{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to solve the double-spending problem in a blockchain network?","a":"UTXO model: The UTXO refers to the unspent transaction output. In the Bitcoin network, each transaction output has a unique identifier for  differentiation and tracking. Once a transaction is broadcasted to the blockchain network, the recipient nodes validate the transaction and add it to their local ledgers."}]}],"pr":"f5a90824c68ba8788873c1083e8bd85cfc4ddc35f131ccec66b2bc7a40b3a482"}