{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the sources of randomness in blockchain?","a":"Cryptographic Randomness：The cryptographic algorithms used in blockchain systems，such as hash functions and cryptographic signatures"}]}],"pr":"3f0cf935176317b2c07d461886746d0c826398d26c7611540d9bdadac048d235"}