A PayPal API library written in Go

This library sets up a PayPal transaction and captures the transaction funds.

ShippingPreference defaults to NO_SHIPPING, so the PayPal window won't show the shipping information. Our example code does not send any shipping information to PayPal.

Example of usage

For the client side, follow:

• Set up a Transaction
• Capture Transaction Funds

On the server, first create a paypal.Config or load it from a JSON file:

paypalConfig, err := paypal.Load("paypal.json")
if err != nil {
	return err
}

Then set up a transaction:

// authenticate
authResult, err := paypalConfig.Auth()
if err != nil {
	return err
}

// call PayPal API to generate an order
generateOrderResponse, err := paypalConfig.CreateOrder(authResult, amountInCents)
if err != nil {
	return err
}

// return ID of generated order to the client
successResponse, err := json.Marshal(&paypal.SuccessResponse{OrderID: generateOrderResponse.ID})
if err != nil {
	return err
}
w.Header().Set("Content-Type", "application/json")
w.Write(successResponse)

Capture the funds:

// get the PayPal OrderID from the client, e.g. from the request body
captureRequest := &paypal.CaptureRequest{}
if err := json.NewDecoder(r.Body).Decode(captureRequest); err != nil {
	return err
}

// authenticate
authResult, err := paypalConfig.Auth()
if err != nil {
	return err
}

// call PayPal to capture the funds
captureResponse, err := paypalConfig.Capture(authResult, captureRequest.OrderID)
if err != nil {
	return err
}

// save the capture ID to your database
// captureResponse.PurchaseUnits[0].Payments.Captures[0].ID

// looks like the handler must return some JSON to the client, although the PayPal docs don't mention that
w.Header().Set("Content-Type", "application/json")
w.Write([]byte("true"))