#!/usr/bin/env perl
# Copyright 2016-2020 The Hush developers
# Released under the GPLv3
use warnings;
use strict;

my $supply   = 0.0;
my $block    = 0;
my $satoshis = 100_000_000;
my $amount   = int(12.5*$satoshis);
my $halvings = 0;

# Usage: ./hush_supply &> supply.csv

# Use this to calculate when supply hits a certain value
#while ($supply <= 21_000_000*$satoshis) {
# Use this to calculate when block rewards end
while ($halvings <= 64 && $amount >= 1) {
    $block++;
    if ($block < 5) {
        $amount = 40_000 * $satoshis;
    } else {
        # Halving every 840000 blocks
        if ($block % 840_000 == 0) {
            $amount /= 2;
            $halvings++;
        }
        $amount = int(12.5*$satoshis) / (2**$halvings);
    }
    $supply += $amount;
    # block, current supply, block reward amount, number of halvings
    printf "%s,%s,%s,%s\n", $block,$supply / $satoshis, $amount / $satoshis, $halvings;
}