# Type Alias: TrackedEnvelope<TData>

> 

> **TrackedEnvelope**\<`TData`\>: \[`TrackedId`, `TData`, *typeof* `trackedSymbol`\]

Defined in: [packages/server/src/unstable-core-do-not-import/stream/tracked.ts:7](https://github.com/trpc/trpc/blob/7c907acfd8b31929214792e3b8c2ad7a8ac72563/packages/server/src/unstable-core-do-not-import/stream/tracked.ts#L7)

An event wrapped by `tracked()`, with its id.

## Type Parameters

| Type Parameter |
| ------ |
| `TData` |