Adding Custom EVM Networks - Dynamic

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.

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.

Example

The following example sets Ethereum Mainnet and Polygon as supported networks.

import 'package:dynamic_sdk/dynamic_sdk.dart';

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

DynamicSDK.init(
  props: ClientProps(
    environmentId: 'REPLACE_WITH_YOUR_ENV_ID',
    appOrigin: 'https://your-app.com',
    evmNetworks: evmNetworks,
  ),
);

In the GenericNetwork constructor, chainId and networkId accept either an int or a String. decimals is a double in the Flutter SDK, but you can pass an integer literal such as 18. chainName, lcdUrl, nameService, privateCustomerRpcUrls, and vanityName are optional.

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	`double`	Required
denom	`String?`	Optional
name	`String`	Required
symbol	`String`	Required

Next Steps

Network Management - Switch networks and read the current network
Send ETH - Send transactions on EVM networks

Last modified on August 13, 2026

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