> For the complete documentation index, see [llms.txt](https://docswallet.udrox.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docswallet.udrox.com/reference/default-networks.md).

# Default Networks

Using only the key we can access the default networks for most of the functions within the udrox wallet api

Udrox Wallet is a decentralized wallet therefore it requires the use of the GAS rate for each transaction, all transactional movement is registered within the established blockchain

<table data-full-width="true"><thead><tr><th width="163.5">Key</th><th>Description</th></tr></thead><tbody><tr><td>UDROX</td><td>Udrox Mintme mainnet<br>chainID 24734<br>The default GAS cost of this network is extra cheap</td></tr><tr><td>MINTME</td><td>MintMe Coin mainnet<br>chainID 24734<br>The default GAS cost of this network is very cheap</td></tr><tr><td>CRO</td><td>Cronos mainnet<br>chainID 25<br>The default GAS cost of this network is cheap</td></tr><tr><td>MATIC</td><td>Polygon Mainnet<br>chainID 137<br>The default GAS cost of this network is economic means</td></tr><tr><td>BNB</td><td>Binance Smart Chain (BSC)<br>chainID 56<br>The default GAS cost of this network is regular cost</td></tr><tr><td>ETH</td><td>Ethereum Mainnet<br>chainID 1<br>This network is characterized by high transaction costs (GAS)</td></tr></tbody></table>

Implementation example, where the third parameter is the default key

{% code overflow="wrap" %}

```javascript
walletudrox.acceptNets = ["UDROX","MINTME","CRO"];
walletudrox.preferNet = "UDROX";
```

{% endcode %}

To use a custom network or one that does not exist in this list, in the documentation we provide the necessary information to use our own network

{% hint style="info" %}
At the moment we are increasing the default networks constantly, if you do not find your network in this list you can use a custom chain in the documentation you can see how to implement it in the udrox wallet api
{% endhint %}