fix: 兼容钱包元数据无变化更新

services/wallet-service/internal/storage/mysql/transaction.go

@@ -119,7 +119,10 @@ func (r *Repository) updateTransactionMetadata(ctx context.Context, tx *sql.Tx,
 	if err != nil {
 		return err
 	}
-	if affected != 1 {
+	// go-sql-driver/mysql 默认返回 changed rows，不返回 matched rows。当最终 metadata
+	// 与插入时的预测值完全一致时，这条 UPDATE 合法命中主键但 affected=0；交易行已在
+	// 同一事务中由 insertTransaction 成功插入，因此只能把多行更新视为不变量破坏。
+	if affected > 1 {
 		return xerr.New(xerr.Internal, "wallet transaction metadata update lost its transaction")
 	}
 	return nil

services/wallet-service/internal/storage/mysql/transaction_test.go

@@ -0,0 +1,39 @@
+package mysql
+
+import (
+	"context"
+	"regexp"
+	"testing"
+
+	"github.com/DATA-DOG/go-sqlmock"
+
+	"hyapp/pkg/appcode"
+)
+
+func TestUpdateTransactionMetadataAcceptsMatchedButUnchangedRow(t *testing.T) {
+	db, mock, err := sqlmock.New()
+	if err != nil {
+		t.Fatalf("create sqlmock: %v", err)
+	}
+	defer db.Close()
+
+	mock.ExpectBegin()
+	tx, err := db.Begin()
+	if err != nil {
+		t.Fatalf("begin transaction: %v", err)
+	}
+	mock.ExpectExec(regexp.QuoteMeta(`UPDATE wallet_transactions
+		 SET metadata_json = ?, updated_at_ms = ?
+		 WHERE app_code = ? AND transaction_id = ?`)).
+		WithArgs(`{"balance_version":9}`, int64(1234), "lalu", "tx-1").
+		WillReturnResult(sqlmock.NewResult(0, 0))
+
+	repo := &Repository{}
+	ctx := appcode.WithContext(context.Background(), "lalu")
+	if err := repo.updateTransactionMetadata(ctx, tx, "tx-1", map[string]int64{"balance_version": 9}, 1234); err != nil {
+		t.Fatalf("unchanged matched row must not fail: %v", err)
+	}
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Fatalf("unmet SQL expectations: %v", err)
+	}
+}