mirror of
https://github.com/0ceanSlim/grain.git
synced 2024-10-30 01:26:32 +00:00
172 lines
4.7 KiB
Go
172 lines
4.7 KiB
Go
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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"grain/config"
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"grain/server/db"
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"grain/server/handlers/kinds"
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"grain/server/handlers/response"
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"grain/server/utils"
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relay "grain/server/types"
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"golang.org/x/net/websocket"
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)
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func HandleEvent(ws *websocket.Conn, message []interface{}) {
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utils.LimitedGoRoutine(func() {
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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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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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var evt relay.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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// 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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eventSize := len(eventBytes) // Calculate event size
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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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storeEvent(context.TODO(), evt, ws)
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fmt.Println("Event processed:", evt.ID)
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})
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}
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func handleBlacklistAndWhitelist(ws *websocket.Conn, evt relay.Event) bool {
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if config.GetConfig().DomainWhitelist.Enabled {
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domains := config.GetConfig().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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for _, pubkey := range pubkeys {
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config.GetConfig().PubkeyWhitelist.Pubkeys = append(config.GetConfig().PubkeyWhitelist.Pubkeys, pubkey)
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}
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}
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if blacklisted, msg := utils.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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if config.GetConfig().KindWhitelist.Enabled && !utils.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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if config.GetConfig().PubkeyWhitelist.Enabled && !utils.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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}
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func handleRateAndSizeLimits(ws *websocket.Conn, evt relay.Event, eventSize int) bool {
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rateLimiter := config.GetRateLimiter()
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sizeLimiter := config.GetSizeLimiter()
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category := determineCategory(evt.Kind)
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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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return false
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}
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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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return false
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}
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return true
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}
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func storeEvent(ctx context.Context, evt relay.Event, ws *websocket.Conn) {
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collection := db.GetCollection(evt.Kind)
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var err error
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switch {
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case evt.Kind == 0:
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err = kinds.HandleKind0(ctx, evt, collection, ws)
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case evt.Kind == 1:
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err = kinds.HandleKind1(ctx, evt, collection, ws)
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case evt.Kind == 2:
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err = kinds.HandleKind2(ctx, evt, ws)
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case evt.Kind == 3:
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err = kinds.HandleReplaceableKind(ctx, evt, collection, ws)
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case evt.Kind == 5:
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err = kinds.HandleKind5(ctx, evt, db.GetClient(), ws)
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case evt.Kind >= 4 && evt.Kind < 45:
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err = kinds.HandleRegularKind(ctx, evt, collection, ws)
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case evt.Kind >= 1000 && evt.Kind < 10000:
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err = kinds.HandleRegularKind(ctx, evt, collection, ws)
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case evt.Kind >= 10000 && evt.Kind < 20000:
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err = kinds.HandleReplaceableKind(ctx, evt, collection, ws)
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case evt.Kind >= 20000 && evt.Kind < 30000:
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fmt.Println("Ephemeral event received and ignored:", evt.ID)
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case evt.Kind >= 30000 && evt.Kind < 40000:
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err = kinds.HandleParameterizedReplaceableKind(ctx, evt, collection, ws)
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default:
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err = kinds.HandleUnknownKind(ctx, evt, collection, ws)
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}
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if err != nil {
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response.SendOK(ws, evt.ID, false, fmt.Sprintf("error: %v", err))
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return
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}
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response.SendOK(ws, evt.ID, true, "")
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}
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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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