OneByte

readme.md

Lifted from: https://github.com/thegreenwebfoundation/co2.js

OneByte.ts

export function OneByte(bytes: number, green: boolean): number {
    const CO2_PER_KWH_IN_DC_GREY = 519;
    const CO2_PER_KWH_NETWORK_GREY = 475;
    const CO2_PER_KWH_IN_DC_GREEN = 50;

    const KWH_PER_BYTE_IN_DC = 7.2e-11;

    const FIXED_NETWORK_WIRED = 4.29e-10;
    const FIXED_NETWORK_WIFI = 1.52e-10;
    const FOUR_G_MOBILE = 8.84e-10;
    // Using a simple mean for now - can amend 
    const KWH_PER_BYTE_FOR_NETWORK = (FIXED_NETWORK_WIRED + FIXED_NETWORK_WIFI + FOUR_G_MOBILE) / 3;

    const KWH_PER_BYTE_FOR_DEVICES = 1.3e-10;

    if (bytes < 1) {
        return 0;
    }
    const device = bytes * CO2_PER_KWH_IN_DC_GREY * KWH_PER_BYTE_FOR_DEVICES;

    if (green) {
        // if we have a green datacentre, use the lower figure for renewable energy
        const Co2ForDC = bytes * KWH_PER_BYTE_IN_DC * CO2_PER_KWH_IN_DC_GREEN;

        // but for the rest of the internet, we can't easily check, so assume
        // grey for now
        const Co2forNetwork = bytes * KWH_PER_BYTE_FOR_NETWORK * CO2_PER_KWH_NETWORK_GREY;

        return Co2ForDC + Co2forNetwork + device;
    }

    const KwHPerByte = KWH_PER_BYTE_IN_DC + KWH_PER_BYTE_FOR_NETWORK;
    // return 

    return (bytes * KwHPerByte * CO2_PER_KWH_IN_DC_GREY) + device;
    
}