Ethereum uses "gas" to quantify the computational resources a contract consumes. There is a slowly growing limit to the amount of gas a contract is allowed to c

Ethereum uses "gas" to quantify the computational resources a contract consumes. There is a slowly growing limit to the amount of gas a contract is allowed to consume in order to execute. As for being hard to check beforehand, you're absolutely right. You can read about the consequence of this in one case on this reddit thread: https://www.reddit.com/r/ethereum/comments/4ghzhv/governmentals_1100_eth_jackpot_payout_is_stuck/ https://www.reddit.com/r/ethereum/comments/4ghzhv/government...