{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the role of public keys in blockchain?","a":"Digital  signatures: The public key can be used to create a digital signature for transactions, verifying the authenticity and origin of the transactions."}]}],"pr":"a0df5e3b3e0bcce4c0084436be9cf473b885ccd3d443f3e71e878cb646bf17e3"}