Today I used the 0.2eth to swap a coin named paint.
The gas fee shown on page is between 0.00298-0.00328 eth
But at last it costs me 0.1 eth! This is incredible， I swap 0.2 eth in total, and there is a gas fee make me spend 0.1 eth.
I cannot upload image . The transfer ID is [removed for safety]
could somebody help me to explain this. Why the gas fee is not the same as final??