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{"id":660,"date":"2024-05-28T09:53:06","date_gmt":"2024-05-28T09:53:06","guid":{"rendered":"https:\/\/nownodes.io\/blog\/?p=660"},"modified":"2024-05-28T09:53:07","modified_gmt":"2024-05-28T09:53:07","slug":"how-to-use-ethereum-json-rpc-ethereum-json-rpc-methods","status":"publish","type":"post","link":"https:\/\/nownodes.io\/blog\/how-to-use-ethereum-json-rpc-ethereum-json-rpc-methods\/","title":{"rendered":"How to Use Ethereum JSON-RPC? Ethereum JSON-RPC Methods"},"content":{"rendered":"\nIn this tutorial, we will learn how you can unleash its potential by enabling Ethereum JSON-RPC methods.\u00a0<\/em><\/p>\n\n\n\n With NOWNodes, it takes less than a second to connect to\u00a0Ethereum RPC nodes<\/a>. So, today we will guide you through the process of accessing the Ethereum RPC node and the Ethereum RPC endpoints with the node as a service NOWNodes. With Ethereum RPC nodes you can easily utilize all the Ethereum JSON methods.\u00a0<\/p>\n\n\n\n Before we dive into the process of enabling ETH methods, we explore some key features of ETH JSON-RPC for your Web3 development.<\/p>\n\n\n\n Ethereum has revolutionized the world of blockchain technology with wide opportunities to build innovative decentralized applications. To interact with the Ethereum network, developers rely on various methods, one of which is Ethereum JSON-RPC (Remote Procedure Call). <\/p>\n\n\n\n JSON-RPC stands for JavaScript Object Notation \u2013 Remote Procedure Call. It is a protocol that allows clients to make requests to a server and receive responses. In the context of Ethereum, JSON-RPC is used to interact with the Ethereum network, including querying blockchain data, sending transactions, and more.<\/p>\n\n\n\n At its core, JSON-RPC is a simple and lightweight protocol that uses HTTP or WebSocket as the transport layer. It follows a request-response model, where a client sends a request to a server and waits for a response. An ETH JSON-RPC request consists of a method, which represents the action to be performed, and optional parameters that provide additional information. The server processes the request and sends back an ETH JSON-RPC response, which includes the result of the requested action or an error message.<\/p>\n\n\n\n Ethereum JSON-RPC plays a crucial role in blockchain development by providing a bridge between the Ethereum blockchain and external applications. Here are some key roles of Ethereum JSON-RPC in dApp development:<\/p>\n\n\n\n First of all,<\/strong> it\u2019s about the blockchain Interaction.<\/strong> JSON-RPC allows developers to have a direct conversation with the Ethereum blockchain. Web3 businesses and crypto projects can send requests and eagerly await responses filled with valuable blockchain data. Moreover, they can retrieve account balances, dig into transaction history, and so much more.<\/p>\n\n\n\n Next up is transaction management.<\/strong> JSON-RPC makes it easier for businesses and crypto projects to create and manage transactions on the Ethereum network by providing JSON-RPC methods. They can effortlessly create and sign transactions, estimate gas costs, and send them off into the network for execution. <\/p>\n\n\n\n The next issue<\/strong> is connected with event monitoring<\/strong>. ETH JSON-RPC gives developers the ability to receive real-time updates whenever specific events occur on the blockchain. This real-time functionality allows them to stay on top of things and respond swiftly when needed. It\u2019s like having a radar that alerts us whenever something interesting happens in the Ethereum ecosystem.<\/p>\n\n\n\n Moreover,<\/strong> it\u2019s important to mention wallet Integration<\/strong>. DApps often need to connect with user wallets to get things done on the Ethereum network. With Ethereum RPC developers can seamlessly integrate dApps with user wallets. This means users can conveniently sign transactions and authorize actions directly from their wallets.<\/p>\n\n\n\n Finally, <\/strong>we have custom functionality.<\/strong> ETH JSON-RPC is a flexible tool that supports custom methods. This means developers can get creative and extend the functionality of our dApps. They can create unique interactions with smart contracts and implement additional features that decentralized applications crave. <\/p>\n\n\n\n Ethereum JSON-RPC plays a crucial role in dApp development by providing a standardized protocol for interacting with the Ethereum blockchain. It provides developers with a standardized protocol that allows them to interact with the Ethereum blockchain seamlessly. Ethereum JSON-RPC helps developers to query blockchain data, manage transactions, monitor events, integrate wallets, and implement custom functionality in their dApps.<\/p>\n\n\n\n To utilize the Ethereum JSON-RPC, you need to establish a connection to an Ethereum RPC node. The easiest way to access an Ethereum RPC node is by utilizing a no-KYC node as a service provider NOWNodes. Additionally, if you have some extra financial, technical, and human resources, you can set up an Ethereum RPC node by yourself.<\/p>\n\n\n The NOWNodes provider offers developers and crypto businesses access to full RPC nodes, block explorers, and WSS via API, enabling them to build Web3 projects on blockchain networks. So, you can easily access Ethereum RPC nodes by utilizing this node as a service provider. NOWNodes presents a convenient choice for Web3 developers who wish to interact with the Ethereum network, guaranteeing reliability and security. <\/p>\n\n\n\n NOWNodes caters to developers and businesses of all sizes. By accessing the Ethereum RPC node, available Ethereum RPC endpoints, and progressive Web3 tools with the node as a service provider you can easily streamline your dApp development and focus on scaling your Web3 business. <\/p>\n\n\n\n With NOWNodes, you can access the following Ethereum RPC endpoints:<\/p>\n\n\n\n The node as a service provider helps to connect to the Ethereum RPC API, so the process of interacting with the Ethereum network becomes effortless, eliminating the need for complicated setup or infrastructure management. <\/p>\n\n\n\n Here is a brief instruction to access an Ethereum RPC node through an RPC API key: <\/p>\n\n\n\n A user-friendly interface and flexible pricing tariffs fit any Web3 development needs. Moreover, NOWNodes provides users with a\u00a0FREE <\/strong>plan. With this plan, you can easily access a full Ethereum RPC node and Ethereum block explorers for free. Moreover, not only Ethereum RPC endpoints may be utilized. With the\u00a0FREE <\/strong>plan, you can access 5 blockchains and benefit from utilizing your private RPC API key for Web3 development.<\/p>\n\n\n\n With an RPC API key, developers can make RPC calls to the Ethereum RPC endpoint and retrieve data or perform actions on the blockchain. Developers can leverage Ethereum RPC methods to build Web3 applications, interact with the network, and retrieve data from the blockchain without the need to run and maintain Ethereum RPC nodes.<\/p>\n\n\n\n The NOWNodes node as a service provider offers high availability and reliability with 99.95% API uptime ensuring less than 1 second API response. The platform provides a variety of services that streamline the operation of an Ethereum RPC node, enabling you to concentrate on your primary goals without being burdened by any complexities. <\/p>\n\n\n\n Additionally, the node as a service provider offers a range of Ethereum JSON-RPC methods that developers can use to interact with the Web3 network. <\/p>\n\n\n\n Alternatively,<\/strong>\u00a0you can run an Ethereum RPC node by yourself. Remember that this way is full of complexities that are connected with multiple business resources spending. Moreover, by running an Ethereum RPC node by yourself you always have to monitor its performance, updates, and security. Explore the NOWNodes\u00a0blog\u00a0and find out how to run an Ethereum node by yourself.<\/p>\n\n\n\n As you\u2019ve discovered how to access Ethereum RPC nodes, it\u2019s time to explore Ethereum JSON-RPC methods.<\/p>\n\n\n Ethereum JSON-RPC provides a wide range of methods that clients can use to interact with the Ethereum endpoints and network all. These Ethereum methods cover various functionalities, including account management, transaction handling, contract deployment, and smart contract execution. <\/p>\n\n\n\n Let\u2019s take a look at some of the commonly used Ethereum JSON-RPC methods, including the types. Notice that all these methods may be utilized with NOWNodes Ethereum RPC endpoints. <\/p>\n\n\n ETH RPC methods that provide information about the blockchain, such as block number, block details, and transaction details. Here are the examples: <\/p>\n\n\n\n eth_blockNumber<\/strong><\/p>\n\n\n\n This ETH JSON-RPC method is used to retrieve the number of the most recent block in the Ethereum blockchain. It does not take any parameters and returns the block number as a hexadecimal string.<\/p>\n\n\n\n eth_getBlockByNumber<\/strong><\/p>\n\n\n\n This method allows you to retrieve information about a specific block by its number. The returned result includes various details of the block, such as the block number, hash, timestamp, transactions, and more.<\/p>\n\n\n\n eth_getTransactionByHash<\/strong><\/p>\n\n\n\n This ETH JSON-RPC method is used to retrieve the details of a specific transaction by its hash. The returned result includes information about the transaction, such as the block number, sender and receiver addresses, gas price, input data, and more.<\/p>\n\n\n ETH RPC methods that interact with Ethereum accounts, such as retrieving account balances, transaction counts, and signing transactions. Here are the RPC request examples: <\/p>\n\n\n\n eth_getBalance<\/strong><\/p>\n\n\n\n The eth_getTransactionCount<\/strong><\/p>\n\n\n\n The ETH RPC method allows you to retrieve the number of transactions sent from a specific Ethereum account. The returned result is the number of transactions sent from the account.<\/p>\n\n\n\n eth_sign<\/strong><\/p>\n\n\n\n The Ethereum methods that handle transactions, such as sending signed transactions, estimating gas costs, and retrieving transaction receipts. Here are some examples of transaction Ethereum JSON-RPC method:<\/p>\n\n\n\n eth_sendRawTransaction<\/strong><\/p>\n\n\n\n The eth_estimateGas<\/strong><\/p>\n\n\n\n This ETH RPC method is used to estimate the amount of gas required for a transaction without actually executing it. The method simulates the execution of the transaction and returns an estimate of the gas required based on the current state of the network. This estimation helps in setting an appropriate gas limit for the transaction to ensure its successful execution.<\/p>\n\n\n\n eth_getTransactionReceipt<\/strong><\/p>\n\n\n\n The ETH RPC methods that interact with smart contracts deployed on the Ethereum blockchain, such as retrieving contract bytecode, querying contract state, and calling contract functions. Here are RPC request examples:<\/p>\n\n\n\n eth_getCode<\/strong><\/p>\n\n\n\n The eth_call<\/strong><\/p>\n\n\n\n The eth_getStorageAt<\/strong><\/p>\n\n\n\n The Ethereum methods that provide information about the Ethereum network, such as protocol version, client version, and network ID. Here are the examples:<\/p>\n\n\n\n net_version<\/strong><\/p>\n\n\n\n The net_peerCount<\/strong><\/p>\n\n\n\n This method allows you to retrieve the number of peers that the client is currently connected to on the Ethereum network. It does not take any parameters and returns the peer count as an integer. The peer count represents the number of other Ethereum nodes that the client is connected to and actively communicating with.<\/p>\n\n\n\n net_listening <\/strong><\/p>\n\n\n\n The These ETH RPC methods interact with the mining functionality of Ethereum, such as starting and stopping mining, setting mining parameters, and retrieving mining status. Here are the examples:<\/p>\n\n\n\n eth_mining<\/strong><\/p>\n\n\n\n The eth_hashrate<\/strong><\/p>\n\n\n\n ETH RPC method that allows you to retrieve the current mining hashrate of the client. It does not take any parameters and returns the hashrate as an integer. The hashrate represents the speed at which the client\u2019s mining hardware is performing hash calculations, typically measured in hashes per second (H\/s) or other units like kilohashes per second (KH\/s) or megahashes per second (MH\/s).<\/p>\n\n\n\n eth_submitWork<\/strong><\/p>\n\n\n\n The These Ethereum methods provide various utility functions, such as converting between different units, generating random numbers, and checking if an address is a contract. Here are the RPC request examples:<\/p>\n\n\n\n eth_getCode<\/strong><\/p>\n\n\n\n The eth_getTransactionReceipt<\/strong><\/p>\n\n\n\n The These were the common Ethereum methods and ETH RPC examples. Each type serves a specific purpose and allows developers to interact with the Ethereum blockchain in different ways. <\/p>\n\n\n\n While working with ETH JSON-RPC in dApp development, you may encounter some common issues. Flow through the NOWNodes blog to explore troubleshooting tips to help you overcome them.<\/p>\n\n\n\n Let\u2019s dive into and learn how to enable Ethereum JSON-RPC methods and utilize Ethereum RPC endpoints.<\/p>\n\n\n Now that you have accessed Ethereum RPC nodes through the node as a service and learned common types of Ethereum JSON-RPC methods and the JSON-RPC examples, it\u2019s time to discover how to utilize Ethereum methods effectively. <\/p>\n\n\n\n Follow these steps to make the most out of the node as a service provider Ethereum RPC endpoints:<\/p>\n\n\n\n For example, utilizing the <\/ol><\/div><\/div><\/div>\n\n\n
Key Features of Ethereum JSON-RPC in DApp Development<\/strong><\/h2>\n\n\n
Accessing Ethereum RPC Node <\/strong><\/h2>\n\n\n
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Exploring Ethereum JSON-RPC Methods<\/strong><\/h2>\n\n\n
Blockchain JSON-RPC<\/strong> Methods<\/strong><\/h3>\n\n\n
Account JSON-RPC<\/strong> Methods<\/strong><\/h3>\n\n\n
eth_getBalance<\/code> method is used to retrieve the balance of a specific Ethereum account. The returned result is the account balance in Wei, the smallest unit of Ether in Ethereum.<\/p>\n\n\n\neth_sign<\/code> method is used to sign a message or a transaction with the private key of an Ethereum account. The returned result is the signature of the message or transaction, which can be used for verification or further processing.<\/p>\n\n\nTransaction JSON-RPC Methods<\/strong><\/h3>\n\n\n
eth_sendRawTransaction<\/code> method is used to send a signed transaction to the Ethereum network for execution. It takes a single parameter: the signed transaction data as a hexadecimal string. The signed transaction includes details such as the recipient address, value to be transferred, gas limit, and more. If the transaction is successfully propagated to the network, the method returns the transaction hash.<\/p>\n\n\n\neth_getTransactionReceipt<\/code> method is used to retrieve the receipt of a specific transaction by its hash. It takes a single parameter: the transaction hash as a hexadecimal string. The transaction receipt includes information about the execution status, block number, gas used, logs generated, and more. If the transaction receipt is not available (e.g., if the transaction is still pending or not found), the method returns null.<\/p>\n\n\nContract JSON-RPC<\/strong> Methods<\/strong><\/h3>\n\n\n
eth_getCode<\/code> method is used to retrieve the bytecode of a smart contract deployed at a specific address on the Ethereum blockchain. The returned result is the bytecode of the contract as a hexadecimal string. <\/p>\n\n\n\neth_call<\/code> method allows you to execute a message call transaction on the Ethereum blockchain without modifying the state. It takes a transaction object as a parameter, which includes details such as the sender address, recipient address, value, and data. The method simulates the execution of the transaction and returns the result or output of the contract function call. <\/p>\n\n\n\neth_getStorageAt<\/code> method is used to retrieve the value stored at a specific storage position of an Ethereum account. The returned result is the value stored at the given storage position as a hexadecimal string. This method is useful for inspecting the internal state of a contract by accessing its storage variables.<\/p>\n\n\nNetwork JSON-RPC Methods<\/strong><\/h3>\n\n\n
net_version<\/code> method is used to retrieve the version number of the Ethereum network that the client is connected to. It does not take any parameters and returns the network version as a string. The network version represents the unique identifier of the Ethereum network, such as \u201c1\u201d for the mainnet, \u201c3\u201d for the Ropsten testnet, and so on.<\/p>\n\n\n\nnet_listening<\/code> method is used to check if the client is currently listening for network connections or not. It does not take any parameters and returns a boolean value. If the client is actively listening for network connections, the method returns true. Otherwise, it returns false.<\/p>\n\n\nMining JSON-RPC Methods<\/strong><\/h3>\n\n\n
eth_mining<\/code> method is used to check if the client is currently mining or not. It does not take any parameters and returns a boolean value. If the client is actively mining, the method returns true. Otherwise, it returns false. Mining refers to the process of contributing computational power to the network to validate and add new blocks to the blockchain.<\/p>\n\n\n\neth_submitWork<\/code> method is used to submit a solution to a mining puzzle (proof-of-work) to the Ethereum network. The method is typically used by mining software or nodes that are actively participating in the mining process to submit their calculated solutions for block validation. If the submitted solution is valid and meets the network\u2019s difficulty requirements, the client may be rewarded with Ether for successfully mining a new block.<\/p>\n\n\nUtility JSON-RPC<\/strong> Methods<\/strong><\/h3>\n\n\n
eth_getCode<\/code> method is used to retrieve the bytecode of a smart contract deployed at a specific address on the Ethereum blockchain. The returned result is the bytecode of the contract as a hexadecimal string. This method is useful for verifying the code of a deployed contract or interacting with contracts at a low level.<\/p>\n\n\n\neth_getTransactionReceipt<\/code> method is used to retrieve the receipt of a specific transaction by its hash. The transaction receipt includes information about the execution status, block number, gas used, logs generated, and more. If the transaction receipt is not available (e.g., if the transaction is still pending or not found), the method returns null. <\/p>\n\n\n\nEnabling NOWNodes Ethereum JSON-RPC methods<\/strong><\/h2>\n\n\n
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eth_syncing<\/code> method would look like:<\/p>\n\n\n\n