Determining the Wallet Provider Used by a Specific Web3 DApp
With the increasing adoption of decentralized applications (dApps) on blockchain platforms, it is becoming increasingly important to track and manage user wallet connections. One of the most common challenges is determining 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 « ethereum » and « web3 » in the codebase, but it does not provide any information about which wallet provider was used to connect to the dApp. This is because both libraries can have multiple wallet providers installed on the user’s computer.
Solution Overview
To solve this problem, we will use Web3.js’ ability to detect and parse wallet providers from Ethereum wallet providers. We will also create a custom function that checks for specific wallet providers and returns their names as an array.
Implementation
const ethereum = windows.ethereum;
const web3 = window.web3;
// Function to determine 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 determine 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');
}
Reasoning
In this implementation:
- The “getWalletProviders()” function takes the “ethereum.currentProvider” and checks if it is available by checking for the presence of the wallet provider.
- It then iterates over all accounts on the Ethereum network using the « web3.eth.accounts.fromRawHash() » method, which converts the raw hashes of the accounts into their corresponding names.
- The « detectWalletProvider() » function takes an array of provider objects and the name of a specific wallet as input. This filters the list based on whether the specified name matches any of the specified providers. If a match is found, the name of the corresponding provider is returned; otherwise, it returns « null ».
- In the usage example section, we demonstrate how to call the
detectWalletProvider()' function with a specific wallet name obtained fromgetWalletProviders()`. We then log the result to the console.
Conclusion
By implementing this custom solution using a combination of Web3.js and wallet provider discovery features, you can efficiently track which wallet provider is used to connect to a specific dApp. This approach allows you to manage multiple wallet providers on your users’ devices while ensuring a seamless user experience.
