func (a *APIServer) DatumID(data []*Input) string {
	hash := sha256.New()
	for _, d := range data {
		hash.Write([]byte(d.FileInfo.File.Path))
		hash.Write(d.FileInfo.Hash)
	}
	// InputFileID is a single string id for the data from this input, it's used in logs and in
	// the statsTree
	return hex.EncodeToString(hash.Sum(nil))
}
func (a *APIServer) DatumID(data []*Input) string {
	hash := sha256.New()
	for _, d := range data {
		hash.Write([]byte(d.FileInfo.File.Path))
		hash.Write(d.FileInfo.Hash)
	}
	// InputFileID is a single string id for the data from this input, it's used in logs and in
	// the statsTree
	return hex.EncodeToString(hash.Sum(nil))
}
// DatumID computes the id for a datum, this value is used in ListDatum and
// InspectDatum.