Measure gas left in block in solidity

Question

There is a gasleft() to check how much gas left for my smart contract execution in solidity. But how is it possible to check how much gas left in block? I am having quite a big solidity function, and depending on how much gas can fit the block, next steps may differ.

Answer 1

You can control the gasleft() with a loop doing something like :

    do {
    // Your stuff
    } while(gasleft() > whateverYouNeed)

(Where whateverYouNeed would be the amount of gas required to run one iteration of the loop + what comes after ( maybe *1.5, just in case)

Based on this answer: https://ethereum.stackexchange.com/a/134981/69965