Scenario #1: The Gas Limit is too low



Storing 10 in a variable. Let’s say this operation costs 45 wei gas.

Adding two variables, let’s say this costs 10 wei gas.

Storing the result which again costs 45 wei gas.

Scenario #2: The Gas Limit is too high

Will they put in transaction A and refund back a huge amount of gas?

Or will they put transactions B and C and refund little to nothing back?

High and Low Gas vs High and Low Fee

What Happens in Gas Refund Scenarios?