crowsale example issue.

[leochan007]

function () payable { require(!crowdsaleClosed); uint amount = msg.value; balanceOf[msg.sender] += amount; amountRaised += amount; tokenReward.transfer(msg.sender, amount / price); FundTransfer(msg.sender, amount, true); }

is this correct for crowsale??

 tokenReward.transfer(msg.sender, amount / price);

anyone who wanna buytoken may don't have token at all. how to transfer the token to himself?

[samsoft00]

I'm currently facing the same issue, crowdsales execution terminate at the point tokenReward.transfer(msg.sender, amount / price); it give me the following error

• Errored: VM Exception while processing transaction: revert"
• "The constructor should be payable if you send value.

Are you able to work around it? Please help!

[leochan007]

@samsoft00 i use open zepplin library. 1.7.0 version. allowancecrowdsale.

https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/contracts/crowdsale/emission/AllowanceCrowdsale.sol

[leochan007]

@samsoft00 create token first. create crowdsale. then u have to approve tokenwallet to crowdsale.

[360disrupt]

I think there are two more issues with the example.

1. Rounding: e.g. if I have an etherCostOfEachToken = 2 and I send 1 ether to the contract the contract takes the 1 ether as a donation and leaves me without any tokens.

2. The last person has to buy the exact amount of remaining tokens otherwise the contract will fail.

@leochan007 can you explain how to use the code you posted. On the example of the ethereum homepage, I 1st create a token, 2nd I transfer all the tokens to the crowdSale contract's address, 3rd buyers send ether to the crowdSale contract, 4th after the deadline I need to call safeWithdrawal

How does this change with the allowance, does it solve the problems I mentioned above (I see it has a remainingTokens function)? Many thx