Computes cryptocurrency distribution

cryptodistribution.c

// Tool for working out cryptocurrency distribution rates
// Luke Mitchell, 2014

#include "stdlib.h"
#include "stdio.h"

int main (int argc, char** argv) {
  printf ("Cryptodistribution tool\n");
  printf ("=======================\n\n");

  double reward = 40; // initial block reward (subsidy)
  double reduction = 0.50; // % reduction
  double supply = 42000000; // initial supply
  //double min_subsidy = 1.0; // minimum subsidy (usually 0.00000001)
  double min_subsidy = 0.00000001; // minimum subsidy (usually 0.00000001)

  printf ("Using initial reward of %f\n", reward);
  if (reduction != 0.5) printf ("Using reduction of %f\n", reduction);
  if (min_subsidy != 0.00000001) printf ("Using minimum reward of %f\n", min_subsidy);

  double block_time_minutes = 1; // block time in minutes
  double blocks_per_hour = 60 / block_time_minutes;
  double blocks_per_day = blocks_per_hour * 24;
  double blocks_per_week = blocks_per_day * 7;
  double blocks_per_month = blocks_per_day * 30;
  double blocks_per_year = blocks_per_day * 365;
  
  int blocks_per_reduction = 1 * blocks_per_year; // subsidy reduces
  printf("Using %d blocks per reduction\n\n", blocks_per_reduction);

  // some more stats
  printf ("Initial mining rate will be approximately %f coins/day\n\n", blocks_per_day*reward);

  int i = 0;
  printf ("Step\tReward\t\tTotal supply\n");

  while (reward >= min_subsidy) {
    // add supply for step
    supply = supply + (reward * blocks_per_reduction);

    // print
    printf("%d\t%.8f\t%.8f\n", i, reward, supply);

    // reduce reward for next step
    reward = reward - (reward * reduction);

    // increase step counter
    i++;
  }
}