feat(支付): 添加支付金额转换日志并优化代码结构

为支付宝、Stripe、Epay和CryptoSaaS支付逻辑添加金额转换的日志记录
将支付请求参数提取为变量并添加日志记录
优化代码结构，提高可读性和可维护性

internal/logic/public/portal/purchaseCheckoutLogic.go

@@ -185,13 +185,20 @@ func (l *PurchaseCheckoutLogic) alipayF2fPayment(pay *payment.Payment, info *ord
 		l.Errorw("[PurchaseCheckout] queryExchangeRate error", logger.Field("error", err.Error()))
 		return "", errors.Wrapf(xerr.NewErrCode(xerr.ERROR), "queryExchangeRate error: %s", err.Error())
 	}
-    convertAmount := int64(math.Round(amount * 100)) // Convert to cents for API
+	convertAmount := int64(math.Round(amount * 100))
+	l.Infow("alipay amount",
+		logger.Field("src_cents", info.Amount),
+		logger.Field("decimal", amount),
+		logger.Field("cents", convertAmount),
+	)
 
 	// Create pre-payment trade and generate QR code
-	QRCode, err := client.PreCreateTrade(l.ctx, alipay.Order{
+	o := alipay.Order{
 		OrderNo: info.OrderNo,
 		Amount:  convertAmount,
-	})
+	}
+	l.Infow("alipay request", logger.Field("order", o))
+	QRCode, err := client.PreCreateTrade(l.ctx, o)
 	if err != nil {
 		l.Errorw("[PurchaseCheckout] PreCreateTrade error", logger.Field("error", err.Error()))
 		return "", errors.Wrapf(xerr.NewErrCode(xerr.ERROR), "PreCreateTrade error: %s", err.Error())
@@ -223,19 +230,24 @@ func (l *PurchaseCheckoutLogic) stripePayment(config string, info *order.Order,
 		l.Errorw("[PurchaseCheckout] queryExchangeRate error", logger.Field("error", err.Error()))
 		return nil, errors.Wrapf(xerr.NewErrCode(xerr.ERROR), "queryExchangeRate error: %s", err.Error())
 	}
-    convertAmount := int64(math.Round(amount * 100)) // Convert to cents for Stripe API
+	convertAmount := int64(math.Round(amount * 100))
+	l.Infow("stripe amount",
+		logger.Field("src_cents", info.Amount),
+		logger.Field("decimal", amount),
+		logger.Field("cents", convertAmount),
+	)
 
 	// Create Stripe payment sheet for client-side processing
-	result, err := client.CreatePaymentSheet(&stripe.Order{
+	ord := &stripe.Order{
 		OrderNo:   info.OrderNo,
 		Subscribe: strconv.FormatInt(info.SubscribeId, 10),
 		Amount:    convertAmount,
 		Currency:  "cny",
 		Payment:   stripeConfig.Payment,
-	},
-		&stripe.User{
-			Email: identifier,
-		})
+	}
+	usr := &stripe.User{Email: identifier}
+	l.Infow("stripe request", logger.Field("order", ord), logger.Field("user", usr))
+	result, err := client.CreatePaymentSheet(ord, usr)
 	if err != nil {
 		l.Errorw("[PurchaseCheckout] CreatePaymentSheet error", logger.Field("error", err.Error()))
 		return nil, errors.Wrapf(xerr.NewErrCode(xerr.ERROR), "CreatePaymentSheet error: %s", err.Error())
@@ -276,6 +288,10 @@ func (l *PurchaseCheckoutLogic) epayPayment(config *payment.Payment, info *order
 		return "", err
 	}
 	amount = math.Round(amount*100) / 100
+	l.Infow("epay amount",
+		logger.Field("src_cents", info.Amount),
+		logger.Field("decimal", amount),
+	)
 
 	// Build notification URL for payment status callbacks
 	notifyUrl := ""
@@ -290,14 +306,16 @@ func (l *PurchaseCheckoutLogic) epayPayment(config *payment.Payment, info *order
 	}
 
 	// Create payment URL for user redirection
-	url := client.CreatePayUrl(epay.Order{
+	ord := epay.Order{
 		Name:      l.svcCtx.Config.Site.SiteName,
 		Amount:    amount,
 		OrderNo:   info.OrderNo,
 		SignType:  "MD5",
 		NotifyUrl: notifyUrl,
 		ReturnUrl: returnUrl,
-	})
+	}
+	l.Infow("epay request", logger.Field("order", ord))
+	url := client.CreatePayUrl(ord)
 	return url, nil
 }
 
@@ -319,6 +337,10 @@ func (l *PurchaseCheckoutLogic) CryptoSaaSPayment(config *payment.Payment, info
 		return "", err
 	}
 	amount = math.Round(amount*100) / 100
+	l.Infow("crypto amount",
+		logger.Field("src_cents", info.Amount),
+		logger.Field("decimal", amount),
+	)
 
 	// Build notification URL for payment status callbacks
 	notifyUrl := ""
@@ -333,14 +355,16 @@ func (l *PurchaseCheckoutLogic) CryptoSaaSPayment(config *payment.Payment, info
 	}
 
 	// Create payment URL for user redirection
-	url := client.CreatePayUrl(epay.Order{
+	ord := epay.Order{
 		Name:      l.svcCtx.Config.Site.SiteName,
 		Amount:    amount,
 		OrderNo:   info.OrderNo,
 		SignType:  "MD5",
 		NotifyUrl: notifyUrl,
 		ReturnUrl: returnUrl,
-	})
+	}
+	l.Infow("crypto request", logger.Field("order", ord))
+	url := client.CreatePayUrl(ord)
 	return url, nil
 }
 

scripts/rounding-demo/main.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+    "fmt"
+    "math"
+)
+
+func main() {
+    price := int64(300 * 7)
+    discountPercent := 95.19
+    discount := discountPercent / 100.0
+    amount := int64(math.Round(float64(price) * discount))
+    fmt.Printf("price_cents=%d discount=%.4f amount_cents=%d amount=%.2f\n", price, discount, amount, float64(amount)/100.0)
+
+    couponPercent := 10.0
+    coupon := int64(math.Round(float64(amount) * (couponPercent / 100.0)))
+    amount -= coupon
+    fmt.Printf("coupon_percent=%.2f coupon_cents=%d amount_cents=%d amount=%.2f\n", couponPercent, coupon, amount, float64(amount)/100.0)
+
+    feePercent := 5.0
+    fee := int64(math.Round(float64(amount) * (feePercent / 100.0)))
+    total := amount + fee
+    fmt.Printf("fee_percent=%.2f fee_cents=%d total_cents=%d total=%.2f\n", feePercent, fee, total, float64(total)/100.0)
+}
+