PromiseKit extension on Digits by Fabric.io

Digits+Promise.swift

import Foundation
import DigitsKit
import PromiseKit

extension Digits {

    public func authenticateWithCompletion() -> Promise<DGTSession> {
        return Promise(resolver: authenticateWithCompletion)
    }

    public func authenticateWithViewController(viewController: UIViewController?, configuration: DGTAuthenticationConfiguration) -> Promise<DGTSession> {
        return Promise { authenticateWithViewController(viewController, configuration: configuration, completion: $0) }
    }
    
}