Add payment service

Taskfile.yml

@@ -18,7 +18,7 @@ vars:
   PROTOC_GEN_GO: '{{.BIN_DIR}}/protoc-gen-go'
   PROTOC_GEN_GO_GRPC: '{{.BIN_DIR}}/protoc-gen-go-grpc'
 
-  MODULES: inventory order payment shared
+  MODULES: inventory payment shared
 
 tasks:
   install-formatters:

payment/cmd/main.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"net"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/google/uuid"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/reflection"
+	"google.golang.org/grpc/status"
+
+	paymentv1 "github.com/qyrlabs/test-backend/shared/pkg/proto/payment/v1"
+)
+
+const grpcPort = 50062
+
+type paymentService struct {
+	paymentv1.UnimplementedPaymentServiceServer
+}
+
+// Initiates order payment.
+func (s *paymentService) PayOrder(ctx context.Context, req *paymentv1.PayOrderRequest) (*paymentv1.PayOrderResponse, error) {
+	if _, err := uuid.Parse(req.GetOrderUuid()); err != nil {
+		return nil, status.Errorf(codes.InvalidArgument, "invalid order_uuid format: %v", err)
+	}
+	if _, err := uuid.Parse(req.GetUserUuid()); err != nil {
+		return nil, status.Errorf(codes.InvalidArgument, "invalid user_uuid format: %v", err)
+	}
+	if req.GetPaymentMethod() == 0 {
+		return nil, status.Error(codes.InvalidArgument, "invalid payment method")
+	}
+
+	uuid := uuid.New().String()
+	log.Printf("Payment succeed, transaction_uuid: %s", uuid)
+	return &paymentv1.PayOrderResponse{
+		TransactionUuid: uuid,
+	}, nil
+}
+
+func main() {
+	lis, err := net.Listen("tcp", fmt.Sprintf("localhost:%d", grpcPort))
+	if err != nil {
+		log.Printf("failed to listen: %v\n", err)
+		return
+	}
+
+	defer func() {
+		if cerr := lis.Close(); cerr != nil {
+			log.Printf("failed to close listener: %v\n", cerr)
+		}
+	}()
+
+	grpcServer := grpc.NewServer()
+	reflection.Register(grpcServer)
+
+	service := &paymentService{}
+
+	paymentv1.RegisterPaymentServiceServer(grpcServer, service)
+
+	go func() {
+		log.Printf("gRPC server listening on %s\n", lis.Addr().String())
+		err := grpcServer.Serve(lis)
+		if err != nil {
+			log.Printf("Failed to serve: %v\n", err)
+			return
+		}
+	}()
+
+	// Graceful shutdown
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+	log.Println("Shutting down gRPC server...")
+	grpcServer.GracefulStop()
+	log.Println("gRPC server stopped")
+}

payment/go.mod

@@ -1,3 +1,19 @@
 module github.com/qyrlabs/test-backend/payment
 
 go 1.25.6
+
+replace github.com/qyrlabs/test-backend/shared => ../shared
+
+require (
+	github.com/google/uuid v1.6.0
+	github.com/qyrlabs/test-backend/shared v0.0.0-00010101000000-000000000000
+	google.golang.org/grpc v1.78.0
+)
+
+require (
+	golang.org/x/net v0.47.0 // indirect
+	golang.org/x/sys v0.38.0 // indirect
+	golang.org/x/text v0.31.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260120174246-409b4a993575 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
+)

payment/go.sum

@@ -0,0 +1,36 @@
+github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
+github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
+github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
+github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
+github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
+github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ64=
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+go.opentelemetry.io/otel/trace v1.38.0 h1:Fxk5bKrDZJUH+AMyyIXGcFAPah0oRcT+LuNtJrmcNLE=
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+google.golang.org/genproto/googleapis/rpc v0.0.0-20260120174246-409b4a993575/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
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