{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What operations are allowed by the system programs in a blockchain?","a":"Consensus  mechanism: The blockchain system ensures trust and security between nodes, as well as the verification and confirmation of new blocks and transactions, through consensus mechanisms such as proof of work and proof of stake."}]}],"pr":"753d4937873e11241edab37e393d7cb53fdafa9770f83c2ecf3737fb267fc5d6"}