优化表结构，重构模型，重新实现基于白银网关的提取节点流程

web/services/bill.go

@@ -1,5 +1,11 @@
 package services
 
+import (
+	m "platform/web/models"
+
+	"github.com/shopspring/decimal"
+)
+
 var Bill = &billService{}
 
 type billService struct{}
@@ -7,3 +13,31 @@ type billService struct{}
 func (s *billService) GenNo() string {
 	return ID.GenReadable("bil")
 }
+
+func newForRecharge(uid int32, billNo string, info string, amount decimal.Decimal, trade *m.Trade) *m.Bill {
+	return &m.Bill{
+		UserID:  uid,
+		BillNo:  billNo,
+		TradeID: &trade.ID,
+		Type:    m.BillTypeRecharge,
+		Info:    &info,
+		Amount:  amount,
+	}
+}
+
+func newForConsume(uid int32, billNo string, info string, amount decimal.Decimal, resource *m.Resource, trade ...*m.Trade) *m.Bill {
+	var bill = &m.Bill{
+		UserID:     uid,
+		BillNo:     billNo,
+		ResourceID: &resource.ID,
+		Type:       m.BillTypeConsume,
+		Info:       &info,
+		Amount:     amount,
+	}
+
+	if len(trade) > 0 {
+		bill.TradeID = &trade[0].ID
+	}
+
+	return bill
+}