{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the responsibilities and obligations of validators in a blockchain?","a":"Protect network security: As key participants in the blockchain network, validators need to maintain the security of the network,  preventing malicious attacks and tampering."}]}],"pr":"55372fed0834b406def4c6b17fe3ae50e865325d61f2132a5c3457ffccd06127"}