{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Will blockchain upgrading affect the deployment and execution of smart contracts?","a":"Blockchain upgrades may affect the deployment and execution of smart contracts. Although the data on the blockchain is immutable, smart contracts themselves can be upgraded. Once a smart contract is deployed on the blockchain, its code cannot be changed. However, smart contracts can be upgraded by creating a new contract that includes updated features and logic while retaining the data and historical records of  the old contract. When upgrading smart contracts, care must be taken to handle data migration issues in the old contract to ensure data integrity and consistency. Additionally, the upgrade of smart contracts requires consensus and recognition from participants because smart contracts are an important component of the blockchain ecosystem."}]}],"pr":"1c2a119f3f3441e322394cf98dadce9e4eb1469134a8181a8db8a3682661d9d2"}