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payment-poc
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Added payment update action

This commit is contained in:
Borna Rajković 2023-07-31 09:21:54 +02:00
parent b6203d8a03
commit fe6f3b6672
12 changed files with 420 additions and 105 deletions
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161
main.go
View File

@ -14,11 +14,11 @@ import (
"os"
"payment-poc/database"
"payment-poc/migration"
"payment-poc/mock"
"payment-poc/state"
stripe2 "payment-poc/stripe"
"payment-poc/viva"
"payment-poc/wspay"
"sort"
"strconv"
"strings"
"time"
@ -28,9 +28,11 @@ import (
var devMigrations embed.FS
type PaymentProvider interface {
CreatePaymentUrl(amount int64) (string, error)
CreatePaymentUrl(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, url string, err error)
CompleteTransaction(entry database.PaymentEntry, amount int64) (database.PaymentEntry, error)
CancelTransaction(entry database.PaymentEntry) (database.PaymentEntry, error)
UpdatePayment(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, err error)
}
func init() {
@ -56,10 +58,11 @@ func main() {
}
g.SetFuncMap(template.FuncMap{
"formatCurrency": formatCurrency,
"decimalCurrency": decimalCurrency,
"formatState": formatState,
"omitempty": omitempty,
"formatCurrency": formatCurrency,
"formatCurrencyPtr": formatCurrencyPtr,
"decimalCurrency": decimalCurrency,
"formatState": formatState,
"omitempty": omitempty,
})
g.NoRoute(func(c *gin.Context) {
@ -72,40 +75,45 @@ func main() {
backendUrl := envMustExist("BACKEND_URL")
paymentGateways := map[state.PaymentGateway]PaymentProvider{}
entryProvider := database.PaymentEntryProvider{DB: client}
entryProvider := &database.PaymentEntryProvider{DB: client}
g.LoadHTMLGlob("./templates/*.gohtml")
if hasProfile(string(state.GatewayMock)) {
mockService := mock.Service{
BackendUrl: backendUrl,
}
mockHandlers(g.Group("mock"), entryProvider, &mockService)
paymentGateways[state.GatewayMock] = &mockService
}
if hasProfile(string(state.GatewayWsPay)) {
wspayService := wspay.Service{
Provider: &entryProvider,
ShopId: envMustExist("WSPAY_SHOP_ID"),
ShopSecret: envMustExist("WSPAY_SHOP_SECRET"),
BackendUrl: backendUrl,
}
setupWsPayEndpoints(g.Group("wspay"), &wspayService)
wsPayHandlers(g.Group("wspay"), entryProvider, &wspayService)
paymentGateways[state.GatewayWsPay] = &wspayService
}
if hasProfile(string(state.GatewayStripe)) {
stripeService := stripe2.Service{
Provider: &entryProvider,
ApiKey: envMustExist("STRIPE_KEY"),
BackendUrl: backendUrl,
}
setupStripeEndpoints(g.Group("stripe"), &stripeService)
stripeHandlers(g.Group("stripe"), entryProvider, &stripeService)
paymentGateways[state.GatewayStripe] = &stripeService
stripe.Key = envMustExist("STRIPE_KEY")
}
if hasProfile(string(state.GatewayVivaWallet)) {
vivaService := viva.Service{
Provider: &entryProvider,
ClientId: envMustExist("VIVA_WALLET_CLIENT_ID"),
ClientSecret: envMustExist("VIVA_WALLET_CLIENT_SECRET"),
SourceCode: envMustExist("VIVA_WALLET_SOURCE_CODE"),
MerchantId: envMustExist("VIVA_WALLET_MERCHANT_ID"),
ApiKey: envMustExist("VIVA_WALLET_API_KEY"),
}
setupVivaEndpoints(g.Group("viva"), &vivaService)
vivaHandlers(g.Group("viva"), entryProvider, &vivaService)
paymentGateways[state.GatewayVivaWallet] = &vivaService
}
@ -118,16 +126,9 @@ func main() {
if err != nil {
amount = 10.00
}
var gateways []state.PaymentGateway
for key := range paymentGateways {
gateways = append(gateways, key)
}
sort.Slice(gateways, func(i, j int) bool {
return string(gateways[i]) < string(gateways[j])
})
c.HTML(200, "methods.gohtml", gin.H{"Amount": amount, "Gateways": gateways})
c.HTML(200, "methods.gohtml", gin.H{"Amount": amount, "Gateways": mapGateways(paymentGateways)})
})
g.GET("/:gateway", func(c *gin.Context) {
g.GET("/methods/:gateway", func(c *gin.Context) {
gateway, err := fetchGateway(c.Param("gateway"))
if err != nil {
c.AbortWithError(http.StatusBadRequest, err)
@ -139,7 +140,13 @@ func main() {
c.AbortWithError(http.StatusBadRequest, err)
return
}
if url, err := paymentGateway.CreatePaymentUrl(amount); err == nil {
entry, err := entryProvider.CreateEntry(database.PaymentEntry{
Gateway: gateway,
State: state.StatePreinitialized,
TotalAmount: amount,
})
if entry, url, err := paymentGateway.CreatePaymentUrl(entry); err == nil {
entryProvider.UpdateEntry(entry)
c.Redirect(http.StatusSeeOther, url)
} else {
c.AbortWithError(http.StatusBadRequest, err)
@ -210,10 +217,81 @@ func main() {
}
}
})
g.POST("/entries/:id/refresh", func(c *gin.Context) {
id := uuid.MustParse(c.Param("id"))
entry, err := entryProvider.FetchById(id)
if err != nil {
c.AbortWithError(http.StatusBadRequest, err)
return
}
if paymentGateway, ok := paymentGateways[entry.Gateway]; ok {
entry, err = paymentGateway.UpdatePayment(entry)
if err == nil {
entryProvider.UpdateEntry(entry)
}
c.Redirect(http.StatusSeeOther, "/entries/"+id.String())
} else {
if err != nil {
c.AbortWithError(http.StatusInternalServerError, errors.New("payment gateway not supported: "+string(entry.Gateway)))
return
}
}
})
log.Fatal(http.ListenAndServe(":5281", g))
}
func mockHandlers(g *gin.RouterGroup, provider *database.PaymentEntryProvider, mockService *mock.Service) {
g.GET("/gateway/:id", func(c *gin.Context) {
id := uuid.MustParse(c.Param("id"))
entry, err := provider.FetchById(id)
if err != nil {
c.AbortWithError(http.StatusBadRequest, err)
return
}
c.HTML(http.StatusOK, "mock_gateway.gohtml", gin.H{"Entry": entry})
})
g.GET("success", func(c *gin.Context) {
url, err := mockService.HandleResponse(c, provider, state.StateAccepted)
if err != nil {
c.AbortWithError(http.StatusInternalServerError, err)
return
}
c.Redirect(http.StatusSeeOther, url)
})
g.GET("error", func(c *gin.Context) {
url, err := mockService.HandleResponse(c, provider, state.StateError)
if err != nil {
c.AbortWithError(http.StatusInternalServerError, err)
return
}
c.Redirect(http.StatusSeeOther, url)
})
}
func mapGateways(gateways map[state.PaymentGateway]PaymentProvider) map[string]string {
providerMap := map[string]string{}
for key := range gateways {
providerMap[string(key)] = mapGatewayName(key)
}
return providerMap
}
func mapGatewayName(key state.PaymentGateway) string {
switch key {
case state.GatewayStripe:
return "Stripe"
case state.GatewayVivaWallet:
return "Viva wallet"
case state.GatewayWsPay:
return "WsPay"
case state.GatewayMock:
return "mock"
}
return ""
}
func fetchGateway(gateway string) (state.PaymentGateway, error) {
switch gateway {
case string(state.GatewayWsPay):
@ -222,6 +300,8 @@ func fetchGateway(gateway string) (state.PaymentGateway, error) {
return state.GatewayStripe, nil
case string(state.GatewayVivaWallet):
return state.GatewayVivaWallet, nil
case string(state.GatewayMock):
return state.GatewayMock, nil
}
return "", errors.New("unknown gateway: " + gateway)
}
@ -239,9 +319,9 @@ func fetchAmount(amount string) (int64, error) {
}
}
func setupVivaEndpoints(g *gin.RouterGroup, vivaService *viva.Service) {
func vivaHandlers(g *gin.RouterGroup, provider *database.PaymentEntryProvider, vivaService *viva.Service) {
g.GET("success", func(c *gin.Context) {
url, err := vivaService.HandleResponse(c, state.StateAccepted)
url, err := vivaService.HandleResponse(c, provider, state.StateAccepted)
if err != nil {
c.AbortWithError(http.StatusInternalServerError, err)
return
@ -249,7 +329,7 @@ func setupVivaEndpoints(g *gin.RouterGroup, vivaService *viva.Service) {
c.Redirect(http.StatusSeeOther, url)
})
g.GET("error", func(c *gin.Context) {
url, err := vivaService.HandleResponse(c, state.StateError)
url, err := vivaService.HandleResponse(c, provider, state.StateError)
if err != nil {
c.AbortWithError(http.StatusInternalServerError, err)
return
@ -258,10 +338,10 @@ func setupVivaEndpoints(g *gin.RouterGroup, vivaService *viva.Service) {
})
}
func setupStripeEndpoints(g *gin.RouterGroup, stripeService *stripe2.Service) {
func stripeHandlers(g *gin.RouterGroup, provider *database.PaymentEntryProvider, stripeService *stripe2.Service) {
g.GET("success", func(c *gin.Context) {
url, err := stripeService.HandleResponse(c, state.StateAccepted)
url, err := stripeService.HandleResponse(c, provider, state.StateAccepted)
if err != nil {
c.AbortWithError(http.StatusInternalServerError, err)
return
@ -269,7 +349,7 @@ func setupStripeEndpoints(g *gin.RouterGroup, stripeService *stripe2.Service) {
c.Redirect(http.StatusSeeOther, url)
})
g.GET("error", func(c *gin.Context) {
url, err := stripeService.HandleResponse(c, state.StateError)
url, err := stripeService.HandleResponse(c, provider, state.StateError)
if err != nil {
c.AbortWithError(http.StatusInternalServerError, err)
return
@ -278,25 +358,24 @@ func setupStripeEndpoints(g *gin.RouterGroup, stripeService *stripe2.Service) {
})
}
func setupWsPayEndpoints(g *gin.RouterGroup, wspayService *wspay.Service) {
func wsPayHandlers(g *gin.RouterGroup, provider *database.PaymentEntryProvider, wspayService *wspay.Service) {
g.GET("/initialize/:id", func(c *gin.Context) {
entry, err := wspayService.Provider.FetchById(uuid.MustParse(c.Param("id")))
entry, err := provider.FetchById(uuid.MustParse(c.Param("id")))
if err != nil {
c.AbortWithError(http.StatusNotFound, err)
return
}
if entry.State != state.StateInitialized {
if entry.State != state.StatePreinitialized {
c.AbortWithError(http.StatusBadRequest, err)
return
}
form := wspayService.InitializePayment(entry)
c.HTML(200, "wspay.gohtml", gin.H{"Action": wspay.AuthorisationForm, "Form": form})
})
g.GET("success", func(c *gin.Context) {
url, err := wspayService.HandleSuccessResponse(c)
url, err := wspayService.HandleSuccessResponse(c, provider)
if err != nil {
c.AbortWithError(http.StatusInternalServerError, err)
return
@ -304,7 +383,7 @@ func setupWsPayEndpoints(g *gin.RouterGroup, wspayService *wspay.Service) {
c.Redirect(http.StatusSeeOther, url)
})
g.GET("error", func(c *gin.Context) {
url, err := wspayService.HandleErrorResponse(c, state.StateError)
url, err := wspayService.HandleErrorResponse(c, provider, state.StateError)
if err != nil {
c.AbortWithError(http.StatusInternalServerError, err)
return
@ -312,7 +391,7 @@ func setupWsPayEndpoints(g *gin.RouterGroup, wspayService *wspay.Service) {
c.Redirect(http.StatusSeeOther, url)
})
g.GET("cancel", func(c *gin.Context) {
url, err := wspayService.HandleErrorResponse(c, state.StateCanceled)
url, err := wspayService.HandleErrorResponse(c, provider, state.StateCanceled)
if err != nil {
c.AbortWithError(http.StatusInternalServerError, err)
return
@ -336,7 +415,7 @@ func formatState(stt state.PaymentState) string {
case state.StateCanceled:
return "Otkazana"
case state.StateVoided:
return "Otkazana sa strane administratora"
return "Poništena"
case state.StateAccepted:
return "Predautorizirana"
case state.StateError:
@ -357,6 +436,14 @@ func formatCurrency(current int64) string {
return fmt.Sprintf("%d,%02d", current/100, current%100)
}
func formatCurrencyPtr(current *int64) string {
if current != nil {
return fmt.Sprintf("%d,%02d", (*current)/100, (*current)%100)
} else {
return "-"
}
}
func decimalCurrency(current int64) string {
return fmt.Sprintf("%d,%02d", current/100, current%100)
}

4
state/model.go
View File

@ -8,6 +8,9 @@ const (
// initial state
StateInitialized PaymentState = "initialized"
// state given to async payments (eg. GooglePay,ApplePay...)
StatePending PaymentState = "pending"
// state on response
StateAccepted PaymentState = "accepted"
StateError PaymentState = "error"
@ -25,4 +28,5 @@ const (
GatewayWsPay PaymentGateway = "wspay"
GatewayStripe PaymentGateway = "stripe"
GatewayVivaWallet PaymentGateway = "viva-wallet"
GatewayMock PaymentGateway = "mock"
)

66
stripe/service.go
View File

@ -12,29 +12,53 @@ import (
)
type Service struct {
Provider *database.PaymentEntryProvider
ApiKey string
BackendUrl string
}
func (s *Service) CreatePaymentUrl(amount int64) (url string, err error) {
entry, err := s.Provider.CreateEntry(database.PaymentEntry{
Gateway: state.GatewayStripe,
State: state.StateInitialized,
TotalAmount: amount,
})
func (s *Service) UpdatePayment(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, err error) {
pi, err := paymentintent.Get(*entry.PaymentIntentId, nil)
if err != nil {
return "", err
return entry, err
}
entry, url, err = s.InitializePayment(entry)
newState := determineState(pi.Status)
if entry.State != newState && newState != "" {
log.Printf("Updated state for %s: %s -> %s", entry.Id.String(), entry.State, newState)
if pi.AmountReceived > 0 {
entry.Amount = &pi.AmountReceived
}
entry.State = newState
}
return entry, nil
}
func determineState(status stripe.PaymentIntentStatus) state.PaymentState {
switch status {
case stripe.PaymentIntentStatusCanceled:
return state.StateCanceled
case stripe.PaymentIntentStatusProcessing:
return state.StatePending
case stripe.PaymentIntentStatusRequiresAction:
return state.StatePending
case stripe.PaymentIntentStatusRequiresCapture:
return state.StateAccepted
case stripe.PaymentIntentStatusRequiresConfirmation:
return state.StatePending
case stripe.PaymentIntentStatusRequiresPaymentMethod:
return state.StateVoided
case stripe.PaymentIntentStatusSucceeded:
return state.StateCompleted
}
return ""
}
func (s *Service) CreatePaymentUrl(entry database.PaymentEntry) (database.PaymentEntry, string, error) {
entry, url, err := s.InitializePayment(entry)
if err != nil {
return "", err
return entry, "", err
}
entry, err = s.Provider.UpdateEntry(entry)
if err != nil {
return "", err
}
return url, nil
return entry, url, nil
}
func (s *Service) InitializePayment(entry database.PaymentEntry) (database.PaymentEntry, string, error) {
@ -68,6 +92,7 @@ func (s *Service) InitializePayment(entry database.PaymentEntry) (database.Payme
if err != nil {
return database.PaymentEntry{}, "", err
}
entry.State = state.StateInitialized
entry.PaymentIntentId = &result.PaymentIntent.ID
return entry, result.URL, nil
@ -82,9 +107,10 @@ func (s *Service) CompleteTransaction(entry database.PaymentEntry, amount int64)
return database.PaymentEntry{}, err
}
log.Printf("received state on completion: %v", pi.Status)
if pi.Status == stripe.PaymentIntentStatusSucceeded || pi.Status == stripe.PaymentIntentStatusProcessing {
newState := determineState(pi.Status)
entry.State = newState
if newState == state.StateCompleted || newState == state.StatePending {
entry.Amount = &pi.AmountReceived
entry.State = state.StateCompleted
}
return entry, nil
}
@ -102,13 +128,13 @@ func (s *Service) CancelTransaction(entry database.PaymentEntry) (database.Payme
return entry, nil
}
func (s *Service) HandleResponse(c *gin.Context, paymentState state.PaymentState) (string, error) {
func (s *Service) HandleResponse(c *gin.Context, provider *database.PaymentEntryProvider, paymentState state.PaymentState) (string, error) {
id := uuid.MustParse(c.Query("token"))
entry, err := s.Provider.FetchById(id)
entry, err := provider.FetchById(id)
if err != nil {
return "", err
}
entry.State = paymentState
s.Provider.UpdateEntry(entry)
provider.UpdateEntry(entry)
return "/entries/" + entry.Id.String(), nil
}

11
templates/index.gohtml
View File

@ -24,7 +24,15 @@
}
</style>
</head>
<body class="container">
<body>
<!-- As a link -->
<nav class="navbar navbar-dark bg-dark">
<section class="container">
<a class="navbar-brand" href="/">Payment-poc</a>
</section>
</nav>
<section class="container">
<h2>Novo plaćanje</h2>
<form method="get" action="/methods">
@ -58,5 +66,6 @@
</tbody>
</table>
</div>
</section>
</body>
</html>

20
templates/info.gohtml
View File

@ -15,16 +15,30 @@
}
</style>
</head>
<body class="container">
<body>
<!-- As a link -->
<nav class="navbar navbar-dark bg-dark">
<section class="container">
<a class="navbar-brand" href="/">Payment-poc</a>
</section>
</nav>
<section class="container">
<h2>Plaćanje {{.Entry.Id}}</h2>
{{if not (eq .Entry.State "preinitialized")}}
<form method="post" action="/entries/{{.Entry.Id}}/refresh">
<button class="btn btn-primary">Ažuriraj</button>
</form>
{{end}}
<table class="table">
<tr><th>Id: </th><td>{{.Entry.Id}}</td></tr>
<tr><th>Datum izrade: </th><td>{{.Entry.Created.Format "Jan 02, 2006 15:04:05 UTC"}}</td></tr>
<tr><th>Zadnja izmjena: </th><td>{{or (.Entry.Modified.Format "Jan 02, 2006 15:04:05 UTC") .Entry.Created.Format "Jan 02, 2006 15:04:05 UTC"}}</td></tr>
<tr><th>Gateway: </th><td>{{.Entry.Gateway}}</td></tr>
<tr><th>Naplaćena vrijednost: </th><td>{{or .Entry.Amount "-"}}</td></tr>
<tr><th>Naplaćena vrijednost: </th><td>{{formatCurrencyPtr .Entry.Amount}}</td></tr>
<tr><th>Ukupna vrijednost: </th><td>{{formatCurrency .Entry.TotalAmount}}</td></tr>
<tr><th>Jezik: </th><td>{{or .Entry.Lang "-"}}</td></tr>
<tr><th>Greške: </th><td>{{or .Entry.Error "-"}}</td></tr>
@ -32,7 +46,6 @@
{{if eq .Entry.Gateway "wspay"}}
<tr><th>WsPay</th><td></td></tr>
<tr><th>Shopping cart ID: </th><td>{{or .Entry.ShoppingCartID "-"}}</td></tr>
<tr><th>Success: </th><td>{{or .Entry.Success "-"}}</td></tr>
{{end}}
@ -61,5 +74,6 @@
<button class="btn btn-primary" type="submit">Otkaži plaćanje</button>
</form>
{{end}}
</section>
</body>
</html>

15
templates/methods.gohtml
View File

@ -21,10 +21,19 @@
}
</style>
</head>
<body class="container">
<body>
<!-- As a link -->
<nav class="navbar navbar-dark bg-dark">
<section class="container">
<a class="navbar-brand" href="/">Payment-poc</a>
</section>
</nav>
<section class="container">
<h2>Izaberi metodu plaćanja</h2>
{{range .Gateways}}
<a class="btn btn-success" href="/{{.}}?amount={{$.Amount}}">{{.}}</a>
{{ range $key, $value := .Gateways }}
<a class="btn btn-success" href="/methods/{{$key}}?amount={{$.Amount}}">{{$value}}</a>
{{end}}
</section>
</body>
</html>

27
templates/mock_gateway.gohtml Normal file
View File

@ -0,0 +1,27 @@
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Index</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-geWF76RCwLtnZ8qwWowPQNguL3RmwHVBC9FhGdlKrxdiJJigb/j/68SIy3Te4Bkz" crossorigin="anonymous"></script>
</head>
<body>
<!-- As a link -->
<nav class="navbar navbar-dark bg-dark">
<section class="container">
<a class="navbar-brand" href="/">Payment-poc</a>
</section>
</nav>
<section class="container">
<h2>Mock gateway {{.Entry.Id.String}}</h2>
<p>{{formatCurrency .Entry.TotalAmount}}</p>
<a href="/mock/success?id={{.Entry.Id.String}}" class="btn btn-success">Potvrdi plaćanje</a>
<a href="/mock/error?id={{.Entry.Id.String}}" class="btn btn-danger">Otkaži plaćanje</a>
</section>
</body>
</html>

4
templates/wspay.gohtml
View File

@ -5,7 +5,7 @@
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Izradi plančanje</title>
<title>Izradi planćanje</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-geWF76RCwLtnZ8qwWowPQNguL3RmwHVBC9FhGdlKrxdiJJigb/j/68SIy3Te4Bkz" crossorigin="anonymous"></script>
<style>
@ -15,7 +15,7 @@
</style>
</head>
<body class="container" style="margin-top: 32px">
<h2>Započni proces plačanja</h2>
<h2>Započni proces plaćanja</h2>
<form id="wspay-form" action="{{.Action}}" method="POST">
<input type="hidden" name="ShopID" value="{{.Form.ShopID}}">

67
viva/service.go
View File

@ -18,7 +18,6 @@ import (
)
type Service struct {
Provider *database.PaymentEntryProvider
ClientId string
ClientSecret string
SourceCode string
@ -30,24 +29,57 @@ type Service struct {
expiration time.Time
}
func (s *Service) CreatePaymentUrl(amount int64) (url string, err error) {
entry, err := s.Provider.CreateEntry(database.PaymentEntry{
Gateway: state.GatewayVivaWallet,
State: state.StateInitialized,
TotalAmount: amount,
})
func (s *Service) UpdatePayment(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, err error) {
token, err := s.oAuthToken()
httpResponse, err := createRequest(
"GET",
"https://demo-api.vivapayments.com/checkout/v2/transactions/"+entry.TransactionId.String(),
map[string]string{"authorization": "Bearer " + token, "content-type": "application/json"},
[]byte{},
)
if err != nil {
return "", err
return database.PaymentEntry{}, err
}
entry, err = s.InitializePayment(entry)
var response TransactionStatusResponse
err = readResponse(httpResponse, &response)
if err != nil {
return "", err
return database.PaymentEntry{}, err
}
entry, err = s.Provider.UpdateEntry(entry)
newState := determineStatus(response.StatusId)
if entry.State != newState && newState != "" {
log.Printf("Updated state for %s: %s -> %s", entry.Id.String(), entry.State, newState)
entry.State = newState
}
return entry, nil
}
func determineStatus(id TransactionStatus) state.PaymentState {
switch id {
case PaymentPreauthorized:
return state.StateAccepted
case PaymentPending:
return state.StatePending
case PaymentSuccessful:
return state.StateCompleted
case PaymentUnsuccessful:
return state.StateError
case PaymentRefunded:
return state.StateVoided
case PaymentVoided:
return state.StateVoided
}
log.Printf("Unknonw transactionStatus: %s", string(id))
return ""
}
func (s *Service) CreatePaymentUrl(entry database.PaymentEntry) (database.PaymentEntry, string, error) {
entry, err := s.InitializePayment(entry)
if err != nil {
return "", err
return entry, "", err
}
return "https://demo.vivapayments.com/web/checkout?ref=" + string(*entry.OrderId), nil
return entry, "https://demo.vivapayments.com/web/checkout?ref=" + string(*entry.OrderId), nil
}
func (s *Service) InitializePayment(entry database.PaymentEntry) (database.PaymentEntry, error) {
@ -80,6 +112,7 @@ func (s *Service) InitializePayment(entry database.PaymentEntry) (database.Payme
if err != nil {
return database.PaymentEntry{}, err
}
entry.State = state.StateInitialized
entry.OrderId = &response.OrderId
return entry, nil
}
@ -208,7 +241,7 @@ func (s *Service) basicAuth() string {
return base64.StdEncoding.EncodeToString([]byte(s.MerchantId + ":" + s.ApiKey))
}
func (s *Service) HandleResponse(c *gin.Context, expectedState state.PaymentState) (string, error) {
func (s *Service) HandleResponse(c *gin.Context, provider *database.PaymentEntryProvider, state state.PaymentState) (string, error) {
transactionId := uuid.MustParse(c.Query("t"))
orderId := database.OrderId(c.Query("s"))
lang := c.Query("lang")
@ -216,19 +249,19 @@ func (s *Service) HandleResponse(c *gin.Context, expectedState state.PaymentStat
eci := c.Query("eci")
log.Printf("Received error response for viva payment %s", orderId)
entry, err := s.Provider.FetchByOrderId(orderId)
entry, err := provider.FetchByOrderId(orderId)
if err != nil {
log.Printf("Couldn't find payment info for viva payment %s", orderId)
return "", err
}
entry.State = expectedState
entry.State = state
entry.ECI = &eci
entry.Lang = &lang
entry.EventId = &eventId
entry.TransactionId = &transactionId
if _, err := s.Provider.UpdateEntry(entry); err != nil {
if _, err := provider.UpdateEntry(entry); err != nil {
return "", err
}

20
viva/viva.go
View File

@ -33,3 +33,23 @@ type TransactionResponse struct {
EventId int64 `json:"EventId"`
Success bool `json:"Success"`
}
type TransactionStatus string
const (
PaymentSuccessful TransactionStatus = "F"
PaymentPending TransactionStatus = "A"
PaymentPreauthorized TransactionStatus = "C"
PaymentUnsuccessful TransactionStatus = "E"
PaymentRefunded TransactionStatus = "R"
PaymentVoided TransactionStatus = "X"
)
type TransactionStatusResponse struct {
Email string `json:"email"`
Amount int `json:"amount"`
OrderCode database.OrderId `json:"orderCode"`
StatusId TransactionStatus `json:"statusId"`
FullName string `json:"fullName"`
CardNumber string `json:"cardNumber"`
}

118
wspay/service.go
View File

@ -9,6 +9,7 @@ import (
"github.com/gin-gonic/gin"
"github.com/google/uuid"
"io"
"log"
"net/http"
"payment-poc/database"
"payment-poc/state"
@ -16,22 +17,67 @@ import (
)
type Service struct {
Provider *database.PaymentEntryProvider
ShopId string
ShopSecret string
BackendUrl string
}
func (s *Service) CreatePaymentUrl(amount int64) (string, error) {
entry, err := s.Provider.CreateEntry(database.PaymentEntry{
Gateway: state.GatewayWsPay,
State: state.StateInitialized,
TotalAmount: amount,
})
if err != nil {
return "", err
func (s *Service) UpdatePayment(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, err error) {
var request = StatusCheckRequest{
Version: "2.0",
ShopId: s.ShopId,
ShoppingCartId: entry.Id.String(),
Signature: CalculateStatusCheckSignature(s.ShopId, s.ShopSecret, entry.Id.String()),
}
return "/wspay/initialize/" + entry.Id.String(), nil
httpResponse, err := createRequest(
"POST",
"https://test.wspay.biz/api/services/statusCheck",
map[string]string{"content-type": "application/json"},
toJson(request),
)
if err != nil {
return database.PaymentEntry{}, err
}
var response StatusCheckResponse
err = readResponse(httpResponse, &response)
if err != nil {
return database.PaymentEntry{}, err
}
if CompareStatusCheckReturnSignature(response.Signature, s.ShopId, s.ShopSecret, response.ActionSuccess, response.ApprovalCode, entry.Id.String()) != nil {
entry.Amount = &response.Amount
newState := determineState(response)
if entry.State != newState && newState != "" {
log.Printf("Updated state for %s: %s -> %s", entry.Id.String(), entry.State, newState)
entry.State = newState
}
entry.State = state.StateCompleted
} else {
return database.PaymentEntry{}, errors.New("invalid signature")
}
return entry, nil
}
func determineState(response StatusCheckResponse) state.PaymentState {
if response.Completed == "1" {
return state.StateCompleted
} else if response.Voided == "1" {
return state.StateVoided
} else if response.Refunded == "1" {
return state.StateVoided
} else if response.Authorized == "1" {
return state.StateAccepted
} else {
return state.StateInitialized
}
}
func (s *Service) CreatePaymentUrl(entry database.PaymentEntry) (database.PaymentEntry, string, error) {
return entry, "/wspay/initialize/" + entry.Id.String(), nil
}
func (s *Service) CompleteTransaction(entry database.PaymentEntry, amount int64) (database.PaymentEntry, error) {
@ -127,12 +173,12 @@ func (s *Service) InitializePayment(entry database.PaymentEntry) Form {
return form
}
func (s *Service) HandleSuccessResponse(c *gin.Context) (string, error) {
func (s *Service) HandleSuccessResponse(c *gin.Context, provider *database.PaymentEntryProvider) (string, error) {
response := FormReturn{}
if err := c.ShouldBind(&response); err != nil {
return "", err
}
entry, err := s.Provider.FetchById(uuid.MustParse(response.ShoppingCartID))
entry, err := provider.FetchById(uuid.MustParse(response.ShoppingCartID))
if err != nil {
return "", err
}
@ -148,19 +194,19 @@ func (s *Service) HandleSuccessResponse(c *gin.Context) (string, error) {
entry.ApprovalCode = &response.ApprovalCode
entry.State = state.StateAccepted
if _, err := s.Provider.UpdateEntry(entry); err != nil {
if _, err := provider.UpdateEntry(entry); err != nil {
return "", err
}
return "/entries/" + entry.Id.String(), nil
}
func (s *Service) HandleErrorResponse(c *gin.Context, paymentState state.PaymentState) (string, error) {
func (s *Service) HandleErrorResponse(c *gin.Context, provider *database.PaymentEntryProvider, paymentState state.PaymentState) (string, error) {
response := FormError{}
if err := c.ShouldBind(&response); err != nil {
return "", err
}
entry, err := s.Provider.FetchById(uuid.MustParse(response.ShoppingCartID))
entry, err := provider.FetchById(uuid.MustParse(response.ShoppingCartID))
if err != nil {
return "", err
}
@ -176,7 +222,7 @@ func (s *Service) HandleErrorResponse(c *gin.Context, paymentState state.Payment
entry.Error = &response.ErrorMessage
entry.State = paymentState
if _, err := s.Provider.UpdateEntry(entry); err != nil {
if _, err := provider.UpdateEntry(entry); err != nil {
return "", err
}
@ -268,6 +314,46 @@ func CompareCompletionReturnSignature(signature string, shopId string, secret st
}
}
func CompareStatusCheckReturnSignature(signature string, shopId string, secret string, actionSuccess string, approvalCode string, cartId string) error {
/**
Represents a signature created from string formatted from following values in a following order using
SHA512 algorithm:
ShopID
SecretKey
ActionSuccess
ApprovalCode
SecretKey
ShopID
ApprovalCode
WsPayOrderId
*/
calculatedSignature := shopId + secret + actionSuccess + approvalCode + secret + shopId + approvalCode + cartId
hash := sha512.New()
hash.Write([]byte(calculatedSignature))
if hex.EncodeToString(hash.Sum(nil)) == signature {
return nil
} else {
return errors.New("signature mismatch")
}
}
func CalculateStatusCheckSignature(shopId string, secret string, cartId string) string {
/**
Represents a signature created from string formatted from following values in a following order using
SHA512 algorithm:
ShopID
SecretKey
ShoppingCartID
SecretKey
ShopID
ShoppingCartID
*/
signature := shopId + secret + cartId + secret + shopId + cartId
hash := sha512.New()
hash.Write([]byte(signature))
return hex.EncodeToString(hash.Sum(nil))
}
func readResponse[T any](httpResponse *http.Response, response T) error {
if httpResponse.StatusCode == http.StatusOK {
content, err := io.ReadAll(httpResponse.Body)

12
wspay/wspay.go
View File

@ -130,14 +130,14 @@ type StatusCheckResponse struct {
ApprovalCode string
ShopID string
ShoppingCartID string
Amount string
Amount int64
CurrencyCode string
ActionSuccess string
Success string // deprecated
Authorized int
Completed int
Voided int
Refunded int
Authorized string
Completed string
Voided string
Refunded string
PaymentPlan string
Partner string
OnSite int
@ -151,7 +151,7 @@ type StatusCheckResponse struct {
CustomerCountry string
CustomerPhone string
CustomerEmail string
TransactionDateTime string //yyyymmddHHMMss
TransactionDateTime string // yyyymmddHHMMss
IsLessThan30DaysFromTransaction bool
CanBeCompleted bool
CanBeVoided bool