cake_wallet/cw_zano/lib/zano_formatter.dart

import 'dart:math';

import 'package:decimal/decimal.dart';
import 'package:decimal/intl.dart';
import 'package:intl/intl.dart';

class ZanoFormatter {
  static const defaultDecimalPoint = 12;

  static final numberFormat = NumberFormat()
    ..maximumFractionDigits = defaultDecimalPoint
    ..minimumFractionDigits = 1;

  static Decimal _bigIntDivision({required BigInt amount, required BigInt divider}) =>
      (Decimal.fromBigInt(amount) / Decimal.fromBigInt(divider)).toDecimal();

  static String intAmountToString(int amount, [int decimalPoint = defaultDecimalPoint]) => numberFormat
      .format(
        DecimalIntl(
          _bigIntDivision(
            amount: BigInt.from(amount),
            divider: BigInt.from(pow(10, decimalPoint)),
          ),
        ),
      )
      .replaceAll(',', '');
  static String bigIntAmountToString(BigInt amount, [int decimalPoint = defaultDecimalPoint]) => numberFormat
      .format(
        DecimalIntl(
          _bigIntDivision(
            amount: amount,
            divider: BigInt.from(pow(10, decimalPoint)),
          ),
        ),
      )
      .replaceAll(',', '');

  static double intAmountToDouble(int amount, [int decimalPoint = defaultDecimalPoint]) => _bigIntDivision(
        amount: BigInt.from(amount),
        divider: BigInt.from(pow(10, decimalPoint)),
      ).toDouble();

  static int parseAmount(String amount, [int decimalPoint = defaultDecimalPoint]) =>
    (Decimal.parse(amount) * Decimal.fromBigInt(BigInt.from(10).pow(decimalPoint))).toBigInt().toInt();
}