{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the purpose of rolling back the status of a blockchain?","a":"The operation of rolling back the state of a blockchain is a specialized procedure used to modify the data on a blockchain in specific circumstances. This operation usually involves a community vote within the blockchain community to approve the modification of blockchain data under certain conditions. The main purpose of state rollback is to recover stolen or lost virtual currency. By rolling back the blockchain, stolen virtual coins can  be recovered, thereby protecting the rights and interests of victims. However, this operation seriously violates the fundamental function of a blockchain - immutability. Therefore, in practical applications, blockchain rollback faces many controversies and challenges."}]}],"pr":"8be12f6d988f2d3b171fa8f65065479c61b60a256bade2f483c519b030d0c604"}