# IChannelIdMapper

Package: [Microsoft.Orleans.BroadcastChannel](/orleans/docs/api/csharp/microsoft.orleans.broadcastchannel/) 10.0.0

[NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.BroadcastChannel)

```csharp
public interface IChannelIdMapper
```

Common interface for component that map a [ChannelId](/orleans/docs/api/csharp/microsoft.orleans.broadcastchannel/orleans.broadcastchannel.channelid/) to a [GrainId](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.runtime.grainid/)

## Methods

- [GetGrainKeyId(GrainBindings, ChannelId)](/orleans/docs/api/csharp/microsoft.orleans.broadcastchannel/orleans.broadcastchannel.ichannelidmapper/methods/getgrainkeyid-orleans-metadata-grainbindings-orleans-broadcastchannel-channelid-b6ccab44/)