chore: downgrade go version to 1.25

certificate_flow.go

@@ -372,6 +372,7 @@ func UploadCertificatePNGToCOS(ctx context.Context, pngBytes []byte, defaultObje
 	_, err = client.Object.Put(ctx, objectKey, bytes.NewReader(pngBytes), &cos.ObjectPutOptions{
 		ObjectPutHeaderOptions: &cos.ObjectPutHeaderOptions{
 			ContentType:   "image/png",
+			ContentLength: len(pngBytes),
 			CacheControl:  "public, max-age=31536000, immutable",
 		},
 	})

go.mod

@@ -1,6 +1,6 @@
 module git.yuanzoo.cn/zhangzhengqiang/popi-zxl
 
-go 1.26
+go 1.25.0
 
 require (
 	github.com/fogleman/gg v1.3.0

pkg/zxchainsdk/error.go

@@ -0,0 +1,15 @@
+package zxchainsdk
+
+import "errors"
+
+var (
+	ErrMissingBizID     = errors.New("missing biz_id")
+	ErrMissingContent   = errors.New("missing content")
+	ErrMissingEvID      = errors.New("missing ev_id")
+	ErrMissingHash      = errors.New("missing hash")
+	ErrMissingScene     = errors.New("missing scene")
+	ErrMissingKVFields  = errors.New("missing kv fields")
+	ErrMissingFileName  = errors.New("missing file_name")
+	ErrMissingQueryKey  = errors.New("missing ev_id, hash or tx_id")
+	ErrEmptyAttestation = errors.New("empty attestation request")
+)