修复拉卡拉支付时间偏差

backend/internal/integrations/payment/lakala/client.go

@@ -19,6 +19,8 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	"hfb_sys/backend/internal/timeutil"
 )
 
 var (
@@ -174,11 +176,12 @@ func (c *Client) CreatePayment(ctx context.Context, req CreatePaymentRequest) (*
 	if expireMinutes <= 0 {
 		expireMinutes = 15
 	}
+	now := timeutil.ShanghaiNow()
 	reqData := map[string]any{
 		"out_order_no":         req.ThirdOrderID,
 		"merchant_no":          c.cfg.MerchantID,
 		"total_amount":         req.AmountCent,
-		"order_efficient_time": time.Now().Add(time.Duration(expireMinutes) * time.Minute).Format("20060102150405"),
+		"order_efficient_time": now.Add(time.Duration(expireMinutes) * time.Minute).Format("20060102150405"),
 		"notify_url":           firstNonEmpty(req.NotifyURL, c.cfg.NotifyURL),
 		"support_refund":       1,
 		"support_repeat_pay":   1,
@@ -364,7 +367,7 @@ func ParsePayload(body []byte) (map[string]string, error) {
 
 func (c *Client) post(ctx context.Context, endpoint string, reqData map[string]any) (map[string]string, error) {
 	body, err := json.Marshal(map[string]any{
-		"req_time": time.Now().Format("20060102150405"),
+		"req_time": timeutil.ShanghaiNow().Format("20060102150405"),
 		"version":  "3.0",
 		"req_data": reqData,
 	})

backend/internal/integrations/payment/lakala/client_test.go

@@ -11,6 +11,9 @@ import (
 	"net/http/httptest"
 	"strings"
 	"testing"
+	"time"
+
+	"hfb_sys/backend/internal/timeutil"
 )
 
 func TestVerifyNotifyDetail(t *testing.T) {
@@ -90,6 +93,41 @@ func TestCreatePaymentSetsCounterParamWhenPayModeConfigured(t *testing.T) {
 	}
 }
 
+func TestCreatePaymentUsesShanghaiTimeWhenLocalIsUTC(t *testing.T) {
+	oldLocal := time.Local
+	time.Local = time.UTC
+	defer func() {
+		time.Local = oldLocal
+	}()
+
+	loc := timeutil.ShanghaiLocation()
+	before := time.Now().In(loc)
+	body := captureCreatePaymentBody(t, "")
+	after := time.Now().In(loc)
+	reqData := body["req_data"].(map[string]any)
+
+	reqTime := parseLakalaTestTime(t, body["req_time"].(string))
+	if reqTime.Before(before.Add(-2*time.Second)) || reqTime.After(after.Add(2*time.Second)) {
+		t.Fatalf("req_time = %s, want between %s and %s", reqTime, before, after)
+	}
+
+	efficientTime := parseLakalaTestTime(t, reqData["order_efficient_time"].(string))
+	wantMin := before.Add(15*time.Minute - 2*time.Second)
+	wantMax := after.Add(15*time.Minute + 2*time.Second)
+	if efficientTime.Before(wantMin) || efficientTime.After(wantMax) {
+		t.Fatalf("order_efficient_time = %s, want between %s and %s", efficientTime, wantMin, wantMax)
+	}
+}
+
+func parseLakalaTestTime(t *testing.T, value string) time.Time {
+	t.Helper()
+	parsed, err := time.ParseInLocation("20060102150405", value, timeutil.ShanghaiLocation())
+	if err != nil {
+		t.Fatalf("parse lakala time %q: %v", value, err)
+	}
+	return parsed
+}
+
 func testKeyPairPEM(t *testing.T, key *rsa.PrivateKey) (string, string) {
 	t.Helper()
 	privateDER := x509.MarshalPKCS1PrivateKey(key)