reject by timestamp using string

.gitignore

@@ -1,5 +1,7 @@
 /tmp
 config.yml
+whitelist.yml
+blacklist.yml
 relay_metadata.json
 grain.exe
 /build

app/static/examples/blacklist.example.yml

@@ -0,0 +1,16 @@
+enabled: true
+permanent_ban_words:
+  - nigger
+temp_ban_words:
+  - crypto
+  - web3
+  - airdrop
+max_temp_bans: 3
+temp_ban_duration: 3600
+permanent_blacklist_pubkeys:
+  - db0c9b8acd6101adb9b281c5321f98f6eebb33c5719d230ed1870997538a9765
+permanent_blacklist_npubs:
+  - npub1x0r5gflnk2mn6h3c70nvnywpy2j46gzqwg6k7uw6fxswyz0md9qqnhshtn
+mutelist_authors:
+  - 3fe0ab6cbdb7ee27148202249e3fb3b89423c6f6cda6ef43ea5057c3d93088e4
+# mutelist Event MUST be stored in this relay for it to be retrieved.

app/static/examples/config.example.yml

@@ -14,6 +14,12 @@ server:
   max_connections: 100
   max_subscriptions_per_client: 10
 
+event_time_constraints:
+  min_created_at: 1577836800 # January 1, 2020, as Unix timestamp
+  # min_created_at_string: now-5m  # Custom value to indicate 5 minutes in the past
+  # max_created_at: 0 # Set to 0 to use the default behavior of 'now'
+  max_created_at_string: now+5m # Use a string to set a date for max created at in the future or past from current time
+
 resource_limits:
   cpu_cores: 2 # Limit the number of CPU cores the application can use
   memory_mb: 1024 # Cap the maximum amount of RAM in MB the application can use
@@ -63,33 +69,6 @@ rate_limit:
       limit: 25
       burst: 50
 
-pubkey_whitelist:
-  enabled: false
-  pubkeys: [] # List of allowed public keys
-  npubs: [] # List of allowed npubs (Nostr public keys in bech32 format)
-
-kind_whitelist:
-  enabled: false
-  kinds: [] # List of allowed event kinds
-
-domain_whitelist:
-  enabled: false
-  domains: [] # List of allowed domains
-
-blacklist: #Removing a pubkey from the Blacklist requires a hard restart; Blacklist overides the Whitelist
-  enabled: true
-  permanent_ban_words: [] # Words that trigger a permanent ban
-  temp_ban_words: # Words that trigger a temporary ban
-    - crypto
-    - web3
-    - airdrop
-  max_temp_bans: 3 # Number of temporary bans before a permanent ban
-  temp_ban_duration: 3600 # Temporary ban duration in seconds
-  permanent_blacklist_pubkeys: # List of permanently banned public keys
-    - db0c9b8acd6101adb9b281c5321f98f6eebb33c5719d230ed1870997538a9765
-  permanent_blacklist_npubs: # List of permanently banned npubs
-    - npub1x0r5gflnk2mn6h3c70nvnywpy2j46gzqwg6k7uw6fxswyz0md9qqnhshtn
-
 event_purge:
   enabled: true # Toggle to enable/disable event purging
   keep_duration_days: 2 # Number of days to keep events

app/static/examples/whitelist.example.yml

@@ -0,0 +1,20 @@
+pubkey_whitelist:
+  enabled: false
+  pubkeys:
+    - pubkey1
+    - pubkey2
+  npubs:
+    - npub18ls2km9aklhzw9yzqgjfu0anhz2z83hkeknw7sl22ptu8kfs3rjq54am44
+    - npub2
+
+kind_whitelist:
+  enabled: false
+  kinds:
+    - "1"
+    - "2"
+
+domain_whitelist:
+  enabled: false
+  domains:
+    - "example.com"
+    - "anotherdomain.com"

config/Blacklist.go

@@ -1,41 +1,43 @@
 package config
 
 import (
+	"encoding/json"
 	"fmt"
 	types "grain/config/types"
 	"grain/server/utils"
+	"io"
 	"log"
 	"os"
 	"strings"
 	"sync"
 	"time"
 
+	"github.com/gorilla/websocket"
 	"gopkg.in/yaml.v2"
 )
 
 // CheckBlacklist checks if a pubkey is in the blacklist based on event content
 func CheckBlacklist(pubkey, eventContent string) (bool, string) {
-	blacklistConfig := GetConfig().Blacklist
-
-	if !blacklistConfig.Enabled {
+    blacklistConfig := GetBlacklistConfig()
+    if blacklistConfig == nil || !blacklistConfig.Enabled {
         return false, ""
     }
 
     log.Printf("Checking blacklist for pubkey: %s", pubkey)
 
-	// Check for permanent blacklist by pubkey or npub
+    // Check for permanent blacklist by pubkey or npub.
     if isPubKeyPermanentlyBlacklisted(pubkey, blacklistConfig) {
         log.Printf("Pubkey %s is permanently blacklisted", pubkey)
         return true, fmt.Sprintf("pubkey %s is permanently blacklisted", pubkey)
     }
 
-	// Check for temporary ban
+    // Check for temporary ban.
     if isPubKeyTemporarilyBlacklisted(pubkey) {
         log.Printf("Pubkey %s is temporarily blacklisted", pubkey)
         return true, fmt.Sprintf("pubkey %s is temporarily blacklisted", pubkey)
     }
 
-	// Check for permanent ban based on wordlist
+    // Check for permanent ban based on wordlist.
     for _, word := range blacklistConfig.PermanentBanWords {
         if strings.Contains(eventContent, word) {
             err := AddToPermanentBlacklist(pubkey)
@@ -46,10 +48,10 @@ func CheckBlacklist(pubkey, eventContent string) (bool, string) {
         }
     }
 
-	// Check for temporary ban based on wordlist
+    // Check for temporary ban based on wordlist.
     for _, word := range blacklistConfig.TempBanWords {
         if strings.Contains(eventContent, word) {
-			err := AddToTemporaryBlacklist(pubkey, blacklistConfig)
+            err := AddToTemporaryBlacklist(pubkey, *blacklistConfig)
             if err != nil {
                 return true, fmt.Sprintf("pubkey %s is temporarily banned and failed to save: %v", pubkey, err)
             }
@@ -60,6 +62,7 @@ func CheckBlacklist(pubkey, eventContent string) (bool, string) {
     return false, ""
 }
 
+
 // Checks if a pubkey is temporarily blacklisted
 func isPubKeyTemporarilyBlacklisted(pubkey string) bool {
 	mu.Lock()
@@ -142,20 +145,19 @@ func AddToTemporaryBlacklist(pubkey string, blacklistConfig types.BlacklistConfi
 	return nil
 }
 
-// Checks if a pubkey is permanently blacklisted (only using config.yml)
-func isPubKeyPermanentlyBlacklisted(pubKey string, blacklistConfig types.BlacklistConfig) bool {
-	if !blacklistConfig.Enabled {
+func isPubKeyPermanentlyBlacklisted(pubKey string, blacklistConfig *types.BlacklistConfig) bool {
+    if blacklistConfig == nil || !blacklistConfig.Enabled {
         return false
     }
 
-	// Check pubkeys
+    // Check pubkeys.
     for _, blacklistedKey := range blacklistConfig.PermanentBlacklistPubkeys {
         if pubKey == blacklistedKey {
             return true
         }
     }
 
-	// Check npubs
+    // Check npubs.
     for _, npub := range blacklistConfig.PermanentBlacklistNpubs {
         decodedPubKey, err := utils.DecodeNpub(npub)
         if err != nil {
@@ -171,34 +173,188 @@ func isPubKeyPermanentlyBlacklisted(pubKey string, blacklistConfig types.Blackli
 }
 
 func AddToPermanentBlacklist(pubkey string) error {
-	// Remove the mutex lock from here
-	blacklistConfig := GetConfig().Blacklist
+    blacklistConfig := GetBlacklistConfig()
+    if blacklistConfig == nil {
+        return fmt.Errorf("blacklist configuration is not loaded")
+    }
 
-	// Check if already blacklisted
+    // Check if already blacklisted.
     if isPubKeyPermanentlyBlacklisted(pubkey, blacklistConfig) {
         return fmt.Errorf("pubkey %s is already in the permanent blacklist", pubkey)
     }
 
-	// Add pubkey to the blacklist
+    // Add pubkey to the permanent blacklist.
     blacklistConfig.PermanentBlacklistPubkeys = append(blacklistConfig.PermanentBlacklistPubkeys, pubkey)
 
-	// Persist changes to config.yml
-	return saveBlacklistConfig(blacklistConfig)
+    // Persist changes to blacklist.yml.
+    return saveBlacklistConfig(*blacklistConfig)
 }
 
 func saveBlacklistConfig(blacklistConfig types.BlacklistConfig) error {
-	configData := GetConfig()
-	configData.Blacklist = blacklistConfig
-
-	data, err := yaml.Marshal(configData)
+    data, err := yaml.Marshal(blacklistConfig)
     if err != nil {
-		return fmt.Errorf("failed to marshal config: %v", err)
+        return fmt.Errorf("failed to marshal blacklist config: %v", err)
     }
 
-	err = os.WriteFile("config.yml", data, 0644)
+    err = os.WriteFile("blacklist.yml", data, 0644)
     if err != nil {
         return fmt.Errorf("failed to write config to file: %v", err)
     }
 
     return nil
 }
+
+// FetchPubkeysFromLocalMuteList sends a REQ to the local relay for mute list events.
+func FetchPubkeysFromLocalMuteList(localRelayURL string, muteListAuthors []string) ([]string, error) {
+    var wg sync.WaitGroup
+    var mu sync.Mutex
+    var allPubkeys []string
+    results := make(chan []string, 1)
+
+    wg.Add(1)
+    go func() {
+        defer wg.Done()
+
+        conn, _, err := websocket.DefaultDialer.Dial(localRelayURL, nil)
+        if err != nil {
+            log.Printf("Failed to connect to local relay %s: %v", localRelayURL, err)
+            return
+        }
+        defer conn.Close()
+
+        subscriptionID := "mutelist-fetch"
+
+        // Create the REQ message to fetch the mute list events by IDs.
+        req := []interface{}{"REQ", subscriptionID, map[string]interface{}{
+            "authors": muteListAuthors,
+            "kinds": []int{10000}, // Mute list events kind.
+        }}
+
+        reqJSON, err := json.Marshal(req)
+        if err != nil {
+            log.Printf("Failed to marshal request: %v", err)
+            return
+        }
+
+        err = conn.WriteMessage(websocket.TextMessage, reqJSON)
+        if err != nil {
+            log.Printf("Failed to send request to local relay %s: %v", localRelayURL, err)
+            return
+        }
+
+        // Listen for messages from the local relay.
+        for {
+            _, message, err := conn.ReadMessage()
+            if err != nil {
+                log.Printf("Error reading message from local relay %s: %v", localRelayURL, err)
+                break
+            }
+
+            // Log the raw message for debugging.
+            log.Printf("Received raw message: %s", message)
+
+            var response []interface{}
+            err = json.Unmarshal(message, &response)
+            if err != nil || len(response) < 2 {
+                log.Printf("Invalid message format or failed to unmarshal: %v", err)
+                continue
+            }
+
+            // Check for "EVENT" type messages.
+            eventType, ok := response[0].(string)
+            if !ok {
+                log.Printf("Unexpected event type: %v", response[0])
+                continue
+            }
+
+            if eventType == "EOSE" {
+                // End of subscription events; send a "CLOSE" message to the relay.
+                closeReq := []interface{}{"CLOSE", subscriptionID}
+                closeReqJSON, err := json.Marshal(closeReq)
+                if err != nil {
+                    log.Printf("Failed to marshal close request: %v", err)
+                } else {
+                    if err = conn.WriteMessage(websocket.TextMessage, closeReqJSON); err != nil {
+                        log.Printf("Failed to send close request to relay %s: %v", localRelayURL, err)
+                    } else {
+                        log.Println("Sent CLOSE request to end subscription.")
+                        
+                        // Wait for a potential response or timeout
+                        conn.SetReadDeadline(time.Now().Add(500 * time.Millisecond))
+                        _, _, err = conn.ReadMessage()
+                        if err != nil {
+                            if err == io.EOF {
+                                log.Println("Connection closed by the server after CLOSE request (EOF)")
+                            } else if websocket.IsCloseError(err, websocket.CloseNormalClosure, websocket.CloseGoingAway) {
+                                log.Println("WebSocket closed normally after CLOSE request")
+                            } else {
+                                log.Printf("Unexpected error after CLOSE request: %v", err)
+                            }
+                        }
+                    }
+                }
+                
+                // Ensure we break the loop after handling EOSE
+                break
+            }
+
+            if eventType == "EVENT" {
+                // Safely cast the event data from the third element.
+                if len(response) < 3 {
+                    log.Printf("Unexpected event format with insufficient data: %v", response)
+                    continue
+                }
+
+                eventData, ok := response[2].(map[string]interface{})
+                if !ok {
+                    log.Printf("Expected event data to be a map, got: %T", response[2])
+                    continue
+                }
+
+                // Log event data for debugging.
+                log.Printf("Event data received: %+v", eventData)
+
+                pubkeys := extractPubkeysFromMuteListEvent(eventData)
+                results <- pubkeys
+            }
+        }
+    }()
+
+    go func() {
+        wg.Wait()
+        close(results)
+    }()
+
+    // Collect results from the relay.
+    for pubkeys := range results {
+        mu.Lock()
+        allPubkeys = append(allPubkeys, pubkeys...)
+        mu.Unlock()
+    }
+
+    return allPubkeys, nil
+}
+
+// extractPubkeysFromMuteListEvent extracts pubkeys from a mute list event.
+func extractPubkeysFromMuteListEvent(eventData map[string]interface{}) []string {
+    var pubkeys []string
+
+    tags, ok := eventData["tags"].([]interface{})
+    if !ok {
+        log.Println("Tags field is missing or not an array")
+        return pubkeys
+    }
+
+    for _, tag := range tags {
+        tagArray, ok := tag.([]interface{})
+        if ok && len(tagArray) > 1 && tagArray[0] == "p" {
+            pubkey, ok := tagArray[1].(string)
+            if ok {
+                pubkeys = append(pubkeys, pubkey)
+            }
+        }
+    }
+
+    log.Printf("Extracted pubkeys: %v", pubkeys)
+    return pubkeys
+}

config/Whitelist.go

@@ -6,21 +6,19 @@ import (
 	"strconv"
 )
 
-// Helper function to check if a pubkey or npub is whitelisted
+// Check if a pubkey or npub is whitelisted
 func IsPubKeyWhitelisted(pubKey string) bool {
-	cfg := GetConfig()
+    cfg := GetWhitelistConfig()
     if !cfg.PubkeyWhitelist.Enabled {
         return true
     }
 
-	// Check pubkeys
     for _, whitelistedKey := range cfg.PubkeyWhitelist.Pubkeys {
         if pubKey == whitelistedKey {
             return true
         }
     }
 
-	// Check npubs
     for _, npub := range cfg.PubkeyWhitelist.Npubs {
         decodedPubKey, err := utils.DecodeNpub(npub)
         if err != nil {
@@ -35,13 +33,13 @@ func IsPubKeyWhitelisted(pubKey string) bool {
     return false
 }
 
+// Check if a kind is whitelisted
 func IsKindWhitelisted(kind int) bool {
-	cfg := GetConfig()
+    cfg := GetWhitelistConfig()
     if !cfg.KindWhitelist.Enabled {
         return true
     }
 
-	// Check event kinds
     for _, whitelistedKindStr := range cfg.KindWhitelist.Kinds {
         whitelistedKind, err := strconv.Atoi(whitelistedKindStr)
         if err != nil {

config/loadConfig.go

@@ -6,14 +6,21 @@ import (
 
 	configTypes "grain/config/types"
 
+	"grain/server/utils"
+
 	"gopkg.in/yaml.v2"
 )
 
 var (
     cfg            *configTypes.ServerConfig
+    whitelistCfg   *configTypes.WhitelistConfig
+    blacklistCfg   *configTypes.BlacklistConfig
     once           sync.Once
+    whitelistOnce  sync.Once
+    blacklistOnce  sync.Once
 )
 
+// LoadConfig loads the server configuration from config.yml
 func LoadConfig(filename string) (*configTypes.ServerConfig, error) {
     data, err := os.ReadFile(filename)
     if err != nil {
@@ -26,6 +33,9 @@ func LoadConfig(filename string) (*configTypes.ServerConfig, error) {
         return nil, err
     }
 
+    // Adjust event time constraints after loading
+	utils.AdjustEventTimeConstraints(&config)
+
     once.Do(func() {
         cfg = &config
     })
@@ -33,6 +43,54 @@ func LoadConfig(filename string) (*configTypes.ServerConfig, error) {
     return cfg, nil
 }
 
+// LoadWhitelistConfig loads the whitelist configuration from whitelist.yml
+func LoadWhitelistConfig(filename string) (*configTypes.WhitelistConfig, error) {
+    data, err := os.ReadFile(filename)
+    if err != nil {
+        return nil, err
+    }
+
+    var config configTypes.WhitelistConfig
+    err = yaml.Unmarshal(data, &config)
+    if err != nil {
+        return nil, err
+    }
+
+    whitelistOnce.Do(func() {
+        whitelistCfg = &config
+    })
+
+    return whitelistCfg, nil
+}
+
 func GetConfig() *configTypes.ServerConfig {
     return cfg
 }
+
+func GetWhitelistConfig() *configTypes.WhitelistConfig {
+    return whitelistCfg
+}
+
+// LoadBlacklistConfig loads the blacklist configuration from blacklist.yml
+func LoadBlacklistConfig(filename string) (*configTypes.BlacklistConfig, error) {
+    data, err := os.ReadFile(filename)
+    if err != nil {
+        return nil, err
+    }
+
+    var config configTypes.BlacklistConfig
+    err = yaml.Unmarshal(data, &config)
+    if err != nil {
+        return nil, err
+    }
+
+    blacklistOnce.Do(func() {
+        blacklistCfg = &config
+    })
+
+    return blacklistCfg, nil
+}
+
+func GetBlacklistConfig() *configTypes.BlacklistConfig {
+    return blacklistCfg
+}

config/types/blacklistConfig.go

@@ -8,4 +8,5 @@ type BlacklistConfig struct {
 	TempBanDuration           int      `yaml:"temp_ban_duration"`
 	PermanentBlacklistPubkeys []string `yaml:"permanent_blacklist_pubkeys"`
 	PermanentBlacklistNpubs   []string `yaml:"permanent_blacklist_npubs"`
+	MuteListAuthors           []string `yaml:"mutelist_authors"`
 }

config/types/serverConfig.go

@@ -1,5 +1,12 @@
 package config
 
+type EventTimeConstraints struct {
+	MinCreatedAt       int64  `yaml:"min_created_at"`        // Minimum allowed timestamp
+	MinCreatedAtString string `yaml:"min_created_at_string"` // Original string value for parsing (e.g., "now-5m")
+	MaxCreatedAt       int64  `yaml:"max_created_at"`        // Maximum allowed timestamp
+	MaxCreatedAtString string `yaml:"max_created_at_string"` // Original string value for parsing (e.g., "now+5m")
+}
+
 type ServerConfig struct {
 	MongoDB struct {
 		URI      string `yaml:"uri"`
@@ -7,18 +14,16 @@ type ServerConfig struct {
 	} `yaml:"mongodb"`
 	Server struct {
 		Port                      string `yaml:"port"`
-		ReadTimeout               int    `yaml:"read_timeout"`                 // Timeout in seconds
-		WriteTimeout              int    `yaml:"write_timeout"`                // Timeout in seconds
-		IdleTimeout               int    `yaml:"idle_timeout"`                 // Timeout in seconds
-		MaxConnections            int    `yaml:"max_connections"`              // Maximum number of concurrent connections
-		MaxSubscriptionsPerClient int    `yaml:"max_subscriptions_per_client"` // Maximum number of subscriptions per client
+		ReadTimeout               int    `yaml:"read_timeout"`
+		WriteTimeout              int    `yaml:"write_timeout"`
+		IdleTimeout               int    `yaml:"idle_timeout"`
+		MaxConnections            int    `yaml:"max_connections"`
+		MaxSubscriptionsPerClient int    `yaml:"max_subscriptions_per_client"`
 	} `yaml:"server"`
 	RateLimit            RateLimitConfig      `yaml:"rate_limit"`
-	PubkeyWhitelist PubkeyWhitelistConfig `yaml:"pubkey_whitelist"`
-	KindWhitelist   KindWhitelistConfig   `yaml:"kind_whitelist"`
-	DomainWhitelist DomainWhitelistConfig `yaml:"domain_whitelist"`
 	Blacklist            BlacklistConfig      `yaml:"blacklist"`
 	ResourceLimits       ResourceLimits       `yaml:"resource_limits"`
 	Auth                 AuthConfig           `yaml:"auth"`
 	EventPurge           EventPurgeConfig     `yaml:"event_purge"`
+	EventTimeConstraints EventTimeConstraints `yaml:"event_time_constraints"` // Added this field
 }

config/types/whitelistConfig.go

@@ -0,0 +1,19 @@
+package config
+
+type WhitelistConfig struct {
+	PubkeyWhitelist struct {
+		Enabled bool     `yaml:"enabled"`
+		Pubkeys []string `yaml:"pubkeys"`
+		Npubs   []string `yaml:"npubs"`
+	} `yaml:"pubkey_whitelist"`
+
+	KindWhitelist struct {
+		Enabled bool     `yaml:"enabled"`
+		Kinds   []string `yaml:"kinds"`
+	} `yaml:"kind_whitelist"`
+
+	DomainWhitelist struct {
+		Enabled bool     `yaml:"enabled"`
+		Domains []string `yaml:"domains"`
+	} `yaml:"domain_whitelist"`
+}

config/types/whitelistDomainConfig.go

@@ -1,6 +0,0 @@
-package config
-
-type DomainWhitelistConfig struct {
-	Enabled bool     `yaml:"enabled"`
-	Domains []string `yaml:"domains"`
-}

config/types/whitelistKindConfig.go

@@ -1,6 +0,0 @@
-package config
-
-type KindWhitelistConfig struct {
-	Enabled bool     `yaml:"enabled"`
-	Kinds   []string `yaml:"kinds"`
-}

config/types/whitelistPubkeyConfig.go

@@ -1,7 +0,0 @@
-package config
-
-type PubkeyWhitelistConfig struct {
-	Enabled bool     `yaml:"enabled"`
-	Pubkeys []string `yaml:"pubkeys"`
-	Npubs   []string `yaml:"npubs"`
-}

go.mod

@@ -4,6 +4,7 @@ go 1.22.2
 
 require (
 	github.com/btcsuite/btcd/btcec/v2 v2.3.4
+	github.com/gorilla/websocket v1.5.3
 	go.mongodb.org/mongo-driver v1.16.0
 	golang.org/x/net v0.27.0
 	gopkg.in/yaml.v2 v2.4.0

go.sum

@@ -28,6 +28,8 @@ github.com/golang/snappy v0.0.4 h1:yAGX7huGHXlcLOEtBnF4w7FQwA26wojNCwOYAEhLjQM=
 github.com/golang/snappy v0.0.4/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/jessevdk/go-flags v0.0.0-20141203071132-1679536dcc89/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 github.com/jrick/logrotate v1.0.0/go.mod h1:LNinyqDIJnpAur+b8yyulnQw/wDuN1+BYKlTRt3OuAQ=

main.go

@@ -22,28 +22,42 @@ import (
 
 func main() {
     utils.EnsureFileExists("config.yml", "app/static/examples/config.example.yml")
+    utils.EnsureFileExists("whitelist.yml", "app/static/examples/whitelist.example.yml")
+    utils.EnsureFileExists("blacklist.yml", "app/static/examples/blacklist.example.yml")
     utils.EnsureFileExists("relay_metadata.json", "app/static/examples/relay_metadata.example.json")
 
     restartChan := make(chan struct{})
-	go config.WatchConfigFile("config.yml", restartChan) // Critical goroutine
+    go config.WatchConfigFile("config.yml", restartChan)
+    go config.WatchConfigFile("whitelist.yml", restartChan)
+    go config.WatchConfigFile("blacklist.yml", restartChan)
+    go config.WatchConfigFile("relay_metadata.json", restartChan)
 
     signalChan := make(chan os.Signal, 1)
     signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
 
     var wg sync.WaitGroup
     for {
-		wg.Add(1) // Add to WaitGroup for the server goroutine
+        wg.Add(1)
 
         cfg, err := config.LoadConfig("config.yml")
         if err != nil {
             log.Fatal("Error loading config: ", err)
         }
 
-		// Start event purging in the background
+        _, err = config.LoadWhitelistConfig("whitelist.yml")
+        if err != nil {
+            log.Fatal("Error loading whitelist config: ", err)
+        }
+
+        _, err = config.LoadBlacklistConfig("blacklist.yml")
+        if err != nil {
+            log.Fatal("Error loading blacklist config: ", err)
+        }
+
+        // Start event purging in the background.
         go mongo.ScheduleEventPurging(cfg)
 
-		config.SetResourceLimit(&cfg.ResourceLimits) // Apply limits once before starting the server
-
+        config.SetResourceLimit(&cfg.ResourceLimits)
         client, err := mongo.InitDB(cfg)
         if err != nil {
             log.Fatal("Error initializing database: ", err)
@@ -51,7 +65,6 @@ func main() {
 
         config.SetRateLimit(cfg)
         config.SetSizeLimit(cfg)
-
         config.ClearTemporaryBans()
 
         err = utils.LoadRelayMetadataJSON()
@@ -60,22 +73,20 @@ func main() {
         }
 
         mux := setupRoutes()
-
-		// Start the server
         server := startServer(cfg, mux, &wg)
 
+        // Monitor for server restart or shutdown signals.
         select {
         case <-restartChan:
             log.Println("Restarting server...")
-			server.Close() // Stop the current server instance
-			wg.Wait()      // Wait for the server goroutine to finish
+            server.Close()
+            wg.Wait()
             time.Sleep(3 * time.Second)
-
         case <-signalChan:
             log.Println("Shutting down server...")
-			server.Close()             // Stop the server
-			mongo.DisconnectDB(client) // Disconnect from MongoDB
-			wg.Wait()                  // Wait for all goroutines to finish
+            server.Close()
+            mongo.DisconnectDB(client)
+            wg.Wait()
             return
         }
     }

server/db/mongo/purgeEvents.go

@@ -2,6 +2,7 @@ package mongo
 
 import (
 	"context"
+	"grain/config"
 	types "grain/config/types"
 	"grain/server/utils"
 	"log"
@@ -10,6 +11,7 @@ import (
 	"go.mongodb.org/mongo-driver/bson"
 )
 
+// PurgeOldEvents removes old events based on the configuration and a list of whitelisted pubkeys.
 func PurgeOldEvents(cfg *types.EventPurgeConfig, whitelist []string) {
 	if !cfg.Enabled {
 		return
@@ -21,10 +23,12 @@ func PurgeOldEvents(cfg *types.EventPurgeConfig, whitelist []string) {
 	// Calculate the cutoff time
 	cutoff := time.Now().AddDate(0, 0, -cfg.KeepDurationDays).Unix()
 
+	// Create the filter for purging old events
 	filter := bson.M{
 		"created_at": bson.M{"$lt": cutoff}, // Filter older events
 	}
 
+	// Exclude whitelisted pubkeys if specified in the config
 	if cfg.ExcludeWhitelisted && len(whitelist) > 0 {
 		filter["pubkey"] = bson.M{"$nin": whitelist} // Exclude whitelisted pubkeys
 	}
@@ -52,7 +56,6 @@ func PurgeOldEvents(cfg *types.EventPurgeConfig, whitelist []string) {
 	}
 }
 
-// Example of a periodic purging task
 // ScheduleEventPurging runs the event purging at a configurable interval.
 func ScheduleEventPurging(cfg *types.ServerConfig) {
 	// Use the purge interval from the configuration
@@ -61,22 +64,33 @@ func ScheduleEventPurging(cfg *types.ServerConfig) {
 	defer ticker.Stop()
 
 	for range ticker.C {
-		whitelist := getWhitelistedPubKeys(cfg)
+		// Fetch the whitelisted pubkeys without passing cfg directly
+		whitelist := getWhitelistedPubKeys()
 		PurgeOldEvents(&cfg.EventPurge, whitelist)
+		log.Printf("Purged old events, keeping whitelisted pubkeys: %v", whitelist)
 	}
 }
 
-// Fetch whitelisted pubkeys from both the config and any additional domains.
-func getWhitelistedPubKeys(cfg *types.ServerConfig) []string {
-	whitelistedPubkeys := cfg.PubkeyWhitelist.Pubkeys
+// Fetch whitelisted pubkeys from both the whitelist config and any additional domains.
+func getWhitelistedPubKeys() []string {
+	// Get the whitelist configuration
+	whitelistCfg := config.GetWhitelistConfig()
+	if whitelistCfg == nil {
+		log.Println("whitelistCfg is nil, returning an empty list of whitelisted pubkeys.")
+		return []string{}
+	}
+
+	// Start with the statically defined pubkeys
+	whitelistedPubkeys := whitelistCfg.PubkeyWhitelist.Pubkeys
 
 	// Fetch pubkeys from domains if domain whitelist is enabled
-	if cfg.DomainWhitelist.Enabled {
-		domains := cfg.DomainWhitelist.Domains
+	if whitelistCfg.DomainWhitelist.Enabled {
+		domains := whitelistCfg.DomainWhitelist.Domains
 		pubkeys, err := utils.FetchPubkeysFromDomains(domains)
 		if err != nil {
 			log.Printf("Error fetching pubkeys from domains: %v", err)
-			return whitelistedPubkeys // Return existing whitelisted pubkeys in case of error
+			// Return the existing statically whitelisted pubkeys in case of an error
+			return whitelistedPubkeys
 		}
 		// Append fetched pubkeys from domains to the whitelisted pubkeys
 		whitelistedPubkeys = append(whitelistedPubkeys, pubkeys...)

server/handlers/event.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"grain/config"
 	"grain/server/db/mongo"
+	"time"
 
 	"grain/server/handlers/response"
 	"grain/server/utils"
@@ -16,7 +17,6 @@ import (
 )
 
 func HandleEvent(ws *websocket.Conn, message []interface{}) {
-
 	if len(message) != 2 {
 		fmt.Println("Invalid EVENT message format")
 		response.SendNotice(ws, "", "Invalid EVENT message format")
@@ -44,13 +44,19 @@ func HandleEvent(ws *websocket.Conn, message []interface{}) {
 		return
 	}
 
+	// Validate event timestamps
+	if !validateEventTimestamp(evt) {
+		response.SendOK(ws, evt.ID, false, "invalid: event created_at timestamp is out of allowed range")
+		return
+	}
+
 	// Signature check moved here
 	if !utils.CheckSignature(evt) {
 		response.SendOK(ws, evt.ID, false, "invalid: signature verification failed")
 		return
 	}
 
-	eventSize := len(eventBytes) // Calculate event size
+	eventSize := len(eventBytes)
 
 	if !handleBlacklistAndWhitelist(ws, evt) {
 		return
@@ -60,38 +66,113 @@ func HandleEvent(ws *websocket.Conn, message []interface{}) {
 		return
 	}
 
-	// This is where I'll handle storage for multiple database types in the future
+	// Store the event in MongoDB or other storage
 	mongo.StoreMongoEvent(context.TODO(), evt, ws)
-
 	fmt.Println("Event processed:", evt.ID)
+}
 
+// Validate event timestamps against the configured min and max values
+func validateEventTimestamp(evt nostr.Event) bool {
+	cfg := config.GetConfig()
+	if cfg == nil {
+		fmt.Println("Server configuration is not loaded")
+		return false
+	}
+
+	// Use current time for max and a fixed date for min if not specified
+	now := time.Now().Unix()
+	minCreatedAt := cfg.EventTimeConstraints.MinCreatedAt
+	if minCreatedAt == 0 {
+		// Use January 1, 2020, as the default minimum timestamp
+		minCreatedAt = time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC).Unix()
+	}
+
+	maxCreatedAt := cfg.EventTimeConstraints.MaxCreatedAt
+	if maxCreatedAt == 0 {
+		// Default to the current time if not set
+		maxCreatedAt = now
+	}
+
+	// Check if the event's created_at timestamp falls within the allowed range
+	if evt.CreatedAt < minCreatedAt || evt.CreatedAt > maxCreatedAt {
+		fmt.Printf("Event %s created_at timestamp %d is out of range [%d, %d]\n", evt.ID, evt.CreatedAt, minCreatedAt, maxCreatedAt)
+		return false
+	}
+
+	return true
 }
 
 func handleBlacklistAndWhitelist(ws *websocket.Conn, evt nostr.Event) bool {
-	if config.GetConfig().DomainWhitelist.Enabled {
-		domains := config.GetConfig().DomainWhitelist.Domains
+    // Get the current whitelist configuration
+    whitelistCfg := config.GetWhitelistConfig()
+    if whitelistCfg == nil {
+        fmt.Println("Whitelist configuration is not loaded.")
+        response.SendNotice(ws, "", "Internal server error: whitelist configuration is missing")
+        return false
+    }
+
+    // If domain whitelisting is enabled, dynamically fetch pubkeys from domains
+    if whitelistCfg.DomainWhitelist.Enabled {
+        domains := whitelistCfg.DomainWhitelist.Domains
         pubkeys, err := utils.FetchPubkeysFromDomains(domains)
         if err != nil {
             fmt.Println("Error fetching pubkeys from domains:", err)
             response.SendNotice(ws, "", "Error fetching pubkeys from domains")
             return false
         }
-		for _, pubkey := range pubkeys {
-			config.GetConfig().PubkeyWhitelist.Pubkeys = append(config.GetConfig().PubkeyWhitelist.Pubkeys, pubkey)
-		}
+        // Update the whitelisted pubkeys dynamically
+        whitelistCfg.PubkeyWhitelist.Pubkeys = append(whitelistCfg.PubkeyWhitelist.Pubkeys, pubkeys...)
     }
 
+    // Check if the event's pubkey or content is blacklisted
     if blacklisted, msg := config.CheckBlacklist(evt.PubKey, evt.Content); blacklisted {
         response.SendOK(ws, evt.ID, false, msg)
         return false
     }
 
-	if config.GetConfig().KindWhitelist.Enabled && !config.IsKindWhitelisted(evt.Kind) {
+    // Check mutelist blacklist
+cfg := config.GetConfig()
+if cfg == nil {
+    fmt.Println("Server configuration is not loaded")
+    response.SendNotice(ws, "", "Internal server error: server configuration is missing")
+    return false
+}
+
+blacklistCfg := config.GetBlacklistConfig()
+if blacklistCfg == nil {
+    fmt.Println("Blacklist configuration is not loaded")
+    response.SendNotice(ws, "", "Internal server error: blacklist configuration is missing")
+    return false
+}
+
+// Only proceed if there are mutelist event IDs specified
+if len(blacklistCfg.MuteListAuthors) > 0 {
+    localRelayURL := fmt.Sprintf("ws://localhost%s", cfg.Server.Port)
+    mutelistedPubkeys, err := config.FetchPubkeysFromLocalMuteList(localRelayURL, blacklistCfg.MuteListAuthors)
+    if err != nil {
+        fmt.Println("Error fetching pubkeys from mutelist:", err)
+        response.SendNotice(ws, "", "Error fetching pubkeys from mutelist")
+        return false
+    }
+
+    for _, mutelistedPubkey := range mutelistedPubkeys {
+        if evt.PubKey == mutelistedPubkey {
+            response.SendOK(ws, evt.ID, false, "not allowed: pubkey is in mutelist")
+            return false
+        }
+    }
+} else {
+    fmt.Println("No mutelist event IDs specified in the blacklist configuration")
+}
+
+    // Check if the event's kind is whitelisted
+    if whitelistCfg.KindWhitelist.Enabled && !config.IsKindWhitelisted(evt.Kind) {
         response.SendOK(ws, evt.ID, false, "not allowed: event kind is not whitelisted")
         return false
     }
 
-	if config.GetConfig().PubkeyWhitelist.Enabled && !config.IsPubKeyWhitelisted(evt.PubKey) {
+    // Check if the event's pubkey is whitelisted
+    if whitelistCfg.PubkeyWhitelist.Enabled && !config.IsPubKeyWhitelisted(evt.PubKey) {
         response.SendOK(ws, evt.ID, false, "not allowed: pubkey or npub is not whitelisted")
         return false
     }

server/utils/adjustTimeContraints.go

@@ -0,0 +1,43 @@
+package utils
+
+import (
+	"fmt"
+	config "grain/config/types"
+	"strings"
+	"time"
+)
+
+// Adjusts the event time constraints based on the configuration
+func AdjustEventTimeConstraints(cfg *config.ServerConfig) {
+	now := time.Now()
+
+	// Adjust min_created_at based on string value or default to January 1, 2020
+	if strings.HasPrefix(cfg.EventTimeConstraints.MinCreatedAtString, "now") {
+		offset := strings.TrimPrefix(cfg.EventTimeConstraints.MinCreatedAtString, "now")
+		duration, err := time.ParseDuration(offset)
+		if err != nil {
+			fmt.Printf("Invalid time offset for min_created_at: %s\n", offset)
+			cfg.EventTimeConstraints.MinCreatedAt = time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC).Unix()
+		} else {
+			cfg.EventTimeConstraints.MinCreatedAt = now.Add(duration).Unix()
+		}
+	} else if cfg.EventTimeConstraints.MinCreatedAt == 0 {
+		// Default to January 1, 2020, if not set
+		cfg.EventTimeConstraints.MinCreatedAt = time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC).Unix()
+	}
+
+	// Adjust max_created_at based on string value or default to current time
+	if strings.HasPrefix(cfg.EventTimeConstraints.MaxCreatedAtString, "now") {
+		offset := strings.TrimPrefix(cfg.EventTimeConstraints.MaxCreatedAtString, "now")
+		duration, err := time.ParseDuration(offset)
+		if err != nil {
+			fmt.Printf("Invalid time offset for max_created_at: %s\n", offset)
+			cfg.EventTimeConstraints.MaxCreatedAt = now.Unix() // Default to now if parsing fails
+		} else {
+			cfg.EventTimeConstraints.MaxCreatedAt = now.Add(duration).Unix()
+		}
+	} else if cfg.EventTimeConstraints.MaxCreatedAt == 0 {
+		// Default to the current time if it's set to zero and no "now" keyword is used
+		cfg.EventTimeConstraints.MaxCreatedAt = now.Unix()
+	}
+}