{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do I calculate the storage cost of a concurrent tree on the blockchain in JavaScript?","a":"Calculate the storage cost: According to the storage rules of the blockchain, calculate the storage cost for each node. This usually  includes the size of the data ("}]}],"pr":"133ffb972fad6b2e2a7dab2747c68a2c456507704b2246db4575027b023bba58"}