{"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":"fc6e995a0e4d469164eeefd2fc49c83db1c3e7a54f6ab08f96444a7cfa827520"}