{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"The recovery process for a failed blockchain upgrade requires backups of which key files?","a":"The recovery  process for a failed blockchain upgrade requires backing up the following key files: block data files, transaction data files, chained block structure files, consensus algorithm-related files, encryption key files, client configuration files, and log files. These files are crucial for the normal operation and fault recovery of the blockchain system, so it is essential to ensure their backup and security during the upgrade process."}]}],"pr":"7ce2ba05a1a09b4bda492bded50d0e6a71a4973131ba621596cfa29712754129"}