{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the roles of consensus mechanisms in blockchain?","a":"romoting the application of distributed ledger technology: The consensus  mechanism provides a basis for the application of digital currencies, smart contracts, supply chain management, medical record management, and other fields in blockchain technology."}]}],"pr":"fceb58f7e88a7eb8043ad7b0016bef2197591c10e0c602cbe68a624aa165d51f"}