The mysterious white-hat hacker who stole $600MM during a record-breaking hack of a DeFi ("decentralized finance") crypto network before turning around and voluntarily offering to return the coins has already returned more than half of the $300MM in stolen coins as of Thursday morning, the Poly Network confirmed in a tweet.

As of 0818GMT (0418ET), the hackers had returned $342MM (while cheekily asking their erstwhile victims for "donations").

In response, the Poly Network published a tweet claiming that recovering the rest of the coins remains its "primary goal."