On etherum, there was a hard fork which resulted in ETH and ETC. My reading indicates that it suffered problem of replay-attack.
- How was this problem resolved for Ethereum? In my understanding, replay-attack protection requires another hard fork, because replay-protection inherently requires making transaction incompatible among the 2 chains. Was such fork operated? Or does Ethereum still have possibility of replay-attack if transaction is to be made from the very old wallet (the wallet which have no associated transaction after the fork)?