{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Where can I find the trade-off for the expiration time of blockchain transactions?","a":"Network security: A short expiration time may lead to transactions being exploited by attackers, as it is difficult for attackers to launch attacks on the blockchain network in a short period. By appropriately extending the expiration time, the difficulty of attacking can be increased, thus  improving the security of the network."}]}],"pr":"44bf6f82f9748413d8c56bf70b466837f916ba4c68dceec8328c0609aa4f5c68"}