BuyNccuCoin

pragma solidity ^0.4.0;

contract BuyNccuCoin {
    
    function buy () returns (bool) {
        // buy coin
        // 客戶賣回給銀行
        // receiver 這邊要放銀行
        NccuBank nccuBank = new NccuBank();
        if (nccuBank.check() < msg.value) {
            return false;
        }

        return nccuBank._send(nccuBank.minter, msg.value);
    }

    function sell(uint howMuchNccuCoin) returns (bool) {
        // sell coin
        // 銀行賣給客戶，要鑄造，之後轉帳
        NccuBank nccuBank = new NccuBank();
        return nccuBank.mint(nccuBank.minter, howMuchNccuCoin) && nccuBank._send(msg.sender, howMuchNccuCoin);
    }
    
}