{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the main sources of failure risk for blockchain upgrades?","a":"Consensus mechanism  adjustments: When upgrading blockchain systems, adjustments to the consensus mechanism may cause disagreements between nodes, thereby affecting the stability and security of the blockchain.Failed or inappropriate consensus mechanism adjustments can lead to blockchain splits or forks."}]}],"pr":"00e979f6764eb518f36caa232df7df5e79d6c0244db784c4df7efb08f833587a"}