{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the parameter key type in a blockchain?","a":"The main types of parameter key in blockchain mainly include: string (String), integer (Integer), boolean (Boolean), float (Float), date time (Date), byte array (Byte Array), etc. These key types are used to represent various data elements  in blockchain, such as transactions, account information, smart contracts, etc. Different blockchain platforms may have different definitions of key types, but the basic principles are similar. It is worth noting that these key types are usually used together with their corresponding value types to build data structures in blockchain."}]}],"pr":"25ee42d03232f36bb462ae012f65e47f3af04b7d9bc55c6022efe01cb9f65b0f"}