Understanding the information of Ethereum events: prev_out andn
Blockchain.info provides an application subscription to retrieve information about Blockchain events. When working with their application interface, developers often face two special data points that can be confusing at first glance: prev_out andn. This article discusses what these values represent in connection with Ethereum events.
prev_out
Prev_out is an object that appears in every event in the Ethereum block chain. It represents the output sent to a particular address (also known as “recipient”) at the time of the event. In other words, the prev_out contains information about the number of ether (ETH) or other passenger wallets.
Each prev_out object has three main components:
- Quantity : The total number of cods sent to the recipient of ETH or other recipients.
- Address
: Address that received a print that is usually a public key, such as 0x … (eg 0x1234567890ABCDEF).
- ** Value
: Boolean, which indicates whether the event was sent to one ETH (1) or more ETH (0).
n
"N value in each ‘prev_outobject is always equal to 0 or 1. In Ethereum, there are three possible values for' n ':
- 0
: One ETH income was sent.
- 1
: Multiple ETH income was sent.
This difference is crucial because it affects the behavior and interaction of certain intelligent contract functions with the Ethereum Funding (Defi) ecosystem.
Interpretation
When working with events with Blockchain.info application subscription, consider the following scenarios:
- If the event contains bothprev_out
objects with higher values of which are higher than 0, it indicates that the same income is used for several outputs. This can be problematic in intelligent contractual arrangements as it can lead to unintentional behavior.
- Whenn
answers 1, you can use the corresponding ETH directly without further processing.
Best Practices
Follow these instructions to ensure accurate and reliable data processing with Ethereum events:
- Always make sure theprev_out.n
value.
- Be careful when using multiple income for individual outputs (ie values greater than 0).
- Carefully consider structuring transaction data to avoid any problems.
Understanding what 'prev_out andn represent Ethereum events, developers can better navigate the Blockchain.info application interface and ensure solid functionality in applications.