fix(wechat): payload.subject → payment_name fallback, amount ×100 yuan→fen

unipay/providers/wechat.py

@@ -148,11 +148,11 @@ class WechatGateway(Gateway):
 		body = {
 			"appid": self.appid,
 			"mchid": self.mchid,
-			"description": payload["subject"],
+			"description": payload.get("subject") or payload.get("payment_name", "充值"),
 			"out_trade_no": payload["out_trade_no"],
 			"notify_url": payload["notify_url"],
 			"amount": {
-				"total": int(payload["amount"]),
+				"total": int(payload["amount"] * 100),
 				"currency": payload.get("currency", "CNY")
 			},
 			"scene_info": {