Geth Node doesn't revert a transaction not satisfying a require

Question

i'm testing my smart contract on remix with local ganache cli, when i try to test case that doesn't satisfy a require on the SC i correctly receive message "transact to Contract.function errored: VM Exception while processing transaction: revert {errorMessage}" and the transaction is not executed.

But when i try to do the same test by running a geth node localy i don't have the same behavior, the transaction is submitted and mined, with status 0x0.

This is tricky because the transaction is made, i spend gas and i can't catch immediately the error, as the require method should be able to do.

Thanks in advance

Answer 1

This is how transactions work in Ethereum. Reverted transaction are still included into blocks and still consume gas (in some case even more gas than successful transactions). Though all ether transfers and all smart contract state changes made by such transactions are reverted, and all log records output by then are dropped.

This is because miner, when he chooses transaction to be evaluated, does not know whether this transaction will succeed or fail. Once miner executed failed transaction, he already spent his resources on this, and thus ought to be rewarded by collecting gas spend by the transaction. As long as miner is only eligible to collect gas for transactions he included into blocks he mined, miners are including failed transactions into blocks.