FunStripe

An F# library to connect to the Stripe API, including code generators to update the model and requests. Targets .NET Framework 4.7.2, .NET Standard 2.1 and .NET 6.

Latest updates

2023-11-13: version 0.10.2 makes some minor performance enhancements.

2023-10-13: version 0.10.1 makes some minor tweaks to normalise the folder structure.

2023-10-11: version 0.10.0 fixes an issue with form serialisation that meant that JsonField names were only applied to the top level elements. It also tidies the code up a little.

2023-08-29: version 0.9.3 updates the Stripe API from version 2022-11-15 to 2023-08-16, which contains some breaking changes. See the Stripe API changelog for details. It also updates the package dependencies for FSharp.Core and FSharp.Data to 6.0.7 and 6.2.0 respectively.

2022-11-22: version 0.9.2 updates the Stripe API from version 2022-08-01 to 2022-11-15, which contains some breaking changes. See the Stripe API changelog for details. As .NET 5 is out-of-support, this has been removed from the target frameworks.

2022-10-04: version 0.9.0 updates the Stripe API from version 2020-08-27 to 2022-08-01, which contains some breaking changes. See the Stripe API changelog for details.

2022-04-22: a lightweight version of this library without the code generators is now available as FunStripeLite.

2021-07-18: version 0.8.0 updates the Stripe API from version 2020-03-02 to 2020-08-27, which contains some breaking changes. See the Stripe API changelog for details.

Installation

Get the latest version from Nuget

Usage

Open the StripeModel and StripeRequest modules.

Here's an example of how to create a new payment method:

let settings = RestApi.StripeApiSettings.New(apiKey = Config.StripeTestApiKey)

let getNewPaymentMethod () =
    asyncResult {
        return! 
            PaymentMethods.CreateOptions.New(
                card = Choice2Of2 (PaymentMethods.Create'CardTokenParams.New("tok_visa")),
                type' = PaymentMethods.Create'Type.Card
            )
            |> PaymentMethods.Create settings
    }

The result value is an AsyncResult<PaymentMethod,ErrorResponse>, giving you the requested object in case of success or a detailed error response if not.

The general format of API requests is <module>.<method> settings options.

To instantiate the settings you need to pass in your Stripe API key. Having local rather than global settings allows you to use different keys for different Stripe accounts if you need to.

If you don't specify the API key in the settings record, it will look for a default test API key to use, and to keep the keys out of source code, it uses UserSecrets. It is recommended to use UserSecrets during development and web-server configuration settings in production, but if your source code will not be made public you can simply specify the API key as a string, at least for testing purposes. Config.fs contains some notes to help you.

The options can be provided using record notation or if there are many uninitialised properties you can use the static New method to instantiate the record more effiently.

Code Generation

By cloning the source repository, as a developer you can use ModelBuilder.fs and RequestBuilder.fs to generate the code in StripeModel.fs and StripeRequest.fs respectively.

Using Visual Studio Code, you simply select all the text in each document and hit Alt + Enter to send the code to F# Interactive. This will overwrite the contents of the target modules.

The Stripe OpenAPI specification is stored locally as /res/spec3.sdk.json. See the references below for the link to the latest online version.

By replacing the local copy with the latest one from online, you can regenerate the source code and build it to get the latest changes.

You could also customise how the source code is represented by editing the builder code files.