feat: kavenegar sdk, otp generation and verifying

config/config.go

@@ -1,12 +1,13 @@
 package config
 
 type Config struct {
-	Server      Server `mapstructure:"server"`
+	Server      Server      `mapstructure:"server"`
-	JWT         JWT    `mapstructure:"jwt"`
+	JWT         JWT         `mapstructure:"jwt"`
-	DB          DB     `mapstructure:"db"`
+	DB          DB          `mapstructure:"db"`
-	Redis       Redis  `mapstructure:"redis"`
+	Redis       Redis       `mapstructure:"redis"`
-	KYCProvider KYC    `mapstructure:"kyc"`
+	KYCProvider KYC         `mapstructure:"kyc"`
-	OTP         OTP    `mapstructure:"otp"`
+	OTP         OTP         `mapstructure:"otp"`
+	Kavenegar   SMSProvider `mapstructure:"kavenegar"`
 }
 type Server struct {
 	Host string `mapstructure:"host"`
@@ -41,3 +42,8 @@ type KYC struct {
 type OTP struct {
 	CodeExpMinutes uint `mapstructure:"code_exp_minutes"`
 }
+
+type SMSProvider struct {
+	APIKey   string `mapstructure:"api_key"`
+	Template string `mapstructure:"template"`
+}

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/gofiber/fiber/v2 v2.52.9
 	github.com/golang-jwt/jwt/v5 v5.3.0
 	github.com/google/uuid v1.6.0
+	github.com/kavenegar/kavenegar-go v0.0.0-20240205151018-77039f51467d
 	github.com/redis/go-redis/v9 v9.13.0
 	github.com/spf13/viper v1.21.0
 	github.com/swaggo/http-swagger v1.3.4

go.sum

@@ -149,6 +149,8 @@ github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
 github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
+github.com/kavenegar/kavenegar-go v0.0.0-20240205151018-77039f51467d h1:5yPyBSS28Nojbr7pAkiXADGj6VpTXx73o6SsprKbSoo=
+github.com/kavenegar/kavenegar-go v0.0.0-20240205151018-77039f51467d/go.mod h1:CRhvvr4KNAyrg+ewrutOf+/QoHs7lztSoLjp+GqhYlA=
 github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
 github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
 github.com/klauspost/cpuid/v2 v2.0.9 h1:lgaqFMSdTdQYdZ04uHyN2d/eKdOMyi2YLSvlQIBFYa4=

internal/api/dto/auth.go

@@ -24,3 +24,7 @@ type AuthenticateResponse struct {
 type RefreshTokenRequest struct {
 	RefreshToken string `json:"refreshToken" validate:"required,jwt"`
 }
+
+type OTPProviderReq struct {
+	Receptor string `json:"receptor"`
+}

internal/app/app.go

@@ -8,6 +8,7 @@ import (
 	"backend/internal/usecase"
 	cachePackage "backend/pkg/cache"
 	"backend/pkg/postgres"
+	"backend/pkg/sms"
 	"backend/pkg/zohal"
 	"fmt"
 	"log"
@@ -45,13 +46,17 @@ func NewAppContainer(cfg config.Config) (*AppContainer, error) {
 	sessionRepo := cache.NewSessionRepository(redis)
 	challengeRepo := cache.NewChallengeRepository(redis)
 	zohal := zohal.NewZohal(cfg.KYCProvider)
+	otpRepo := cache.NewOTPRepository(redis)
+	smsProvider := sms.NewKavenegar(cfg.Kavenegar)
 
 	authService := usecase.NewAuthService(
 		userRepo,
 		sessionRepo,
 		challengeRepo,
 		30,
+		otpRepo,
 		zohal,
+		smsProvider,
 		cfg,
 	)
 

internal/domain/otp.go

@@ -10,6 +10,7 @@ import (
 
 type OTPRepo interface {
 	Create(ctx context.Context, phone string, otp *OTP) error
+	Get(ctx context.Context, phone string) (*OTP, error)
 	Delete(ctx context.Context, phone string) error
 }
 
@@ -17,7 +18,7 @@ type OTP struct {
 	ID        uuid.UUID
 	Code      string
 	Phone     string
-	ExpiredAt time.Time
+	ExpiresAt time.Time
 }
 
 func NewOTP(phone string) *OTP {
@@ -27,3 +28,7 @@ func NewOTP(phone string) *OTP {
 		Phone: phone,
 	}
 }
+
+func (o *OTP) IsExpired() bool {
+	return time.Now().After(o.ExpiresAt)
+}

internal/repository/cache/otp_repo.go

@@ -7,6 +7,8 @@ import (
 	"encoding/json"
 	"fmt"
 	"time"
+
+	"github.com/redis/go-redis/v9"
 )
 
 type OTPRepository struct {
@@ -27,7 +29,7 @@ func (r *OTPRepository) Create(ctx context.Context, phone string, otp *domain.OT
 		return fmt.Errorf("failed to marshal otp: %w", err)
 	}
 
-	ttl := time.Until(otp.ExpiredAt)
+	ttl := time.Until(otp.ExpiresAt)
 	if ttl <= 0 {
 		return fmt.Errorf("OTP expired already")
 	}
@@ -48,6 +50,30 @@ func (r *OTPRepository) Delete(ctx context.Context, phone string) error {
 	return nil
 }
 
+func (r *OTPRepository) Get(ctx context.Context, phone string) (*domain.OTP, error) {
+	key := r.getOTPKey(phone)
+
+	result, err := r.redis.Client().Get(ctx, key).Result()
+	if err != nil {
+		if err == redis.Nil {
+			return nil, fmt.Errorf("otp code not found")
+		}
+		return nil, err
+	}
+
+	var otp domain.OTP
+	if err := json.Unmarshal([]byte(result), &otp); err != nil {
+		return nil, err
+	}
+
+	if otp.IsExpired() {
+		r.Delete(ctx, phone)
+		return nil, fmt.Errorf("otp is expired")
+	}
+	return &otp, nil
+
+}
+
 func (r *OTPRepository) getOTPKey(phone string) string {
 	return fmt.Sprintf("challenge:%s", phone)
 }

internal/usecase/auth_service.go

@@ -4,6 +4,7 @@ import (
 	"backend/config"
 	"backend/internal/domain"
 	"backend/pkg/jwt"
+	"backend/pkg/sms"
 	"backend/pkg/validate/common"
 	"backend/pkg/zohal"
 	"context"
@@ -12,6 +13,7 @@ import (
 	"time"
 
 	jwt2 "github.com/golang-jwt/jwt/v5"
+	"github.com/kavenegar/kavenegar-go"
 
 	"github.com/google/uuid"
 )
@@ -25,7 +27,9 @@ type authService struct {
 	userRepo      domain.UserRepo
 	sessionRepo   domain.SessionRepo
 	challengeRepo domain.ChallengeRepo
+	otpRepo       domain.OTPRepo
 	zohal         *zohal.Zohal
+	smsProvider   *sms.Kavenegar
 	challengeExp  uint
 	cfg           config.Config
 }
@@ -41,15 +45,19 @@ func NewAuthService(
 	sessionRepo domain.SessionRepo,
 	challengeRepo domain.ChallengeRepo,
 	challengeExp uint,
+	otpRepo domain.OTPRepo,
 	zohal *zohal.Zohal,
+	smsProvider *sms.Kavenegar,
 	cfg config.Config,
 ) AuthService {
 	return &authService{
 		userRepo:      userRepo,
 		sessionRepo:   sessionRepo,
 		challengeRepo: challengeRepo,
+		otpRepo:       otpRepo,
 		challengeExp:  challengeExp,
 		zohal:         zohal,
+		smsProvider:   smsProvider,
 		cfg:           cfg,
 	}
 }
@@ -190,6 +198,38 @@ func (s *authService) VerifyKYC(ctx context.Context, userID, nationalID, birthDa
 		shahkarResp.StatusCode, identityResp.StatusCode)
 }
 
-func (*authService) SendOTPVerifaction(ctx context.Context, phone string) (string, error) {
+func (s *authService) SendOTPCode(ctx context.Context, phone string) (string, error) {
-	return "", nil
+	otp := domain.NewOTP(phone)
+	if err := s.otpRepo.Create(ctx, phone, otp); err != nil {
+		return "", err
+	}
+	otpMsg := &sms.OTPMsg{
+		Receptor: otp.Phone,
+		Token:    otp.Code,
+		Template: s.cfg.Kavenegar.Template,
+		// TODO: make sure when use VerfiyLookup Params
+		Params: kavenegar.VerifyLookupParam{},
+	}
+	err := s.smsProvider.OTP(otpMsg)
+	if err != nil {
+		return "", err
+	}
+
+	return otp.Code, err
+}
+
+func (s *authService) VerifyOTP(ctx context.Context, phone, code string) error {
+	otp, err := s.otpRepo.Get(ctx, phone)
+	if err != nil {
+		return err
+	}
+
+	if otp == nil {
+		return errors.New("otp code not found or expired")
+	}
+
+	if code != otp.Code {
+		return errors.New("otp code is not valid")
+	}
+	return nil
 }

pkg/sms/kavengar.go

@@ -0,0 +1,32 @@
+package sms
+
+import (
+	"backend/config"
+
+	"github.com/kavenegar/kavenegar-go"
+)
+
+type Kavenegar struct {
+	*kavenegar.Kavenegar
+}
+
+type OTPMsg struct {
+	Receptor string
+	Token    string
+	Template string
+	Params   kavenegar.VerifyLookupParam
+}
+
+func NewKavenegar(cfg config.SMSProvider) *Kavenegar {
+	instance := kavenegar.New(cfg.APIKey)
+	return &Kavenegar{
+		Kavenegar: instance,
+	}
+}
+
+func (k *Kavenegar) OTP(otpMsg *OTPMsg) error {
+	if _, err := k.Verify.Lookup(otpMsg.Receptor, otpMsg.Template, otpMsg.Token, &otpMsg.Params); err != nil {
+		return err
+	}
+	return nil
+}