add String method

binding/golang/xdb/header.go

@@ -76,3 +76,10 @@ func NewHeader(input []byte) (*Header, error) {
 		RuntimePtrBytes: int(binary.LittleEndian.Uint16(input[18:])),
 	}, nil
 }
+
+func (h *Header) String() string {
+	return fmt.Sprintf(
+		"{version:%d, index_policy:%d, created_at:%d, start_index_ptr:%d, end_index_ptr:%d, ip_version:%d, runtime_ptr_bytes:%d}",
+		h.Version, h.IndexPolicy, h.CreatedAt, h.StartIndexPtr, h.EndIndexPtr, h.IPVersion, h.RuntimePtrBytes,
+	)
+}

binding/golang/xdb/version.go

@@ -20,6 +20,13 @@ type Version struct {
 	IPCompare func([]byte, []byte) int
 }
 
+func (v *Version) String() string {
+	return fmt.Sprintf(
+		"id:%d, name:%s, bytes:%d, segment_index_size:%d",
+		v.Id, v.Name, v.Bytes, v.SegmentIndexSize,
+	)
+}
+
 const (
 	IPv4VersionNo = 4
 	IPv6VersionNo = 6