feat(discount): change discount type to float64 for improved precision

apis/types.api

@@ -204,8 +204,8 @@ type (
 		CurrencySymbol string `json:"currency_symbol"`
 	}
 	SubscribeDiscount {
-		Quantity int64 `json:"quantity"`
-		Discount int64 `json:"discount"`
+		Quantity int64   `json:"quantity"`
+		Discount float64 `json:"discount"`
 	}
 	Subscribe {
 		Id                int64               `json:"id"`

internal/logic/public/order/getDiscount.go

@@ -3,7 +3,7 @@ package order
 import "github.com/perfect-panel/server/internal/types"
 
 func getDiscount(discounts []types.SubscribeDiscount, inputMonths int64) float64 {
-	var finalDiscount int64 = 100
+	var finalDiscount float64 = 100
 
 	for _, discount := range discounts {
 		if inputMonths >= discount.Quantity && discount.Discount < finalDiscount {
@@ -11,5 +11,5 @@ func getDiscount(discounts []types.SubscribeDiscount, inputMonths int64) float64
 		}
 	}
 
-	return float64(finalDiscount) / float64(100)
+	return finalDiscount / float64(100)
 }

internal/logic/public/portal/tool.go

@@ -7,14 +7,14 @@ import (
 )
 
 func getDiscount(discounts []types.SubscribeDiscount, inputMonths int64) float64 {
-	var finalDiscount int64 = 100
+	var finalDiscount float64 = 100
 
 	for _, discount := range discounts {
 		if inputMonths >= discount.Quantity && discount.Discount < finalDiscount {
 			finalDiscount = discount.Discount
 		}
 	}
-	return float64(finalDiscount) / float64(100)
+	return finalDiscount / float64(100)
 }
 
 func calculateCoupon(amount int64, couponInfo *coupon.Coupon) int64 {

internal/types/types.go

@@ -2117,8 +2117,8 @@ type SubscribeConfig struct {
 }
 
 type SubscribeDiscount struct {
-	Quantity int64 `json:"quantity"`
-	Discount int64 `json:"discount"`
+	Quantity int64   `json:"quantity"`
+	Discount float64 `json:"discount"`
 }
 
 type SubscribeGroup struct {