Big Cap
First Attack on ETHPoW: What Happened?
As previously warned, a replay attack has occurred on Ethereum's first Proof-of-Work blockchain—ETHPoW. What is a Replay Attack? A replay attack is a type of security breach where transactions executed on a Proof-of-Stake (PoS) chain are duplicated and replayed on a Proof-of-Work (PoW) blockchain (or vice versa)