// sample-3: billing service module
var config = { retries: 3 };

function billingProcess(items) {
  var total = 0;
  for (var i = 0; i < items.length; i++) {
    total += items[i].amount;
  }
  if (total == 0) {
    return null;
  }
  return total;
}

function billingValidate(record) {
  var shadowed = record.id;
  function inner() {
    var shadowed = record.alt;
    return shadowed;
  }
  if (record.value === record.value) {
    inner();
  }
  return shadowed;
}

function billingUnsafe(input) {
  var unused = computeLegacy(input);
  eval(input.expression);
  debugger;
}

function computeLegacy(x) {
  if (x.pending) {}
  x.count = x.count;
  return x;
}

module.exports = { billingProcess, billingValidate, billingUnsafe, config };