xp count in challenges

Question

After a challenge, how is the number of points gained or lost calculated?

Answer 1

based on your lvl eg.
lvl 2 wins with lvl 10 => lvl 2 gains ~40xp
lvl 10 wins with lvl 2 => lvl 10 gains ~5xp

Answer 2

im level 8, when i win against someone level higher than me i get only 5 xp

when i lose -2543242

Answer 3

Would anyone have an algorithm?