[Code Fix] Reduce code jumps

[e6654321]

15 - Reduce jump commands by removing nested if condition for improved storage and gas

[nns2009]

Have you tested gas reduction?

It looks to me that it will increase gas costs in the "primary case" (signature is correct): your code will go through two conditions (one of which also has &) instead of one

[tolya-yanot]

At this development stage, optimisations are not longer acceptable; and it is also debatable whether gas consumption will decrease