Reader Update Publisher

readerUpdatePublisher

The readerUpdatePublisher is a PassthroughSubject exposed by the Tyro SDK to communicate information about the state of the reader on the device. It acts as a UI delegate that signals changes or updates to the reader.

Firmware updates on the reader can occur at any time and take anywhere between 1-2 minutes to finish so it is important to notify the app user of the status of the reader so they are not left waiting.

Ensure your app subscribes to readerUpdatePublisher early in the application lifecycle to capture all events, especially during the reader initialisation.

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public final public var readerUpdatePublisher: PassthroughSubject<ProximityReaderEvent, Never>

Events

Reader update event	Description
`updateStarted`	Reader update event has started
`updateInProgress(progress: Int)`	Progress of the reader update event. `progress` is an integer from 0-100 indicatoring the progress of the update
`updateCompleted`	Reader update has completed
`updateFailed(error: any Error)`	There was an error with the reader update. The inner `error` object contains more details.

Example

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import Combine

class ViewModel: ObservableObject {
  var tyroTapToPaySdk: TyroTapToPay
  private var cancellables = Set<AnyCancellable>()

  init() {
    tyroTapToPaySdk.readerUpdatePublisher
      .sink { event in
        switch event {
        case .updateStarted:
          print("Reader update started")
        case .updateInProgress(let progress):
          print("Updating reader: \(progress)%")
        case .updateCompleted:
          print("Reader update complete")
        case .updateFailed(let error):
          print("ERROR: Reader update failed: \(error)")
          // retry the update
        @unknown default:
          print("Unknown reader update event: \(event)")
        }
      }
      .store(in: &cancellables)
  }
}