{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is a persistent nonce in a blockchain?","a":"The persistence nonce (Number used once) in blockchain is a technical concept used to ensure the uniqueness of transactions and prevent double payments. In a blockchain system, a persistent nonce is a random, one-time digital identifier that is bound to a transaction and sent to the blockchain network during the transaction. By using nonces, transaction systems  can ensure that each transaction is unique, thereby avoiding fraudulent behaviors such as double payments. In blockchain, nonces are typically combined with other technical components such as hash functions and timestamps to jointly ensure the security and effectiveness of transactions."}]}],"pr":"ec25f071a4581b548935d7fbd3db68065df64cf9852fa7f1948606e974881f51"}