general cleanup - removed old comments, enforced naming conventions etc
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KS Jannette
164
backend/cmd/api/main.go
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164
backend/cmd/api/main.go
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@@ -0,0 +1,164 @@
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// Package main is the entry point for the API server.
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package main
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import (
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"fmt"
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"log"
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"net/http"
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"time"
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"github.com/joho/godotenv"
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"github.com/kjannette/koin-ping/backend/internal/config"
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"github.com/kjannette/koin-ping/backend/internal/database"
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"github.com/kjannette/koin-ping/backend/internal/firebase"
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"github.com/kjannette/koin-ping/backend/internal/handlers"
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"github.com/kjannette/koin-ping/backend/internal/middleware"
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"github.com/kjannette/koin-ping/backend/internal/models"
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"github.com/kjannette/koin-ping/backend/internal/services"
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)
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const (
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// max duration to read a request.
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serverReadTimeoutSeconds = 5
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// maxiduration to write a response.
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serverWriteTimeoutSeconds = 10
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)
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//nolint:funlen
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func main() {
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_ = godotenv.Load() // .env is optional; env vars can also be set externally
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cfg, err := config.Load()
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if err != nil {
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log.Fatalf("Failed to load config: %v", err)
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}
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pool, err := database.Connect(cfg.DSN())
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if err != nil {
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log.Fatalf("Failed to connect to database: %v", err)
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}
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if err := firebase.Init(cfg.FirebaseProjectID); err != nil {
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log.Fatalf("Failed to initialize Firebase: %v", err)
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}
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defer database.Close()
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userModel := models.NewUserModel(pool)
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addressModel := models.NewAddressModel(pool)
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alertRuleModel := models.NewAlertRuleModel(pool)
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alertEventModel := models.NewAlertEventModel(pool)
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checkpointModel := models.NewCheckpointModel(pool)
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notifConfigModel := models.NewNotificationConfigModel(pool)
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emailDigestSvc := services.NewEmailDigestService(
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cfg.ResendAPIKey, cfg.EmailFrom, alertEventModel, notifConfigModel,
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)
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addressHandler := handlers.NewAddressHandler(addressModel)
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alertRuleHandler := handlers.NewAlertRuleHandler(alertRuleModel, addressModel)
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alertEventHandler := handlers.NewAlertEventHandler(alertEventModel)
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notifConfigHandler := handlers.NewNotificationConfigHandler(notifConfigModel, cfg)
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emailDigestHandler := handlers.NewEmailDigestHandler(emailDigestSvc, notifConfigModel)
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statusHandler := handlers.NewStatusHandler(checkpointModel)
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stripeHandler := handlers.NewStripeHandler(userModel, cfg)
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authenticate := middleware.Authenticate(userModel)
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requireSub := middleware.RequireSubscription(userModel)
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// authAndSub chains authentication + subscription check for protected routes.
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authAndSub := func(h http.Handler) http.Handler {
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return authenticate(requireSub(h))
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}
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mux := http.NewServeMux()
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b := cfg.APIBasePath // e.g. "/v1"
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// Public routes
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mux.HandleFunc("GET "+b+"/health", handlers.HealthCheck)
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mux.HandleFunc("GET "+b+"/status", statusHandler.GetStatus)
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// Stripe webhook (public — called by Stripe, not authenticated)
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mux.HandleFunc("POST "+b+"/stripe/webhook", stripeHandler.HandleWebhook)
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// Stripe routes (auth required, NO subscription required)
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mux.Handle("POST "+b+"/stripe/create-checkout-session",
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authenticate(http.HandlerFunc(stripeHandler.CreateCheckoutSession)))
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mux.Handle("GET "+b+"/stripe/subscription-status",
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authenticate(http.HandlerFunc(stripeHandler.GetSubscriptionStatus)))
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mux.Handle("POST "+b+"/stripe/verify-checkout",
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authenticate(http.HandlerFunc(stripeHandler.VerifyCheckoutSession)))
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// Authenticated + subscribed routes — addresses
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mux.Handle("POST "+b+"/addresses",
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authAndSub(http.HandlerFunc(addressHandler.Create)))
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mux.Handle("GET "+b+"/addresses",
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authAndSub(http.HandlerFunc(addressHandler.List)))
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mux.Handle("DELETE "+b+"/addresses/{addressId}",
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authAndSub(http.HandlerFunc(addressHandler.Remove)))
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mux.Handle("PATCH "+b+"/addresses/{addressId}",
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authAndSub(http.HandlerFunc(addressHandler.UpdateLabel)))
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// Authenticated + subscribed routes — alert rules
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mux.Handle("POST "+b+"/addresses/{addressId}/alerts",
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authAndSub(http.HandlerFunc(alertRuleHandler.Create)))
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mux.Handle("GET "+b+"/addresses/{addressId}/alerts",
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authAndSub(http.HandlerFunc(alertRuleHandler.ListByAddress)))
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mux.Handle("PATCH "+b+"/alerts/{alertId}",
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authAndSub(http.HandlerFunc(alertRuleHandler.UpdateStatus)))
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mux.Handle("DELETE "+b+"/alerts/{alertId}",
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authAndSub(http.HandlerFunc(alertRuleHandler.Remove)))
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// Authenticated + subscribed routes — alert events
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mux.Handle("GET "+b+"/alert-events",
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authAndSub(http.HandlerFunc(alertEventHandler.List)))
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// Authenticated + subscribed routes — notification config
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mux.Handle("GET "+b+"/notification-config",
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authAndSub(http.HandlerFunc(notifConfigHandler.GetConfig)))
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mux.Handle("PUT "+b+"/notification-config",
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authAndSub(http.HandlerFunc(notifConfigHandler.UpdateConfig)))
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mux.Handle("DELETE "+b+"/notification-config",
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authAndSub(http.HandlerFunc(notifConfigHandler.DeleteConfig)))
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mux.Handle("POST "+b+"/notification-config/test",
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authAndSub(http.HandlerFunc(notifConfigHandler.TestChannels)))
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// Authenticated + subscribed routes — email digest
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mux.Handle("POST "+b+"/email/setup",
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authAndSub(http.HandlerFunc(emailDigestHandler.SetupEmail)))
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mux.Handle("POST "+b+"/email/digest",
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authAndSub(http.HandlerFunc(emailDigestHandler.SendDigest)))
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handler := corsMiddleware(mux)
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addr := fmt.Sprintf(":%d", cfg.Port)
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log.Printf("Server running on port %d", cfg.Port)
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log.Printf("API base path: %s", cfg.APIBasePath)
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log.Printf("Environment: %s", cfg.NodeEnv)
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server := &http.Server{
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Addr: addr,
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Handler: handler,
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ReadTimeout: serverReadTimeoutSeconds * time.Second,
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WriteTimeout: serverWriteTimeoutSeconds * time.Second,
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}
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if err := server.ListenAndServe(); err != nil {
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log.Fatalf("Server failed: %v", err)
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}
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}
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func corsMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, PATCH, DELETE, OPTIONS")
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w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
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if r.Method == http.MethodOptions {
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w.WriteHeader(http.StatusNoContent)
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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148
backend/cmd/poller/main.go
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148
backend/cmd/poller/main.go
Normal file
@@ -0,0 +1,148 @@
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// Package main is the entry point for the blockchain observer poller.
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package main
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import (
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"context"
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"fmt"
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"log"
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"os"
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"os/signal"
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"strings"
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"syscall"
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"time"
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"github.com/joho/godotenv"
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"github.com/kjannette/koin-ping/backend/internal/config"
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"github.com/kjannette/koin-ping/backend/internal/database"
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"github.com/kjannette/koin-ping/backend/internal/models"
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"github.com/kjannette/koin-ping/backend/internal/protocols/ethereum"
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"github.com/kjannette/koin-ping/backend/internal/services"
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)
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const (
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// separatorWidth is the number of characters in log separator lines.
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separatorWidth = 60
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// msPerSecond converts milliseconds to seconds.
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msPerSecond = 1000
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)
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//nolint:funlen
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func main() {
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_ = godotenv.Load()
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cfg, err := config.Load()
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if err != nil {
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log.Fatalf("Failed to load config: %v", err)
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}
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if cfg.EthRPCURL == "" {
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log.Fatal("ERROR: ETH_RPC_URL environment variable is required")
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}
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pool, err := database.Connect(cfg.DSN())
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if err != nil {
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log.Fatalf("Failed to connect to database: %v", err)
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}
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eth, err := ethereum.NewJsonRpcEthereum(cfg.EthRPCURL)
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if err != nil {
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log.Fatalf("Failed to create Ethereum observer: %v", err)
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}
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defer database.Close()
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addressModel := models.NewAddressModel(pool)
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alertRuleModel := models.NewAlertRuleModel(pool)
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alertEventModel := models.NewAlertEventModel(pool)
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checkpointModel := models.NewCheckpointModel(pool)
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notifConfigModel := models.NewNotificationConfigModel(pool)
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observer := services.NewObserverService(eth, addressModel, checkpointModel)
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evaluator := services.NewEvaluatorService(
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eth, alertRuleModel, alertEventModel, addressModel, notifConfigModel,
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cfg.ResendAPIKey, cfg.EmailFrom,
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)
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digestSvc := services.NewEmailDigestService(cfg.ResendAPIKey, cfg.EmailFrom, alertEventModel, notifConfigModel)
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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sigCh := make(chan os.Signal, 1)
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signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
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go func() {
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<-sigCh
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log.Println()
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log.Println(strings.Repeat("=", separatorWidth))
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log.Println("Shutting down poller gracefully...")
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log.Println(strings.Repeat("=", separatorWidth))
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cancel()
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}()
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interval := time.Duration(cfg.PollIntervalMS) * time.Millisecond
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digestInterval := time.Duration(cfg.DigestIntervalHours) * time.Hour
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log.Println(strings.Repeat("=", separatorWidth))
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log.Println("Koin Ping Observer Poller Starting")
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log.Println(strings.Repeat("=", separatorWidth))
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log.Printf("RPC URL: %s", cfg.EthRPCURL)
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log.Printf("Poll Interval: %dms (%ds)", cfg.PollIntervalMS, cfg.PollIntervalMS/msPerSecond)
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log.Printf("Digest Interval: %dh", cfg.DigestIntervalHours)
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log.Println(strings.Repeat("=", separatorWidth))
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runCycle(ctx, observer, evaluator)
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ticker := time.NewTicker(interval)
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defer ticker.Stop()
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digestTicker := time.NewTicker(digestInterval)
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defer digestTicker.Stop()
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for {
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select {
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case <-ctx.Done():
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log.Println("Poller stopped")
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return
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case <-ticker.C:
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runCycle(ctx, observer, evaluator)
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case <-digestTicker.C:
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sent, digestErr := digestSvc.SendDigestsForAllUsers(ctx)
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if digestErr != nil {
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log.Printf("Email digest failed: %v", digestErr)
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} else {
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log.Printf("Sent %d email digests", sent)
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}
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}
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}
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}
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func runCycle(
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ctx context.Context,
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observer *services.ObserverService,
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evaluator *services.EvaluatorService,
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) {
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startTime := time.Now()
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log.Printf("[%s] Starting observation cycle...", time.Now().UTC().Format(time.RFC3339))
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observations, err := observer.RunOnce(ctx)
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if err != nil {
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log.Printf("[%s] Observation cycle failed: %v", time.Now().UTC().Format(time.RFC3339), err)
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return
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}
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alertsFired, err := evaluator.Evaluate(ctx, observations)
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if err != nil {
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log.Printf("[%s] Evaluation failed: %v", time.Now().UTC().Format(time.RFC3339), err)
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return
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}
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evaluator.WaitForNotifications()
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duration := time.Since(startTime)
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log.Printf("[%s] Cycle complete: %d observations, %d alerts fired in %s",
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time.Now().UTC().Format(time.RFC3339),
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len(observations), alertsFired,
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fmt.Sprintf("%dms", duration.Milliseconds()))
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}
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