title Pay   

AppClient->+AppService: create Order
AppService-> +PayService: orderID、productID、等
PayService-> -AppService: payId
AppService-> -AppClient :payId
AppClient -> +PayClient: payId


PayClient->AccountSDK:password
opt password
   PayClient -> +AccountSDK:productId、prodyctNo
   AccountSDK -> -PayClient:password
end

PayClient->RiskSDK:risk
opt risk
PayClient->+RiskSDK:riskData
RiskSDK-> -PayClient: result
end
PayClient->PayClient: MSM
PayClient ->+PayService:payId
PayService -> -PayClient:payResult

PayClient-> -AppClient:SDKPayResult