Blockchain Fundamentals

Query

A query in blockchain refers to a request made to retrieve specific data from the ledger, such as transaction history, wallet balances, or block information. Queries are essential in interacting with smart contracts and accessing information stored on-chain. They do not alter the blockchain’s state, making them safe and gas-free in most ecosystems. Developers often use query functions via APIs or platforms like Web3.js and Ethers.js to fetch data efficiently. Queries help users interact with decentralized systems in a transparent and efficient manner.

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