> For the complete documentation index, see [llms.txt](https://docs.bunzz.dev/product-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bunzz.dev/product-docs/introduction/metamask.md).

# MetaMask

MetaMask is a software cryptocurrency wallet used to interact with the Ethereum blockchain. It allows users to access their Ethereum wallet through a browser extension or mobile app, which can then be used to interact with decentralized applications. [Wikipedia](https://en.wikipedia.org/wiki/MetaMask)

MetaMask is the main point of communication between Bunzz and your Ethereum wallet. The main purposes are we do not gain access to your personal data. Each action that requires the participation of your Ethereum wallet will be accompanied by a dialog box with your confirmation.

### Download

The best and simplest option will be to download from <https://metamask.io/>

### Test networks

During the development and testing of your own Dapp, you can use test networks. (e.g. ROPSTEN, KOVAN and RINKEBY)

#### How to switch to test network?

1. Go to the **Settings**

![](/files/1BtTUQC63Y2z5PJx5cIx)

2\. Choose **Advanced** option

![](/files/80rm9hHba9qlvopaPqVd)

3\. Then turn on **Show test networks**

![](/files/r7d8aseXUYHJCXbIJwlE)

🎉 Now you can access the test networks in the list of networks

![](/files/bbPkXG5FEVq7LJLleb1p)

#### Add Mumbai Polygon

To add the Mumbai Polygon test network, you can use <https://chainlist.org/>

1. Choose [Polygon Testnet Mumbai](https://polygon.technology/)\
   ![](/files/DRVSc1pV2eCaa6HGRz9r)<br>
2. Press **Connect Wallet**\
   ![](/files/YXrYO7NnXkcoRMrh9sSZ)<br>
3. Press **Add to MetaMask**\
   ![](/files/V1BJipsOsgUiGCCWl74F)

🎉 Now you can easily get official faucet from <https://faucet.polygon.technology/>&#x20;

### How to get test tokens

To take advantage of blockchain and smart contracts, you will needs gas.&#x20;

For receive test tokens, you need to know your wallet's public key.  You can get it from MetaMask.

Just click to copy\
![](/files/WRYFcZ3Yy9jG4VKuffOK)

#### Services for receiving test tokens

* Ropsten: <https://faucet.metamask.io/>
* Kovan: <https://gitter.im/kovan-testnet/faucet> or <https://ethdrop.dev/>
* Rinkeby: <https://faucet.rinkeby.io/>
* Goerli: <https://faucet.goerli.mudit.blog/>
* Mumbai: <https://faucet.polygon.technology/>&#x20;

For any questions or feedback you may have, please feel free to contact us on [Bunzz Discord Server](https://discord.gg/XPh4QHuKYE).