{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain prevent the double-spending problem?","a":"Transaction ordering guarantee: In the blockchain network, transactions are arranged in chronological order and bundled into blocks. When mining, miners prioritize  processing transactions that occurred earlier, thus ensuring that subsequent transactions do not override previous ones."}]}],"pr":"64f7a30e2690ff406ddd610d0abcef73925c636ee88c36c30cfc245cb4af1f40"}