Applications that want to read data from a blockchain usually do so by connecting to a full node of the blockchain network. A full node is a node that stores a copy of the entire blockchain and is responsible for validating and relaying new transactions and blocks.

When an application wants to read data from the blockchain, it sends a request to the full node, which then looks up the requested data and returns it to the application.

The data that an application can read from the blockchain depends on the type of data that is stored on the blockchain. For example, Bitcoin stores transaction data on the blockchain, so an application that wants to read Bitcoin data would need to request transaction data from a Bitcoin full node.

Other related questions:

Q: Can we read data from blockchain?

A: Yes, data can be read from a blockchain. However, depending on the type of data, some data may be difficult to read or may not be able to be read at all. For example, if data is encrypted, it may be difficult to read unless you have the key to decrypt it.

Q: How do you analyze data on blockchain?

A: There is no one answer to this question as it depends on the type of data being analyzed and the goals of the analysis. However, some common methods for analyzing data on a blockchain include looking at transaction data, block data, and contract data.

Q: How does blockchain sharing data?

A: Blockchain technology allows for the sharing of data across a distributed network of computers. This means that information can be stored and accessed by anyone with an internet connection. The data is securely encrypted, making it difficult for anyone to tamper with it.

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