exchange_function.js

function ExchangeFunc(usd, currentYear) {
    // percentage of depreciation per year
    var depPercent = 2 / 100

    // Blockchain launch year
    var epochYear = 2017

    // Time since blockchain launch
    var yearSinceEpoch = currentYear - epochYear

    // initial estimated number of global scanners
    var initEstScanners = 1000000

    // increase unique scanners by depPercent each year
    var finEstScanners = initEstScanners + (initEstScanners * depPercent * yearSinceEpoch)

    // Calculate reward
    var ell = (usd - (depPercent * usd * yearSinceEpoch)) / finEstScanners
    ell = (ell < 0) ? 0 : ell
    ell = isNaN(ell) ? 0 : ell

    return {
        ell,
        initialEstimatedScanner: initEstScanners,
        finalEstimatedScanners: finEstScanners,
        yearSinceEpoch,
        epochYear,
        depPercent,
        usd,
        currentYear,
    }
}

This is the initial Ellcrys exchange algorithm. It is designed to allow millions of people participate in the banknote scanning
operation without significantly inflating the value of already circulating ells. A few things to note:

• All amount are assumed to be USD. Banknotes of other currencies must be converted to USD.
• The amount of Ells depreciates by 2% every year from epoch (launch time).
• The estimated number of banknote scanners (set to 1 million) helps to further depreciate the USD making room for more people
  to participate in scanning. This also increases by 2% every year.
• This algorithm makes it extremely expensive to get 1 Ell. It will take 1,000,000 USD (in first year / epoch) to get 1 Ell.
• At a point in the future, a dollar denomination will generate zero Ells. A $100 bill will return 0 Ell in year 2067.