Golang PayPal Quick And Dirty Shopping Cart Upload and Payment Execution

main.go

package main

import (
	"encoding/json"
	"fmt"
	"log"
	"os"
	"strings"

	"github.com/logpacker/PayPal-Go-SDK"
)

// All Constants //
const (
	PPAccount  = "[email protected]"
	PPClientID = "<The Client ID from PayPal Live or Sandbox>"
	PPSecret   = "<The Secret from Paypal Live or Sandbox>"
)

// A Hacky struct pretty printer for console
func pp(msg string, v interface{}) {
	b, err := json.MarshalIndent(v, "", "    ")
	if err != nil {
		log.Fatal(err)
	}
	sep := strings.Repeat("-", len(msg))
	fmt.Printf("\033[1;33m%s\n%s\n%s\n%s\n\n\033[0m", sep, msg, sep, string(b))
}

func main() {
	fmt.Println("Starting PayPal Tests")
	fmt.Println("=====================")
	fmt.Println()

	c, err := paypalsdk.NewClient(PPClientID, PPSecret, paypalsdk.APIBaseSandBox)
	if err != nil {
		log.Fatal(err)
	}
	c.SetLog(os.Stderr)

	accessToken, err := c.GetAccessToken()
	if err != nil {
		log.Fatal(err)
	}
	pp("accessToken", accessToken)

	if len(os.Args) == 2 {
		paymentID := strings.TrimSpace(os.Args[1])
		payment, err2 := c.GetPayment(paymentID)
		if err2 != nil {
			log.Fatal(err2)
		}
		pp("payment", payment)
		return
	}

	if len(os.Args) == 3 {
		paymentID := strings.TrimSpace(os.Args[1])
		payerID := strings.TrimSpace(os.Args[2])
		executeResponse, err2 := c.ExecuteApprovedPayment(paymentID, payerID)
		if err2 != nil {
			log.Fatal(err2)
		}
		pp("executeResponse", executeResponse)
		return
	}

	customPayment := paypalsdk.Payment{

		Intent: "sale",
		Payer: &paypalsdk.Payer{
			PaymentMethod: "paypal",
		},
		Transactions: []paypalsdk.Transaction{
			paypalsdk.Transaction{
				Amount: &paypalsdk.Amount{
					Currency: "MXN",
					Total:    "120.00",
				},
				Description:    "Some description here",
				Custom:         "user_id:123",
				SoftDescriptor: "DULC-MDJ",
				ItemList: &paypalsdk.ItemList{
					Items: []paypalsdk.Item{
						paypalsdk.Item{
							SKU:         "UPCCODE1000",
							Name:        "Item 1 Name",
							Description: "Some desc for item 1",
							Quantity:    10,
							Price:       "4.00",
							Currency:    "MXN",
						},
						paypalsdk.Item{
							SKU:         "UPCCODE1001",
							Name:        "Item 2 Name",
							Description: "Some desc for item 2",
							Quantity:    4,
							Price:       "20.00",
							Currency:    "MXN",
						},
					},
				},
			},
		},
		RedirectURLs: &paypalsdk.RedirectURLs{
			CancelURL: "https://dulceriamdj.com:7143/paypal/cancel",
			ReturnURL: "https://dulceriamdj.com:7143/paypal/approved",
		},
	}

	paymentResponse, err := c.CreatePayment(customPayment)
	if err != nil {
		log.Fatal(err)
	}
	pp("paymentResponse", paymentResponse)
}