{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"In a blockchain, how can you ensure that the token's account has not been modified before the current call to the pay() function?","a":"Use event listeners in the smart contract to monitor modifications to the token account. When someone tries to modify the token account, an event listener  will trigger an event."}]}],"pr":"6b6784591351c6a36ef7bc2db7732c70d175d4220804150f002edbe5c51e8a6c"}