## FhircastEventPayload type [​](/content/docs/sdk/core.fhircasteventpayload#fhircasteventpayload-type/index.html)

**Signature:**

```typescript
export type FhircastEventPayload<EventName extends FhircastEventName = FhircastEventName> = {

'hub.topic': string;

'hub.event': EventName;

context: FhircastEventContext<EventName>[];

'context.versionId'?: string;

'context.priorVersionId'?: string;

};
```

**References:** [FhircastEventName](/content/docs/sdk/core.fhircasteventname), [FhircastEventContext](/content/docs/sdk/core.fhircasteventcontext)

- [FhircastEventPayload type](/content/docs/sdk/core.fhircasteventpayload#fhircasteventpayload-type/index.html)