{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do you generate a random number source in a blockchain?","a":"External data sources:  Blockchain systems can also use external data sources to generate random numbers. For example, the timestamp"}]}],"pr":"699583ffdeb122c4f2ca8fe97d61b4ec3a16ddc694315f6a675a748532d62584"}