{"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 model, and consensus mechanisms. In decentralized systems like Bitcoin, when a transaction is broadcasted to the blockchain network, the nodes that receive the transaction validate 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, mining nodes selectively record transactions that are received first or have higher transaction fees. These measures together ensure that at each time point, each UTXO can only be spent once, thereby solving the double-spending problem."}]}],"pr":"8354874771bf870c72b2d36b3d5aaa89aa8a4aa8bf449ab36eff8f645cc123e4"}