2024-07-23 17:57:21 +00:00
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package handlers
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import (
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"context"
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"encoding/json"
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"fmt"
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2024-07-30 15:27:38 +00:00
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"grain/config"
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2024-09-17 14:35:31 +00:00
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"grain/server/db/mongo"
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2024-09-02 00:51:02 +00:00
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2024-07-31 18:12:33 +00:00
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"grain/server/handlers/response"
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"grain/server/utils"
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2024-07-23 17:57:21 +00:00
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2024-09-02 00:51:02 +00:00
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nostr "grain/server/types"
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2024-07-23 17:57:21 +00:00
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"golang.org/x/net/websocket"
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)
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2024-07-25 13:57:24 +00:00
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func HandleEvent(ws *websocket.Conn, message []interface{}) {
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2024-07-23 17:57:21 +00:00
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2024-09-15 22:53:28 +00:00
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if len(message) != 2 {
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fmt.Println("Invalid EVENT message format")
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response.SendNotice(ws, "", "Invalid EVENT message format")
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return
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}
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2024-07-23 17:57:21 +00:00
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2024-09-15 22:53:28 +00:00
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eventData, ok := message[1].(map[string]interface{})
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if !ok {
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fmt.Println("Invalid event data format")
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response.SendNotice(ws, "", "Invalid event data format")
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return
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}
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eventBytes, err := json.Marshal(eventData)
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if err != nil {
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fmt.Println("Error marshaling event data:", err)
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response.SendNotice(ws, "", "Error marshaling event data")
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return
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}
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2024-07-23 17:57:21 +00:00
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2024-09-15 22:53:28 +00:00
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var evt nostr.Event
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err = json.Unmarshal(eventBytes, &evt)
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if err != nil {
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fmt.Println("Error unmarshaling event data:", err)
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response.SendNotice(ws, "", "Error unmarshaling event data")
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return
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}
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2024-08-30 20:00:41 +00:00
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2024-09-15 22:53:28 +00:00
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// Signature check moved here
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if !utils.CheckSignature(evt) {
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response.SendOK(ws, evt.ID, false, "invalid: signature verification failed")
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return
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}
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2024-08-30 19:51:46 +00:00
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2024-09-15 22:53:28 +00:00
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eventSize := len(eventBytes) // Calculate event size
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2024-08-30 19:51:46 +00:00
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2024-09-15 22:53:28 +00:00
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if !handleBlacklistAndWhitelist(ws, evt) {
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return
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}
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if !handleRateAndSizeLimits(ws, evt, eventSize) {
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return
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}
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// This is where I'll handle storage for multiple database types in the future
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2024-09-17 14:35:31 +00:00
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mongo.StoreMongoEvent(context.TODO(), evt, ws)
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2024-08-30 19:51:46 +00:00
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2024-09-15 22:53:28 +00:00
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fmt.Println("Event processed:", evt.ID)
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2024-07-23 17:57:21 +00:00
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}
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2024-09-02 00:51:02 +00:00
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func handleBlacklistAndWhitelist(ws *websocket.Conn, evt nostr.Event) bool {
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2024-10-16 18:07:37 +00:00
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// Get the current whitelist configuration
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2024-10-16 13:57:58 +00:00
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whitelistCfg := config.GetWhitelistConfig()
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2024-10-16 18:07:37 +00:00
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if whitelistCfg == nil {
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fmt.Println("Whitelist configuration is not loaded.")
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response.SendNotice(ws, "", "Internal server error: whitelist configuration is missing")
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return false
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}
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2024-10-16 13:57:58 +00:00
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// If domain whitelisting is enabled, dynamically fetch pubkeys from domains
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if whitelistCfg.DomainWhitelist.Enabled {
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domains := whitelistCfg.DomainWhitelist.Domains
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pubkeys, err := utils.FetchPubkeysFromDomains(domains)
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if err != nil {
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fmt.Println("Error fetching pubkeys from domains:", err)
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response.SendNotice(ws, "", "Error fetching pubkeys from domains")
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return false
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}
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// Update the whitelisted pubkeys dynamically
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whitelistCfg.PubkeyWhitelist.Pubkeys = append(whitelistCfg.PubkeyWhitelist.Pubkeys, pubkeys...)
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}
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// Check if the event's pubkey or content is blacklisted
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if blacklisted, msg := config.CheckBlacklist(evt.PubKey, evt.Content); blacklisted {
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response.SendOK(ws, evt.ID, false, msg)
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return false
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}
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2024-10-17 21:05:33 +00:00
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// Check mutelist blacklist
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cfg := config.GetConfig()
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if cfg == nil {
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fmt.Println("Server configuration is not loaded")
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response.SendNotice(ws, "", "Internal server error: server configuration is missing")
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return false
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}
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blacklistCfg := config.GetBlacklistConfig()
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if blacklistCfg == nil {
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fmt.Println("Blacklist configuration is not loaded")
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response.SendNotice(ws, "", "Internal server error: blacklist configuration is missing")
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return false
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}
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// Only proceed if there are mutelist event IDs specified
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if len(blacklistCfg.MuteListEventIDs) > 0 {
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localRelayURL := fmt.Sprintf("ws://localhost%s", cfg.Server.Port)
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mutelistedPubkeys, err := config.FetchPubkeysFromLocalMuteList(localRelayURL, blacklistCfg.MuteListEventIDs)
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if err != nil {
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fmt.Println("Error fetching pubkeys from mutelist:", err)
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response.SendNotice(ws, "", "Error fetching pubkeys from mutelist")
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return false
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}
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for _, mutelistedPubkey := range mutelistedPubkeys {
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if evt.PubKey == mutelistedPubkey {
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response.SendOK(ws, evt.ID, false, "not allowed: pubkey is in mutelist")
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return false
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}
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}
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} else {
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fmt.Println("No mutelist event IDs specified in the blacklist configuration")
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}
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2024-10-16 13:57:58 +00:00
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// Check if the event's kind is whitelisted
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if whitelistCfg.KindWhitelist.Enabled && !config.IsKindWhitelisted(evt.Kind) {
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response.SendOK(ws, evt.ID, false, "not allowed: event kind is not whitelisted")
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return false
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}
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// Check if the event's pubkey is whitelisted
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if whitelistCfg.PubkeyWhitelist.Enabled && !config.IsPubKeyWhitelisted(evt.PubKey) {
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response.SendOK(ws, evt.ID, false, "not allowed: pubkey or npub is not whitelisted")
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return false
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}
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return true
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2024-08-30 19:51:46 +00:00
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}
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2024-10-16 18:07:37 +00:00
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2024-09-02 00:51:02 +00:00
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func handleRateAndSizeLimits(ws *websocket.Conn, evt nostr.Event, eventSize int) bool {
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2024-08-30 19:51:46 +00:00
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rateLimiter := config.GetRateLimiter()
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sizeLimiter := config.GetSizeLimiter()
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2024-07-27 14:06:34 +00:00
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category := determineCategory(evt.Kind)
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2024-07-25 13:57:24 +00:00
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2024-07-26 14:02:34 +00:00
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if allowed, msg := rateLimiter.AllowEvent(evt.Kind, category); !allowed {
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response.SendOK(ws, evt.ID, false, msg)
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2024-08-30 19:51:46 +00:00
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return false
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2024-07-25 13:57:24 +00:00
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}
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2024-07-26 20:46:01 +00:00
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if allowed, msg := sizeLimiter.AllowSize(evt.Kind, eventSize); !allowed {
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response.SendOK(ws, evt.ID, false, msg)
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2024-08-30 19:51:46 +00:00
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return false
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}
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return true
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}
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2024-07-27 14:06:34 +00:00
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func determineCategory(kind int) string {
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switch {
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case kind == 0, kind == 3, kind >= 10000 && kind < 20000:
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return "replaceable"
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case kind == 1, kind >= 4 && kind < 45, kind >= 1000 && kind < 10000:
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return "regular"
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case kind == 2:
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return "deprecated"
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case kind >= 20000 && kind < 30000:
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return "ephemeral"
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case kind >= 30000 && kind < 40000:
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return "parameterized_replaceable"
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default:
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return "unknown"
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}
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}
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