Deploying a Bridge UI for your HWR

After you’ve successfully deployed a Hyperlane Warp Route (HWR), you have two out-of-the-box options for setting up a frontend UI to support interchain token transfers:

1. Fork, customize, and deploy the Hyperlane Warp UI template
2. Use a managed Superbridge instance

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1. Hyperlane Warp UI Template

The Hyperlane Warp UI template is a prebuilt Next.JS app you can easily customize and deploy.

• Configuration: Follow the configuration instructions for details on how to configure the Warp UI Web application and run it locally.
• Customization: Follow the customization instructions for details on how to configure the UI’s tokens and change the default branding assets/theme.

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Registry

By default, the app will use the canonical Hyperlane registry published on NPM. To use a different registry, you can set a URL using the NEXT_PUBLIC_REGISTRY_URL environment variable.

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HWR Config Example

Here’s an example config for a HWR that connects USDC on Sepolia to Alfajores. You can use Typescript or YAML for your route configs.

{
  tokens: [
    {
      // The ChainName of the token
      chainName: "sepolia",
      // See https://github.com/hyperlane-xyz/hyperlane-monorepo/blob/main/typescript/sdk/src/token/TokenStandard.ts
      standard: TokenStandard.EvmHypCollateral,
      // The token metadata (decimals, symbol, name)
      decimals: 6,
      symbol: "USDC",
      name: "USD Coin",
      // The router address
      addressOrDenom: "YOUR_ROUTER_ADDRESS_1",
      // The address of the underlying collateral token
      collateralAddress: "0x1c7D4B196Cb0C7B01d743Fbc6116a902379C7238",
      // A path to a token logo image
      logoURI: "/logos/usdc.png",
      // The list of tokens this one is connected to
      connections: [{ token: "ethereum|alfajores|YOUR_ROUTER_ADDRESS_2" }],
    },
    {
      chainName: "alfajores",
      standard: TokenStandard.EvmHypSynthetic,
      decimals: 6,
      symbol: "USDC",
      name: "USD Coin",
      addressOrDenom: "YOUR_ROUTER_ADDRESS_2",
      logoURI: "/logos/usdc.png",
      connections: [{ token: "ethereum|alfajores|YOUR_ROUTER_ADDRESS_2" }],
    },
  ];
}

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Chain Config Example

Chain metadata can also be configured as needed. These are the same configs as those used with the CLI for any of its deploy or send command (for example, those from the deploy guide).

{
anvil1: {
    chainId: 31337,
    name: 'anvil1',
    displayName: 'Anvil 1 Local',
    nativeToken: { name: 'Ether', symbol: 'ETH', decimals: 18 },
    publicRpcUrls: [{ http: 'http://127.0.0.1:8545' }],
    blocks: {
      confirmations: 1,
      reorgPeriod: 0,
      estimateBlockTime: 10,
    },
    logoURI: '/logo.svg'
  }
}

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Deploy the UI

Since the UI is a Next.js app, you can use your favorite hosting service to host it. We recommend Vercel, which works well with Next. AWS Amplify is another popular option.

1. Sign up for Vercel
2. Create a new project and connect it to your GitHub repo
3. Hit Deploy!

And that’s it! Now you and your users can use the UI to send tokens from the collateral chain to remote chains, from one remote chain to another, and from any remote chain back to the collateral chain.

hyperlane relayer --symbol TOKEN

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Return gas

A common problem with token bridges like HWRs is that a user may transfer a token like USDC to a new chain, but only afterwards realize that they do not have the native gas token to move those tokens anywhere including back.

To improve the user experience, you could provide some native gas tokens via a faucet, in addition to UI warnings. To create a faucet, modify the HWR contracts to hold a balance of the native token to share with recipients.

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2. Superbridge

Superbridge is a custom bridge provider, they manage bridge frontends for hundreds of rollups, various tokens and different ecosystems.

Getting a managed Superbridge for your HWR is a hassle-free approach to operating your bridge. A few of their most popular Hyperlane powered bridges are Renzo’s ezETH bridge and Elixir’s deUSD bridge. With a managed bridge instance, Superbridge will handle hosting, theming, upgrades & user support requests for your HWR.

They’ve also built a handy feature that allows for self-service testing of recently deployed HWRs.

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Testing your HWR

1. Navigate to the Superbridge Hyperlane Playground
2. Click the settings cog and then click Customize
3. Paste in the YAML file you generated when deploying your HWRs
4. The specified tokens and networks will now be available for bridging.

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Bridging Widget

In addition to the hosted UI, Superbridge offers a bridging widget, so you can embed your bridge in your own site. Checkout their Widget Demos site for an overview of all the configuration options available.

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Go to Production

To bring your HWR to production with Superbridge, reach out to the Superbridge team. They can typically get a frontend up and running in about a day.