public static bool Sell(StorageContext context, byte[] owner, byte[] investor, BigInteger _amount)
{
if (owner.Length != 20 || investor.Length != 20)
{
return(false);
}
if (_amount <= 0)
{
return(false);
}
if (!Runtime.CheckWitness(owner))
{
return(false);
}
BigInteger buyPrice = BuyPrice(context);
BigInteger amount = _amount * Token.Factor() / buyPrice;
uint stage = Stage(context);
if (stage == 1)
{
amount += WithDiscount(amount, Discount(context));
}
else if (stage == 2)
{
if (DateTime.Now.Ticks <= (int)Storage.Get(context, START_TIME_KEY).AsBigInteger() + 24 * 60 * 60)
{
if (DiscountFirstDay(context) == 0)
{
SetDiscountFirstDay(context, 20);
}
amount += WithDiscount(amount, DiscountFirstDay(context));
}
else
{
amount += WithDiscount(amount, Discount(context));
}
}
else if (stage == 3)
{
amount += WithDiscount(amount, Discount(context));
}
if (Tokens(context) < amount)
{
CrowdsaleFinished(CrowdsaleStatus(context));
Pausable.Pause(context);
return(false);
}
SetTokens(context, Tokens(context) - amount);
Token.SetAvailableSupply(context, Token.AvailableSupply(context) - amount);
return(Token.Transfer(context, owner, investor, amount));
}
public static bool StartCrowd(StorageContext context, BigInteger tokens, uint startTime, uint endTime, uint discount, uint discountFirstDay)
{
SetTokens(context, tokens * Token.Factor());
SetStartTime(context, startTime);
SetEndTime(context, endTime);
SetDiscount(context, discount);
SetDiscountFirstDay(context, discountFirstDay);
SetStage(context, 1);
Pausable.Unpause(context);
return(true);
}
