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How to Configure Standalone TON Connect Mode in the Omniston Widget

Configure Omniston standalone mode with your app’s public TON Connect manifest, then load and mount the widget. Learn when to use integrated mode instead.

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To configure standalone TON Connect in Omniston, set tonconnect.type to "standalone", provide your app’s public manifest URL as tonconnect.options.manifestUrl, then mount the widget after its container exists. The widget initializes TON Connect internally, so you do not need to create a separate TON Connect instance for this widget flow.

What you need before setup

  • A publicly reachable TON Connect manifest that you create and host. The Omniston guide says its URL must be on the same domain as your application; it warns that wallets reject connections when the domains do not match.
  • A page element where the widget will appear, such as <div id="omniston-widget-container"></div>.
  • A way to load the widget: use the CDN script for a static page, or the npm loader for a bundled application.

The STON.fi quick-start sample manifest contains url, name, and iconUrl fields and says to customize them for your application. That sample is not a substitute for checking the TON Connect manifest specification.

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Choose how to load the widget

Static page: load from the CDN

Include https://widget.ston.fi/v0/index.js on the page. The script exposes the constructor as window.OmnistonWidget. The CDN path is major-versioned; STON.fi says non-breaking updates are delivered within a major version and breaking changes require adopting a new major path.

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Bundled application: use the npm loader

Install @ston-fi/omniston-widget-loader, call its load() method, and instantiate the constructor it returns. The package loads the CDN-hosted widget bundle; it is a loader, not a fixed local copy of the widget.

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Both approaches expose the same widget constructor. Choose based on how your app loads scripts and when it needs the widget.

Configure standalone mode and mount

Once the widget constructor is available and the target container has been added to the DOM, pass the manifest URL in the standalone options and mount the instance:

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const widget = new window.OmnistonWidget({
  tonconnect: {
    type: "standalone",
    options: {
      manifestUrl: "https://your-app.example/tonconnect-manifest.json",
    },
  },
});

widget.mount(document.querySelector("#omniston-widget-container"));

Replace the example URL with the public URL for your own manifest. The required standalone option is manifestUrl; other widget configuration is optional. Make sure the selector resolves to an element before calling mount().

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Standalone or integrated: which connection mode fits?

Mode Use it when Connection behavior
standalone Your page needs the widget’s swap flow and does not already manage a TON Connect instance. The widget initializes TON Connect using the manifest URL.
integrated Your app already has an initialized TON Connect SDK instance and the widget should share its connection, wallet choice, or account. Pass the existing instance with tonconnect: { type: "integrated", instance: tonconnect }.

The Omniston guide warns that TON Connect permits only one SDK instance per application and that creating multiple instances can crash the app. If your application already initializes TON Connect, reuse that instance in integrated mode instead of adding a standalone instance for the widget.

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Optional settings after the basic flow works

Preselect or limit assets

defaultBidAsset and defaultAskAsset can preselect assets. The defaultAssets setting controls whether the built-in asset list is shown. If you set it to false, provide a non-empty customAssets list or the selector will have no tradable assets.

Set a referral fee

The widget supports optional referral-fee configuration using both a receiving referrerAddress and referrerFeeBps. The documented range is 1–100 basis points (0.01%–1%). This is a widget setting; it does not establish a separate affiliate program.

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Style and clean up the widget

Override CSS custom properties on the widget container to adjust its styling. For pages that dynamically open or close the widget, use its lifecycle events for mount, unmount, and error handling, and call unmount() when removing it.

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Versioning and maintenance

STON.fi documents CDN paths such as /v0/ and /v1/ as major-versioned: non-breaking updates stay within a major version, while integrators should change the path when adopting breaking changes. The project repository describes CDN distribution as intentional so integrators receive fixes and updates while major paths preserve compatibility. Check the current official guide and the major path your application deploys before upgrading, since bundle and configuration details can change.

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