payNo
小程序/APP/PC商城
prepay()
refund()
payParam
generateRefundNo()
getRefundNo()
Pay:PayService
generatePayNo()
Pay:PayServiceImpl
pay()
refundSuccess()
FMS
result
ok
afterPayCallback()
afterRefund()
getPayNo()
OMS
onlinePayCallback()
payCallback()
Pay:AbstractPayChannelService
orderPayCallback()
refundNo
beforePrepay()
银联支付通道
pay(payParam)
