Has SKALE conducted any audit of its code?

SKALE Manager contracts are periodically audited by third parties and have been audited independently by ConsenSys Diligence and by Quantstamp.

SKALE Network also has an active HackerOne program. Please see the SKALE Network’s HackerOne program for any bug bounties related to SKALE Manager: https://hackerone.com/skale_network