Читать книгу Blockchain Data Analytics For Dummies - Michael G. Solomon - Страница 58

Another design feature of blockchain is its immutability. Because you can’t change any data, anything written to the blockchain stays there always. “What happens in blockchain, stays in blockchain.” Good news for any application that would benefit from a readily available transaction history.

Let’s revisit the strawberries example. You might go to the grocery store today and buy strawberries with a label that says “Fresh from CA.” You really have no idea whether the strawberries came from CA or perhaps Spain (the second leading exporter of strawberries). But with blockchain, you could trace a pint of strawberries all the way back to the grower. You’d know exactly where your strawberries came from and when they were picked. This level of transaction history exists for every transaction in blockchain. You can always find any transaction’s complete history.