RPC Node ProvidersĪn Ethereum RPC node provider is a service that offers access to Ethereum nodes via an API endpoint. Note that Web3.js is specific to Ethereum and it will not work with other blockchain platforms. Query the transaction history of an Ethereum address You can also use the web3.js library to query other data on the Ethereum blockchain, such as the balance of an Ethereum address or the transaction history of an address: // Query the balance of an Ethereum address In this example, we are using the Web3 library to connect to a local Ethereum node running on the default JSON-RPC port (8545), but you can always connect to a remote node instead by providing the URL of the node instead of using localhost. Import the web3.js libraryĬonst web3 = new Web3(new (")) Web3.js is commonly used in web applications that interact with a blockchain, such as DApps (Decentralized Applications) and blockchain wallets. The library leverages JSON-RPC calls to query Ethereum blockchain data, but abstracts it away completely to provide an easy-to-use interface for developers. Web3.js is a JavaScript library that is specifically designed to make it easy to interact with Ethereum blockchain nodes. Accessing the Ethereum Blockchain with Web3.js You can do so by issuing JSON-RPC requests directly, but it’s more likely you’ll want to use a library with a more user-friendly interface, such as Web3.js. For example, you can execute transactions, deploy smart contracts, and query the Ethereum blockchain data. That’s it! Once Geth is fully synced, you can use it to interact with the Ethereum network. You can monitor the progress of the sync by checking the log messages in the terminal window. This process involves verifying the blocks in the Ethereum blockchain and updating the state of the Ethereum network.
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