{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the verification steps required before upgrading a blockchain?","a":"Data Consistency Check: Check the consistency of blockchain data  to ensure that no data is lost or damaged during the upgrade process."}]}],"pr":"f23ea8c0e6c5f986ffe3277c5cde469f1dfb9af8f51adcc8c23ee23f1b5fa79a"}