setup config loading

internal/config/config.go

@@ -0,0 +1,33 @@
+package config
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/joho/godotenv"
+)
+
+type Config struct {
+	PorkbunApiKeyName       string
+	PorkbunSecretApiKeyName string
+}
+
+func Load() *Config {
+	godotenv.Load()
+
+	cfg := &Config{
+		PorkbunApiKeyName:       envRequired("PORKBUN_API_KEY_NAME"),
+		PorkbunSecretApiKeyName: envRequired("PORKBUN_SECRET_API_KEY_NAME"),
+	}
+
+	return cfg
+}
+
+func envRequired(key string) string {
+	value, ok := os.LookupEnv(key)
+	if !ok || value == "" {
+		fmt.Printf("Error: required environment variable %s not set.\n", key)
+		os.Exit(1)
+	}
+	return value
+}