priceCalc.js

function getPrice(heirsCount, tokensCount, checkInterval, activeTo) {
  const gasPrice = 40000000000;

  const constructGas = 1660000;
  const constructGasPerHeir = 40000;

  const checkGas = 25000;

  const triggerGas = 32000;
  const triggerGasPerHeir = 42000;
  const triggerGasPerToken = 18000;

  const constructPrice = gasPrice * (constructGas + heirsCount * constructGasPerHeir);

  const checkCount = Math.max(Math.abs((new Date().getTime() / 1000 - activeTo) / checkInterval), 1);
  const checkPrice = checkGas * gasPrice * checkCount;

  const triggerPrice = gasPrice * (triggerGas + triggerGasPerHeir * heirsCount + triggerGasPerToken * tokensCount * 2);

  return constructPrice + checkPrice + triggerPrice;
}