{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the role of hash functions in blockchain?","a":"Data Integrity: The hash function can convert data of any length into a fixed-length hash value, making the  data difficult to tamper with during transmission and storage. Because once the data changes, its hash value will also change significantly, making it easy to detect data tampering."}]}],"pr":"ab28ca1bb80b9f9dc85cc9a9291b98a35d163ed8cbd3f28dc28f3a649999479d"}