Metamask: I am not able to change my Metamask account due to 3 lines of code in the below App.js code from line 25-27

Metamask Account Change Problem: A Look at the Code

As a developer, you’ve probably run into issues with changing your MetaMask account. The problem lies in a specific line of code within the App.js file on Ethers.js. In this article, we’ll dive into what’s wrong and provide guidance on how to fix it.

Problem: 3 lines of code

const realEstate = new ethers.Contract(config[network[networkType]]));

Problem:

The problem is in the line that specifies network. Specifically, lines 25-27 seem to be causing the problems:

const network = config[network];
const networkType = config[network].network;
// or
const realEstate = new ethers.Contract(config[network]);

In this code snippet, config appears as an object with a nested structure. When trying to access the network field in config, Ethers.js throws an error because it is not sure which networkType corresponds to the current network type.

Decision:

To solve this problem, you need to make sure that the correct networkType is used to create the MetaMask contract. You can do this by adding additional logic or by using environment variables to specify the network type.

Here are some possible solutions:

• Use an object with multiple types of networks:

const config = {

  development: {

    network: 'rinkeby',

    networkType: 'mainnet'

  },

  test: {

    network: 'ropsten',

    networkType: 'testnet'

  }

};


// or
config.networkTypes = {
development: ['mainnet', 'testnet'],
test: ['ropsten']
};

Then use the correct network type when creating your MetaMask contract:

const realEstate = new ethers.Contract(config.networkTypes[config.network]);

• Use environment variables:

You can store network types and their corresponding contracts in environment variables. Then load these variables into your code using process.env. Here’s an example:

const { networkType } = process.env;
const config = {
// ...
};
// or
config.networkTypes = process.env.NETWORK_TYPES || {};

In this case you can use the following line of code:

const realEstate = new ethers.Contract(config[networkType]);

• Use the configuration file:

You can store your network types and their corresponding contracts in a separate configuration file (eg metamask-configuration.json). Then load this file into your code using config.fromJSON().

In this case:

const config = require('./metamask-configuration.json');

// or


config.networkTypes = config.networkTypes || {};

Conclusion:

The problem with 3 lines of code is likely due to a misconfigured network type. By adding additional logic, using environment variables, or uploading your configuration file, you should be able to resolve this issue and successfully switch your MetaMask account.

Remember to always refer to the Ethers.js documentation for more information on how to work with contracts, networks, and configurations.

Ethereum Developers Behind Ripple