diff --git a/app/Util/ActivityPub/Inbox.php b/app/Util/ActivityPub/Inbox.php
index 7a0484d7a..83d5578f9 100644
--- a/app/Util/ActivityPub/Inbox.php
+++ b/app/Util/ActivityPub/Inbox.php
@@ -2,18 +2,30 @@
 
 namespace App\Util\ActivityPub;
 
-use App\Like;
-use App\Profile;
+use Cache, DB, Log, Redis, Validator;
+use App\{
+    Activity,
+    Follower,
+    FollowRequest,
+    Like,
+    Notification,
+    Profile,
+    Status
+};
+use Carbon\Carbon;
+use App\Util\ActivityPub\Helpers;
+use App\Jobs\LikePipeline\LikePipeline;
 
 class Inbox
 {
-    protected $request;
+    protected $headers;
     protected $profile;
     protected $payload;
+    protected $logger;
 
-    public function __construct($request, Profile $profile, $payload)
+    public function __construct($headers, $profile, $payload)
     {
-        $this->request = $request;
+        $this->headers = $headers;
         $this->profile = $profile;
         $this->payload = $payload;
     }
@@ -25,15 +37,31 @@ class Inbox
 
     public function authenticatePayload()
     {
-        // todo
+        try {
+           $signature = Helpers::validateSignature($this->headers, $this->payload);
+           $payload = Helpers::validateObject($this->payload);
+           if($signature == false) {
+            return;
+           }
+        } catch (Exception $e) {
+           return; 
+        }
+        $this->payloadLogger(); 
+    }
 
+    public function payloadLogger()
+    {
+        $logger = new Activity;
+        $logger->data = json_encode($this->payload);
+        $logger->save();
+        $this->logger = $logger;
+        Log::info('AP:inbox:activity:new:'.$this->logger->id);
         $this->handleVerb();
     }
 
     public function handleVerb()
     {
         $verb = $this->payload['type'];
-
         switch ($verb) {
             case 'Create':
                 $this->handleCreateActivity();
@@ -43,43 +71,254 @@ class Inbox
                 $this->handleFollowActivity();
                 break;
 
+            case 'Announce':
+                $this->handleAnnounceActivity();
+                break;
+
+            case 'Accept':
+                $this->handleAcceptActivity();
+                break;
+
+            case 'Delete':
+                $this->handleDeleteActivity();
+                break;
+
+            case 'Like':
+                $this->handleLikeActivity();
+                break;
+
+            case 'Reject':
+                $this->handleRejectActivity();
+                break;
+
+            case 'Undo':
+                $this->handleUndoActivity();
+                break;
+
             default:
                 // TODO: decide how to handle invalid verbs.
                 break;
         }
     }
 
-    public function handleCreateActivity()
+    public function verifyNoteAttachment()
     {
-        // todo
-    }
+        $activity = $this->payload['object'];
 
-    public function handleFollowActivity()
-    {
-        $actor = $this->payload['object'];
-        $target = $this->profile;
+        if(isset($activity['inReplyTo']) && 
+            !empty($activity['inReplyTo']) && 
+            Helpers::validateUrl($activity['inReplyTo'])
+        ) {
+            // reply detected, skip attachment check
+            return true;
+        }
+
+        $valid = Helpers::verifyAttachments($activity);
+
+        return $valid;
     }
 
     public function actorFirstOrCreate($actorUrl)
     {
-        if (Profile::whereRemoteUrl($actorUrl)->count() !== 0) {
-            return Profile::whereRemoteUrl($actorUrl)->firstOrFail();
+        return Helpers::profileFirstOrNew($actorUrl);
+    }
+
+    public function handleCreateActivity()
+    {
+        $activity = $this->payload['object'];
+        if(!$this->verifyNoteAttachment()) {
+            return;
+        }
+        if($activity['type'] == 'Note' && !empty($activity['inReplyTo'])) {
+            $this->handleNoteReply();
+
+        } elseif($activity['type'] == 'Note' && !empty($activity['attachment'])) {
+            $this->handleNoteCreate();
+        }
+    }
+
+    public function handleNoteReply()
+    {
+        $activity = $this->payload['object'];
+        $actor = $this->actorFirstOrCreate($this->payload['actor']);
+        $inReplyTo = $activity['inReplyTo'];
+        
+        if(!Helpers::statusFirstOrFetch($activity['url'], true)) {
+            $this->logger->delete();
+            return;
         }
 
-        $res = (new DiscoverActor($url))->discover();
+        $this->logger->to_id = $this->profile->id;
+        $this->logger->from_id = $actor->id;
+        $this->logger->processed_at = Carbon::now();
+        $this->logger->save();
+    }
 
-        $domain = parse_url($res['url'], PHP_URL_HOST);
-        $username = $res['preferredUsername'];
-        $remoteUsername = "@{$username}@{$domain}";
+    public function handleNoteCreate()
+    {
+        $activity = $this->payload['object'];
+        $actor = $this->actorFirstOrCreate($this->payload['actor']);
+        if(!$actor || $actor->domain == null) {
+            return;
+        }
 
-        $profile = new Profile();
-        $profile->user_id = null;
-        $profile->domain = $domain;
-        $profile->username = $remoteUsername;
-        $profile->name = $res['name'];
-        $profile->bio = str_limit($res['summary'], 125);
-        $profile->sharedInbox = $res['endpoints']['sharedInbox'];
-        $profile->remote_url = $res['url'];
-        $profile->save();
+        if(Helpers::userInAudience($this->profile, $this->payload) == false) {
+            //Log::error('AP:inbox:userInAudience:false - Activity#'.$this->logger->id);
+            $logger = Activity::find($this->logger->id);
+            $logger->delete();
+            return;
+        }
+
+        if(Status::whereUrl($activity['url'])->exists()) {
+            return;
+        }
+
+        $status = DB::transaction(function() use($activity, $actor) {
+            $status = new Status;
+            $status->profile_id = $actor->id;
+            $status->caption = strip_tags($activity['content']);
+            $status->visibility = $status->scope = 'public';
+            $status->url = $activity['url'];
+            $status->save();
+            return $status;
+        });
+
+        Helpers::importNoteAttachment($activity, $status);
+
+        $logger = Activity::find($this->logger->id);
+        $logger->to_id = $this->profile->id;
+        $logger->from_id = $actor->id;
+        $logger->processed_at = Carbon::now();
+        $logger->save();
+    }
+
+    public function handleFollowActivity()
+    {
+        $actor = $this->actorFirstOrCreate($this->payload['actor']);
+        if(!$actor || $actor->domain == null) {
+            return;
+        }
+        $target = $this->profile;
+        if($target->is_private == true) {
+            // make follow request
+            FollowRequest::firstOrCreate([
+                'follower_id' => $actor->id,
+                'following_id' => $target->id
+            ]);
+            // todo: send notification
+        } else {
+            // store new follower
+            $follower = Follower::firstOrCreate([
+                'profile_id' => $actor->id,
+                'following_id' => $target->id,
+                'local_profile' => empty($actor->domain)
+            ]);
+            if($follower->wasRecentlyCreated == false) {
+                $this->logger->delete();
+                return;
+            }
+            // send notification
+            $notification = new Notification();
+            $notification->profile_id = $target->id;
+            $notification->actor_id = $actor->id;
+            $notification->action = 'follow';
+            $notification->message = $follower->toText();
+            $notification->rendered = $follower->toHtml();
+            $notification->item_id = $target->id;
+            $notification->item_type = "App\Profile";
+            $notification->save();
+
+            \Cache::forever('notification.'.$notification->id, $notification);
+
+            $redis = Redis::connection();
+
+            $nkey = config('cache.prefix').':user.'.$target->id.'.notifications';
+            $redis->lpush($nkey, $notification->id);
+            
+            // send Accept to remote profile
+            $accept = [
+                '@context' => 'https://www.w3.org/ns/activitystreams',
+                'id'       => $follower->permalink('/accept'),
+                'type'     => 'Accept',
+                'actor'    => $target->permalink(),
+                'object'   => [
+                    'id' => $this->payload['id'],
+                    'type'  => 'Follow',
+                    'actor' => $target->permalink(),
+                    'object' => $actor->permalink()
+                ]
+            ];
+            Helpers::sendSignedObject($target, $actor->inbox_url, $accept);
+        }
+        $this->logger->to_id = $target->id;
+        $this->logger->from_id = $actor->id;
+        $this->logger->processed_at = Carbon::now();
+        $this->logger->save();
+    }
+
+    public function handleAnnounceActivity()
+    {
+
+    }
+
+    public function handleAcceptActivity()
+    {
+
+    }
+
+    public function handleDeleteActivity()
+    {
+
+    }
+
+    public function handleLikeActivity()
+    {
+        $actor = $this->payload['actor'];
+        $profile = self::actorFirstOrCreate($actor);
+        $obj = $this->payload['object'];
+        if(Helpers::validateLocalUrl($obj) == false) {
+            return;
+        }
+        $status = Helpers::statusFirstOrFetch($obj);
+        $like = Like::firstOrCreate([
+            'profile_id' => $profile->id,
+            'status_id' => $status->id
+        ]);
+
+        if($like->wasRecentlyCreated == false) {
+            return;
+        }
+        LikePipeline::dispatch($like);
+        $this->logger->to_id = $status->profile_id;
+        $this->logger->from_id = $profile->id;
+        $this->logger->processed_at = Carbon::now();
+        $this->logger->save();
+    }
+
+
+    public function handleRejectActivity()
+    {
+
+    }
+
+    public function handleUndoActivity()
+    {
+        $actor = $this->payload['actor'];
+        $profile = self::actorFirstOrCreate($actor);
+        $obj = $this->payload['object'];
+        $status = Helpers::statusFirstOrFetch($obj['object']);
+
+        switch ($obj['type']) {
+            case 'Like':
+                Like::whereProfileId($profile->id)
+                    ->whereStatusId($status->id)
+                    ->delete();
+                break;
+        }
+
+        $this->logger->to_id = $status->profile_id;
+        $this->logger->from_id = $profile->id;
+        $this->logger->processed_at = Carbon::now();
+        $this->logger->save();
     }
 }