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

## PingModeGrantProcessor Class

Handles CIBA ping mode token retrieval at the token endpoint\.
In ping mode, the server notifies the client, then the client makes a single token request\.
The auth\_req\_id is single\-use \(CIBA Core 1\.0 Section 7\.3\), so the grant is removed from storage
on retrieval — identically to poll mode \(Section 10\.1\.1 defines their token responses the same\)\.

```csharp
public class PingModeGrantProcessor : Abblix.Oidc.Server.Features.BackChannelAuthentication.Interfaces.IBackChannelGrantProcessor
```

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

Implements [IBackChannelGrantProcessor](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.BackChannelAuthentication.Interfaces.IBackChannelGrantProcessor 'Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.Interfaces\.IBackChannelGrantProcessor')
### Constructors

## PingModeGrantProcessor\(IBackChannelRequestStorage\) Constructor {#Abblix.Oidc.Server.Features.BackChannelAuthentication.GrantProcessors.PingModeGrantProcessor.PingModeGrantProcessor(Abblix.Oidc.Server.Features.BackChannelAuthentication.Interfaces.IBackChannelRequestStorage)}

Handles CIBA ping mode token retrieval at the token endpoint\.
In ping mode, the server notifies the client, then the client makes a single token request\.
The auth\_req\_id is single\-use \(CIBA Core 1\.0 Section 7\.3\), so the grant is removed from storage
on retrieval — identically to poll mode \(Section 10\.1\.1 defines their token responses the same\)\.

```csharp
public PingModeGrantProcessor(Abblix.Oidc.Server.Features.BackChannelAuthentication.Interfaces.IBackChannelRequestStorage storage);
```
#### Parameters

###### `storage` [IBackChannelRequestStorage](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.BackChannelAuthentication.Interfaces.IBackChannelRequestStorage 'Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.Interfaces\.IBackChannelRequestStorage') {#Abblix.Oidc.Server.Features.BackChannelAuthentication.GrantProcessors.PingModeGrantProcessor.PingModeGrantProcessor(Abblix.Oidc.Server.Features.BackChannelAuthentication.Interfaces.IBackChannelRequestStorage).storage}

Storage for backchannel authentication requests\.
### Methods

## PingModeGrantProcessor\.ProcessAuthenticatedRequestAsync\(string, BackChannelAuthenticationRequest\) Method {#Abblix.Oidc.Server.Features.BackChannelAuthentication.GrantProcessors.PingModeGrantProcessor.ProcessAuthenticatedRequestAsync(string,Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest)}

Atomically removes the authentication request from storage and returns its authorized grant\.
Because the auth\_req\_id can be used only once \(CIBA Core 1\.0 Section 7\.3\), a second retrieval
— or a concurrent one that lost the race — finds nothing and is rejected with
`invalid_grant` rather than re\-issuing tokens\.

```csharp
public System.Threading.Tasks.Task<Abblix.Utils.Result<Abblix.Oidc.Server.Endpoints.Token.Interfaces.AuthorizedGrant,Abblix.Oidc.Server.Common.OidcError>> ProcessAuthenticatedRequestAsync(string authenticationRequestId, Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest request);
```
#### Parameters

###### `authenticationRequestId` [System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String') {#Abblix.Oidc.Server.Features.BackChannelAuthentication.GrantProcessors.PingModeGrantProcessor.ProcessAuthenticatedRequestAsync(string,Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest).authenticationRequestId}

###### `request` [BackChannelAuthenticationRequest](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest 'Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.BackChannelAuthenticationRequest') {#Abblix.Oidc.Server.Features.BackChannelAuthentication.GrantProcessors.PingModeGrantProcessor.ProcessAuthenticatedRequestAsync(string,Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest).request}

Implements [ProcessAuthenticatedRequestAsync\(string, BackChannelAuthenticationRequest\)](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.BackChannelAuthentication.Interfaces.IBackChannelGrantProcessor#Abblix.Oidc.Server.Features.BackChannelAuthentication.Interfaces.IBackChannelGrantProcessor.ProcessAuthenticatedRequestAsync(string,Abblix.Oidc.Server.Features.BackChannelAuthentication.BackChannelAuthenticationRequest) 'Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.Interfaces\.IBackChannelGrantProcessor\.ProcessAuthenticatedRequestAsync\(string, Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.BackChannelAuthenticationRequest\)')

#### Returns
[System\.Threading\.Tasks\.Task&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')[Abblix\.Utils\.Result&lt;](https://learn.microsoft.com/en-us/dotnet/api/abblix.utils.result-2 'Abblix\.Utils\.Result\`2')[AuthorizedGrant](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.Token.Interfaces.AuthorizedGrant 'Abblix\.Oidc\.Server\.Endpoints\.Token\.Interfaces\.AuthorizedGrant')[,](https://learn.microsoft.com/en-us/dotnet/api/abblix.utils.result-2 'Abblix\.Utils\.Result\`2')[OidcError](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.OidcError 'Abblix\.Oidc\.Server\.Common\.OidcError')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/abblix.utils.result-2 'Abblix\.Utils\.Result\`2')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')

## PingModeGrantProcessor\.ValidateTokenEndpointAccess\(\) Method {#Abblix.Oidc.Server.Features.BackChannelAuthentication.GrantProcessors.PingModeGrantProcessor.ValidateTokenEndpointAccess()}

Ping mode clients are allowed to call the token endpoint after the ping notification arrives,
so this always returns `null` \(no error\)\.

```csharp
public Abblix.Oidc.Server.Common.OidcError? ValidateTokenEndpointAccess();
```

Implements [ValidateTokenEndpointAccess\(\)](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.BackChannelAuthentication.Interfaces.IBackChannelGrantProcessor#Abblix.Oidc.Server.Features.BackChannelAuthentication.Interfaces.IBackChannelGrantProcessor.ValidateTokenEndpointAccess() 'Abblix\.Oidc\.Server\.Features\.BackChannelAuthentication\.Interfaces\.IBackChannelGrantProcessor\.ValidateTokenEndpointAccess\(\)')

#### Returns
[OidcError](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.OidcError 'Abblix\.Oidc\.Server\.Common\.OidcError')