Typescript and watcth stream type

[vnugent]

I'm evaluating the watch() feature to see if we can build a wiki-style edit tracking history.

I'm having difficulties defining a type and schema for the change event

model.watch('change', (change: ChangeEventType) => {
 // save to history collection ... 
})

export default interface ChangeEventType {
  _id: {
    _data: mongoose.Types.ObjectId
  }
  operationType: string
  clusterTime: Date
  ns: {
    db: string
    coll: string
  }
  documentKey: Object
  fullDocument: ClimbType | AreaType
}

Sample change event

{
  _id: {
    _data: '8262C83974000000012B022C0100296E5A10044976997D2EDB46DBAA66CCF461792262465A5F6964005A10040E025E07FDD553028DA7904056C952F30004'
  },
  operationType: 'replace',
  clusterTime: new Timestamp({ t: 1657289076, i: 1 }),
  fullDocument: {
    ... // application domain
  },
  ns: { db: 'testdb', coll: 'edit_history' },
  documentKey: {
    _id: new Binary(Buffer.from("0e025e07fdd553028da7904056c952f3", "hex"), 4)
  }
}

What is the correct type definition for _id and clusterTime?

Errors:

ValidationError: 
- climbHistory validation failed: event._id: Cast to ObjectId failed for value "{
  _data: '8262C83974000000012B022C0100296E5A10044976997D2EDB46DBAA66CCF461792262465A5F6964005A10040E025E07FDD553028DA7904056C952F30004'
}" (type Object) at path "_id" because of "BSONTypeError",
-  event.clusterTime: Cast to date failed for value "new Timestamp({ t: 1657289076, i: 1 })" (type Timestamp) at path "clusterTime"

[vkarpov15]

See MongoDB docs here: https://www.mongodb.com/docs/manual/reference/change-events/ _id: { _data: string } and clusterTime: mongodb.Timestamp should be the correct types