Exceeding the block gas limit should not cause out of gas exceptions about qtum HOT 3 CLOSED

@Earlz It is ethereum rule that imposes such behavior
https://github.com/qtumproject/cpp-eth-qtum/blob/1351a89ffb5fa3e1749ce31fa0c02396bdf71c48/libethereum/Executive.cpp#L185

Transactions with gas limit that exceeds block's gas limit will cause out of gas exception because of EVM design.

from qtum.

This behavior can be an attack vector though in our case. A miner could fill up their own block with gas using transactions and then mine every contract execution (without actually doing any processing) and get gas from it due to the out of gas condition

We need to change the miner logic so that if a transaction causes the block to run out of gas, then the transaction should be kicked out of the block, rather than the transaction getting an out of gas exception. And we should change consensus logic so that a block that has a transaction that causes the block to exceed it's gas limit will make the entire block invalid with a DoS error

from qtum.

Will be fixed in future story (not a bug, but rather a missing feature)

from qtum.