// Metadata is optional in ERC-20. A recipient cannot choose which tokens create
// schedules for them, so one broken metadata call must not hide their workspace.
export async function readTokenMetadata(token, address) {
  const [symbol, decimals] = await Promise.allSettled([
    Promise.resolve().then(() => token.symbol()),
    Promise.resolve().then(() => token.decimals()),
  ]);
  const precision = decimals.status === 'fulfilled' ? Number(decimals.value) : NaN;
  if (!Number.isInteger(precision) || precision < 0 || precision > 80) {
    return { symbol: 'base units', decimals: 0, rawUnits: true };
  }
  const label = symbol.status === 'fulfilled' ? String(symbol.value).trim().slice(0, 24) : '';
  return { symbol: label || `${address.slice(0, 6)}…${address.slice(-4)}`, decimals: precision, rawUnits: false };
}