FirebaseAuth Framework Reference

PhoneMultiFactorGenerator

@available(iOS 13, tvOS 13, macOS 10.15, watchOS 7, *)
@objc(FIRPhoneMultiFactorGenerator)
open class PhoneMultiFactorGenerator : NSObject

The data structure used to help initialize an assertion for a second factor entity to the Firebase Auth/CICP server.

Depending on the type of second factor, this will help generate the assertion.

This class is available on iOS and macOS.


                    
                    
                    assertion(with:)

Initializes the MFA assertion to confirm ownership of the phone second factor.

Note that this API is used for both enrolling and signing in with a phone second factor.

Swift

@objc(assertionWithCredential:)
open class func assertion(with phoneAuthCredential: PhoneAuthCredential)
  -> PhoneMultiFactorAssertion


                                phoneAuthCredential

The phone auth credential used for multi factor flows.

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Last updated 2025-08-27 UTC.