Metamask: Trying to get eth balance on metamask still gives the error “MetaMask – RPC Error: Missing value for required argument 1”.

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MetaMask: Keep getting “RPC Error: missing value for required argument 1” error when trying to get Eth balance in MetaMask

As a Metamask user, you are probably familiar with the frustration that comes when trying to interact with your wallet. One such error that plagues many users is the “RPC Error: missing value for required argument 1” issue when using the “eth_getBalance” method.

In this article, we’ll get to the bottom of what causes this error and provide a solution to fix it in your Metamask setup.

What causes the RPC error?

The “RPC Error: missing value for required argument 1” error usually occurs when you try to call a function that requires an argument (in this case, “eth_getBalance”) but don’t pass the correct value. This can happen if you use a library like MetaMask that interacts with the Ethereum network.

In your code, it looks like you have a basic setup to connect to your Metamask wallet and get its balance:

let accounts;
let balance;
const connectWallet = async() => {
try {
// Initialize Metamask wallet
await initMetamaskWallet();
// Get account balances using eth_getBalance function
const accounts = await getAccounts();
const balance = await checkEthBalance();
console.log(Account balance: ${balance});
} catch (error) {
console.error(error);
} }
} }

However, when you call eth_getBalance, an argument in the form of a JSON-RPC method ID is required. Unfortunately, Metamask doesn’t seem to pass this argument correctly.

Solution

To fix the error, you need to make sure that your checkEthBalance function is compatible with the expected format of MetaMask’s RPC requests. Since eth_getBalance requires an argument in the form of a JSON-RPC method ID starting with 'eth/', you can modify your checkEthBalance function as follows:

const checkEthBalance = async() => {
try {
// Get account balances using the eth_getBalance function
const accounts = await getAccounts();
const balance = await checkRpcCalls([
{ method : ' eth_getBalance ' , params : [ ' 0x ... ' ] } , // Replace with your actual account address
]);
console.log(Account balance: ${balance});
} catch (error) {
console.error(error);
} }
} }

In this modified version, we pass a JSON RPC call object with the method ID “eth_getBalance” as the first argument. This should get your “checkEthBalance” function to get the correct response.

Additional Tips

• Make sure you have initialized your Metamask wallet correctly before attempting to retrieve balances.

• Make sure your “initMetamaskWallet()” function is called before attempting to connect to the wallet.

• If you are using a library such as MetaMask, refer to its documentation for specific instructions on calling Ethereum functions with RPC requests.

By following these steps and modifying your checkEthBalance function, you should be able to resolve the “RPC Error: missing value for required argument 1” issue in your Metamask setup.