Detecting the Specific Wallet Provider Used in a Web3 DApp

With the growing adoption of decentralized applications (dApps) on blockchain platforms, it has become increasingly important to track and manage user wallet connections. One common problem is to detect which specific wallet provider was used to connect to a specific dApp. In this article, we will explore how to implement a solution using Web3 libraries in JavaScript.

Current Approach

Your current approach involves checking for the presence of ethereum and web3 in your codebase, but it does not provide any information about which wallet provider was used to connect to the dApp. This is because both libraries may have multiple wallet providers installed on the user’s machine.

Solution Overview

To solve this problem, we will use Web3.js’ ability to detect and parse wallet providers from an Ethereum wallet provider. We will also create a custom function that checks for specific wallet providers and returns their names as an array.

Implementation

const ethereum = window.ethereum;
const web3 = window.web3;
// Function to find wallet providers and return them as an array
function getWalletProviders() {
const provider = ethereum.currentProvider;
const wallets = [];
if (provider && provider.getAccounts()) {
for (const account of provider.getAccounts()) {
const walletName = web3.eth.accounts.fromRawHash(account.rawHash);
wallets.push(walletname);
}
}
return wallets;
}
// Function to detect a specific wallet provider
function detectWalletProvider(providers, walletName) {
const matchingProviders = providers.filter(provider => provider.name === walletName);
if (matchingProviders.length > 0) {
return matchingProviders[0].name; // Returns the name of the matching provider
} else {
return null;
}
}
// Example usage:
const wallets = getWalletProviders();
console.log(wallets); // Output: ['...']
const ethereumProvider = ethereum.currentProvider;
const web3Provider = window.web3.currentProvider;
const walletName = detectWalletProvider(wallets, '0x...')); // Replace with the actual wallet name
if (wallet name !== null) {
console.log(Connected to ${walletName} using Ethereum);
} else {
console.log('No matching provider found');
}

Explanation

In this implementation:

• The getWalletProviders() function uses ethereum.currentProvider and checks if it is available by checking for the presence of wallet providers.

• It then iterates over all accounts on the Ethereum network using the web3.eth.accounts.fromRawHash() method, which converts the raw hash values ​​of the accounts to their corresponding names.

• The detectWalletProvider() function takes as input an array of provider objects and a specific wallet name. It filters the list based on whether the given name matches any of the providers in the list. If a match is found, it returns the name of the matching provider; otherwise, it returns “null”.

• In the usage example section, we will show how to call the detectWalletProvider() function with a specific wallet name obtained from getWalletProviders(). We will then log the result to the console.

Conclusion

By implementing this custom solution using Web3.js and a combination of wallet provider detection functions, you can effectively track which wallet provider was used to connect to a particular dApp. This approach allows you to manage multiple wallet providers on your users’ devices while providing a seamless user experience.

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