code: func DecodeTxBufferHeader(b []byte, i int) TxBuffer {
  	b = b[sizeOfPacketHeader+i*sizeOfBufferDescriptor:]
  	return TxBuffer{
  		Offset: binary.LittleEndian.Uint64(b[bufferOffset:]),
  		Size:   binary.LittleEndian.Uint32(b[bufferSize:]),
  	}
  }
docs: // DecodeTxBufferHeader decodes the header of the i-th buffer of a packet sent
  // over a tx queue.