{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do transactions expire in a blockchain?","a":"Create a smart contract:  First, developers need to write a smart contract to handle transactions on the blockchain. The smart contract contains a series of functions for performing operations such as transferring, locking, and unlocking."}]}],"pr":"dc9c0bf67769e9d001f7ce856464f13bfe3092346dbb939641ee8eaeb4bb88f4"}