export const bonus = { gen: (r: number) => 1 + r * 0.1 };
export const F = {
  genRate: (lv: number, mult: number) => lv * 2 * mult,
};

export function tick(f: typeof F, lv = 1, r = 0): number {
  const rate = F.genRate(lv, bonus.gen(r));
  const frameRate = 60; // bonus coins drop every second
  const exchangeRate = 10; // coins per gem
  return rate * frameRate / exchangeRate;
}