{"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":"a51a629387b5d156f2b68d56478bdcc40b083f2ed9a0ad11807338d8679ed293"}