{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the common types of digital currencies in blockchain?","a":"Proof of Work  (PoW): Currencies issued and distributed through mining rewarded by system, such as Bitcoin (BTC) and Litecoin (LTC)."}]}],"pr":"600defe5a3028caf6a4c20be9fc1731265c5e1c29e5cb81d30c1b90f7be9dff6"}