Nordigen.Net

Unofficial .NET SDK for Nordigen. The only missing part are premiums. Because of the unclear documentation on the responses for them the Api, this library will remain on hold until further notice.

How to use it

1- Install the nuget package

Install-Package Nordigen.Net

2- Add a configuration section into your app, and configure it (the values shown below are the default ones except the keys)

"NordigenApi" : {
    "Url" : "https://ob.nordigen.com/",
    "SecretId" : "SOME_SECRET_ID_HERE",
    "SecretKey" : "SOME_SECRET_KEY_HERE",
    "AccessTokenValidBeforeSeconds" : 5,
    "RefreshTokenValidBeforeSeconds" : 5
}

Although this is not required is recommended if you want to use an internal api to test.

3- Add the SDK to your services collection

services.AddNordigenApi();

4- Now you can access a set of interfaces to reach the Nordigen platform

INordigenApi => Just inject this and you can have access to all the endpoints with the members
IAccountsEndpoint => Access to Accounts
IInstitutionsEndpoint => Access to Institutions
IRequisitionsEndpoint => Access to Requisitions
IAgreementsEndpoint => Access to Agreements

Retries

You can easily plug retries with Polly when registering the api. Install the nuget package

Install-Package Microsoft.Extensions.Http.Polly

Configure your retries:

services
  .AddNordigenApi()
  .AddPolicyHandler(
      HttpPolicyExtensions
        .HandleTransientHttpError()
        .OrResult(msg => msg.StatusCode == System.Net.HttpStatusCode.ServiceUnavailable)
        .WaitAndRetryAsync(6, retryAttempt => TimeSpan.FromSeconds(Math.Pow(2,retryAttempt))));

Result handling

The library uses discriminated unions to return values, when the second option will allways be an Error if present.

For example when querying accounts:

var result = await _accountsEndpoint.Get(id, cancellationToken);

_ = result.Match(
	   account => async _ => { await _accountsDatabase.SaveAsync(account, cancellationToken); },
	   error => { _logger.Error(error.Detail); }
	);

Token management

The SDK handles the lifetime/renewal of tokens automatically for you, so only requirement is to configure your SecretId and SecretKey

Credits

OneOf simplified credit goes to Harry McIntyre

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