Go Requires Chilkat v11.0.0+

PayPal: Create a reusable payment link for a service

See more PayPal Examples

Offer an annual inspection for USD 90 through PayPal-hosted checkout. Store the returned resource ID with the catalog item and share the payment_link URL with customers.

PayPal documentation

Go

    success := false

    //  See Unlock Chilkat before making requests.
    //  For the merchant's internal backoffice application. Load the sandbox token
    //  from the merchant's credential store. Keep it out of publicly distributed apps.
    //  See Get a PayPal access token.
    http := chilkat.NewHttp()
    http.SetAuthToken("SANDBOX_ACCESS_TOKEN")
    resp := chilkat.NewHttpResponse()

    //  Replace the thank-you URL with your business website. The same link can be shared
    //  with several customers.
    //  Create and persist this key once per business operation. On a timeout,
    //  retry the same request with its saved key, not a newly generated one.
    crypt := chilkat.NewCrypt2()
    requestId := crypt.GenerateUuid()
    http.SetRequestHeader("PayPal-Request-Id",*requestId)
    body := chilkat.NewJsonObject()
    body.UpdateString("integration_mode","LINK")
    body.UpdateString("type","BUY_NOW")
    body.UpdateString("reusable","MULTIPLE")
    body.UpdateString("return_url","https://merchant.example/thank-you")
    body.UpdateString("line_items[0].name","Annual inspection")
    body.UpdateString("line_items[0].unit_amount.currency_code","USD")
    body.UpdateString("line_items[0].unit_amount.value","90.00")

    success = http.HttpJson("POST","https://api-m.sandbox.paypal.com/v1/checkout/payment-resources",body,"application/json",resp)
    if success != true {
        fmt.Println("No HTTP response: ", http.LastErrorText())
        http.DisposeHttp()
        resp.DisposeHttpResponse()
        crypt.DisposeCrypt2()
        body.DisposeJsonObject()
        return
    }

    if (resp.StatusCode() < 200) || (resp.StatusCode() >= 300) {
        errorInfo := chilkat.NewJsonObject()
        errorInfo.Load(resp.BodyStr())
        fmt.Println("HTTP ", resp.StatusCode(), " ", *errorInfo.StringOf("name"), " ", *errorInfo.StringOf("details[0].issue"))
        fmt.Println("PayPal debug ID: ", *errorInfo.StringOf("debug_id"))
        http.DisposeHttp()
        resp.DisposeHttpResponse()
        crypt.DisposeCrypt2()
        body.DisposeJsonObject()
        errorInfo.DisposeJsonObject()
        return
    }

    result := chilkat.NewJsonObject()
    parsedResult := result.Load(resp.BodyStr())
    if parsedResult != true {
        fmt.Println("Expected a JSON response; HTTP ", resp.StatusCode())
        http.DisposeHttp()
        resp.DisposeHttpResponse()
        crypt.DisposeCrypt2()
        body.DisposeJsonObject()
        errorInfo.DisposeJsonObject()
        result.DisposeJsonObject()
        return
    }

    fmt.Println("Catalog payment resource ID: ", *result.StringOf("id"))
    //  Link order is not fixed. Find the customer-facing link to copy into an email.
    linkIndex := 0
    for (linkIndex < result.SizeOfArray("links")) {
        result.SetI(linkIndex)
        if result.StringOfEquals("links[i].rel","payment_link",true) {
            fmt.Println("Share this payment link: ", *result.StringOf("links[i].href"))
        }

        linkIndex = linkIndex + 1
    }


    http.DisposeHttp()
    resp.DisposeHttpResponse()
    crypt.DisposeCrypt2()
    body.DisposeJsonObject()
    errorInfo.DisposeJsonObject()
    result.DisposeJsonObject()