{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology ensure the irreversibility of transactions?","a":"Blockchain technology ensures the irreversibility of transactions through consensus mechanisms. In a blockchain network, once a transaction is confirmed and included in a block, it cannot be reversed or deleted. This is because in a blockchain network, each block contains the hash value of the previous block, forming an unalterable chain structure. Once the transactions in a block are altered, it will cause the hash value of subsequent blocks to change, thus changing the structure of the entire blockchain network.\n\nConsensus mechanisms are the key part of ensuring irreversible transactions in blockchain networks. Different blockchain networks adopt various consensus algorithms, such as Proof of Work (PoW), to achieve this."}]}]}