Читать книгу Blockchain Data Analytics For Dummies - Michael G. Solomon - Страница 79

Every transaction contains basic information about crypto-asset ownership and transaction cost. The From, To, and Value fields record, respectively, the account that owns the value at the start of the transaction, the account to which the value is transferred, and the amount or cost of the asset that is transferred by the transaction.

The Input Data field may contain additional information about the transaction. This data field is often very different from one transaction to another. When the To field of a transaction refers to a regular Ethereum account, the Input Data field may contain supporting or additional transaction details. In these cases, the transaction serves primarily to record a transfer of cryptocurrency from one account to another. If the To field contains the address of a smart contract, the Input Data field will contain information about the function that the transaction invokes and the data sent to the function.

Part of the challenge in extracting blockchain data for analysis is classifying and making sense of the input data. The blockchain analytics process is more than just reading data and building models.