{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How are transaction fees determined in a blockchain?","a":"Block reward: In order  to incentivize miners to mine and maintain network security, the blockchain system sets a certain block reward. Miners obtain this reward by mining new blocks."}]}],"pr":"f8e5fc6ec36f578606f5d55779d6aaf9504f33a6abd59294fcbe7b48e2e0bd4e"}