` | | `import HeliumSdk` | `import ChartboostMediationSDK` | ### Load Request Identifier The load request identifier has been moved from being a return value from loads to a parameter in the load completion delegate callback. #### Banner Heliuim 3.x

if let banner = Helium.shared().bannerProvider(with: self, andPlacementName: "your placement", andSize: .standard) {
    let requestIdentifier = banner.load(with: self)
    // Handle `requestIdentifier`
}

HeliumBannerView *banner = [[Helium sharedHelium] bannerProviderWithDelegate:self andPlacementName:@"your placement" andSize:CHBHBannerSize_Standard];
if (banner != nil) {
        NSString *requestIdentifier = [banner loadAdWithViewController:self];
        // Handle `requestIdentifier`
}

Mediation 4.x

func heliumBannerAd(placementName: String, requestIdentifier: String, winningBidInfo: [String : Any]?, didLoadWithError error: ChartboostMediationError?) {
    // Handle `requestIdentifier`
}

- (void)heliumBannerAdWithPlacementName:(NSString * _Nonnull)placementName requestIdentifier:(NSString * _Nonnull)requestIdentifier winningBidInfo:(NSDictionary<NSString *,id> * _Nullable)winningBidInfo didLoadWithError:(ChartboostMediationError * _Nullable)error {
    // Handle `requestIdentifier`
}

#### Interstitial Helium 3.x

if let interstitial = Helium.shared().interstitialAdProvider(with: self, andPlacementName: "your placement") {
    let requestIdentifier = interstitial.load()
    // Handle `requestIdentifier`
}

id<HeliumInterstitialAd> interstitial = [[Helium sharedHelium] interstitialAdProviderWithDelegate:self andPlacementName:@"your placement"];
if (interstitial != nil) {
    NSString *requestIdentifier = [interstitial loadAd];
    // Handle `requestIdentifier`
}

Mediation 4.x

func heliumInterstitialAd(withPlacementName placementName: String, requestIdentifier: String, winningBidInfo: [String : Any]?, didLoadWithError error: ChartboostMediationError?) {
    // Handle `requestIdentifier`
}

- (void)heliumInterstitialAdWithPlacementName:(NSString * _Nonnull)placementName requestIdentifier:(NSString * _Nonnull)requestIdentifier winningBidInfo:(NSDictionary<NSString *,id> * _Nullable)winningBidInfo didLoadWithError:(ChartboostMediationError * _Nullable)error {
    // Handle `requestIdentifier`
}

#### Rewarded Helium 3.x

if let rewarded = Helium.shared().rewardedAdProvider(with: self, andPlacementName: "your placement") {
    let requestIdentifier = rewarded.load()
    // Handle `requestIdentifier`
}

id<HeliumRewardedAd> rewarded = [[Helium sharedHelium] rewardedAdProviderWithDelegate:self andPlacementName:@"your placement"];
if (rewarded != nil) {
    NSString *requestIdentifier = [rewarded loadAd];
    // Handle `requestIdentifier`
}

Mediation 4.x

func heliumRewardedAd(withPlacementName placementName: String, requestIdentifier: String, winningBidInfo: [String : Any]?, didLoadWithError error: ChartboostMediationError?) {
    // Handle `requestIdentifier`
}

- (void)heliumRewardedAdWithPlacementName:(NSString * _Nonnull)placementName requestIdentifier:(NSString * _Nonnull)requestIdentifier winningBidInfo:(NSDictionary<NSString *,id> * _Nullable)winningBidInfo didLoadWithError:(ChartboostMediationError * _Nullable)error {
    // Handle `requestIdentifier`
}

### Clear Loaded Ad The return value for `clearLoadedAd()` has been removed, and it is assumed to succeed. #### Banner Helium 3.x

```
let success = banner.clear()
```
```
BOOL success = [banner clearAd];
```

Mediation 4.x

// The result of `clear` is assumed to succeed.
banner.clear()

// The result of `clearAd` is assumed to succeed.
[banner clearAd];

#### Interstitial Helium 3.x

let success = interstitial.clearLoadedAd()

BOOL success = [interstitial clearLoadedAd];

Mediation 4.x

// The result of `clearLoadedAd` is assumed to succeed.
interstitial.clearLoadedAd()

// The result of `clearLoadedAd` is assumed to succeed.
[interstitial clearLoadedAd];

#### Rewarded Helium 3.x

```
let success = rewarded.clearLoadedAd()
```

BOOL success = [rewarded clearLoadedAd];

Mediation 4.x

// The result of `clearLoadedAd` is assumed to succeed.
rewarded.clearLoadedAd()

// The result of `clearLoadedAd` is assumed to succeed.
[rewarded clearLoadedAd];

### Merge Winning Bid Information with Load Completion The optional winning bid delegates have been merged into the load completion delegate callbacks. #### Banner Helium 3.x

func heliumBannerAd(placementName: String, didLoadWinningBidWithInfo bidInfo: [String : Any]) {
    // Handle `bidInfo`
}

- (void)heliumBannerAdWithPlacementName:(NSString *)placementName didLoadWinningBidWithInfo:(NSDictionary<NSString *,id> *)bidInfo {
    // Handle `bidInfo`
}

Mediation 4.x

func heliumBannerAd(placementName: String, requestIdentifier: String, winningBidInfo: [String : Any]?, didLoadWithError error: ChartboostMediationError?) {
    // Handle `winningBidInfo`
}

- (void)heliumBannerAdWithPlacementName:(NSString * _Nonnull)placementName requestIdentifier:(NSString * _Nonnull)requestIdentifier winningBidInfo:(NSDictionary<NSString *,id> * _Nullable)winningBidInfo didLoadWithError:(ChartboostMediationError * _Nullable)error {
    // Handle `winningBidInfo`
}

#### Interstitial Helium 3.x

func heliumInterstitialAd(withPlacementName placementName: String, didLoadWinningBidWithInfo bidInfo: [String : Any]) {
    // Handle `bidInfo`
}

- (void)heliumInterstitialAdWithPlacementName:(NSString *)placementName didLoadWinningBidWithInfo:(NSDictionary<NSString *,id> *)bidInfo {
    // Handle `bidInfo`
}

Mediation 4.x

func heliumInterstitialAd(withPlacementName placementName: String, requestIdentifier: String, winningBidInfo: [String : Any]?, didLoadWithError error: ChartboostMediationError?) {
    // Handle `winningBidInfo`
}

- (void)heliumInterstitialAdWithPlacementName:(NSString * _Nonnull)placementName requestIdentifier:(NSString * _Nonnull)requestIdentifier winningBidInfo:(NSDictionary<NSString *,id> * _Nullable)winningBidInfo didLoadWithError:(ChartboostMediationError * _Nullable)error {
    // Handle `winningBidInfo`
}

#### Rewarded Helium 3.x

func heliumRewardedAd(withPlacementName placementName: String, didLoadWinningBidWithInfo bidInfo: [String : Any]) {
    // Handle `bidInfo`
}

- (void)heliumRewardedAdWithPlacementName:(NSString *)placementName didLoadWinningBidWithInfo:(NSDictionary<NSString *,id> *)bidInfo {
    // Handle `bidInfo`
}

Mediation 4.x

func heliumRewardedAd(withPlacementName placementName: String, requestIdentifier: String, winningBidInfo: [String : Any]?, didLoadWithError error: ChartboostMediationError?) {
    // Handle `winningBidInfo`
}

- (void)heliumRewardedAdWithPlacementName:(NSString * _Nonnull)placementName requestIdentifier:(NSString * _Nonnull)requestIdentifier winningBidInfo:(NSDictionary<NSString *,id> * _Nullable)winningBidInfo didLoadWithError:(ChartboostMediationError * _Nullable)error {
    // Handle `winningBidInfo`
}

### New Rewarded Callback The integer value from the old reward callback has been removed since it never provided useful information. #### Rewarded Helium 3.x

func heliumRewardedAd(withPlacementName placementName: String, didGetReward reward: Int) {
    // Old reward was an integer and never provided useful information
}

- (void)heliumRewardedAdWithPlacementName:(NSString *)placementName didGetReward:(NSInteger)reward {
    // Old reward was an integer and never provided useful information
}

Mediation 4.x

func heliumRewardedAdDidGetReward(withPlacementName placementName: String) {
    // Rewarding was successful
}

- (void)heliumRewardedAdDidGetRewardWithPlacementName:(NSString * _Nonnull)placementName {
    // Rewarding was successful
}

## Error Codes Helium 4.0.0 introduces a new system of errors (plus dozens of brand new ones) complete with diagnosis and recommendation. See [Error Codes](/en/mediation/integrate/ios/error-codes/) for more information.