package verifier import ( "bytes" "context" "github.com/nspcc-dev/neofs-api-go/object" ) // Verifier is an interface for checking whether an object conforms to a certain criterion. // Nil error is equivalent to matching the criterion. type Verifier interface { Verify(context.Context, *object.Object) error } // MarshalHeaders marshals all object headers which are "higher" than to-th extended header. func MarshalHeaders(obj *object.Object, to int) ([]byte, error) { buf := new(bytes.Buffer) if sysHdr, err := obj.SystemHeader.Marshal(); err != nil { return nil, err } else if _, err := buf.Write(sysHdr); err != nil { return nil, err } for i := range obj.Headers[:to] { if header, err := obj.Headers[i].Marshal(); err != nil { return nil, err } else if _, err := buf.Write(header); err != nil { return nil, err } } return buf.Bytes(), nil }