#### [Abblix\.Oidc\.Server](https://www.abblix.com/docs/api/abblix-oidc-server 'index')
### [Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.AuthenticationNotifiers](https://www.abblix.com/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.BackChannelAuthentication.AuthenticationNotifiers 'Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.AuthenticationNotifiers')

## AuthenticationCompletionHandler Class

Abstract base class for CIBA authentication completion handlers\.
Provides common functionality for validation, status management, and delivery orchestration\.
Derived classes implement specific token delivery modes \(poll, ping, push\) per CIBA specification\.

```csharp
public abstract class AuthenticationCompletionHandler
```

Inheritance [System\.Object](https://learn.microsoft.com/en-us/dotnet/api/system.object 'System\.Object') → AuthenticationCompletionHandler

Derived  
↳ [PingModeCompletionHandler](https://www.abblix.com/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.BackChannelAuthentication.AuthenticationNotifiers.PingModeCompletionHandler 'Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.AuthenticationNotifiers\.PingModeCompletionHandler')  
↳ [PollModeCompletionHandler](https://www.abblix.com/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.BackChannelAuthentication.AuthenticationNotifiers.PollModeCompletionHandler 'Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.AuthenticationNotifiers\.PollModeCompletionHandler')  
↳ [PushModeCompletionHandler](https://www.abblix.com/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.BackChannelAuthentication.AuthenticationNotifiers.PushModeCompletionHandler 'Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.AuthenticationNotifiers\.PushModeCompletionHandler')

### Remarks
Do not add a converter\-less constructor overload for the convenience of a derived class: it would
compile and silently lose the comparison in [CompleteAuthenticationAsync\(string, BackChannelAuthenticationRequest, ClientInfo, TimeSpan\)](https://www.abblix.com/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.BackChannelAuthentication.AuthenticationNotifiers.AuthenticationCompletionHandler#Abblix.Oidc.Server.Features.BackChannelAuthentication.AuthenticationNotifiers.AuthenticationCompletionHandler.CompleteAuthenticationAsync(string,Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest,Abblix.Oidc.Server.Features.ClientInformation.ClientInfo,System.TimeSpan) 'Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.AuthenticationNotifiers\.AuthenticationCompletionHandler\.CompleteAuthenticationAsync\(string, Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.BackChannelAuthenticationRequest, Abblix\.Oidc\.Server\.Features\.ClientInformation\.ClientInfo, System\.TimeSpan\)'), which is what
keeps a request from being answered for an end user it did not name\.
### Methods

## AuthenticationCompletionHandler\.CompleteAuthenticationAsync\(string, BackChannelAuthenticationRequest, ClientInfo, TimeSpan\) Method {#Abblix.Oidc.Server.Features.BackChannelAuthentication.AuthenticationNotifiers.AuthenticationCompletionHandler.CompleteAuthenticationAsync(string,Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest,Abblix.Oidc.Server.Features.ClientInformation.ClientInfo,System.TimeSpan)}

Completes the authentication process by marking the request as authenticated and delegating
to the mode\-specific delivery implementation\.

```csharp
public System.Threading.Tasks.Task CompleteAuthenticationAsync(string authenticationRequestId, Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest request, Abblix.Oidc.Server.Features.ClientInformation.ClientInfo clientInfo, System.TimeSpan expiresIn);
```
#### Parameters

###### `authenticationRequestId` [System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String') {#Abblix.Oidc.Server.Features.BackChannelAuthentication.AuthenticationNotifiers.AuthenticationCompletionHandler.CompleteAuthenticationAsync(string,Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest,Abblix.Oidc.Server.Features.ClientInformation.ClientInfo,System.TimeSpan).authenticationRequestId}

The auth\_req\_id identifying the authentication request\.

###### `request` [BackChannelAuthenticationRequest](https://www.abblix.com/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest 'Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.BackChannelAuthenticationRequest') {#Abblix.Oidc.Server.Features.BackChannelAuthentication.AuthenticationNotifiers.AuthenticationCompletionHandler.CompleteAuthenticationAsync(string,Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest,Abblix.Oidc.Server.Features.ClientInformation.ClientInfo,System.TimeSpan).request}

The authentication request carrying the grant the end user approved\. Its
            own Status is not read: whether this request may still be answered is decided from the STORED
            record, so a caller cannot make the decision by setting a field on its own copy\.

###### `clientInfo` [ClientInfo](https://www.abblix.com/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.ClientInformation.ClientInfo 'Abblix\.Oidc\.Server\.Features\.ClientInformation\.ClientInfo') {#Abblix.Oidc.Server.Features.BackChannelAuthentication.AuthenticationNotifiers.AuthenticationCompletionHandler.CompleteAuthenticationAsync(string,Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest,Abblix.Oidc.Server.Features.ClientInformation.ClientInfo,System.TimeSpan).clientInfo}

Client information including delivery mode configuration\.

###### `expiresIn` [System\.TimeSpan](https://learn.microsoft.com/en-us/dotnet/api/system.timespan 'System\.TimeSpan') {#Abblix.Oidc.Server.Features.BackChannelAuthentication.AuthenticationNotifiers.AuthenticationCompletionHandler.CompleteAuthenticationAsync(string,Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest,Abblix.Oidc.Server.Features.ClientInformation.ClientInfo,System.TimeSpan).expiresIn}

How long the authenticated request remains valid\.

#### Returns
[System\.Threading\.Tasks\.Task](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task 'System\.Threading\.Tasks\.Task')  
A task representing the asynchronous authentication completion operation\.

#### Exceptions

[System\.InvalidOperationException](https://learn.microsoft.com/en-us/dotnet/api/system.invalidoperationexception 'System\.InvalidOperationException')  
The store does not hold a PENDING record under this
            identifier\. The full statement of the condition, and why it is stated that way rather than as a
            list of causes, is on [CompleteAsync\(string, BackChannelAuthenticationRequest, TimeSpan\)](https://www.abblix.com/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.BackChannelAuthentication.Interfaces.IAuthenticationCompletionHandler#Abblix.Oidc.Server.Features.BackChannelAuthentication.Interfaces.IAuthenticationCompletionHandler.CompleteAsync(string,Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest,System.TimeSpan) 'Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.Interfaces\.IAuthenticationCompletionHandler\.CompleteAsync\(string, Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.BackChannelAuthenticationRequest, System\.TimeSpan\)')\.

### Remarks
This method:
- Refuses unless the STORED record reads Pending
- Refuses an answer from somebody other than the end user the request named, by denying or
                removing according to the mode
- Sets the request status to Authenticated
- Delegates to HandleDeliveryAsync for mode-specific token delivery (poll/ping/push)

Called by AuthenticationCompletionRouter after determining the appropriate delivery mode handler\.