move more code

cmd/cart/pool-server.go

@@ -6,7 +6,6 @@ import (
 	"io"
 	"log"
 	"net/http"
-	"os"
 	"strconv"
 	"sync"
 	"time"
@@ -205,9 +204,9 @@ type AddRequest struct {
 }
 
 func (s *PoolServer) GetReservationTime(item *messages.AddItem) time.Duration {
-
+	// TODO: Implement reservation time calculation, nil don't require reservation
 	return time.Minute * 15
-	//return nil
+
 }
 
 func (s *PoolServer) AddSkuRequestHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
@@ -248,60 +247,6 @@ func (s *PoolServer) AddSkuRequestHandler(w http.ResponseWriter, r *http.Request
 // 	return json.NewEncoder(w).Encode(order)
 // }
 
-func getCurrency(country string) string {
-	if country == "no" {
-		return "NOK"
-	}
-	return "SEK"
-}
-
-func getLocale(country string) string {
-	if country == "no" {
-		return "nb-no"
-	}
-	return "sv-se"
-}
-
-func getLocationId(item *cart.CartItem) inventory.LocationID {
-	if item.StoreId == nil || *item.StoreId == "" {
-		return "se"
-	}
-	return inventory.LocationID(*item.StoreId)
-}
-
-func getInventoryRequests(items []*cart.CartItem) []inventory.ReserveRequest {
-	var requests []inventory.ReserveRequest
-	for _, item := range items {
-		if item == nil {
-			continue
-		}
-		requests = append(requests, inventory.ReserveRequest{
-			InventoryReference: &inventory.InventoryReference{
-				SKU:        inventory.SKU(item.Sku),
-				LocationID: getLocationId(item),
-			},
-			Quantity: uint32(item.Quantity),
-		})
-	}
-	return requests
-}
-
-func getOriginalHost(r *http.Request) string {
-	proxyHost := r.Header.Get("X-Forwarded-Host")
-	if proxyHost != "" {
-		return proxyHost
-	}
-	return r.Host
-}
-
-func getClientIp(r *http.Request) string {
-	ip := r.Header.Get("X-Forwarded-For")
-	if ip == "" {
-		ip = r.RemoteAddr
-	}
-	return ip
-}
-
 // func (s *PoolServer) HandleCheckout(w http.ResponseWriter, r *http.Request, id CartId) error {
 // 	klarnaOrder, err := s.CreateOrUpdateCheckout(r.Host, id)
 // 	if err != nil {
@@ -315,52 +260,6 @@ func getClientIp(r *http.Request) string {
 // }
 //
 
-func CookieCartIdHandler(fn func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error) func(w http.ResponseWriter, r *http.Request) {
-	return func(w http.ResponseWriter, r *http.Request) {
-
-		var id cart.CartId
-		cookie, err := r.Cookie("cartid")
-		if err != nil || cookie.Value == "" {
-			id = cart.MustNewCartId()
-			http.SetCookie(w, &http.Cookie{
-				Name:     "cartid",
-				Value:    id.String(),
-				Secure:   r.TLS != nil,
-				HttpOnly: true,
-				Path:     "/",
-				Expires:  time.Now().AddDate(0, 0, 14),
-				SameSite: http.SameSiteLaxMode,
-			})
-			w.Header().Set("Set-Cart-Id", id.String())
-		} else {
-			parsed, ok := cart.ParseCartId(cookie.Value)
-			if !ok {
-				id = cart.MustNewCartId()
-				http.SetCookie(w, &http.Cookie{
-					Name:     "cartid",
-					Value:    id.String(),
-					Secure:   r.TLS != nil,
-					HttpOnly: true,
-					Path:     "/",
-					Expires:  time.Now().AddDate(0, 0, 14),
-					SameSite: http.SameSiteLaxMode,
-				})
-				w.Header().Set("Set-Cart-Id", id.String())
-			} else {
-				id = parsed
-			}
-		}
-
-		err = fn(id, w, r)
-		if err != nil {
-			log.Printf("Server error, not remote error: %v\n", err)
-			w.WriteHeader(http.StatusInternalServerError)
-			w.Write([]byte(err.Error()))
-		}
-
-	}
-}
-
 // Removed leftover legacy block after CookieCartIdHandler (obsolete code referencing cid/legacy)
 
 func (s *PoolServer) RemoveCartCookie(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
@@ -378,34 +277,6 @@ func (s *PoolServer) RemoveCartCookie(w http.ResponseWriter, r *http.Request, ca
 	return nil
 }
 
-func CartIdHandler(fn func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error) func(w http.ResponseWriter, r *http.Request) {
-	return func(w http.ResponseWriter, r *http.Request) {
-		var id cart.CartId
-		raw := r.PathValue("id")
-		// If no id supplied, generate a new one
-		if raw == "" {
-			id := cart.MustNewCartId()
-			w.Header().Set("Set-Cart-Id", id.String())
-		} else {
-			// Parse base62 cart id
-			if parsedId, ok := cart.ParseCartId(raw); !ok {
-				w.WriteHeader(http.StatusBadRequest)
-				w.Write([]byte("cart id is invalid"))
-				return
-			} else {
-				id = parsedId
-			}
-		}
-
-		err := fn(id, w, r)
-		if err != nil {
-			log.Printf("Server error, not remote error: %v\n", err)
-			w.WriteHeader(http.StatusInternalServerError)
-			w.Write([]byte(err.Error()))
-		}
-	}
-}
-
 func (s *PoolServer) ProxyHandler(fn func(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error) func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error {
 	return func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error {
 		if ownerHost, ok := s.OwnerHost(uint64(cartId)); ok {
@@ -433,12 +304,9 @@ func (s *PoolServer) ProxyHandler(fn func(w http.ResponseWriter, r *http.Request
 
 var (
 	tracer     = otel.Tracer(name)
-	hmacKey    = os.Getenv("ADYEN_HMAC")
 	meter      = otel.Meter(name)
 	logger     = otelslog.NewLogger(name)
 	proxyCalls metric.Int64Counter
-
-// rollCnt metric.Int64Counter
 )
 
 func init() {

cmd/cart/utils.go

@@ -0,0 +1,138 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"time"
+
+	"git.k6n.net/go-cart-actor/pkg/cart"
+	"github.com/matst80/go-redis-inventory/pkg/inventory"
+)
+
+func getCurrency(country string) string {
+	if country == "no" {
+		return "NOK"
+	}
+	return "SEK"
+}
+
+func getLocale(country string) string {
+	if country == "no" {
+		return "nb-no"
+	}
+	return "sv-se"
+}
+
+func getLocationId(item *cart.CartItem) inventory.LocationID {
+	if item.StoreId == nil || *item.StoreId == "" {
+		return "se"
+	}
+	return inventory.LocationID(*item.StoreId)
+}
+
+func getInventoryRequests(items []*cart.CartItem) []inventory.ReserveRequest {
+	var requests []inventory.ReserveRequest
+	for _, item := range items {
+		if item == nil {
+			continue
+		}
+		requests = append(requests, inventory.ReserveRequest{
+			InventoryReference: &inventory.InventoryReference{
+				SKU:        inventory.SKU(item.Sku),
+				LocationID: getLocationId(item),
+			},
+			Quantity: uint32(item.Quantity),
+		})
+	}
+	return requests
+}
+
+func getOriginalHost(r *http.Request) string {
+	proxyHost := r.Header.Get("X-Forwarded-Host")
+	if proxyHost != "" {
+		return proxyHost
+	}
+	return r.Host
+}
+
+func getClientIp(r *http.Request) string {
+	ip := r.Header.Get("X-Forwarded-For")
+	if ip == "" {
+		ip = r.RemoteAddr
+	}
+	return ip
+}
+
+func CookieCartIdHandler(fn func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+
+		var id cart.CartId
+		cookie, err := r.Cookie("cartid")
+		if err != nil || cookie.Value == "" {
+			id = cart.MustNewCartId()
+			http.SetCookie(w, &http.Cookie{
+				Name:     "cartid",
+				Value:    id.String(),
+				Secure:   r.TLS != nil,
+				HttpOnly: true,
+				Path:     "/",
+				Expires:  time.Now().AddDate(0, 0, 14),
+				SameSite: http.SameSiteLaxMode,
+			})
+			w.Header().Set("Set-Cart-Id", id.String())
+		} else {
+			parsed, ok := cart.ParseCartId(cookie.Value)
+			if !ok {
+				id = cart.MustNewCartId()
+				http.SetCookie(w, &http.Cookie{
+					Name:     "cartid",
+					Value:    id.String(),
+					Secure:   r.TLS != nil,
+					HttpOnly: true,
+					Path:     "/",
+					Expires:  time.Now().AddDate(0, 0, 14),
+					SameSite: http.SameSiteLaxMode,
+				})
+				w.Header().Set("Set-Cart-Id", id.String())
+			} else {
+				id = parsed
+			}
+		}
+
+		err = fn(id, w, r)
+		if err != nil {
+			log.Printf("Server error, not remote error: %v\n", err)
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(err.Error()))
+		}
+
+	}
+}
+
+func CartIdHandler(fn func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		var id cart.CartId
+		raw := r.PathValue("id")
+		// If no id supplied, generate a new one
+		if raw == "" {
+			id := cart.MustNewCartId()
+			w.Header().Set("Set-Cart-Id", id.String())
+		} else {
+			// Parse base62 cart id
+			if parsedId, ok := cart.ParseCartId(raw); !ok {
+				w.WriteHeader(http.StatusBadRequest)
+				w.Write([]byte("cart id is invalid"))
+				return
+			} else {
+				id = parsedId
+			}
+		}
+
+		err := fn(id, w, r)
+		if err != nil {
+			log.Printf("Server error, not remote error: %v\n", err)
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(err.Error()))
+		}
+	}
+}

cmd/checkout/adyen-handlers.go

@@ -0,0 +1,220 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"net/url"
+
+	"git.k6n.net/go-cart-actor/pkg/actor"
+	"git.k6n.net/go-cart-actor/pkg/cart"
+	"git.k6n.net/go-cart-actor/pkg/proxy"
+	messages "git.k6n.net/go-cart-actor/proto/checkout"
+	adyenCheckout "github.com/adyen/adyen-go-api-library/v21/src/checkout"
+	"github.com/adyen/adyen-go-api-library/v21/src/common"
+	"github.com/adyen/adyen-go-api-library/v21/src/hmacvalidator"
+	"github.com/adyen/adyen-go-api-library/v21/src/webhook"
+	"github.com/google/uuid"
+)
+
+type SessionRequest struct {
+	SessionId     string `json:"sessionId"`
+	SessionResult string `json:"sessionResult"`
+	SessionData   string `json:"sessionData,omitempty"`
+}
+
+func (s *CheckoutPoolServer) AdyenSessionHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
+
+	grain, err := s.Get(r.Context(), uint64(cartId))
+	if err != nil {
+		return err
+	}
+	if r.Method == http.MethodGet {
+		meta := GetCheckoutMetaFromRequest(r)
+		sessionData, err := BuildAdyenCheckoutSession(grain, meta)
+		if err != nil {
+			return err
+		}
+		service := s.adyenClient.Checkout()
+		req := service.PaymentsApi.SessionsInput().CreateCheckoutSessionRequest(*sessionData)
+		res, _, err := service.PaymentsApi.Sessions(r.Context(), req)
+		// apply checkout started
+		if err != nil {
+			return err
+		}
+		return s.WriteResult(w, res)
+	} else {
+		payload := &SessionRequest{}
+		if err := json.NewDecoder(r.Body).Decode(payload); err != nil {
+			return err
+		}
+		service := s.adyenClient.Checkout()
+		req := service.PaymentsApi.GetResultOfPaymentSessionInput(payload.SessionId).SessionResult(payload.SessionResult)
+		res, _, err := service.PaymentsApi.GetResultOfPaymentSession(r.Context(), req)
+		if err != nil {
+			return err
+		}
+		return s.WriteResult(w, res)
+	}
+
+}
+
+func (s *CheckoutPoolServer) AdyenHookHandler(w http.ResponseWriter, r *http.Request) {
+	var notificationRequest webhook.Webhook
+	service := s.adyenClient.Checkout()
+	if err := json.NewDecoder(r.Body).Decode(&notificationRequest); err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+	cartHostMap := make(map[actor.Host][]webhook.NotificationItem)
+	for _, notificationItem := range *notificationRequest.NotificationItems {
+		item := notificationItem.NotificationRequestItem
+		log.Printf("Recieved notification event code: %s, %+v", item.EventCode, item)
+
+		isValid := hmacvalidator.ValidateHmac(item, hmacKey)
+		if !isValid {
+			log.Printf("notification hmac not valid %s, %v", item.EventCode, item)
+			http.Error(w, "Invalid HMAC", http.StatusUnauthorized)
+			return
+		} else {
+			switch item.EventCode {
+			case "CAPTURE":
+				log.Printf("Capture status: %v", item.Success)
+				// dataBytes, err := json.Marshal(item)
+				// if err != nil {
+				// 	log.Printf("error marshaling item: %v", err)
+				// 	http.Error(w, "Error marshaling item", http.StatusInternalServerError)
+				// 	return
+				// }
+				//s.ApplyAnywhere(r.Context(),0, &messages.PaymentEvent{PaymentId: item.PspReference, Success: item.Success, Name: item.EventCode, Data: &pbany.Any{Value: dataBytes}})
+			case "AUTHORISATION":
+
+				cartId, ok := cart.ParseCartId(item.MerchantReference)
+				if !ok {
+					log.Printf("invalid cart id %s", item.MerchantReference)
+					http.Error(w, "Invalid cart id", http.StatusBadRequest)
+					return
+				}
+				//s.Apply()
+
+				if host, ok := s.OwnerHost(uint64(cartId)); ok {
+					cartHostMap[host] = append(cartHostMap[host], notificationItem)
+					continue
+				}
+
+				grain, err := s.Get(r.Context(), uint64(cartId))
+				if err != nil {
+					log.Printf("Error getting cart: %v", err)
+					http.Error(w, "Cart not found", http.StatusBadRequest)
+					return
+				}
+				meta := GetCheckoutMetaFromRequest(r)
+				pspReference := item.PspReference
+				uid := uuid.New().String()
+				ref := uuid.New().String()
+				req := service.ModificationsApi.CaptureAuthorisedPaymentInput(pspReference).IdempotencyKey(uid).PaymentCaptureRequest(adyenCheckout.PaymentCaptureRequest{
+					Amount: adyenCheckout.Amount{
+						Currency: meta.Currency,
+						Value:    grain.CartTotalPrice.IncVat,
+					},
+					MerchantAccount: "ElgigantenECOM",
+					Reference:       &ref,
+				})
+				res, _, err := service.ModificationsApi.CaptureAuthorisedPayment(r.Context(), req)
+				if err != nil {
+					log.Printf("Error capturing payment: %v", err)
+				} else {
+					log.Printf("Payment captured successfully: %+v", res)
+					s.Apply(r.Context(), uint64(cartId), &messages.OrderCreated{
+						OrderId: res.PaymentPspReference,
+						Status:  item.EventCode,
+					})
+				}
+			default:
+				log.Printf("Unknown event code: %s", item.EventCode)
+			}
+		}
+	}
+	var failed bool = false
+	var lastMock *proxy.MockResponseWriter
+	for host, items := range cartHostMap {
+		notificationRequest.NotificationItems = &items
+		bodyBytes, err := json.Marshal(notificationRequest)
+		if err != nil {
+			log.Printf("error marshaling notification: %+v", err)
+			continue
+		}
+		customBody := bytes.NewReader(bodyBytes)
+		mockW := proxy.NewMockResponseWriter()
+		handled, err := host.Proxy(0, mockW, r, customBody)
+		if err != nil {
+			log.Printf("proxy failed for %s: %+v", host.Name(), err)
+			failed = true
+			lastMock = mockW
+		} else if handled {
+			log.Printf("notification proxied to %s", host.Name())
+		}
+	}
+	if failed {
+		w.WriteHeader(lastMock.StatusCode)
+		w.Write(lastMock.Body.Bytes())
+	} else {
+		w.WriteHeader(http.StatusAccepted)
+	}
+}
+
+func (s *CheckoutPoolServer) AdyenReturnHandler(w http.ResponseWriter, r *http.Request) {
+	log.Println("Redirect received")
+
+	service := s.adyenClient.Checkout()
+
+	req := service.PaymentsApi.GetResultOfPaymentSessionInput(r.URL.Query().Get("sessionId"))
+
+	res, httpRes, err := service.PaymentsApi.GetResultOfPaymentSession(r.Context(), req)
+	log.Printf("got payment session %+v", res)
+
+	dreq := service.PaymentsApi.PaymentsDetailsInput()
+	dreq = dreq.PaymentDetailsRequest(adyenCheckout.PaymentDetailsRequest{
+		Details: adyenCheckout.PaymentCompletionDetails{
+			RedirectResult: common.PtrString(r.URL.Query().Get("redirectResult")),
+			Payload:        common.PtrString(r.URL.Query().Get("payload")),
+		},
+	})
+
+	dres, httpRes, err := service.PaymentsApi.PaymentsDetails(r.Context(), dreq)
+
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	log.Printf("Payment details response: %+v", dres)
+
+	if !common.IsNil(dres.PspReference) && *dres.PspReference != "" {
+		var redirectURL string
+		// Conditionally handle different result codes for the shopper
+		switch *dres.ResultCode {
+		case "Authorised":
+			redirectURL = "/result/success"
+		case "Pending", "Received":
+			redirectURL = "/result/pending"
+		case "Refused":
+			redirectURL = "/result/failed"
+		default:
+			reason := ""
+			if dres.RefusalReason != nil {
+				reason = *dres.RefusalReason
+			} else {
+				reason = *dres.ResultCode
+			}
+			log.Printf("Payment failed: %s", reason)
+			redirectURL = fmt.Sprintf("/result/error?reason=%s", url.QueryEscape(reason))
+		}
+		http.Redirect(w, r, redirectURL, http.StatusFound)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(httpRes.StatusCode)
+	json.NewEncoder(w).Encode(httpRes.Status)
+}

cmd/checkout/checkout_server.go

@@ -1,226 +0,0 @@
-package main
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"log"
-	"net/http"
-	"time"
-
-	"git.k6n.net/go-cart-actor/pkg/cart"
-	"git.k6n.net/go-cart-actor/pkg/checkout"
-	messages "git.k6n.net/go-cart-actor/proto/checkout"
-
-	"github.com/matst80/go-redis-inventory/pkg/inventory"
-	amqp "github.com/rabbitmq/amqp091-go"
-)
-
-var tpl = `<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>s10r testing - checkout</title>
-  </head>
-
-  <body>
-    %s
-  </body>
-</html>
-`
-
-func getLocationId(item *cart.CartItem) inventory.LocationID {
-	if item.StoreId == nil || *item.StoreId == "" {
-		return "se"
-	}
-	return inventory.LocationID(*item.StoreId)
-}
-
-func getInventoryRequests(items []*cart.CartItem) []inventory.ReserveRequest {
-	var requests []inventory.ReserveRequest
-	for _, item := range items {
-		if item == nil {
-			continue
-		}
-		requests = append(requests, inventory.ReserveRequest{
-			InventoryReference: &inventory.InventoryReference{
-				SKU:        inventory.SKU(item.Sku),
-				LocationID: getLocationId(item),
-			},
-			Quantity: uint32(item.Quantity),
-		})
-	}
-	return requests
-}
-
-func (a *App) getGrainFromOrder(ctx context.Context, order *CheckoutOrder) (*checkout.CheckoutGrain, error) {
-	cartId, ok := cart.ParseCartId(order.MerchantReference1)
-	if !ok {
-		return nil, fmt.Errorf("invalid cart id in order reference: %s", order.MerchantReference1)
-	}
-	grain, err := a.pool.Get(ctx, uint64(cartId))
-	if err != nil {
-		return nil, fmt.Errorf("failed to get cart grain: %w", err)
-	}
-	return grain, nil
-}
-
-func (a *App) HandleCheckoutRequests(amqpUrl string, mux *http.ServeMux, inventoryService inventory.InventoryService) {
-	conn, err := amqp.Dial(amqpUrl)
-	if err != nil {
-		log.Fatalf("failed to connect to RabbitMQ: %v", err)
-	}
-
-	orderHandler := NewAmqpOrderHandler(conn)
-	orderHandler.DefineQueue()
-
-	mux.HandleFunc("/push", func(w http.ResponseWriter, r *http.Request) {
-		log.Printf("Klarna order confirmation push, method: %s", r.Method)
-		if r.Method != http.MethodPost {
-			w.WriteHeader(http.StatusMethodNotAllowed)
-			return
-		}
-		orderId := r.URL.Query().Get("order_id")
-		log.Printf("Order confirmation push: %s", orderId)
-
-		order, err := a.klarnaClient.GetOrder(r.Context(), orderId)
-
-		if err != nil {
-			log.Printf("Error creating request: %v\n", err)
-			w.WriteHeader(http.StatusInternalServerError)
-			return
-		}
-
-		grain, err := a.getGrainFromOrder(r.Context(), order)
-		if err != nil {
-			logger.ErrorContext(r.Context(), "Unable to get grain from klarna order", "error", err.Error())
-			w.WriteHeader(http.StatusInternalServerError)
-			return
-		}
-
-		if inventoryService != nil {
-			inventoryRequests := getInventoryRequests(grain.CartState.Items)
-			err = inventoryService.ReserveInventory(r.Context(), inventoryRequests...)
-
-			if err != nil {
-				logger.WarnContext(r.Context(), "placeorder inventory reservation failed")
-				w.WriteHeader(http.StatusNotAcceptable)
-				return
-			}
-			a.pool.Apply(r.Context(), uint64(grain.Id), &messages.InventoryReserved{
-				Id:     grain.Id.String(),
-				Status: "success",
-			})
-		}
-
-		// err = confirmOrder(r.Context(), order, orderHandler)
-		// if err != nil {
-		// 	log.Printf("Error confirming order: %v\n", err)
-		// 	w.WriteHeader(http.StatusInternalServerError)
-		// 	return
-		// }
-
-		// err = triggerOrderCompleted(r.Context(), a.server, order)
-		// if err != nil {
-		// 	log.Printf("Error processing cart message: %v\n", err)
-		// 	w.WriteHeader(http.StatusInternalServerError)
-		// 	return
-		// }
-		err = a.klarnaClient.AcknowledgeOrder(r.Context(), orderId)
-		if err != nil {
-			log.Printf("Error acknowledging order: %v\n", err)
-		}
-
-		w.WriteHeader(http.StatusOK)
-	})
-
-	mux.HandleFunc("GET /checkout", a.server.CheckoutHandler(func(order *CheckoutOrder, w http.ResponseWriter) error {
-		w.Header().Set("Content-Type", "text/html; charset=utf-8")
-		w.Header().Set("Permissions-Policy", "payment=(self \"https://js.stripe.com\" \"https://m.stripe.network\" \"https://js.playground.kustom.co\")")
-		w.WriteHeader(http.StatusOK)
-		_, err := fmt.Fprintf(w, tpl, order.HTMLSnippet)
-		return err
-	}))
-
-	mux.HandleFunc("GET /confirmation/{order_id}", func(w http.ResponseWriter, r *http.Request) {
-
-		orderId := r.PathValue("order_id")
-		order, err := a.klarnaClient.GetOrder(r.Context(), orderId)
-
-		if err != nil {
-			w.WriteHeader(http.StatusInternalServerError)
-			w.Write([]byte(err.Error()))
-			return
-		}
-
-		// Apply ConfirmationViewed mutation
-		cartId, ok := cart.ParseCartId(order.MerchantReference1)
-		if ok {
-			a.pool.Apply(r.Context(), uint64(cartId), &messages.ConfirmationViewed{})
-		}
-
-		w.Header().Set("Content-Type", "text/html; charset=utf-8")
-		if order.Status == "checkout_complete" {
-			http.SetCookie(w, &http.Cookie{
-				Name:     "cartid",
-				Value:    "",
-				Path:     "/",
-				Secure:   true,
-				HttpOnly: true,
-				Expires:  time.Unix(0, 0),
-				SameSite: http.SameSiteLaxMode,
-			})
-		}
-
-		w.WriteHeader(http.StatusOK)
-		fmt.Fprintf(w, tpl, order.HTMLSnippet)
-	})
-	mux.HandleFunc("/notification", func(w http.ResponseWriter, r *http.Request) {
-		log.Printf("Klarna order notification, method: %s", r.Method)
-		logger.InfoContext(r.Context(), "Klarna order notification received", "method", r.Method)
-		if r.Method != "POST" {
-			w.WriteHeader(http.StatusMethodNotAllowed)
-			return
-		}
-		order := &CheckoutOrder{}
-		err := json.NewDecoder(r.Body).Decode(order)
-		if err != nil {
-			w.WriteHeader(http.StatusBadRequest)
-		}
-		log.Printf("Klarna order notification: %s", order.ID)
-		logger.InfoContext(r.Context(), "Klarna order notification received", "order_id", order.ID)
-
-		w.WriteHeader(http.StatusOK)
-	})
-	mux.HandleFunc("POST /validate", func(w http.ResponseWriter, r *http.Request) {
-		log.Printf("Klarna order validation, method: %s", r.Method)
-		if r.Method != "POST" {
-			w.WriteHeader(http.StatusMethodNotAllowed)
-			return
-		}
-		order := &CheckoutOrder{}
-		err := json.NewDecoder(r.Body).Decode(order)
-		if err != nil {
-			w.WriteHeader(http.StatusBadRequest)
-		}
-		logger.InfoContext(r.Context(), "Klarna order validation received", "order_id", order.ID, "cart_id", order.MerchantReference1)
-		grain, err := a.getGrainFromOrder(r.Context(), order)
-		if err != nil {
-			logger.ErrorContext(r.Context(), "Unable to get grain from klarna order", "error", err.Error())
-			w.WriteHeader(http.StatusInternalServerError)
-			return
-		}
-		if inventoryService != nil {
-			inventoryRequests := getInventoryRequests(grain.CartState.Items)
-			_, err = inventoryService.ReservationCheck(r.Context(), inventoryRequests...)
-			if err != nil {
-				logger.WarnContext(r.Context(), "placeorder inventory check failed")
-				w.WriteHeader(http.StatusNotAcceptable)
-				return
-			}
-		}
-
-		w.WriteHeader(http.StatusOK)
-	})
-}

cmd/checkout/klarna-handlers.go

@@ -0,0 +1,168 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+
+	"git.k6n.net/go-cart-actor/pkg/cart"
+	"git.k6n.net/go-cart-actor/pkg/checkout"
+	messages "git.k6n.net/go-cart-actor/proto/checkout"
+	"github.com/matst80/go-redis-inventory/pkg/inventory"
+)
+
+func (s *CheckoutPoolServer) KlarnaValidationHandler(w http.ResponseWriter, r *http.Request) {
+	log.Printf("Klarna order validation, method: %s", r.Method)
+	if r.Method != "POST" {
+		w.WriteHeader(http.StatusMethodNotAllowed)
+		return
+	}
+	order := &CheckoutOrder{}
+	err := json.NewDecoder(r.Body).Decode(order)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+	}
+	logger.InfoContext(r.Context(), "Klarna order validation received", "order_id", order.ID, "cart_id", order.MerchantReference1)
+	grain, err := s.getGrainFromKlarnaOrder(r.Context(), order)
+	if err != nil {
+		logger.ErrorContext(r.Context(), "Unable to get grain from klarna order", "error", err.Error())
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	s.reserveInventory(r.Context(), grain)
+
+	w.WriteHeader(http.StatusOK)
+
+}
+
+func (s *CheckoutPoolServer) KlarnaNotificationHandler(w http.ResponseWriter, r *http.Request) {
+
+	log.Printf("Klarna order notification, method: %s", r.Method)
+	logger.InfoContext(r.Context(), "Klarna order notification received", "method", r.Method)
+	if r.Method != "POST" {
+		w.WriteHeader(http.StatusMethodNotAllowed)
+		return
+	}
+	order := &CheckoutOrder{}
+	err := json.NewDecoder(r.Body).Decode(order)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+	}
+	log.Printf("Klarna order notification: %s", order.ID)
+	logger.InfoContext(r.Context(), "Klarna order notification received", "order_id", order.ID)
+
+	w.WriteHeader(http.StatusOK)
+
+}
+
+func (s *CheckoutPoolServer) KlarnaPushHandler(w http.ResponseWriter, r *http.Request) {
+	log.Printf("Klarna order confirmation push, method: %s", r.Method)
+	if r.Method != http.MethodPost {
+		w.WriteHeader(http.StatusMethodNotAllowed)
+		return
+	}
+	orderId := r.URL.Query().Get("order_id")
+	log.Printf("Order confirmation push: %s", orderId)
+
+	order, err := s.klarnaClient.GetOrder(r.Context(), orderId)
+
+	if err != nil {
+		log.Printf("Error creating request: %v\n", err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	grain, err := s.getGrainFromKlarnaOrder(r.Context(), order)
+	if err != nil {
+		logger.ErrorContext(r.Context(), "Unable to get grain from klarna order", "error", err.Error())
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	if s.inventoryService != nil {
+		inventoryRequests := getInventoryRequests(grain.CartState.Items)
+		err = s.inventoryService.ReserveInventory(r.Context(), inventoryRequests...)
+
+		if err != nil {
+			logger.WarnContext(r.Context(), "placeorder inventory reservation failed")
+			w.WriteHeader(http.StatusNotAcceptable)
+			return
+		}
+		s.Apply(r.Context(), uint64(grain.Id), &messages.InventoryReserved{
+			Id:     grain.Id.String(),
+			Status: "success",
+		})
+	}
+
+	// err = confirmOrder(r.Context(), order, orderHandler)
+	// if err != nil {
+	// 	log.Printf("Error confirming order: %v\n", err)
+	// 	w.WriteHeader(http.StatusInternalServerError)
+	// 	return
+	// }
+
+	// err = triggerOrderCompleted(r.Context(), a.server, order)
+	// if err != nil {
+	// 	log.Printf("Error processing cart message: %v\n", err)
+	// 	w.WriteHeader(http.StatusInternalServerError)
+	// 	return
+	// }
+	err = s.klarnaClient.AcknowledgeOrder(r.Context(), orderId)
+	if err != nil {
+		log.Printf("Error acknowledging order: %v\n", err)
+	}
+
+	w.WriteHeader(http.StatusOK)
+}
+
+var tpl = `<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>s10r testing - checkout</title>
+  </head>
+
+  <body>
+    %s
+  </body>
+</html>
+`
+
+func getLocationId(item *cart.CartItem) inventory.LocationID {
+	if item.StoreId == nil || *item.StoreId == "" {
+		return "se"
+	}
+	return inventory.LocationID(*item.StoreId)
+}
+
+func getInventoryRequests(items []*cart.CartItem) []inventory.ReserveRequest {
+	var requests []inventory.ReserveRequest
+	for _, item := range items {
+		if item == nil {
+			continue
+		}
+		requests = append(requests, inventory.ReserveRequest{
+			InventoryReference: &inventory.InventoryReference{
+				SKU:        inventory.SKU(item.Sku),
+				LocationID: getLocationId(item),
+			},
+			Quantity: uint32(item.Quantity),
+		})
+	}
+	return requests
+}
+
+func (a *CheckoutPoolServer) getGrainFromKlarnaOrder(ctx context.Context, order *CheckoutOrder) (*checkout.CheckoutGrain, error) {
+	cartId, ok := cart.ParseCartId(order.MerchantReference1)
+	if !ok {
+		return nil, fmt.Errorf("invalid cart id in order reference: %s", order.MerchantReference1)
+	}
+	grain, err := a.Get(ctx, uint64(cartId))
+	if err != nil {
+		return nil, fmt.Errorf("failed to get cart grain: %w", err)
+	}
+	return grain, nil
+}

cmd/checkout/main.go

@@ -107,21 +107,13 @@ func main() {
 	cartClient := NewCartClient(cartInternalUrl)
 
 	syncedServer := NewCheckoutPoolServer(pool, fmt.Sprintf("%s, %s", name, podIp), klarnaClient, cartClient, adyenClient)
-
+	syncedServer.inventoryService = inventoryService
-	app := &App{
-		pool:         pool,
-		server:       syncedServer,
-		klarnaClient: klarnaClient,
-		cartClient:   cartClient,
-	}
 
 	mux := http.NewServeMux()
 	debugMux := http.NewServeMux()
 
 	if amqpUrl == "" {
-		log.Printf("no connection to amqp defined")
+		log.Fatalf("no connection to amqp defined")
-	} else {
-		app.HandleCheckoutRequests(amqpUrl, mux, inventoryService)
 	}
 
 	grpcSrv, err := actor.NewControlServer[*checkout.CheckoutGrain](controlPlaneConfig, pool)
@@ -143,7 +135,7 @@ func main() {
 	syncedServer.Serve(mux)
 
 	mux.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
-		grainCount, capacity := app.pool.LocalUsage()
+		grainCount, capacity := pool.LocalUsage()
 		if grainCount >= capacity {
 			w.WriteHeader(http.StatusInternalServerError)
 			w.Write([]byte("grain pool at capacity"))

cmd/checkout/pool-server.go

@@ -7,22 +7,17 @@ import (
 	"fmt"
 	"log"
 	"net/http"
-	"net/url"
 	"os"
 	"time"
 
 	"git.k6n.net/go-cart-actor/pkg/actor"
 	"git.k6n.net/go-cart-actor/pkg/cart"
 	"git.k6n.net/go-cart-actor/pkg/checkout"
-	"git.k6n.net/go-cart-actor/pkg/proxy"
 	messages "git.k6n.net/go-cart-actor/proto/checkout"
 
 	adyen "github.com/adyen/adyen-go-api-library/v21/src/adyen"
-	adyenCheckout "github.com/adyen/adyen-go-api-library/v21/src/checkout"
+	"github.com/matst80/go-redis-inventory/pkg/inventory"
-	"github.com/adyen/adyen-go-api-library/v21/src/common"
+	amqp "github.com/rabbitmq/amqp091-go"
-	"github.com/adyen/adyen-go-api-library/v21/src/hmacvalidator"
-	"github.com/adyen/adyen-go-api-library/v21/src/webhook"
-	"github.com/google/uuid"
 
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
@@ -54,6 +49,7 @@ type CheckoutPoolServer struct {
 	klarnaClient     *KlarnaClient
 	adyenClient      *adyen.APIClient
 	cartClient       *CartClient
+	inventoryService *inventory.RedisInventoryService
 }
 
 func NewCheckoutPoolServer(pool actor.GrainPool[*checkout.CheckoutGrain], pod_name string, klarnaClient *KlarnaClient, cartClient *CartClient, adyenClient *adyen.APIClient) *CheckoutPoolServer {
@@ -156,56 +152,6 @@ func (s *CheckoutPoolServer) CheckoutHandler(fn func(order *CheckoutOrder, w htt
 	}))
 }
 
-func CheckoutIdHandler(fn func(checkoutId checkout.CheckoutId, w http.ResponseWriter, r *http.Request) error) func(w http.ResponseWriter, r *http.Request) {
-	return func(w http.ResponseWriter, r *http.Request) {
-		var id checkout.CheckoutId
-		raw := r.PathValue("id")
-		if raw == "" {
-			id = checkout.CheckoutId(cart.MustNewCartId())
-			w.Header().Set("Set-Checkout-Id", id.String())
-		} else {
-			if parsedId, ok := cart.ParseCartId(raw); !ok {
-				w.WriteHeader(http.StatusBadRequest)
-				w.Write([]byte("checkout id is invalid"))
-				return
-			} else {
-				id = checkout.CheckoutId(parsedId)
-			}
-		}
-
-		err := fn(id, w, r)
-		if err != nil {
-			log.Printf("Server error, not remote error: %v\n", err)
-			w.WriteHeader(http.StatusInternalServerError)
-			w.Write([]byte(err.Error()))
-		}
-	}
-}
-
-func (s *CheckoutPoolServer) ProxyHandler(fn func(w http.ResponseWriter, r *http.Request, checkoutId checkout.CheckoutId) error) func(checkoutId checkout.CheckoutId, w http.ResponseWriter, r *http.Request) error {
-	return func(checkoutId checkout.CheckoutId, w http.ResponseWriter, r *http.Request) error {
-		if ownerHost, ok := s.OwnerHost(uint64(checkoutId)); ok {
-			ctx, span := tracer.Start(r.Context(), "proxy")
-			defer span.End()
-			span.SetAttributes(attribute.String("checkoutid", checkoutId.String()))
-			hostAttr := attribute.String("other host", ownerHost.Name())
-			span.SetAttributes(hostAttr)
-			logger.InfoContext(ctx, "checkout proxyed", "result", ownerHost.Name())
-			proxyCalls.Add(ctx, 1, metric.WithAttributes(hostAttr))
-			handled, err := ownerHost.Proxy(uint64(checkoutId), w, r, nil)
-
-			grainLookups.Inc()
-			if err == nil && handled {
-				return nil
-			}
-		}
-		_, span := tracer.Start(r.Context(), "own")
-		span.SetAttributes(attribute.String("checkoutid", checkoutId.String()))
-		defer span.End()
-		return fn(w, r, checkoutId)
-	}
-}
-
 var (
 	tracer     = otel.Tracer(name)
 	hmacKey    = os.Getenv("ADYEN_HMAC")
@@ -224,206 +170,6 @@ func init() {
 	}
 }
 
-type SessionRequest struct {
-	SessionId     string `json:"sessionId"`
-	SessionResult string `json:"sessionResult"`
-	SessionData   string `json:"sessionData,omitempty"`
-}
-
-func (s *CheckoutPoolServer) AdyenSessionHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
-
-	grain, err := s.Get(r.Context(), uint64(cartId))
-	if err != nil {
-		return err
-	}
-	if r.Method == http.MethodGet {
-		meta := GetCheckoutMetaFromRequest(r)
-		sessionData, err := BuildAdyenCheckoutSession(grain, meta)
-		if err != nil {
-			return err
-		}
-		service := s.adyenClient.Checkout()
-		req := service.PaymentsApi.SessionsInput().CreateCheckoutSessionRequest(*sessionData)
-		res, _, err := service.PaymentsApi.Sessions(r.Context(), req)
-		// apply checkout started
-		if err != nil {
-			return err
-		}
-		return s.WriteResult(w, res)
-	} else {
-		payload := &SessionRequest{}
-		if err := json.NewDecoder(r.Body).Decode(payload); err != nil {
-			return err
-		}
-		service := s.adyenClient.Checkout()
-		req := service.PaymentsApi.GetResultOfPaymentSessionInput(payload.SessionId).SessionResult(payload.SessionResult)
-		res, _, err := service.PaymentsApi.GetResultOfPaymentSession(r.Context(), req)
-		if err != nil {
-			return err
-		}
-		return s.WriteResult(w, res)
-	}
-
-}
-
-func (s *CheckoutPoolServer) AdyenHookHandler(w http.ResponseWriter, r *http.Request) {
-	var notificationRequest webhook.Webhook
-	service := s.adyenClient.Checkout()
-	if err := json.NewDecoder(r.Body).Decode(&notificationRequest); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
-		return
-	}
-	cartHostMap := make(map[actor.Host][]webhook.NotificationItem)
-	for _, notificationItem := range *notificationRequest.NotificationItems {
-		item := notificationItem.NotificationRequestItem
-		log.Printf("Recieved notification event code: %s, %+v", item.EventCode, item)
-
-		isValid := hmacvalidator.ValidateHmac(item, hmacKey)
-		if !isValid {
-			log.Printf("notification hmac not valid %s, %v", item.EventCode, item)
-			http.Error(w, "Invalid HMAC", http.StatusUnauthorized)
-			return
-		} else {
-			switch item.EventCode {
-			case "CAPTURE":
-				log.Printf("Capture status: %v", item.Success)
-				// dataBytes, err := json.Marshal(item)
-				// if err != nil {
-				// 	log.Printf("error marshaling item: %v", err)
-				// 	http.Error(w, "Error marshaling item", http.StatusInternalServerError)
-				// 	return
-				// }
-				//s.ApplyAnywhere(r.Context(),0, &messages.PaymentEvent{PaymentId: item.PspReference, Success: item.Success, Name: item.EventCode, Data: &pbany.Any{Value: dataBytes}})
-			case "AUTHORISATION":
-
-				cartId, ok := cart.ParseCartId(item.MerchantReference)
-				if !ok {
-					log.Printf("invalid cart id %s", item.MerchantReference)
-					http.Error(w, "Invalid cart id", http.StatusBadRequest)
-					return
-				}
-				//s.Apply()
-
-				if host, ok := s.OwnerHost(uint64(cartId)); ok {
-					cartHostMap[host] = append(cartHostMap[host], notificationItem)
-					continue
-				}
-
-				grain, err := s.Get(r.Context(), uint64(cartId))
-				if err != nil {
-					log.Printf("Error getting cart: %v", err)
-					http.Error(w, "Cart not found", http.StatusBadRequest)
-					return
-				}
-				meta := GetCheckoutMetaFromRequest(r)
-				pspReference := item.PspReference
-				uid := uuid.New().String()
-				ref := uuid.New().String()
-				req := service.ModificationsApi.CaptureAuthorisedPaymentInput(pspReference).IdempotencyKey(uid).PaymentCaptureRequest(adyenCheckout.PaymentCaptureRequest{
-					Amount: adyenCheckout.Amount{
-						Currency: meta.Currency,
-						Value:    grain.CartTotalPrice.IncVat,
-					},
-					MerchantAccount: "ElgigantenECOM",
-					Reference:       &ref,
-				})
-				res, _, err := service.ModificationsApi.CaptureAuthorisedPayment(r.Context(), req)
-				if err != nil {
-					log.Printf("Error capturing payment: %v", err)
-				} else {
-					log.Printf("Payment captured successfully: %+v", res)
-					s.Apply(r.Context(), uint64(cartId), &messages.OrderCreated{
-						OrderId: res.PaymentPspReference,
-						Status:  item.EventCode,
-					})
-				}
-			default:
-				log.Printf("Unknown event code: %s", item.EventCode)
-			}
-		}
-	}
-	var failed bool = false
-	var lastMock *proxy.MockResponseWriter
-	for host, items := range cartHostMap {
-		notificationRequest.NotificationItems = &items
-		bodyBytes, err := json.Marshal(notificationRequest)
-		if err != nil {
-			log.Printf("error marshaling notification: %+v", err)
-			continue
-		}
-		customBody := bytes.NewReader(bodyBytes)
-		mockW := proxy.NewMockResponseWriter()
-		handled, err := host.Proxy(0, mockW, r, customBody)
-		if err != nil {
-			log.Printf("proxy failed for %s: %+v", host.Name(), err)
-			failed = true
-			lastMock = mockW
-		} else if handled {
-			log.Printf("notification proxied to %s", host.Name())
-		}
-	}
-	if failed {
-		w.WriteHeader(lastMock.StatusCode)
-		w.Write(lastMock.Body.Bytes())
-	} else {
-		w.WriteHeader(http.StatusAccepted)
-	}
-}
-
-func (s *CheckoutPoolServer) AdyenReturnHandler(w http.ResponseWriter, r *http.Request) {
-	log.Println("Redirect received")
-
-	service := s.adyenClient.Checkout()
-
-	req := service.PaymentsApi.GetResultOfPaymentSessionInput(r.URL.Query().Get("sessionId"))
-
-	res, httpRes, err := service.PaymentsApi.GetResultOfPaymentSession(r.Context(), req)
-	log.Printf("got payment session %+v", res)
-
-	dreq := service.PaymentsApi.PaymentsDetailsInput()
-	dreq = dreq.PaymentDetailsRequest(adyenCheckout.PaymentDetailsRequest{
-		Details: adyenCheckout.PaymentCompletionDetails{
-			RedirectResult: common.PtrString(r.URL.Query().Get("redirectResult")),
-			Payload:        common.PtrString(r.URL.Query().Get("payload")),
-		},
-	})
-
-	dres, httpRes, err := service.PaymentsApi.PaymentsDetails(r.Context(), dreq)
-
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-		return
-	}
-	log.Printf("Payment details response: %+v", dres)
-
-	if !common.IsNil(dres.PspReference) && *dres.PspReference != "" {
-		var redirectURL string
-		// Conditionally handle different result codes for the shopper
-		switch *dres.ResultCode {
-		case "Authorised":
-			redirectURL = "/result/success"
-		case "Pending", "Received":
-			redirectURL = "/result/pending"
-		case "Refused":
-			redirectURL = "/result/failed"
-		default:
-			reason := ""
-			if dres.RefusalReason != nil {
-				reason = *dres.RefusalReason
-			} else {
-				reason = *dres.ResultCode
-			}
-			log.Printf("Payment failed: %s", reason)
-			redirectURL = fmt.Sprintf("/result/error?reason=%s", url.QueryEscape(reason))
-		}
-		http.Redirect(w, r, redirectURL, http.StatusFound)
-		return
-	}
-	w.Header().Set("Content-Type", "application/json")
-	w.WriteHeader(httpRes.StatusCode)
-	json.NewEncoder(w).Encode(httpRes.Status)
-}
-
 func (s *CheckoutPoolServer) Serve(mux *http.ServeMux) {
 	handleFunc := func(pattern string, handlerFunc func(http.ResponseWriter, *http.Request)) {
 		attr := attribute.String("http.route", pattern)
@@ -438,9 +184,63 @@ func (s *CheckoutPoolServer) Serve(mux *http.ServeMux) {
 			handlerFunc(w, r)
 		}))
 	}
+	handleFunc("/payment/adyen/session", s.AdyenSessionHandler)
+	handleFunc("/payment/adyen/push", s.AdyenHookHandler)
+	handleFunc("/payment/adyen/return", s.AdyenReturnHandler)
+	//handleFunc("/payment/adyen/cancel", s.AdyenCancelHandler)
 
-	handleFunc("/adyen_hook", s.AdyenHookHandler)
+	handleFunc("/payment/klarna/validate", s.KlarnaValidationHandler)
-	handleFunc("/adyen-return", s.AdyenReturnHandler)
+	handleFunc("/payment/klarna/notification", s.KlarnaNotificationHandler)
+
+	conn, err := amqp.Dial(amqpUrl)
+	if err != nil {
+		log.Fatalf("failed to connect to RabbitMQ: %v", err)
+	}
+
+	orderHandler := NewAmqpOrderHandler(conn)
+	orderHandler.DefineQueue()
+
+	mux.HandleFunc("GET /checkout", s.CheckoutHandler(func(order *CheckoutOrder, w http.ResponseWriter) error {
+		w.Header().Set("Content-Type", "text/html; charset=utf-8")
+		w.Header().Set("Permissions-Policy", "payment=(self \"https://js.stripe.com\" \"https://m.stripe.network\" \"https://js.playground.kustom.co\")")
+		w.WriteHeader(http.StatusOK)
+		_, err := fmt.Fprintf(w, tpl, order.HTMLSnippet)
+		return err
+	}))
+
+	mux.HandleFunc("GET /confirmation/{order_id}", func(w http.ResponseWriter, r *http.Request) {
+
+		orderId := r.PathValue("order_id")
+		order, err := s.klarnaClient.GetOrder(r.Context(), orderId)
+
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(err.Error()))
+			return
+		}
+
+		// Apply ConfirmationViewed mutation
+		cartId, ok := cart.ParseCartId(order.MerchantReference1)
+		if ok {
+			a.Apply(r.Context(), uint64(cartId), &messages.ConfirmationViewed{})
+		}
+
+		w.Header().Set("Content-Type", "text/html; charset=utf-8")
+		if order.Status == "checkout_complete" {
+			http.SetCookie(w, &http.Cookie{
+				Name:     "cartid",
+				Value:    "",
+				Path:     "/",
+				Secure:   true,
+				HttpOnly: true,
+				Expires:  time.Unix(0, 0),
+				SameSite: http.SameSiteLaxMode,
+			})
+		}
+
+		w.WriteHeader(http.StatusOK)
+		fmt.Fprintf(w, tpl, order.HTMLSnippet)
+	})
 
 	handleFunc("GET /checkout", s.CheckoutHandler(func(order *CheckoutOrder, w http.ResponseWriter) error {
 		w.Header().Set("Content-Type", "text/html; charset=utf-8")

cmd/checkout/utils.go

@@ -1,8 +1,15 @@
 package main
 
 import (
+	"context"
+	"log"
 	"net/http"
 	"strings"
+
+	"git.k6n.net/go-cart-actor/pkg/cart"
+	"git.k6n.net/go-cart-actor/pkg/checkout"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/metric"
 )
 
 func getOriginalHost(r *http.Request) string {
@@ -44,3 +51,65 @@ func getCountryFromHost(host string) string {
 	}
 	return ""
 }
+
+func (a *CheckoutPoolServer) reserveInventory(ctx context.Context, grain *checkout.CheckoutGrain) error {
+	if a.inventoryService != nil {
+		inventoryRequests := getInventoryRequests(grain.CartState.Items)
+		_, err := a.inventoryService.ReservationCheck(ctx, inventoryRequests...)
+		if err != nil {
+			logger.WarnContext(ctx, "placeorder inventory check failed")
+			return err
+		}
+	}
+	return nil
+}
+
+func CheckoutIdHandler(fn func(checkoutId checkout.CheckoutId, w http.ResponseWriter, r *http.Request) error) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		var id checkout.CheckoutId
+		raw := r.PathValue("id")
+		if raw == "" {
+			id = checkout.CheckoutId(cart.MustNewCartId())
+			w.Header().Set("Set-Checkout-Id", id.String())
+		} else {
+			if parsedId, ok := cart.ParseCartId(raw); !ok {
+				w.WriteHeader(http.StatusBadRequest)
+				w.Write([]byte("checkout id is invalid"))
+				return
+			} else {
+				id = checkout.CheckoutId(parsedId)
+			}
+		}
+
+		err := fn(id, w, r)
+		if err != nil {
+			log.Printf("Server error, not remote error: %v\n", err)
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(err.Error()))
+		}
+	}
+}
+
+func (s *CheckoutPoolServer) ProxyHandler(fn func(w http.ResponseWriter, r *http.Request, checkoutId checkout.CheckoutId) error) func(checkoutId checkout.CheckoutId, w http.ResponseWriter, r *http.Request) error {
+	return func(checkoutId checkout.CheckoutId, w http.ResponseWriter, r *http.Request) error {
+		if ownerHost, ok := s.OwnerHost(uint64(checkoutId)); ok {
+			ctx, span := tracer.Start(r.Context(), "proxy")
+			defer span.End()
+			span.SetAttributes(attribute.String("checkoutid", checkoutId.String()))
+			hostAttr := attribute.String("other host", ownerHost.Name())
+			span.SetAttributes(hostAttr)
+			logger.InfoContext(ctx, "checkout proxyed", "result", ownerHost.Name())
+			proxyCalls.Add(ctx, 1, metric.WithAttributes(hostAttr))
+			handled, err := ownerHost.Proxy(uint64(checkoutId), w, r, nil)
+
+			grainLookups.Inc()
+			if err == nil && handled {
+				return nil
+			}
+		}
+		_, span := tracer.Start(r.Context(), "own")
+		span.SetAttributes(attribute.String("checkoutid", checkoutId.String()))
+		defer span.End()
+		return fn(w, r, checkoutId)
+	}
+}

pkg/actor/mutation_registry.go

@@ -95,14 +95,18 @@ type MutationHandler interface {
 type RegisteredMutation[V any, T proto.Message] struct {
 	name    string
 	handler func(*V, T) error
-	create  func() T
+	create  func() proto.Message
 	msgType reflect.Type
 }
 
-func NewMutation[V any, T proto.Message](handler func(*V, T) error, create func() T) *RegisteredMutation[V, T] {
+func NewMutation[V any, T proto.Message](handler func(*V, T) error) *RegisteredMutation[V, T] {
 	// Derive the name and message type from a concrete instance produced by create().
 	// This avoids relying on reflect.TypeFor (which can yield unexpected results in some toolchains)
 	// and ensures we always peel off the pointer layer for proto messages.
+	create := func() proto.Message {
+		m := new(T)
+		return *m
+	}
 	instance := create()
 	rt := reflect.TypeOf(instance)
 	if rt.Kind() == reflect.Ptr {

pkg/actor/mutation_registry_test.go

@@ -6,33 +6,32 @@ import (
 	"slices"
 	"testing"
 
-	"git.k6n.net/go-cart-actor/pkg/messages"
+	cart_messages "git.k6n.net/go-cart-actor/proto/cart"
 )
 
 type cartState struct {
 	calls     int
-	lastAdded *messages.AddItem
+	lastAdded *cart_messages.AddItem
 }
 
 func TestRegisteredMutationBasics(t *testing.T) {
 	reg := NewMutationRegistry().(*ProtoMutationRegistry)
 
 	addItemMutation := NewMutation(
-		func(state *cartState, msg *messages.AddItem) error {
+		func(state *cartState, msg *cart_messages.AddItem) error {
 			state.calls++
 			// copy to avoid external mutation side-effects (not strictly necessary for the test)
 			cp := msg
 			state.lastAdded = cp
 			return nil
 		},
-		func() *messages.AddItem { return &messages.AddItem{} },
 	)
 
 	// Sanity check on mutation metadata
 	if addItemMutation.Name() != "AddItem" {
 		t.Fatalf("expected mutation Name() == AddItem, got %s", addItemMutation.Name())
 	}
-	if got, want := addItemMutation.Type(), reflect.TypeOf(messages.AddItem{}); got != want {
+	if got, want := addItemMutation.Type(), reflect.TypeOf(cart_messages.AddItem{}); got != want {
 		t.Fatalf("expected Type() == %v, got %v", want, got)
 	}
 
@@ -46,18 +45,18 @@ func TestRegisteredMutationBasics(t *testing.T) {
 
 	// RegisteredMutationTypes: membership (order not guaranteed)
 	types := reg.RegisteredMutationTypes()
-	if !slices.Contains(types, reflect.TypeOf(messages.AddItem{})) {
+	if !slices.Contains(types, reflect.TypeOf(cart_messages.AddItem{})) {
 		t.Fatalf("RegisteredMutationTypes missing AddItem type, got %v", types)
 	}
 
 	// GetTypeName should resolve for a pointer instance
-	name, ok := reg.GetTypeName(&messages.AddItem{})
+	name, ok := reg.GetTypeName(&cart_messages.AddItem{})
 	if !ok || name != "AddItem" {
 		t.Fatalf("GetTypeName returned (%q,%v), expected (AddItem,true)", name, ok)
 	}
 
 	// GetTypeName should fail for unregistered type
-	if name, ok := reg.GetTypeName(&messages.RemoveItem{}); ok || name != "" {
+	if name, ok := reg.GetTypeName(&cart_messages.RemoveItem{}); ok || name != "" {
 		t.Fatalf("expected GetTypeName to fail for unregistered message, got (%q,%v)", name, ok)
 	}
 
@@ -66,7 +65,7 @@ func TestRegisteredMutationBasics(t *testing.T) {
 	if !ok {
 		t.Fatalf("Create failed for registered mutation")
 	}
-	if _, isAddItem := msg.(*messages.AddItem); !isAddItem {
+	if _, isAddItem := msg.(*cart_messages.AddItem); !isAddItem {
 		t.Fatalf("Create returned wrong concrete type: %T", msg)
 	}
 
@@ -77,7 +76,7 @@ func TestRegisteredMutationBasics(t *testing.T) {
 
 	// Apply happy path
 	state := &cartState{}
-	add := &messages.AddItem{ItemId: 42, Quantity: 3, Sku: "ABC"}
+	add := &cart_messages.AddItem{ItemId: 42, Quantity: 3, Sku: "ABC"}
 	if _, err := reg.Apply(context.Background(), state, add); err != nil {
 		t.Fatalf("Apply returned error: %v", err)
 	}
@@ -99,7 +98,7 @@ func TestRegisteredMutationBasics(t *testing.T) {
 	}
 
 	// Apply unregistered message
-	_, err := reg.Apply(context.Background(), state, &messages.RemoveItem{})
+	_, err := reg.Apply(context.Background(), state, &cart_messages.RemoveItem{})
 	if err != ErrMutationNotRegistered {
 		t.Fatalf("expected ErrMutationNotRegistered, got %v", err)
 	}

pkg/cart/cart-mutation-helper.go

@@ -5,7 +5,6 @@ import (
 	"time"
 
 	"git.k6n.net/go-cart-actor/pkg/actor"
-	messages "git.k6n.net/go-cart-actor/proto/cart"
 	"github.com/matst80/go-redis-inventory/pkg/inventory"
 )
 
@@ -57,43 +56,28 @@ func (c *CartMutationContext) ReleaseItem(ctx context.Context, cartId CartId, sk
 	return c.reservationService.ReleaseForCart(ctx, inventory.SKU(sku), l, inventory.CartID(cartId.String()))
 }
 
+func Create[T any]() func() *T {
+	return func() *T {
+		return new(T)
+	}
+}
+
 func NewCartMultationRegistry(context *CartMutationContext) actor.MutationRegistry {
 
 	reg := actor.NewMutationRegistry()
 	reg.RegisterMutations(
-		actor.NewMutation(context.AddItem, func() *messages.AddItem {
+		actor.NewMutation(context.AddItem),
-			return &messages.AddItem{}
+		actor.NewMutation(context.ChangeQuantity),
-		}),
+		actor.NewMutation(context.RemoveItem),
-		actor.NewMutation(context.ChangeQuantity, func() *messages.ChangeQuantity {
+		actor.NewMutation(ClearCart),
-			return &messages.ChangeQuantity{}
+		actor.NewMutation(AddVoucher),
-		}),
+		actor.NewMutation(RemoveVoucher),
-		actor.NewMutation(context.RemoveItem, func() *messages.RemoveItem {
+		actor.NewMutation(UpsertSubscriptionDetails),
-			return &messages.RemoveItem{}
+		actor.NewMutation(SetUserId),
-		}),
+		actor.NewMutation(LineItemMarking),
-		actor.NewMutation(ClearCart, func() *messages.ClearCartRequest {
+		actor.NewMutation(RemoveLineItemMarking),
-			return &messages.ClearCartRequest{}
+		actor.NewMutation(SubscriptionAdded),
-		}),
+		//		actor.NewMutation(SubscriptionRemoved),
-		actor.NewMutation(AddVoucher, func() *messages.AddVoucher {
-			return &messages.AddVoucher{}
-		}),
-		actor.NewMutation(RemoveVoucher, func() *messages.RemoveVoucher {
-			return &messages.RemoveVoucher{}
-		}),
-		actor.NewMutation(UpsertSubscriptionDetails, func() *messages.UpsertSubscriptionDetails {
-			return &messages.UpsertSubscriptionDetails{}
-		}),
-		actor.NewMutation(SetUserId, func() *messages.SetUserId {
-			return &messages.SetUserId{}
-		}),
-		actor.NewMutation(LineItemMarking, func() *messages.LineItemMarking {
-			return &messages.LineItemMarking{}
-		}),
-		actor.NewMutation(RemoveLineItemMarking, func() *messages.RemoveLineItemMarking {
-			return &messages.RemoveLineItemMarking{}
-		}),
-		actor.NewMutation(SubscriptionAdded, func() *messages.SubscriptionAdded {
-			return &messages.SubscriptionAdded{}
-		}),
 	)
 	return reg
 

pkg/checkout/mutation-context.go

@@ -2,7 +2,6 @@ package checkout
 
 import (
 	"git.k6n.net/go-cart-actor/pkg/actor"
-	messages "git.k6n.net/go-cart-actor/proto/checkout"
 )
 
 type CheckoutMutationContext struct {
@@ -16,20 +15,17 @@ func NewCheckoutMutationContext() *CheckoutMutationContext {
 func NewCheckoutMutationRegistry(ctx *CheckoutMutationContext) actor.MutationRegistry {
 	reg := actor.NewMutationRegistry()
 	reg.RegisterMutations(
-		actor.NewMutation(HandleInitializeCheckout, func() *messages.InitializeCheckout { return &messages.InitializeCheckout{} }),
+		actor.NewMutation(HandleInitializeCheckout),
-		actor.NewMutation(HandlePaymentStarted, func() *messages.PaymentStarted { return &messages.PaymentStarted{} }),
+		actor.NewMutation(HandlePaymentStarted),
-		actor.NewMutation(HandlePaymentCompleted, func() *messages.PaymentCompleted { return &messages.PaymentCompleted{} }),
+		actor.NewMutation(HandlePaymentCompleted),
-		actor.NewMutation(HandlePaymentDeclined, func() *messages.PaymentDeclined { return &messages.PaymentDeclined{} }),
+		actor.NewMutation(HandlePaymentDeclined),
-		actor.NewMutation(HandlePaymentEvent, func() *messages.PaymentEvent { return &messages.PaymentEvent{} }),
+		actor.NewMutation(HandlePaymentEvent),
-		actor.NewMutation(HandleConfirmationViewed, func() *messages.ConfirmationViewed { return &messages.ConfirmationViewed{} }),
+		actor.NewMutation(HandleConfirmationViewed),
-		//actor.NewMutation(HandleCreateCheckoutOrder, func() *messages.CreateCheckoutOrder { return &messages.CreateCheckoutOrder{} }),
+		actor.NewMutation(HandleOrderCreated),
-		actor.NewMutation(HandleOrderCreated, func() *messages.OrderCreated { return &messages.OrderCreated{} }),
+		actor.NewMutation(HandleInventoryReserved),
-		actor.NewMutation(HandleInventoryReserved, func() *messages.InventoryReserved { return &messages.InventoryReserved{} }),
+		actor.NewMutation(HandleSetDelivery),
-		actor.NewMutation(HandleSetDelivery, func() *messages.SetDelivery { return &messages.SetDelivery{} }),
+		actor.NewMutation(HandleSetPickupPoint),
-		actor.NewMutation(HandleSetPickupPoint, func() *messages.SetPickupPoint { return &messages.SetPickupPoint{} }),
+		actor.NewMutation(HandleRemoveDelivery),
-		actor.NewMutation(HandleRemoveDelivery, func() *messages.RemoveDelivery { return &messages.RemoveDelivery{} }),
-		// actor.NewMutation(HandleAddGiftcard, func() *messages.AddGiftcard { return &messages.AddGiftcard{} }),
-		// actor.NewMutation(HandleRemoveGiftcard, func() *messages.RemoveGiftcard { return &messages.RemoveGiftcard{} }),
 	)
 	return reg
 }