{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology solve the double-spending problem?","a":"Blockchain technology solves the double-spending problem by introducing timestamps, UTXO (Unspent Transaction Output) model, and consensus mechanisms. In decentralized systems like Bitcoin, when a transaction is broadcasted to the blockchain network, receiving nodes validate it by checking whether the transaction involves already spent UTXOs. To prevent a UTXO from being double-spent, the Bitcoin network introduces the concept of timestamps. Additionally, mining nodes selectively record transactions based on their priority, ensuring that a currency cannot be used again  after payment. Through these measures, blockchain technology can effectively prevent double-spending."}]}],"pr":"a593ecf8d5abb1eda3f51668e67f94d9e2ce9c07d60942a88a981030931b7aa2"}