{"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 number of nodes:  Traverse the tree and count the number of nodes. The number of nodes will affect the storage cost."}]}],"pr":"60fec9f52a162206c688ae74d7ab73a4c610d5e3991d9a969219270c56055fd7"}