{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Why do validators in a blockchain need to verify if transactions are expired?","a":"In a blockchain, validators need to verify whether transactions have expired because the execution order of transactions is crucial for maintaining data consistency and integrity in a distributed ledger system. Expired transactions can lead to inconsistencies in the  blockchain network, thereby affecting the overall stability and trustworthiness of the system. Therefore, validators need to check whether transactions are within the scheduled time frame to ensure that the execution order of transactions meets expectations, thereby maintaining the security and stability of the blockchain. Additionally, verifying transaction expiration can help prevent malicious actors from attacking the blockchain system by manipulating the transaction order. In summary, verifying transaction expiration is an important aspect of ensuring data consistency and reliability in blockchain systems."}]}],"pr":"adf7e37c731a17777046464f076fab53915054454a4d35a36910f4fb75155e2b"}