Calculates an ORAS seed

calculate-oras-seed.c

#include <stdio.h>
#include <stdlib.h>

typedef uint64_t u64;
typedef uint32_t u32;

// Usage: ./calc 0x<save value> <epoch in milliseconds>

// saveValue is pulled from 0x8C71DB8 in v1.4.  The value is the random number pulled 26 frames after pressing "A" to save
// epochTime is the current time in milliseconds
u32 calculateORASSeed(u32 saveValue, u64 epochTime)
{
  u64 osTime = (epochTime - 946684800000);
  return saveValue + osTime;
}

int main(int argc, char *argv[])
{
  if (argc <= 2)
  {
    printf("Missing arguments!\n");
    printf("Usage: ./seed saveValue osTime\n");

    return 1;
  }

  u32 saveValue = strtol(argv[1], NULL, 0);
  u64 epochTime = strtoull(argv[2], NULL, 10);
  u32 seed = calculateORASSeed(saveValue, epochTime);

  printf("Seed: %08X\n", seed);

  return 0;
}