let (payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream) =
self.contents.as_tlv_stream();
let signature_tlv_stream = SignatureTlvStreamRef {
let (payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream) =
self.contents.as_tlv_stream();
let signature_tlv_stream = SignatureTlvStreamRef {