> ## Documentation Index
> Fetch the complete documentation index at: https://www.dynamic.xyz/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Adding Custom EVM Networks

> Configure custom EVM networks for the Kotlin SDK at initialization.

You can add any EVM network that Dynamic does not support out of the box by passing a list of `GenericNetwork` objects to the `evmNetworks` property in `ClientProps` when initializing the SDK.

<Warning>
  The `evmNetworks` list replaces the EVM networks enabled in your Dynamic dashboard for this session. Pass the full list of networks you want the SDK to use.
</Warning>

## Example

The following example sets Ethereum Mainnet and Polygon as supported networks. Initialize the SDK from your `Activity` `onCreate`.

```kotlin theme={"system"}
import com.dynamic.sdk.android.DynamicSDK
import com.dynamic.sdk.android.Module.GenericNetwork
import com.dynamic.sdk.android.Module.NativeCurrency
import com.dynamic.sdk.android.core.ClientProps

val evmNetworks = listOf(
    GenericNetwork(
        blockExplorerUrls = listOf("https://etherscan.io"),
        chainId = 1,
        iconUrls = listOf("https://app.dynamic.xyz/assets/networks/eth.svg"),
        name = "Ethereum Mainnet",
        nativeCurrency = NativeCurrency(
            decimals = 18,
            name = "Ether",
            symbol = "ETH"
        ),
        networkId = 1,
        rpcUrls = listOf("https://mainnet.infura.io/v3/YOUR_INFURA_KEY"),
        vanityName = "ETH Mainnet"
    ),
    GenericNetwork(
        blockExplorerUrls = listOf("https://polygonscan.com"),
        chainId = 137,
        iconUrls = listOf("https://app.dynamic.xyz/assets/networks/polygon.svg"),
        name = "Matic Mainnet",
        nativeCurrency = NativeCurrency(
            decimals = 18,
            name = "MATIC",
            symbol = "MATIC"
        ),
        networkId = 137,
        rpcUrls = listOf("https://polygon-rpc.com"),
        vanityName = "Polygon"
    )
)

val props = ClientProps(
    environmentId = "REPLACE_WITH_YOUR_ENV_ID",
    appOrigin = "https://your-app.com",
    evmNetworks = evmNetworks
)

DynamicSDK.initialize(
    props = props,
    context = applicationContext,
    activity = this
)
```

<Note>
  In the `GenericNetwork` constructor, `chainId` and `networkId` accept an `Int`, `Long`, or `String`. `chainName`, `lcdUrl`, `nameService`, `privateCustomerRpcUrls`, and `vanityName` are optional.
</Note>

## Type Reference

### GenericNetwork

| Attribute              | Type              | Required/Optional |
| ---------------------- | ----------------- | ----------------- |
| blockExplorerUrls      | `List<String>`    | Required          |
| chainId                | `Int` or `String` | Required          |
| iconUrls               | `List<String>`    | Required          |
| name                   | `String`          | Required          |
| nativeCurrency         | `NativeCurrency`  | Required          |
| networkId              | `Int` or `String` | Required          |
| privateCustomerRpcUrls | `List<String>?`   | Optional          |
| rpcUrls                | `List<String>`    | Required          |
| vanityName             | `String?`         | Optional          |

### NativeCurrency

| Attribute | Type     | Required/Optional |
| --------- | -------- | ----------------- |
| decimals  | `Int`    | Required          |
| name      | `String` | Required          |
| symbol    | `String` | Required          |

## Next Steps

* [Network Management](/docs/kotlin/wallets/general/network-management) - Switch networks and read the current network
* [Send ETH](/docs/kotlin/wallets/evm/send-eth) - Send transactions on EVM networks