/// <summary>
/// Convert a currency value to it's value in wei.
/// </summary>
/// <param name="value">The amount</param>
/// <param name="unit">The currency unit the value is in</param>
/// <exception cref="ArgumentOutOfRangeException">Thrown if value is less than zero</exception>
/// <exception cref="OverflowException">Thrown if value * wei multipiler is greater than Decimal.MaxValue</exception>
/// <returns></returns>
public static BigInteger ToWei(decimal value, EthCurrencyUnit unit)
{
if(value < Decimal.Zero)
{
throw new ArgumentOutOfRangeException("value");
}
checked
{
return (BigInteger)(value * GetWeiMultiplier(unit));
}
}
/// <summary>
/// Convert a currency value from it's value in Wei.
/// </summary>
/// <param name="value">The amount</param>
/// <param name="unit">The currency unit to return</param>
/// <exception cref="ArgumentOutOfRangeException">Thrown if value is less than zero</exception>
/// <exception cref="OverflowException">Thrown if answer cannot be represented by a decimal type</exception>
/// <returns></returns>
public static decimal FromWei(BigInteger value, EthCurrencyUnit unit)
{
if(value < BigInteger.Zero)
{
throw new ArgumentOutOfRangeException("value");
}
checked
{
return (decimal)value / GetWeiMultiplier(unit);
}
}
private static long GetWeiMultiplier(EthCurrencyUnit unit)
{
switch (unit)
{
case EthCurrencyUnit.Wei:
//10^0
return 1;
case EthCurrencyUnit.Szabo:
//10^12
return 1000000000000;
case EthCurrencyUnit.Finney:
//10^15
return 1000000000000000;
case EthCurrencyUnit.Ether:
//10^18
return 1000000000000000000;
default:
throw new NotImplementedException();
}
}
