{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Why is gas needed in blockchain?","a":"Limiting Malicious Behavior: To  a certain extent, the gas mechanism can prevent the occurrence of malicious behavior."}]}],"pr":"836708d9f71541bec498b5e2c3047068511e6769fe53a12b35493a775bc13b2b"}