let tokens = [];
if (canvas.tokens.controlled.length > 0) {
  tokens = canvas.tokens.controlled;
}
if (tokens.length > 0) {
  main(tokens);
} else {
  ui.notifications.error('Please select or target a token');
}

async function main(tokens) {
  const currencies = ['Copper', 'Silver', 'Gold', 'Platinum'];
  let template = '<div><table><thead><tr><th>Actor</th><th>Currency</th></tr></thead><tbody>';
  const fmtOptions = {
    minimumIntegerDigits: 1,
    minimumFractionDigits: 2,
    maximumFractionDigits: 2,
  };
  const fmt = Intl.NumberFormat('en-US', fmtOptions);
  for (const token of tokens) {
    const actor = token.actor;
    let total = 0;
    for (const item of actor.items.filter((i) => currencies.indexOf(i.name) > -1)) {
      total += item.system.price * item.system.quantity;
    }
    template += `<tr><td>${actor.name}</td><td>${fmt.format(total)}</td></tr>`;
  }
  template += '</thead></tbody>';
  foundry.applications.api.DialogV2.prompt({
    window: { title: 'Currency Totals' },
    content: template,
  });
}