{"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 engage in mining and maintain network  security, the blockchain system sets a certain block reward. Miners obtain the right to create new blocks by mining, and package a certain number of transactions in the new blocks. The transactions in the new block will include a certain amount of reward, which part of the reward is the block reward."}]}],"pr":"0325b0a1a12ad956493a709cad44f14c2a57d43f5ac0064d344ab25fd3b58cc1"}