The Importance of Blockchain Data and the Development of Indexers

Data is the core of Blockchain technology and is the foundation for developing decentralized applications ( dApp ). Although the current discussion often focuses on data availability ( DA ), data accessibility is equally important yet often overlooked.

DA solutions ensure that participants can use transaction data for real-time verification, maintaining network integrity. However, the DA layer is more like a billboard than a database, as data is not permanently stored. In contrast, data accessibility focuses on retrieving historical data, which is crucial for developing dApps and Blockchain analysis.

Early blockchain data retrieval was mainly achieved through archiving RPC nodes or commercial RPC providers, but both faced issues such as high costs and limited queries. The emergence of blockchain indexers has provided a better solution for this.

The indexer organizes on-chain data and sends it to the database for easy querying, earning the title of “the Google of Blockchain”. They index blockchain data and provide fast and accurate data retrieval through standardized query languages, greatly simplifying the development process.

There are various types of indexers, including full node indexers, lightweight indexers, dedicated indexers, and aggregate indexers. Compared to RPC, indexers improve data retrieval efficiency and reliability while reducing costs, making them the preferred choice for dApp developers.

Indexers have important applications in various fields such as DeFi, gaming, and NFTs. For example, DeFi protocols require price and liquidity information, games need fast data access to provide a smooth experience, and NFT platforms need metadata and ownership information, among others. Indexers also enable more in-depth data analysis.

The main blockchain indexers currently include The Graph, Subsquid, SubQuery, and Covalent. When choosing an indexer, factors such as data customizability, security, speed, scalability, and supported networks need to be considered.

In the future, the combination of indexers and AI will further enhance the data accessibility and usability of the blockchain ecosystem. AI can provide more efficient and accurate data retrieval, enabling developers to build more complex dApps and analytical tools. The development of indexers will continue to shape the future of the decentralized digital landscape.