In the world of decentralized applications (DApps), efficiently fetching Ethereum data is crucial. Ether-SWR is a powerful React hook that simplifies this process by managing your internal state and optimizing RPC calls to an Ethereum node. This blog will guide you through the installation, usage, and troubleshooting of Ether-SWR.

Understanding Ether-SWR: An Analogy

Imagine you are a chef in a busy restaurant, and you need to serve dishes (data) to your customers (your DApp users). Instead of cooking every dish from scratch whenever an order comes in, you prepare a few dishes in advance and keep them on standby (cache). When a new order arrives, you first serve the prepared dish (stale data) while you cook the fresh one (fetch new data). Once it’s ready, you bring it to the table, ensuring your patrons always get their meal promptly.

This is essentially what Ether-SWR achieves through its ‘stale-while-revalidate’ strategy, keeping your data delivery prompt and efficient!

Installation

Getting started with Ether-SWR is straightforward. You can install it via yarn or npm:

• yarn add ether-swr
• npm install --save ether-swr

API Usage

Ether-SWR allows you to easily interact with Ethereum methods, smart contracts, and even manage multiple requests all at once. Below are some examples to illustrate its power.

1. Interact with Ethereum Methods

You can use Ether-SWR to fetch the balance of an address:

const  data: balance  = useEtherSWR([getBalance, latest])

2. Interacting with a Smart Contract

To fetch the balance of a specific token from a smart contract:

const  data: balance  = useEtherSWR([0x6b175474e89094c44da98b954eedeac495271d0f, DAI contract  balanceOf,  Method,  0x5d3a536e4d6dbd6114cc1ead35777bab948e3643  holder])

3. Making Multiple Requests at Once

Ethereum allows you to request multiple token balances simultaneously:

const data: balances = useEtherSWR([[0x6b175474e89094c44da98b954eedeac495271d0f, DAI contract balanceOf, Method 0x5d3a536e4d6dbd6114cc1ead35777bab948e3643 holder 1], [0x6b175474e89094c44da98b954eedeac495271d0f, DAI contract balanceOf, Method 0x5d3a536e4d6dbd6114cc1ead35777bab948e3643 holder 2]])

4. Subscribing to Events

To stay updated on certain events (like transfers), you can subscribe to topics:

const  data: balance, mutate  = useEtherSWR([address, balanceOf, account], {
    subscribe: [{ name: "Transfer", topics: [null, account] }, {name: "Transfer", topics: [account, null]}]
})

Getting Started with the Global Fetcher

You can configure a global fetcher with EthSWRConfig, which can retrieve Ethereum information efficiently. This also allows you to set an automatic refresh interval.

const EthSWRConfig = () => {
    
        
        
    
}

Troubleshooting

If you encounter issues while using Ether-SWR, here are some troubleshooting tips:

• Ensure that your Ethereum connection is established properly. Check the Web3 provider you’re using.
• Review the contract’s ABI used in your requests. A mismatch can lead to errors.
• Check for network issues or downed nodes that might affect data retrieval.

For more insights, updates, or to collaborate on AI development projects, stay connected with fxis.ai.

Conclusion

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.