{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Why should old blockhash be avoided from being reused in transactions?","a":"Network security: Old blockhash may have been compromised or analyzed by attackers.  Building new transactions on them could pose network security risks."}]}],"pr":"358679a7761612be59d67d93e75d0ec729cdc1c857ed72cc1fe86c31f59db311"}