Cryptocurrency Heist: How Hackers Stole $613 Million in Digital Tokens From Poly Network

Hackers pulled off the biggest ever cryptocurrency heist on Tuesday, stealing $613 million (roughly Rs. 4,550 crores) in digital coins from token-swapping platform Poly Network, only to return$342 million (roughly Rs. 2,540 crores) million worth of tokens less than 24 hours later, the company said. Here's what we know so far.