diff --git a/unipay/init.py b/unipay/init.py
index 6342bc0..39cc7e4 100644
--- a/unipay/init.py
+++ b/unipay/init.py
@@ -1,5 +1,6 @@
 # init.py
 import os
+from appPublic.log import log,exception
 from ahserver.serverenv import ServerEnv
 from .notify import get_provider, get_provider_channel
 from .paylog import PaymentLog
@@ -40,6 +41,10 @@ async def create_payment(request, params_kw=None):
 	if provider not in PROVIDERS:
 		return {"error":"unknown provider"}
 	try:
+		if PROVIDERS[provider] is None:
+			e = Exception(f'{provider} cannot pay')
+			exception(f'{e}')
+			raise e
 		pl = PaymentLog(request._run_ns)
 		channel = get_provider_channel(provider)
 		userid = await get_suer()
@@ -67,6 +72,10 @@ async def query_payment(request, params_kw=None):
 	if provider not in PROVIDERS:
 		return {"error":"unknown provider"}
 	try:
+		if PROVIDERS[provider] is None:
+			e = Exception(f'{provider} cannot pay')
+			exception(f'{e}')
+			raise e
 		res = await PROVIDERS[provider].query(data)
 		return res
 	except Exception as e:
@@ -81,6 +90,10 @@ async def refund_payment(request, params_kw=None):
 	if provider not in PROVIDERS:
 		return {"error":"unknown provider"}
 	try:
+		if PROVIDERS[provider] is None:
+			e = Exception(f'{provider} cannot pay')
+			exception(f'{e}')
+			raise e
 		res = await PROVIDERS[provider].refund(data)
 		return res
 	except Exception as e:
@@ -95,6 +108,10 @@ async def payment_notify(request, callback, params_kw=None):
 	headers = dict(request.headers)
 	body = await request.text()
 	try:
+		if PROVIDERS[provider] is None:
+			e = Exception(f'{provider} cannot pay')
+			exception(f'{e}')
+			raise e
 		data = await PROVIDERS[provider].handle_notify(headers, body)
 		# 这里 data 应包含标准化字段：out_trade_no/status/attach 等
 		# TODO: 业务幂等处理
diff --git a/unipay/notify.py b/unipay/notify.py
index 1bf237d..96ba22c 100644
--- a/unipay/notify.py
+++ b/unipay/notify.py
@@ -17,13 +17,16 @@ def get_provider_channel(name:str):
 	return channels.get(name, '9')
 
 def get_provider(name: str, conf: Dict):
-    if name == "wechat": 
-        return WechatGateway(**conf)
-    if name == "paypal":
-        return PaypalGateway(**conf)
-    if name == "alipay":
-        return AlipayGateway(**conf)
-    if name == "stripe":
-        return StripeGateway(**conf)
-    raise ValueError("unknown provider")
+	try:
+		if name == "wechat": 
+			return WechatGateway(**conf)
+		if name == "paypal":
+			return PaypalGateway(**conf)
+		if name == "alipay":
+			return AlipayGateway(**conf)
+		if name == "stripe":
+			return StripeGateway(**conf)
+	except:
+		return None
+	raise ValueError("unknown provider")