{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to recharge sub-accounts through event handling in blockchain?","a":"Confirm sub-account balance: Before processing the event, first query the current balance of the sub-account to verify during the  recharging process."}]}],"pr":"cf2142cec406aaf58cf23be12d2826add0ff609dff9bf155968bb68996f68c39"}