utils",
-        name="Get Lightning invoice amount",
-        host_name="utils_lightning_invoice_amount_msat",
-        sdk_name="lightningInvoiceAmountMsat",
-        description="Get the amount in msat from a BOLT11 Lightning invoice.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_lightning_invoice_amount_msat(
-        self, request: Bolt11Request
-    ) -> InvoiceAmountMsatResponse:
-        return InvoiceAmountMsatResponse(
-            amount_msat=_invoice_amount_msat(_decode_bolt11(request.bolt11))
-        )
-
-    @extension_api_method(
-        method_id="utils.lightning.invoice_expiry",
-        namespace="utils",
-        name="Get Lightning invoice expiry",
-        host_name="utils_lightning_invoice_expiry",
-        sdk_name="lightningInvoiceExpiry",
-        description="Get the expiry timestamp from a BOLT11 Lightning invoice.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_lightning_invoice_expiry(
-        self, request: Bolt11Request
-    ) -> InvoiceExpiryResponse:
-        return InvoiceExpiryResponse(
-            expires_at=_invoice_expires_at(_decode_bolt11(request.bolt11))
-        )
-
-    @extension_api_method(
-        method_id="utils.lightning.invoice_memo",
-        namespace="utils",
-        name="Get Lightning invoice memo",
-        host_name="utils_lightning_invoice_memo",
-        sdk_name="lightningInvoiceMemo",
-        description="Get the memo from a BOLT11 Lightning invoice.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_lightning_invoice_memo(
-        self, request: Bolt11Request
-    ) -> InvoiceMemoResponse:
-        return InvoiceMemoResponse(memo=_invoice_memo(_decode_bolt11(request.bolt11)))
-
-    @extension_api_method(
-        method_id="utils.lightning.verify_preimage",
-        namespace="utils",
-        name="Verify Lightning preimage",
-        host_name="utils_lightning_verify_preimage",
-        sdk_name="lightningVerifyPreimage",
-        description="Verify that a preimage matches a payment hash.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_lightning_verify_preimage(
-        self, request: VerifyPreimageRequest
-    ) -> VerifyPreimageResponse:
-        from lnbits.utils.crypto import verify_preimage
-
-        return VerifyPreimageResponse(
-            valid=verify_preimage(request.preimage, request.payment_hash)
-        )
-
-    @extension_api_method(
-        method_id="utils.lightning.random_secret_and_hash",
-        namespace="utils",
-        name="Random Lightning secret and hash",
-        host_name="utils_lightning_random_secret_and_hash",
-        sdk_name="lightningRandomSecretAndHash",
-        description="Create a random secret and matching SHA256 hash.",
-        required_permission="utils.basic",
-        require_auth=False,
-    )
-    async def utils_lightning_random_secret_and_hash(
-        self, request: RandomSecretAndHashRequest
-    ) -> RandomSecretAndHashResponse:
-        from lnbits.utils.crypto import random_secret_and_hash
-
-        secret, payment_hash = random_secret_and_hash(request.length)
-        return RandomSecretAndHashResponse(secret=secret, hash=payment_hash)
-
     @staticmethod
     def _permission_data(
         permissions: Iterable[Any],
@@ -846,85 +557,49 @@ class ExtensionAPI:
         return table, wallet_field
 
 
-def _decode_bolt11(payment_request: str) -> Any:
-    from lnbits import bolt11
-
-    return bolt11.decode(payment_request)
-
-
-def _decoded_invoice_response(invoice: Any) -> DecodeInvoiceResponse:
-    return DecodeInvoiceResponse(
-        payment_hash=str(getattr(invoice, "payment_hash", "")) or None,
-        amount_msat=_invoice_amount_msat(invoice),
-        expiry=_invoice_expiry(invoice),
-        expires_at=_invoice_expires_at(invoice),
-        memo=_invoice_memo(invoice),
-    )
-
-
-def _invoice_amount_msat(invoice: Any) -> int | None:
-    amount_msat = getattr(invoice, "amount_msat", None)
-    if amount_msat is None:
-        return None
-    return int(amount_msat)
-
-
-def _invoice_expiry(invoice: Any) -> int | None:
-    expiry = getattr(invoice, "expiry", None)
-    if expiry is None:
-        return None
-    return int(expiry)
-
-
-def _invoice_expires_at(invoice: Any) -> int | None:
-    expiry_date = getattr(invoice, "expiry_date", None)
-    if isinstance(expiry_date, datetime):
-        return int(expiry_date.timestamp())
-
-    date = getattr(invoice, "date", None)
-    expiry = getattr(invoice, "expiry", None)
-    if isinstance(date, datetime) and expiry is not None:
-        return int(date.timestamp() + int(expiry))
-    if isinstance(date, (int, float)) and expiry is not None:
-        return int(date + int(expiry))
-    return None
-
-
-def _invoice_memo(invoice: Any) -> str | None:
-    memo = getattr(invoice, "description", None)
-    return str(memo) if memo is not None else None
-
-
 def list_extension_api_methods(
     api_cls: type[ExtensionAPI] = ExtensionAPI,
 ) -> list[ExtensionAPIMethod]:
     methods: list[ExtensionAPIMethod] = []
 
-    for python_name, function in inspect.getmembers(api_cls, inspect.isfunction):
-        export = getattr(function, _EXTENSION_API_METHOD_ATTR, None)
-        if not export:
-            continue
+    for prefix, method_cls in _extension_api_method_sources(api_cls):
+        for python_name, function in inspect.getmembers(method_cls, inspect.isfunction):
+            export = getattr(function, _EXTENSION_API_METHOD_ATTR, None)
+            if not export:
+                continue
 
-        request_model, response_model = _get_method_models(function)
-        methods.append(
-            ExtensionAPIMethod(
-                method_id=export.method_id,
-                namespace=export.namespace,
-                name=export.name,
-                python_name=python_name,
-                host_name=export.host_name,
-                sdk_name=export.sdk_name,
-                description=export.description,
-                request_model=request_model,
-                response_model=response_model,
-                required_permission=export.required_permission,
-                require_auth=export.require_auth,
+            request_model, response_model = _get_method_models(function)
+            methods.append(
+                ExtensionAPIMethod(
+                    method_id=export.method_id,
+                    namespace=export.namespace,
+                    name=export.name,
+                    python_name=f"{prefix}.{python_name}" if prefix else python_name,
+                    host_interface=export.host_interface,
+                    host_name=export.host_name,
+                    sdk_name=export.sdk_name,
+                    description=export.description,
+                    request_model=request_model,
+                    response_model=response_model,
+                    required_permission=export.required_permission,
+                    require_auth=export.require_auth,
+                )
             )
-        )
 
     return sorted(methods, key=lambda method: method.method_id)
 
 
+def _extension_api_method_sources(
+    api_cls: type[ExtensionAPI],
+) -> list[tuple[str, type[Any]]]:
+    sources: list[tuple[str, type[Any]]] = [("", api_cls)]
+    if issubclass(api_cls, ExtensionAPI):
+        from .api_utils import extension_api_utils_method_classes
+
+        sources.extend(extension_api_utils_method_classes().items())
+    return sources
+
+
 def extension_api_permission_ids(
     api_cls: type[ExtensionAPI] = ExtensionAPI,
 ) -> set[str]:
@@ -956,6 +631,7 @@ def extension_api_contract(
                 "namespace": method.namespace,
                 "name": method.name,
                 "python_name": method.python_name,
+                "host_interface": method.host_interface,
                 "host_name": method.host_name,
                 "sdk_name": method.sdk_name,
                 "sdk_qualified_name": method.sdk_qualified_name,

lnbits/core/extensions/api_utils.py

@@ -0,0 +1,381 @@
+from __future__ import annotations
+
+import time
+from datetime import datetime
+from typing import TYPE_CHECKING, Any
+
+from .api import extension_api_method
+from .models import (
+    Bolt11Request,
+    CurrencyConvertRequest,
+    CurrencyConvertResponse,
+    CurrencyListResponse,
+    CurrencyRateRequest,
+    CurrencyRateResponse,
+    DecodeInvoiceResponse,
+    EmptyRequest,
+    FiatToSatsRequest,
+    FiatToSatsResponse,
+    InvoiceAmountMsatResponse,
+    InvoiceExpiryResponse,
+    InvoiceMemoResponse,
+    InvoicePaymentHashResponse,
+    RandomSecretAndHashRequest,
+    RandomSecretAndHashResponse,
+    SatsToFiatRequest,
+    SatsToFiatResponse,
+    ServerHealthResponse,
+    ValidateInvoiceResponse,
+    VerifyPreimageRequest,
+    VerifyPreimageResponse,
+)
+
+if TYPE_CHECKING:
+    from .api import ExtensionAPI
+
+
+class ExtensionAPIUtils:
+    def __init__(self, api: ExtensionAPI) -> None:
+        self.api = api
+        self.currencies = ExtensionCurrencyUtils(api)
+        self.server = ExtensionServerUtils(api)
+        self.lightning = ExtensionLightningUtils(api)
+
+
+class _ExtensionAPIUtilsGroup:
+    def __init__(self, api: ExtensionAPI) -> None:
+        self.api = api
+
+
+class ExtensionCurrencyUtils(_ExtensionAPIUtilsGroup):
+    @extension_api_method(
+        method_id="utils.currencies.list",
+        namespace="utils.currencies",
+        name="List currencies",
+        host_interface="utils-currencies",
+        host_name="list_currencies",
+        sdk_name="list",
+        description="List currencies supported by LNbits exchange-rate conversion.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def list(self, request: EmptyRequest) -> CurrencyListResponse:
+        from lnbits.utils.exchange_rates import allowed_currencies
+
+        return CurrencyListResponse(currencies=allowed_currencies())
+
+    @extension_api_method(
+        method_id="utils.currencies.rate",
+        namespace="utils.currencies",
+        name="Get currency rate",
+        host_interface="utils-currencies",
+        host_name="rate",
+        sdk_name="rate",
+        description="Get sats-per-fiat and BTC price for a currency.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def rate(self, request: CurrencyRateRequest) -> CurrencyRateResponse:
+        from lnbits.utils.exchange_rates import get_fiat_rate_and_price_satoshis
+
+        rate, price = await get_fiat_rate_and_price_satoshis(request.currency)
+        return CurrencyRateResponse(rate=rate, price=price)
+
+    @extension_api_method(
+        method_id="utils.currencies.convert",
+        namespace="utils.currencies",
+        name="Convert currency amount",
+        host_interface="utils-currencies",
+        host_name="convert",
+        sdk_name="convert",
+        description="Convert between sats, BTC, and supported fiat currencies.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def convert(self, request: CurrencyConvertRequest) -> CurrencyConvertResponse:
+        from lnbits.utils.exchange_rates import (
+            fiat_amount_as_satoshis,
+            satoshis_amount_as_fiat,
+        )
+
+        from_currency = request.from_currency
+        if from_currency == "sats":
+            from_currency = "sat"
+
+        amounts: list[tuple[str, float]] = []
+        if from_currency == "sat":
+            sats = int(request.amount)
+            amounts.append(("BTC", sats / 100_000_000))
+            amounts.append(("sats", sats))
+            for currency in request.to.split(","):
+                currency = currency.strip()
+                if currency:
+                    amounts.append(
+                        (
+                            currency.upper(),
+                            await satoshis_amount_as_fiat(sats, currency),
+                        )
+                    )
+        else:
+            sats = await fiat_amount_as_satoshis(request.amount, from_currency)
+            amounts.append((from_currency.upper(), request.amount))
+            amounts.append(("sats", sats))
+            amounts.append(("BTC", sats / 100_000_000))
+        return CurrencyConvertResponse(amounts=amounts)
+
+    @extension_api_method(
+        method_id="utils.currencies.fiat_to_sats",
+        namespace="utils.currencies",
+        name="Convert fiat to sats",
+        host_interface="utils-currencies",
+        host_name="fiat_to_sats",
+        sdk_name="fiatToSats",
+        description="Convert a fiat amount to sats.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def fiat_to_sats(self, request: FiatToSatsRequest) -> FiatToSatsResponse:
+        from lnbits.utils.exchange_rates import fiat_amount_as_satoshis
+
+        return FiatToSatsResponse(
+            amount_sat=await fiat_amount_as_satoshis(
+                request.amount,
+                request.currency,
+            )
+        )
+
+    @extension_api_method(
+        method_id="utils.currencies.sats_to_fiat",
+        namespace="utils.currencies",
+        name="Convert sats to fiat",
+        host_interface="utils-currencies",
+        host_name="sats_to_fiat",
+        sdk_name="satsToFiat",
+        description="Convert a sats amount to fiat.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def sats_to_fiat(self, request: SatsToFiatRequest) -> SatsToFiatResponse:
+        from lnbits.utils.exchange_rates import satoshis_amount_as_fiat
+
+        return SatsToFiatResponse(
+            amount=await satoshis_amount_as_fiat(request.amount, request.currency)
+        )
+
+
+class ExtensionServerUtils(_ExtensionAPIUtilsGroup):
+    @extension_api_method(
+        method_id="utils.server.health",
+        namespace="utils.server",
+        name="Server health",
+        host_interface="utils-server",
+        host_name="health",
+        sdk_name="health",
+        description="Return basic public LNbits server health data.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def health(self, request: EmptyRequest) -> ServerHealthResponse:
+        from lnbits.settings import settings
+
+        return ServerHealthResponse(
+            server_time=int(time.time()),
+            up_time=settings.lnbits_server_up_time,
+        )
+
+
+class ExtensionLightningUtils(_ExtensionAPIUtilsGroup):
+    @extension_api_method(
+        method_id="utils.lightning.decode_invoice",
+        namespace="utils.lightning",
+        name="Decode Lightning invoice",
+        host_interface="utils-lightning",
+        host_name="decode_invoice",
+        sdk_name="decodeInvoice",
+        description="Decode a BOLT11 Lightning invoice.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def decode_invoice(self, request: Bolt11Request) -> DecodeInvoiceResponse:
+        invoice = _decode_bolt11(request.bolt11)
+        return _decoded_invoice_response(invoice)
+
+    @extension_api_method(
+        method_id="utils.lightning.validate_invoice",
+        namespace="utils.lightning",
+        name="Validate Lightning invoice",
+        host_interface="utils-lightning",
+        host_name="validate_invoice",
+        sdk_name="validateInvoice",
+        description="Validate whether a string is a BOLT11 Lightning invoice.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def validate_invoice(self, request: Bolt11Request) -> ValidateInvoiceResponse:
+        try:
+            _decode_bolt11(request.bolt11)
+            return ValidateInvoiceResponse(valid=True)
+        except Exception as exc:
+            return ValidateInvoiceResponse(valid=False, error=str(exc))
+
+    @extension_api_method(
+        method_id="utils.lightning.invoice_payment_hash",
+        namespace="utils.lightning",
+        name="Get Lightning invoice payment hash",
+        host_interface="utils-lightning",
+        host_name="invoice_payment_hash",
+        sdk_name="invoicePaymentHash",
+        description="Get the payment hash from a BOLT11 Lightning invoice.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def invoice_payment_hash(
+        self, request: Bolt11Request
+    ) -> InvoicePaymentHashResponse:
+        return InvoicePaymentHashResponse(
+            payment_hash=str(_decode_bolt11(request.bolt11).payment_hash)
+        )
+
+    @extension_api_method(
+        method_id="utils.lightning.invoice_amount_msat",
+        namespace="utils.lightning",
+        name="Get Lightning invoice amount",
+        host_interface="utils-lightning",
+        host_name="invoice_amount_msat",
+        sdk_name="invoiceAmountMsat",
+        description="Get the amount in msat from a BOLT11 Lightning invoice.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def invoice_amount_msat(
+        self, request: Bolt11Request
+    ) -> InvoiceAmountMsatResponse:
+        return InvoiceAmountMsatResponse(
+            amount_msat=_invoice_amount_msat(_decode_bolt11(request.bolt11))
+        )
+
+    @extension_api_method(
+        method_id="utils.lightning.invoice_expiry",
+        namespace="utils.lightning",
+        name="Get Lightning invoice expiry",
+        host_interface="utils-lightning",
+        host_name="invoice_expiry",
+        sdk_name="invoiceExpiry",
+        description="Get the expiry timestamp from a BOLT11 Lightning invoice.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def invoice_expiry(self, request: Bolt11Request) -> InvoiceExpiryResponse:
+        return InvoiceExpiryResponse(
+            expires_at=_invoice_expires_at(_decode_bolt11(request.bolt11))
+        )
+
+    @extension_api_method(
+        method_id="utils.lightning.invoice_memo",
+        namespace="utils.lightning",
+        name="Get Lightning invoice memo",
+        host_interface="utils-lightning",
+        host_name="invoice_memo",
+        sdk_name="invoiceMemo",
+        description="Get the memo from a BOLT11 Lightning invoice.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def invoice_memo(self, request: Bolt11Request) -> InvoiceMemoResponse:
+        return InvoiceMemoResponse(memo=_invoice_memo(_decode_bolt11(request.bolt11)))
+
+    @extension_api_method(
+        method_id="utils.lightning.verify_preimage",
+        namespace="utils.lightning",
+        name="Verify Lightning preimage",
+        host_interface="utils-lightning",
+        host_name="verify_preimage",
+        sdk_name="verifyPreimage",
+        description="Verify that a preimage matches a payment hash.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def verify_preimage(
+        self, request: VerifyPreimageRequest
+    ) -> VerifyPreimageResponse:
+        from lnbits.utils.crypto import verify_preimage
+
+        return VerifyPreimageResponse(
+            valid=verify_preimage(request.preimage, request.payment_hash)
+        )
+
+    @extension_api_method(
+        method_id="utils.lightning.random_secret_and_hash",
+        namespace="utils.lightning",
+        name="Random Lightning secret and hash",
+        host_interface="utils-lightning",
+        host_name="random_secret_and_hash",
+        sdk_name="randomSecretAndHash",
+        description="Create a random secret and matching SHA256 hash.",
+        required_permission="utils.basic",
+        require_auth=False,
+    )
+    async def random_secret_and_hash(
+        self, request: RandomSecretAndHashRequest
+    ) -> RandomSecretAndHashResponse:
+        from lnbits.utils.crypto import random_secret_and_hash
+
+        secret, payment_hash = random_secret_and_hash(request.length)
+        return RandomSecretAndHashResponse(secret=secret, hash=payment_hash)
+
+
+def extension_api_utils_method_classes() -> dict[str, type[_ExtensionAPIUtilsGroup]]:
+    return {
+        "utils.currencies": ExtensionCurrencyUtils,
+        "utils.server": ExtensionServerUtils,
+        "utils.lightning": ExtensionLightningUtils,
+    }
+
+
+def _decode_bolt11(payment_request: str) -> Any:
+    from lnbits import bolt11
+
+    return bolt11.decode(payment_request)
+
+
+def _decoded_invoice_response(invoice: Any) -> DecodeInvoiceResponse:
+    return DecodeInvoiceResponse(
+        payment_hash=str(getattr(invoice, "payment_hash", "")) or None,
+        amount_msat=_invoice_amount_msat(invoice),
+        expiry=_invoice_expiry(invoice),
+        expires_at=_invoice_expires_at(invoice),
+        memo=_invoice_memo(invoice),
+    )
+
+
+def _invoice_amount_msat(invoice: Any) -> int | None:
+    amount_msat = getattr(invoice, "amount_msat", None)
+    if amount_msat is None:
+        return None
+    return int(amount_msat)
+
+
+def _invoice_expiry(invoice: Any) -> int | None:
+    expiry = getattr(invoice, "expiry", None)
+    if expiry is None:
+        return None
+    return int(expiry)
+
+
+def _invoice_expires_at(invoice: Any) -> int | None:
+    expiry_date = getattr(invoice, "expiry_date", None)
+    if isinstance(expiry_date, datetime):
+        return int(expiry_date.timestamp())
+
+    date = getattr(invoice, "date", None)
+    expiry = getattr(invoice, "expiry", None)
+    if isinstance(date, datetime) and expiry is not None:
+        return int(date.timestamp() + int(expiry))
+    if isinstance(date, (int, float)) and expiry is not None:
+        return int(date + int(expiry))
+    return None
+
+
+def _invoice_memo(invoice: Any) -> str | None:
+    memo = getattr(invoice, "description", None)
+    return str(memo) if memo is not None else None

lnbits/core/extensions/runtime.py

@@ -30,26 +30,34 @@ class ExtensionAPIHost:
     ) -> dict[str, Any]:
         method = self._require_method(host_name)
         request = self._request_model(method, payload)
-        handler = getattr(self.api, method.python_name)
+        handler = _resolve_attr_path(self.api, method.python_name)
         response = handler(request)
         if inspect.isawaitable(response):
             response = await response
         return self._response_payload(method, response)
 
     def imports(self) -> dict[str, HostImport]:
+        return self.imports_for_interface("host")
+
+    def import_object(self) -> dict[str, dict[str, HostImport]]:
+        interfaces = sorted({method.host_interface for method in self.methods})
+        return {
+            f"lnbits:extension/{interface}": self.imports_for_interface(interface)
+            for interface in interfaces
+        }
+
+    def imports_for_interface(self, host_interface: str) -> dict[str, HostImport]:
         return {
             _snake_to_camel(method.host_name): self._make_import(method)
             for method in self.methods
+            if method.host_interface == host_interface
         }
 
-    def import_object(self) -> dict[str, dict[str, HostImport]]:
-        return {"lnbits:extension/host": self.imports()}
-
     def _make_import(self, method: ExtensionAPIMethod) -> HostImport:
         async def host_import(
             payload: Mapping[str, Any] | BaseModel | None = None,
         ) -> dict[str, Any]:
-            return await self.invoke(method.host_name, payload)
+            return await self.invoke(method.method_id, payload)
 
         return host_import
 
@@ -66,6 +74,8 @@ class ExtensionAPIHost:
         index: dict[str, ExtensionAPIMethod] = {}
         for method in methods:
             for host_name in {
+                method.method_id,
+                f"{method.host_interface}:{method.host_name}",
                 method.host_name,
                 _snake_to_camel(method.host_name),
                 method.host_name.replace("_", "-"),
@@ -118,3 +128,9 @@ def _snake_to_camel(value: str) -> str:
 def _to_snake(value: str) -> str:
     value = value.replace("-", "_")
     return re.sub(r"([a-z0-9])([A-Z])", r"\1_\2", value).lower()
+
+
+def _resolve_attr_path(value: Any, path: str) -> Any:
+    for part in path.split("."):
+        value = getattr(value, part)
+    return value

lnbits/core/extensions/wasm.py

@@ -128,12 +128,17 @@ def _add_extension_host_imports(
     event_loop: asyncio.AbstractEventLoop,
 ) -> None:
     with linker.root() as root:
-        with root.add_instance("lnbits:extension/host") as host:
-            for method in list_extension_api_methods():
-                host.add_func(
-                    method.host_name.replace("_", "-"),
-                    _make_host_import(api_host, method.host_name, event_loop),
-                )
+        methods_by_interface: dict[str, list[Any]] = {}
+        for method in list_extension_api_methods():
+            methods_by_interface.setdefault(method.host_interface, []).append(method)
+
+        for host_interface, methods in methods_by_interface.items():
+            with root.add_instance(f"lnbits:extension/{host_interface}") as host:
+                for method in methods:
+                    host.add_func(
+                        method.host_name.replace("_", "-"),
+                        _make_host_import(api_host, method.method_id, event_loop),
+                    )
 
 
 def _make_host_import(

tools/codegen/extension_sdk_typescript.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import argparse
+import re
 from collections import defaultdict
 from collections.abc import Sequence
 from pathlib import Path
@@ -185,6 +186,7 @@ def _render_method_metadata(
                 f'    namespace: "{method.namespace}",',
                 f'    sdkName: "{method.sdk_name}",',
                 f'    pythonName: "{method.python_name}",',
+                f'    hostInterface: "{method.host_interface}",',
                 f'    hostName: "{method.host_name}",',
                 f'    hostJsName: "{_camel(method.host_name)}",',
                 f"    requiredPermission: {permission},",
@@ -197,76 +199,120 @@ def _render_method_metadata(
 
 def _render_host_type(methods: Sequence[ExtensionAPIMethod]) -> list[str]:
     lines = ["export type ExtensionHost = {"]
-    for method in sorted(methods, key=lambda item: item.host_name):
-        request = _model_name(method.request_model)
-        response = _model_name(method.response_model)
-        if _is_empty_model(method.request_model):
-            lines.append(f"  {_camel(method.host_name)}(): MaybePromise<{response}>")
-        else:
-            lines.append(
-                f"  {_camel(method.host_name)}"
-                f"(input: {request}): MaybePromise<{response}>"
-            )
-    lines.append("}")
-    return lines
-
-
-def _render_sdk_type(methods: Sequence[ExtensionAPIMethod]) -> list[str]:
-    namespaces = _methods_by_namespace(methods)
-    lines = ["export type ExtensionSdk = {"]
-    for namespace, namespace_methods in namespaces.items():
-        lines.append(f"  {namespace}: {{")
-        for method in namespace_methods:
+    for host_interface, interface_methods in _methods_by_host_interface(
+        methods
+    ).items():
+        lines.append(f"  {_ts_property(host_interface)}: {{")
+        for method in sorted(interface_methods, key=lambda item: item.host_name):
             request = _model_name(method.request_model)
             response = _model_name(method.response_model)
             if _is_empty_model(method.request_model):
-                lines.append(f"    {method.sdk_name}(): Promise<{response}>")
+                lines.append(
+                    f"    {_camel(method.host_name)}(): MaybePromise<{response}>"
+                )
             else:
                 lines.append(
-                    f"    {method.sdk_name}(input: {request}): Promise<{response}>"
+                    f"    {_camel(method.host_name)}"
+                    f"(input: {request}): MaybePromise<{response}>"
                 )
         lines.append("  }")
     lines.append("}")
     return lines
 
 
+def _render_sdk_type(methods: Sequence[ExtensionAPIMethod]) -> list[str]:
+    lines = ["export type ExtensionSdk = {"]
+    _render_sdk_type_node(lines, _namespace_tree(methods), 1)
+    lines.append("}")
+    return lines
+
+
 def _render_create_sdk(methods: Sequence[ExtensionAPIMethod]) -> list[str]:
-    namespaces = _methods_by_namespace(methods)
     lines = [
         "export function createExtensionSdk(",
         "  host: ExtensionHost",
         "): ExtensionSdk {",
         "  return {",
     ]
-    for namespace, namespace_methods in namespaces.items():
-        lines.append(f"    {namespace}: {{")
-        for method in namespace_methods:
-            host_name = _camel(method.host_name)
-            if _is_empty_model(method.request_model):
-                signature = f"{method.sdk_name}()"
-                host_call = f"host.{host_name}()"
-            else:
-                signature = f"{method.sdk_name}(input)"
-                host_call = f"host.{host_name}(input)"
-            lines.extend(
-                [
-                    f"      async {signature} {{",
-                    f"        return {host_call}",
-                    "      },",
-                ]
-            )
-        lines.append("    },")
+    _render_create_sdk_node(lines, _namespace_tree(methods), 2)
     lines.extend(["  }", "}"])
     return lines
 
 
-def _methods_by_namespace(
+def _render_sdk_type_node(lines: list[str], node: dict[str, Any], level: int) -> None:
+    indent = "  " * level
+    for namespace, child in _iter_child_namespaces(node):
+        lines.append(f"{indent}{namespace}: {{")
+        _render_sdk_type_node(lines, child, level + 1)
+        lines.append(f"{indent}}}")
+
+    for method in node.get("__methods__", []):
+        request = _model_name(method.request_model)
+        response = _model_name(method.response_model)
+        if _is_empty_model(method.request_model):
+            lines.append(f"{indent}{method.sdk_name}(): Promise<{response}>")
+        else:
+            lines.append(
+                f"{indent}{method.sdk_name}(input: {request}): Promise<{response}>"
+            )
+
+
+def _render_create_sdk_node(lines: list[str], node: dict[str, Any], level: int) -> None:
+    indent = "  " * level
+    for namespace, child in _iter_child_namespaces(node):
+        lines.append(f"{indent}{namespace}: {{")
+        _render_create_sdk_node(lines, child, level + 1)
+        lines.append(f"{indent}}},")
+
+    for method in node.get("__methods__", []):
+        host_call_target = (
+            f"host{_ts_access(method.host_interface)}"
+            f"{_ts_access(_camel(method.host_name))}"
+        )
+        if _is_empty_model(method.request_model):
+            signature = f"{method.sdk_name}()"
+            host_call = f"{host_call_target}()"
+        else:
+            signature = f"{method.sdk_name}(input)"
+            host_call = f"{host_call_target}(input)"
+        lines.extend(
+            [
+                f"{indent}async {signature} {{",
+                f"{indent}  return {host_call}",
+                f"{indent}}},",
+            ]
+        )
+
+
+def _methods_by_host_interface(
     methods: Sequence[ExtensionAPIMethod],
 ) -> dict[str, list[ExtensionAPIMethod]]:
-    namespaces: dict[str, list[ExtensionAPIMethod]] = defaultdict(list)
+    interfaces: dict[str, list[ExtensionAPIMethod]] = defaultdict(list)
+    for method in sorted(
+        methods, key=lambda item: (item.host_interface, item.host_name)
+    ):
+        interfaces[method.host_interface].append(method)
+    return dict(sorted(interfaces.items()))
+
+
+def _namespace_tree(methods: Sequence[ExtensionAPIMethod]) -> dict[str, Any]:
+    tree: dict[str, Any] = {}
     for method in sorted(methods, key=lambda item: (item.namespace, item.sdk_name)):
-        namespaces[method.namespace].append(method)
-    return dict(sorted(namespaces.items()))
+        node = tree
+        for part in method.namespace.split("."):
+            node = node.setdefault(part, {})
+        node.setdefault("__methods__", []).append(method)
+    return tree
+
+
+def _iter_child_namespaces(
+    node: dict[str, Any],
+) -> list[tuple[str, dict[str, Any]]]:
+    return [
+        (key, value)
+        for key, value in sorted(node.items())
+        if key != "__methods__" and isinstance(value, dict)
+    ]
 
 
 def _model_name(model: type[BaseModel]) -> str:
@@ -278,6 +324,18 @@ def _camel(value: str) -> str:
     return head + "".join(part.capitalize() for part in tail)
 
 
+def _ts_property(value: str) -> str:
+    if re.match(r"^[A-Za-z_$][A-Za-z0-9_$]*$", value):
+        return value
+    return f'"{value}"'
+
+
+def _ts_access(value: str) -> str:
+    if re.match(r"^[A-Za-z_$][A-Za-z0-9_$]*$", value):
+        return f".{value}"
+    return f'["{value}"]'
+
+
 def _is_empty_model(model: type[BaseModel]) -> bool:
     return not model.__fields__