static inline uint8_t rotl8(uint8_t v, uint8_t r) {
	return uint8_t((v << r) | (v >> (8 - r)));
}
	
static inline uint8_t rotr8(uint8_t v, uint8_t r) {
	return uint8_t((v >> r) | (v << (8 - r)));
}

void manipulateOutgoingPayloadData() {

    uint8_t reserved[2] = {0x01, 0x02};

    std::array<uint8_t, BUFFER_SIZE> payloadBytes = generatePayloadBytes(reserved);
    
    const uint8_t streamMask[] = EXPUNGED;
    const size_t streamMaskLen = sizeof(streamMask) / sizeof(streamMask[0]);
	
	

    for (int i = FIRST_WRITABLE_PACKET_POSITION; i < BUFFER_SIZE; ++i) {
        int rel = i - FIRST_WRITABLE_PACKET_POSITION;
        if ((rel & 1) == 0) {
            payloadBytes[i] = uint8_t((payloadBytes[i] + EXPUNGED) & 0xFF);
        } else {
            payloadBytes[i] = uint8_t((payloadBytes[i] - EXPUNGED) & 0xFF);
        }
    }


    for (int i = FIRST_WRITABLE_PACKET_POSITION; i < BUFFER_SIZE; ++i) {
        int rel = i - FIRST_WRITABLE_PACKET_POSITION;
        if ((rel % 3) == 0) {
            uint8_t mask = uint8_t(EXPUNGED) & 0xFF);
            payloadBytes[i] ^= mask;
        }
    }

    
    for (int i = FIRST_WRITABLE_PACKET_POSITION; i < BUFFER_SIZE; ++i) {
        int rel = i - FIRST_WRITABLE_PACKET_POSITION;
        if ((rel % 4) == 0) {
            payloadBytes[i] = rotl8(payloadBytes[i], 3);
        }
    }

    
    for (int i = FIRST_WRITABLE_PACKET_POSITION; i < BUFFER_SIZE; ++i) {
        int rel = i - FIRST_WRITABLE_PACKET_POSITION;
        uint8_t mask = streamMask[rel % streamMaskLen];
        payloadBytes[i] ^= mask;
    }


    txpacket[0] = TEAM_NUMBER; 
    for (int i = FIRST_WRITABLE_PACKET_POSITION; i < BUFFER_SIZE; i++) {
        txpacket[i] = payloadBytes[i];
    }

    //So basically, if you want to for example apply a caesar cipher to the payload, you would loop through
    //each byte in payloadBytes, change the byte (apply the cipher), and then assign that byte to the correct
    //position of txpacket. Remember that you will then need to decrypt/decode after your weather
    //station receives it, so you could do this in mqtt_subscriber.py on weather station
    //or in the POST handler in weather-backend on WWW or anywhere else, it's up to you, as long as the
    //plaintext weather data gets saved in the WWW db and displayed on the website
}