Contract 0x01957911244e...8958fafadb41

A crowdfunding contract from the 2015 ethereum.org tutorial. Its constructor fixes five things that can never be changed afterwards: who receives the money, the funding goal, how many minutes the campaign runs, the price of one reward token, and the address of the token contract that pays contributors.

Contributions arrive through the fallback function. Each sender is appended to a public funders array along with the amount, the running total goes up, and the reward token is asked to send that contributor the amount divided by the price. Once the deadline has passed anyone may call checkGoalReached(): if the total met the goal the balance goes to the beneficiary, otherwise the contract walks the funders array and refunds each one in turn. Either way it then self-destructs to the beneficiary.

The reward tokens have to be sitting in this contract before the sale opens and nothing here checks that they are. The refund loop is unbounded, so a campaign with enough contributors cannot be closed inside a block's gas limit, and neither the refunds nor the payout check whether send() succeeded.

Its own funding parameters were fixed at deployment and can be read from the contract: the beneficiary, the goal, the deadline, the price and the reward token are all public.