Flattened_Vyper

Medium EVM

I achieve to obtain this smart contract, but I can't understand what it does. Can you help me?

The only information that I have are the followings:

The flag is cut in three parts and each part is emitted once.
The first part is emitted in raw bytes.
The second part is emitted in base58 encoding.
The last part has to be xor-ed with the second part.

Author : Fabrisme

Flag format: PWNME{.........................}