> ## Documentation Index
> Fetch the complete documentation index at: https://mintlify.com/radarlabs/radar-sdk-ios/llms.txt
> Use this file to discover all available pages before exploring further.

# RadarChain

> Represents the chain of a place with name and metadata.

`RadarChain` represents the chain of a place. Learn more about [Places](https://radar.com/documentation/places).

## Properties

<ResponseField name="slug" type="String" required>
  The unique ID of the chain. For a full list of chains, see [Place Chains](https://radar.com/documentation/places/chains).
</ResponseField>

<ResponseField name="name" type="String" required>
  The name of the chain. For a full list of chains, see [Place Chains](https://radar.com/documentation/places/chains).
</ResponseField>

<ResponseField name="externalId" type="String">
  The external ID of the chain.
</ResponseField>

<ResponseField name="metadata" type="NSDictionary">
  The optional set of custom key-value pairs for the chain.
</ResponseField>

## Methods

### arrayForChains

```objective-c theme={null}
+ (NSArray<NSDictionary *> *_Nullable)arrayForChains:(NSArray<RadarChain *> *_Nullable)chains;
```

Converts an array of `RadarChain` objects to an array of dictionaries.

### dictionaryValue

```objective-c theme={null}
- (NSDictionary *_Nonnull)dictionaryValue;
```

Returns the dictionary representation of the chain.

## Example

```swift theme={null}
let place: RadarPlace = event.place
if let chain = place.chain {
    let chainSlug = chain.slug
    let chainName = chain.name
    let chainExternalId = chain.externalId
    let chainMetadata = chain.metadata
    
    if chainSlug == "starbucks" {
        // place is a Starbucks
    }
}
```

```objective-c theme={null}
RadarPlace *place = event.place;
RadarChain *chain = place.chain;
if (chain) {
    NSString *chainSlug = chain.slug;
    NSString *chainName = chain.name;
    NSString *chainExternalId = chain.externalId;
    NSDictionary *chainMetadata = chain.metadata;
    
    if ([chainSlug isEqualToString:@"starbucks"]) {
        // place is a Starbucks
    }
}
```