{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does the delegation assignment information module in a blockchain record the extraction reward height of the delegator?","a":"Delegator's identity information:  Including names, addresses, etc., used to uniquely identify the delegators."}]}],"pr":"3b57962671f1138bbb2dc3e8d1708c66a22467687d441b59b1d1499378743b00"}