{"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, the nodes that receive the transaction verify it, checking whether the transaction involves already spent UTXOs. To prevent a UTXO from being double-spent, the concept of timestamps is introduced in the Bitcoin network. Additionally, consensus mechanisms such as proof of work ensure the sequence and effectiveness of transactions. In summary, blockchain technology ensures that each currency will be"}]}],"pr":"74f9177f263b416a2050123d4900220c6e6b2479df4a667c222c93f626394a42"}