修复钱包金额精度结算

backend/internal/modules/wallet/repository.go

@@ -4,6 +4,7 @@ import (
 	"crypto/rand"
 	"encoding/hex"
 	"fmt"
+	"math"
 	"time"
 
 	"hfb_sys/backend/internal/model"
@@ -118,6 +119,7 @@ func (r *Repository) AdminLedger(query AdminLedgerQuery) (*PaginatedResult, erro
 
 func AppendEntries(tx *gorm.DB, entries ...Entry) error {
 	for _, entry := range entries {
+		entry.Amount = roundWalletMoney(entry.Amount)
 		if entry.Amount <= 0 {
 			continue
 		}
@@ -169,25 +171,28 @@ func ensureAccount(tx *gorm.DB, userID uint64) error {
 }
 
 func applyEntry(account *model.WalletAccount, entry Entry) (float64, error) {
+	entry.Amount = roundWalletMoney(entry.Amount)
+	account.AvailableBalance = roundWalletMoney(account.AvailableBalance)
+	account.FrozenBalance = roundWalletMoney(account.FrozenBalance)
 	switch entry.BalanceType {
 	case "available":
 		if entry.Direction == "in" {
-			account.AvailableBalance += entry.Amount
+			account.AvailableBalance = roundWalletMoney(account.AvailableBalance + entry.Amount)
 		} else {
 			if account.AvailableBalance < entry.Amount {
 				return 0, ErrInsufficientBalance
 			}
-			account.AvailableBalance -= entry.Amount
+			account.AvailableBalance = roundWalletMoney(account.AvailableBalance - entry.Amount)
 		}
 		return account.AvailableBalance, nil
 	case "frozen":
 		if entry.Direction == "in" {
-			account.FrozenBalance += entry.Amount
+			account.FrozenBalance = roundWalletMoney(account.FrozenBalance + entry.Amount)
 		} else {
 			if account.FrozenBalance < entry.Amount {
 				return 0, ErrInsufficientBalance
 			}
-			account.FrozenBalance -= entry.Amount
+			account.FrozenBalance = roundWalletMoney(account.FrozenBalance - entry.Amount)
 		}
 		return account.FrozenBalance, nil
 	default:
@@ -195,6 +200,10 @@ func applyEntry(account *model.WalletAccount, entry Entry) (float64, error) {
 	}
 }
 
+func roundWalletMoney(value float64) float64 {
+	return math.Round(value*100) / 100
+}
+
 func toAccountDTO(account model.WalletAccount) *AccountDTO {
 	return &AccountDTO{
 		UserID:           account.UserID,

backend/internal/modules/wallet/repository_test.go

@@ -0,0 +1,31 @@
+package wallet
+
+import (
+	"testing"
+
+	"hfb_sys/backend/internal/model"
+)
+
+func TestApplyEntryRoundsMoneyBeforeComparing(t *testing.T) {
+	account := model.WalletAccount{
+		UserID:        7,
+		FrozenBalance: 606.41,
+	}
+	entry := Entry{
+		UserID:      7,
+		Direction:   "out",
+		Amount:      406.41 + 200.00,
+		BalanceType: "frozen",
+	}
+
+	balanceAfter, err := applyEntry(&account, entry)
+	if err != nil {
+		t.Fatalf("applyEntry() error = %v", err)
+	}
+	if balanceAfter != 0 {
+		t.Fatalf("balanceAfter = %v, want 0", balanceAfter)
+	}
+	if account.FrozenBalance != 0 {
+		t.Fatalf("FrozenBalance = %v, want 0", account.FrozenBalance)
+	}
+}