# Initialize Mediation ## Add the Import Header Add the following import header to the top of any class file that will be using a Mediation class:

```
import ChartboostMediationSDK
```

#import <ChartboostMediationSDK/ChartboostMediationSDK-Swift.h>

## Initialize Mediation Using the Mediation `AppId` from your Helium Dashboard setup, initialize the Mediation SDK with the following code:

Helium.shared().start(withAppId: "MYMEDIATIONAPPID", options: options, delegate: self)

[[Helium sharedHelium] startWithAppId:@"MYHELIUMAPPID" options:options delegate:self];

Make sure that the Mediation `AppId` value is obtain directly from your Mediation Dashboard for your app as opposed to credentials from Chartboost or any other Ad Network. You can implement the `HeliumSdkDelegate` in your class to receive notifications about the success or failure of the SDK initialization. See [Delegate Usage](/en/mediation/integrate/ios/delegate-usage/) for more details. Once the Mediation SDK has successfully started, you can start showing ads. ## Advanced Settings ### Initialization Metrics The Mediation SDK contains an optional callback for receiving SDK initialization metrics in a JSON format. To utilize the API, use the following code snippets. Subscribing is highly recommended once initialization has succeeded.

// Subscribing to Mediation SDK initialization results.
NotificationCenter.default.addObserver(forName: .heliumDidReceiveInitResults, object: nil, queue: nil) { notification in
  // Extract the results JSON payload.
  let results = notification.object as? [String: Any]
}

// Subscribing to Mediation SDK initialization results.
[NSNotificationCenter.defaultCenter addObserverForName:kHeliumDidReceiveInitResultsNotification
                                                object:nil
                                                 queue:nil
                                             usingBlock:^(NSNotification * _Nonnull notification) {
    // Extract the results payload.
    NSDictionary *results = (NSDictionary *)notification.object;
}];

### Network Kill Switch The Mediation SDK initialization method has been expanded to take in optional initialization parameters. One of those parameters is a set of network adapter identifiers to skip initialization for the session.

// Create Mediation SDK options to disable specific networks
let options = HeliumInitializationOptions(skippedPartnerIdentifiers: ["network_identifier", "network_identifier2"])
let helium = Helium.shared()
helium.start(withAppId: "appIdentifier", andAppSignature: "appSignature", options: options, delegate: self)

HeliumInitializationOptions *options = [[HeliumInitializationOptions alloc] initWithSkippedPartnerIdentifiers:@[ @"network_identifier", @"network_identifier2" ]];
[[Helium sharedHelium] startWithAppId:@"appIdentifier" andAppSignature:@"appSignature" options:options delegate:self];

#### Network Adapter Identifiers | Network | Identifier | | ------------------------- | -------------------- | | AdMob | admob | | Amazon Publisher Services | amazon_aps | | AppLovin | applovin | | BidMachine | bidmachine | | Meta Audience Network | facebook | | Digital Turbine Exchange | fyber | | Google Bidding | google_googlebidding | | InMobi | inmobi | | IronSource | ironsource | | Mintegral | mintegral | | Pangle | pangle | | Unity | unity | | Vungle | vungle | | MobileFuse | mobilefuse | | Verve | verve | | HyprMX | hyprmx |