diff --git a/src/status_im/accounts/handlers.cljs b/src/status_im/accounts/handlers.cljs
index 20835e7bbe..c98cdc2cdf 100644
--- a/src/status_im/accounts/handlers.cljs
+++ b/src/status_im/accounts/handlers.cljs
@@ -31,9 +31,9 @@
 (register-handler
   :add-account
   ((after save-account)
-    (fn [{:keys [network] :as db} [_ {:keys [address] :as account}]]
-      (let [account' (assoc account :network network)]
-        (update db :accounts assoc address account')))))
+   (fn [{:keys [network] :as db} [_ {:keys [address] :as account}]]
+     (let [account' (assoc account :network network)]
+       (update db :accounts assoc address account')))))
 
 (defn account-created [result password]
   (let [data       (json->clj result)
diff --git a/src/status_im/accounts/specs.cljs b/src/status_im/accounts/specs.cljs
new file mode 100644
index 0000000000..4b2788b69f
--- /dev/null
+++ b/src/status_im/accounts/specs.cljs
@@ -0,0 +1,9 @@
+(ns status-im.accounts.specs
+  (:require [cljs.spec.alpha :as s]))
+
+(s/def :accounts/accounts map?)                                     ;;{id (string) account (map)} all created accounts
+(s/def :accounts/account-creation? (s/nilable boolean?))            ;;true during creating new account
+(s/def :accounts/creating-account? boolean?)                        ;;what is the difference ? ^
+(s/def :accounts/current-account-id (s/nilable string?))            ;;id of logged in account
+(s/def :accounts/recover map?)                                      ;;used during recovering account
+(s/def :accounts/login map?)                                        ;;used during logging
\ No newline at end of file
diff --git a/src/status_im/android/core.cljs b/src/status_im/android/core.cljs
index d069a60526..1e10797de4 100644
--- a/src/status_im/android/core.cljs
+++ b/src/status_im/android/core.cljs
@@ -3,6 +3,7 @@
             [re-frame.core :refer [subscribe dispatch dispatch-sync]]
             [status-im.handlers]
             [status-im.subs]
+            [status-im.specs]
             [status-im.components.react :refer [app-registry
                                                 app-state
                                                 keyboard
@@ -176,5 +177,4 @@
   (dispatch [:initialize-crypt])
   (dispatch [:initialize-geth])
   (status/set-soft-input-mode status/adjust-resize)
-  (dispatch [:load-user-phone-number])
   (init-back-button-handler!))
diff --git a/src/status_im/chat/handlers.cljs b/src/status_im/chat/handlers.cljs
index 1f8cc006fe..94402458ab 100644
--- a/src/status_im/chat/handlers.cljs
+++ b/src/status_im/chat/handlers.cljs
@@ -100,7 +100,6 @@
 (register-handler :cancel-command
   (fn [{:keys [current-chat-id] :as db} _]
     (-> db
-        (dissoc :canceled-command)
         (assoc-in [:chats current-chat-id :command-input] {})
         (update-in [:chats current-chat-id :input-text] safe-trim))))
 
@@ -154,11 +153,10 @@
   (fn [db [_ phone-number message-id]]
     (sign-up-service/start-listening-confirmation-code-sms)
     (let [formatted (format-phone-number phone-number)]
-      (-> db
-          (assoc :user-phone-number formatted)
-          (server/sign-up formatted
-                          message-id
-                          sign-up-service/on-sign-up-response)))))
+      (server/sign-up db
+                      formatted
+                      message-id
+                      sign-up-service/on-sign-up-response))))
 
 (register-handler :start-listening-confirmation-code-sms
   (fn [db [_ listener]]
@@ -261,7 +259,6 @@
   [{:keys [current-chat-id current-account-id] :as db} [_ _ id]]
   (let [chat-id           (or id current-chat-id)
         messages          (get-in db [:chats chat-id :messages])
-        command?          (= :command (get-in db [:edit-mode chat-id]))
         db'               (-> db
                               (assoc :current-chat-id chat-id)
                               (assoc-in [:chats chat-id :was-opened?] true))
@@ -291,18 +288,18 @@
 (register-handler :add-chat-loaded-callback
   (fn [db [_ chat-id callback]]
     (log/debug "Add chat loaded callback: " chat-id callback)
-    (update-in db [::chat-loaded-callbacks chat-id] conj callback)))
+    (update-in db [:chat-loaded-callbacks chat-id] conj callback)))
 
 (register-handler ::clear-chat-loaded-callbacks
   (fn [db [_ chat-id]]
     (log/debug "Clear chat loaded callback: " chat-id)
-    (assoc-in db [::chat-loaded-callbacks chat-id] nil)))
+    (assoc-in db [:chat-loaded-callbacks chat-id] nil)))
 
 (register-handler :invoke-chat-loaded-callbacks
   (u/side-effect!
     (fn [db [_ chat-id]]
       (log/debug "Invoking chat loaded callbacks: " chat-id)
-      (let [callbacks (get-in db [::chat-loaded-callbacks chat-id])]
+      (let [callbacks (get-in db [:chat-loaded-callbacks chat-id])]
         (log/debug "Invoking chat loaded callbacks: " callbacks)
         (doseq [callback callbacks]
           (callback))
diff --git a/src/status_im/chat/handlers/unviewed_messages.cljs b/src/status_im/chat/handlers/unviewed_messages.cljs
index 45196cf146..f351e7f28c 100644
--- a/src/status_im/chat/handlers/unviewed_messages.cljs
+++ b/src/status_im/chat/handlers/unviewed_messages.cljs
@@ -4,7 +4,7 @@
             [status-im.data-store.messages :as messages]))
 
 (defn set-unviewed-messages [db]
-  (let [messages (->> (::raw-unviewed-messages db)
+  (let [messages (->> (:raw-unviewed-messages db)
                       (group-by :chat-id)
                       (map (fn [[id messages]]
                              [id {:messages-ids (map :message-id messages)
@@ -12,11 +12,11 @@
                       (into {}))]
     (-> db
         (assoc :unviewed-messages messages)
-        (dissoc ::raw-unviewed-messages))))
+        (dissoc :raw-unviewed-messages))))
 
 (defn load-messages! [db]
   (let [messages (messages/get-unviewed)]
-    (assoc db ::raw-unviewed-messages messages)))
+    (assoc db :raw-unviewed-messages messages)))
 
 (register-handler ::set-unviewed-messages set-unviewed-messages)
 
diff --git a/src/status_im/chat/specs.cljs b/src/status_im/chat/specs.cljs
new file mode 100644
index 0000000000..bff592edf3
--- /dev/null
+++ b/src/status_im/chat/specs.cljs
@@ -0,0 +1,30 @@
+(ns status-im.chat.specs
+  (:require [cljs.spec.alpha :as s]))
+
+(s/def :chat/chats map?)                                        ;; {id (string) chat (map)} active chats on chat's tab
+(s/def :chat/current-chat-id string?)                           ;;current or last opened chat-id
+(s/def :chat/chat-id string?)                                   ;;what is the difference ? ^
+(s/def :chat/new-chat map?)                                     ;;used during adding new chat
+(s/def :chat/new-chat-name string?)                             ;;we have name in the new-chat why do we need this field
+(s/def :chat/chat-animations map?)                              ;;{id (string) props (map)}
+(s/def :chat/chat-ui-props map?)                                ;;{id (string) props (map)}
+(s/def :chat/chat-list-ui-props map?)
+(s/def :chat/layout-height number?)                             ;;height of chat's view layout
+(s/def :chat/expandable-view-height-to-value number?)
+(s/def :chat/global-commands map?)                              ; {key (keyword) command (map)} atm used for browse command
+(s/def :chat/loading-allowed boolean?)                          ;;allow to load more messages
+(s/def :chat/message-data map?)
+(s/def :chat/message-id->transaction-id map?)
+(s/def :chat/message-status map?)
+(s/def :chat/unviewed-messages (s/nilable map?))
+(s/def :chat/selected-participants set?)
+(s/def :chat/chat-loaded-callbacks map?)
+(s/def :chat/commands-callbacks map?)
+(s/def :chat/command-hash-valid? boolean?)
+(s/def :chat/public-group-topic string?)
+(s/def :chat/confirmation-code-sms-listener any?)               ; .addListener result object
+(s/def :chat/messages seq?)
+(s/def :chat/loaded-chats seq?)
+(s/def :chat/bot-subscriptions map?)
+(s/def :chat/new-request map?)
+(s/def :chat/raw-unviewed-messages vector?)
\ No newline at end of file
diff --git a/src/status_im/commands/handlers/loading.cljs b/src/status_im/commands/handlers/loading.cljs
index 7f23ee370b..8ad9e0eff6 100644
--- a/src/status_im/commands/handlers/loading.cljs
+++ b/src/status_im/commands/handlers/loading.cljs
@@ -61,7 +61,7 @@
 (defn dispatch-loaded!
   [db [{{:keys [whisper-identity]} :contact
         :as                        params} file]]
-  (if (::valid-hash db)
+  (if (:command-hash-valid? db)
     (dispatch [::parse-commands! params file])
     (dispatch [::loading-failed! whisper-identity ::wrong-hash])))
 
@@ -97,7 +97,7 @@
         ;; todo check
         #_(= (get-hash-by-identity db identity)
              (get-hash-by-file file))]
-    (assoc db ::valid-hash valid?)))
+    (assoc db :command-hash-valid? valid?)))
 
 (defn each-merge [coll with]
   (->> coll
@@ -160,13 +160,13 @@
                                           :type :command))
 
             (= id bots-constants/mailman-bot)
-            (update db :contacts (fn [contacts]
-                                   (reduce (fn [contacts [k _]]
-                                             (update-in contacts [k :commands]
-                                                        (fn [c]
-                                                          (merge mailman-commands c))))
-                                           contacts
-                                           contacts))))))
+            (update :contacts (fn [contacts]
+                                (reduce (fn [contacts [k _]]
+                                          (update-in contacts [k :commands]
+                                                     (fn [c]
+                                                       (merge mailman-commands c))))
+                                        contacts
+                                        contacts))))))
 
 (defn save-commands-js!
   [_ [id file]]
@@ -229,16 +229,16 @@
 
 (reg-handler :add-commands-loading-callback
   (fn [db [chat-id callback]]
-    (update-in db [::commands-callbacks chat-id] conj callback)))
+    (update-in db [:commands-callbacks chat-id] conj callback)))
 
 (reg-handler :invoke-commands-loading-callbacks
   (u/side-effect!
     (fn [db [chat-id]]
-      (let [callbacks (get-in db [::commands-callbacks chat-id])]
+      (let [callbacks (get-in db [:commands-callbacks chat-id])]
         (doseq [callback callbacks]
           (callback))
         (dispatch [::clear-commands-callbacks chat-id])))))
 
 (reg-handler ::clear-commands-callbacks
   (fn [db [chat-id]]
-    (assoc-in db [::commands-callbacks chat-id] nil)))
+    (assoc-in db [:commands-callbacks chat-id] nil)))
diff --git a/src/status_im/contacts/handlers.cljs b/src/status_im/contacts/handlers.cljs
index c2c83db60a..6b2b9f83f7 100644
--- a/src/status_im/contacts/handlers.cljs
+++ b/src/status_im/contacts/handlers.cljs
@@ -401,8 +401,7 @@
   (after #(dispatch [:navigate-to :contact-toggle-list]))
   (fn [db [_ group-type]]
     (->
-      (assoc db :contact-group nil
-                :group-type group-type
+      (assoc db :group-type group-type
                 :selected-contacts #{}
                 :new-chat-name "")
       (assoc-in [:toolbar-search :show] nil)
diff --git a/src/status_im/contacts/specs.cljs b/src/status_im/contacts/specs.cljs
new file mode 100644
index 0000000000..413961279e
--- /dev/null
+++ b/src/status_im/contacts/specs.cljs
@@ -0,0 +1,15 @@
+(ns status-im.contacts.specs
+  (:require [cljs.spec.alpha :as s]))
+
+(s/def :contacts/contacts map?)                                     ;; {id (string) contact (map)}
+(s/def :contacts/new-contacts seq?)
+(s/def :contacts/new-contact-identity string?)                      ;;public key of new contact during adding this new contact
+(s/def :contacts/new-contact-public-key-error string?)
+(s/def :contacts/contact-identity string?)                          ;;on showing this contact profile
+(s/def :contacts/contacts-ui-props map?)
+(s/def :contacts/contact-list-ui-props map?)
+(s/def :contacts/contacts-click-handler (s/nilable fn?))            ;;used in modal list (for example for wallet)
+(s/def :contacts/contacts-click-action (s/nilable keyword?))        ;;used in modal list (for example for wallet)
+(s/def :contacts/contacts-click-params map?)                        ;;used in modal list (for example for wallet)
+
+
diff --git a/src/status_im/db.cljs b/src/status_im/db.cljs
index 3d8c53dd85..25c4b7b184 100644
--- a/src/status_im/db.cljs
+++ b/src/status_im/db.cljs
@@ -1,57 +1,28 @@
 (ns status-im.db
-  (:require [status-im.components.react :refer [animated]]
-            [status-im.components.animation :as anim]
-            [status-im.constants :refer [console-chat-id]]
+  (:require [status-im.constants :refer [console-chat-id]]
             [status-im.utils.platform :as p]))
 
 ;; initial state of app-db
-(def app-db {:identity-password          "replace-me-with-user-entered-password"
-             :identity                   "me"
-             :current-public-key         "me"
-
+(def app-db {:current-public-key         ""
+             :status-module-initialized? (or p/ios? js/goog.DEBUG)
+             :keyboard-height            0
              :accounts                   {}
-             :current-account-id         nil
-
+             :navigation-stack           '()
+             :contacts                   {}
+             :qr-codes                   {}
+             :contact-groups             {}
+             :selected-contacts          #{}
+             :chats                      {}
+             :current-chat-id            console-chat-id
+             :loading-allowed            true
+             :selected-participants      #{}
              :profile-edit               {:edit?      false
                                           :name       nil
                                           :email      nil
                                           :status     nil
                                           :photo-path nil}
-
-             :new-contact-identity       ""
-             :contacts                   {}
-             :contact-groups             {}
              :discoveries                {}
-             :discover-search-tags       []
-             :tags                       {}
-
-             :chats                      {}
-             :chat                       {:command      nil
-                                          :last-message nil}
-             :current-chat-id            console-chat-id
-
-             :contacts-ids               #{}
-             :selected-contacts          #{}
-             :chats-updated-signal       0
-             :selected-participants      #{}
-             :view-id                    nil
-             :navigation-stack           '()
-             :current-tag                nil
-             :qr-codes                   {}
-             :keyboard-height            0
-             :loading-allowed            true
-
+             :discover-search-tags       '()
+             :tags                       []
              :sync-state                 :done
-             :sync-listening-started     nil
-             :status-module-initialized? (or p/ios? js/goog.DEBUG)
-             :edit-mode                  {}
              :network                    :testnet})
-
-(defn chat-command-path [chat-id]
-  [:chats chat-id :command-input :command])
-(defn chat-command-to-message-id-path [chat-id]
-  [:chats chat-id :command-input :to-message-id])
-(defn chat-command-content-path [chat-id]
-  [:chats chat-id :command-input :content])
-(defn chat-command-request-path [chat-id message-id]
-  [:chats chat-id :command-requests message-id])
diff --git a/src/status_im/discover/specs.cljs b/src/status_im/discover/specs.cljs
new file mode 100644
index 0000000000..7c88f6adb3
--- /dev/null
+++ b/src/status_im/discover/specs.cljs
@@ -0,0 +1,8 @@
+(ns status-im.discover.specs
+  (:require [cljs.spec.alpha :as s]))
+
+(s/def :discoveries/discoveries map?)                                  ;; {id (string) descovery (map)}
+(s/def :discoveries/discover-search-tags seq?)
+(s/def :discoveries/tags vector?)
+(s/def :discoveries/current-tag map?)
+(s/def :discoveries/request-discoveries-timer int?)
\ No newline at end of file
diff --git a/src/status_im/discover/subs.cljs b/src/status_im/discover/subs.cljs
index 178d5b8fb0..b3ec9c0409 100644
--- a/src/status_im/discover/subs.cljs
+++ b/src/status_im/discover/subs.cljs
@@ -13,8 +13,8 @@
     (+ created-at                                           ;; message is newer => priority is higher
        (if (or me? contact) time/day 0)                     ;; user exists in contact list => increase priority
        (if (or me? chat) time/day 0)                        ;; chat with this user exists => increase priority
-       (if (or me? seen-online-recently?) time/hour 0)      ;; the user was online recently => increase priority
-       )))
+       (if (or me? seen-online-recently?) time/hour 0))))      ;; the user was online recently => increase priority
+
 
 (defn- get-discoveries-by-tags [discoveries current-tag tags]
   (let [tags' (or tags [current-tag])]
diff --git a/src/status_im/group_settings/handlers.cljs b/src/status_im/group_settings/handlers.cljs
index 58e8f68cdd..6762e68e9f 100644
--- a/src/status_im/group_settings/handlers.cljs
+++ b/src/status_im/group_settings/handlers.cljs
@@ -10,10 +10,6 @@
             [status-im.constants :refer [text-content-type]]
             [status-im.navigation.handlers :as nav]))
 
-(defmethod nav/preload-data! :group-settings
-  [db _]
-  (assoc db :selected-participants #{}))
-
 (defn save-property!
   [current-chat-id property-name value]
   (chats/save-property current-chat-id property-name value))
@@ -32,13 +28,11 @@
 
 (defn prepare-chat-settings
   [{:keys [current-chat-id] :as db}]
-  (let [{:keys [name color]} (-> db
-                                 (get-in [:chats current-chat-id])
-                                 (select-keys [:name :color]))]
+  (let [{:keys [name]} (-> db
+                           (get-in [:chats current-chat-id])
+                           (select-keys [:name :color]))]
     (assoc db :new-chat-name name
-              :new-chat-color color
-              :group-type :chat-group
-              :group-settings {})))
+              :group-type :chat-group)))
 
 (register-handler :show-group-settings
   (after (fn [_ _] (dispatch [:navigate-to :chat-group-settings])))
@@ -64,10 +58,6 @@
   (after delete-messages!)
   clear-messages)
 
-(register-handler :group-settings
-  (fn [db [_ k v]]
-    (assoc-in db [:group-settings k] v)))
-
 (defn remove-identities [collection identities]
   (remove #(identities (:identity %)) collection))
 
diff --git a/src/status_im/group_settings/subs.cljs b/src/status_im/group_settings/subs.cljs
index c1bb17da4d..1390a12255 100644
--- a/src/status_im/group_settings/subs.cljs
+++ b/src/status_im/group_settings/subs.cljs
@@ -9,10 +9,6 @@
       (let [identity (first (:selected-participants @db))]
         (get-in @db [:contacts identity])))))
 
-(register-sub :group-settings
-  (fn [db [_ k]]
-    (reaction (get-in @db [:group-settings k]))))
-
 (defn get-chat-name-validation-messages [chat-name]
   (filter some?
           (list (when (zero? (count chat-name))
diff --git a/src/status_im/handlers.cljs b/src/status_im/handlers.cljs
index 49b321a975..cb876833a6 100644
--- a/src/status_im/handlers.cljs
+++ b/src/status_im/handlers.cljs
@@ -60,8 +60,7 @@
   (fn [db _]
     (-> db
         (assoc :current-chat-id console-chat-id)
-        (dissoc :edit-mode
-                :transactions
+        (dissoc :transactions
                 :transactions-queue
                 :new-contact-identity))))
 
@@ -224,9 +223,3 @@
 (register-handler :update-geolocation
   (fn [db [_ geolocation]]
     (assoc db :geolocation geolocation)))
-
-;; -- User data --------------------------------------------------------------
-(register-handler :load-user-phone-number
-  (fn [db [_]]
-    ;; todo fetch phone number from db
-    (assoc db :user-phone-number "123")))
diff --git a/src/status_im/ios/core.cljs b/src/status_im/ios/core.cljs
index 75d1b09dbf..b9b4c1b6a3 100644
--- a/src/status_im/ios/core.cljs
+++ b/src/status_im/ios/core.cljs
@@ -3,6 +3,7 @@
             [re-frame.core :refer [subscribe dispatch dispatch-sync]]
             [status-im.handlers]
             [status-im.subs]
+            [status-im.specs]
             [status-im.components.react :refer [view
                                                 modal
                                                 app-registry
@@ -145,5 +146,4 @@
   (dispatch [:listen-to-network-status!])
   (dispatch [:initialize-crypt])
   (dispatch [:initialize-geth])
-  (dispatch [:load-user-phone-number])
   (.registerComponent app-registry "StatusIm" #(r/reactify-component app-root)))
diff --git a/src/status_im/navigation/handlers.cljs b/src/status_im/navigation/handlers.cljs
index d6867a8810..c85867d462 100644
--- a/src/status_im/navigation/handlers.cljs
+++ b/src/status_im/navigation/handlers.cljs
@@ -26,7 +26,7 @@
 
 (defn -preload-data! [{:keys [was-modal?] :as db} & args]
   (if was-modal?
-    (dissoc db :was-modal)
+    (dissoc db :was-modal?) ;;TODO check how it worked with this bug
     (apply preload-data! db args)))
 
 (register-handler :navigate-forget
diff --git a/src/status_im/navigation/specs.cljs b/src/status_im/navigation/specs.cljs
new file mode 100644
index 0000000000..9e15e28eeb
--- /dev/null
+++ b/src/status_im/navigation/specs.cljs
@@ -0,0 +1,8 @@
+(ns status-im.navigation.specs
+  (:require [cljs.spec.alpha :as s]))
+
+(s/def :navigation/view-id keyword?)                                  ;;current view
+(s/def :navigation/modal (s/nilable keyword?))                        ;;modal view id
+(s/def :navigation/navigation-stack seq?)                             ;;stack of view's ids (keywords)
+(s/def :navigation/prev-tab-view-id keyword?)
+(s/def :navigation/prev-view-id keyword?)
\ No newline at end of file
diff --git a/src/status_im/new_group/handlers.cljs b/src/status_im/new_group/handlers.cljs
index de0a57dce3..db64ee8a50 100644
--- a/src/status_im/new_group/handlers.cljs
+++ b/src/status_im/new_group/handlers.cljs
@@ -246,7 +246,7 @@
                            (into {}))]
     (-> db
         (update :contact-groups merge new-groups')
-        (assoc :new-groups (vals new-groups')))))
+        (assoc :new-groups (into [] (vals new-groups'))))))
 
 (register-handler :add-groups
   (after save-groups!)
@@ -263,7 +263,7 @@
 
 (defmethod nav/preload-data! :new-public-group
   [db]
-  (dissoc db :public-group/topic))
+  (dissoc db :public-group-topic))
 
 (defn move-item [v from to]
   (if (< from to)
diff --git a/src/status_im/new_group/screen_public.cljs b/src/status_im/new_group/screen_public.cljs
index e0433635ff..ce50cfaacc 100644
--- a/src/status_im/new_group/screen_public.cljs
+++ b/src/status_im/new_group/screen_public.cljs
@@ -21,7 +21,7 @@
             [cljs.spec.alpha :as s]))
 
 (defview new-group-toolbar []
-  [topic [:get :public-group/topic]]
+  [topic [:get :public-group-topic]]
   (let [create-btn-enabled? (s/valid? ::v/topic topic)]
     [view
      [status-bar]
@@ -33,7 +33,7 @@
                              #(dispatch [:create-new-public-group topic]))}]}]]))
 
 (defview group-name-input []
-  [topic [:get :public-group/topic]]
+  [topic [:get :public-group-topic]]
   [view
    [text-field
     {:error           (cond
@@ -48,7 +48,7 @@
      :label-hidden?   true
      :input-style     st/group-chat-topic-input
      :auto-focus      true
-     :on-change-text  #(dispatch [:set :public-group/topic %])
+     :on-change-text  #(dispatch [:set :public-group-topic %])
      :value           topic
      :validator       #(re-matches #"[a-z\-]*" %)
      :auto-capitalize :none}]
diff --git a/src/status_im/new_group/specs.cljs b/src/status_im/new_group/specs.cljs
new file mode 100644
index 0000000000..93dd7c8cb9
--- /dev/null
+++ b/src/status_im/new_group/specs.cljs
@@ -0,0 +1,11 @@
+(ns status-im.new-group.specs
+  (:require [cljs.spec.alpha :as s]))
+
+(s/def :group/contact-groups map?)                               ;; {id (string) group (map)}
+(s/def :group/contact-group-id string?)                          ;;used during editing contact group
+(s/def :group/group-type keyword?)                               ;;contact group or chat group
+(s/def :group/new-group map?)                                    ;;used during creating or edeting contact group
+(s/def :group/new-groups (s/nilable vector?))                    ;;used during creating or edeting contact groups
+(s/def :group/contacts-group (s/nilable map?))
+(s/def :group/selected-contacts set?)
+(s/def :group/groups-order seq?)                                 ;;list of group ids
\ No newline at end of file
diff --git a/src/status_im/profile/specs.cljs b/src/status_im/profile/specs.cljs
new file mode 100644
index 0000000000..22892d213b
--- /dev/null
+++ b/src/status_im/profile/specs.cljs
@@ -0,0 +1,5 @@
+(ns status-im.profile.specs
+  (:require [cljs.spec.alpha :as s]))
+
+;EDIT PROFILE
+(s/def :profile/profile-edit map?)
\ No newline at end of file
diff --git a/src/status_im/qr_scanner/specs.cljs b/src/status_im/qr_scanner/specs.cljs
new file mode 100644
index 0000000000..1b579cab7e
--- /dev/null
+++ b/src/status_im/qr_scanner/specs.cljs
@@ -0,0 +1,6 @@
+(ns status-im.qr-scanner.specs
+  (:require [cljs.spec.alpha :as s]))
+
+(s/def :qr/qr-codes map?)                                     ;;on scan qr
+(s/def :qr/qr-modal map?)                                     ;;used in qr modal screen
+(s/def :qr/current-qr-context map?)
\ No newline at end of file
diff --git a/src/status_im/specs.cljs b/src/status_im/specs.cljs
new file mode 100644
index 0000000000..7cb51c293b
--- /dev/null
+++ b/src/status_im/specs.cljs
@@ -0,0 +1,124 @@
+(ns status-im.specs
+  (:require-macros [status-im.utils.db :refer [allowed-keys]])
+  (:require [cljs.spec.alpha :as s]
+            [status-im.accounts.specs]
+            [status-im.navigation.specs]
+            [status-im.contacts.specs]
+            [status-im.qr-scanner.specs]
+            [status-im.new-group.specs]
+            [status-im.chat.specs]
+            [status-im.profile.specs]
+            [status-im.transactions.specs]
+            [status-im.discover.specs]))
+
+;GLOBAL
+(s/def ::current-public-key string?)                        ;;public key of current logged in account
+(s/def ::first-run boolean?)                                ;;true when application running at first time
+(s/def ::was-modal? boolean?)
+(s/def ::rpc-url string?)                                   ;;"http://localhost:8545"
+(s/def ::web3 any?)                                         ;;object? doesn't work
+(s/def ::webview-bridge any?)                               ;;object?
+(s/def ::status-module-initialized? boolean?)
+(s/def ::status-node-started? (s/nilable boolean?))
+(s/def ::toolbar-search map?)
+(s/def ::keyboard-height number?)                           ;;height of native keyboard if shown
+(s/def ::keyboard-max-height number?)
+(s/def ::orientation keyword?)                              ;;:unknown - not used
+(s/def ::network-status (s/nilable keyword?))               ;;:online - presence of internet connection in the phone
+;NODE
+(s/def ::sync-listening-started boolean?)
+(s/def ::sync-state keyword?)
+;NETWORK
+(s/def ::network keyword?)                                  ;;network name :testnet
+
+(s/def ::db (allowed-keys :opt-un
+                          [::current-public-key
+                           ::first-run
+                           ::modal
+                           ::was-modal?
+                           ::rpc-url
+                           ::web3
+                           ::webview-bridge
+                           ::status-module-initialized?
+                           ::status-node-started?
+                           ::toolbar-search
+                           ::keyboard-height
+                           ::keyboard-max-height
+                           ::orientation
+                           ::network-status
+                           ::sync-listening-started
+                           ::sync-state
+                           ::network
+                           :accounts/accounts
+                           :accounts/account-creation?
+                           :accounts/creating-account?
+                           :accounts/current-account-id
+                           :accounts/recover
+                           :accounts/login
+                           :navigation/view-id
+                           :navigation/navigation-stack
+                           :navigation/prev-tab-view-id
+                           :navigation/prev-view-id
+                           :contacts/contacts
+                           :contacts/new-contacts
+                           :contacts/new-contact-identity
+                           :contacts/new-contact-public-key-error
+                           :contacts/contact-identity
+                           :contacts/contacts-ui-props
+                           :contacts/contact-list-ui-props
+                           :contacts/contacts-click-handler
+                           :contacts/contacts-click-action
+                           :contacts/contacts-click-params
+                           :qr/qr-codes
+                           :qr/qr-modal
+                           :qr/current-qr-context
+                           :group/contact-groups
+                           :group/contact-group-id
+                           :group/group-type
+                           :group/new-group
+                           :group/new-groups
+                           :group/contacts-group
+                           :group/selected-contacts
+                           :group/groups-order
+                           :chats/chats
+                           :chats/current-chat-id
+                           :chats/chat-id
+                           :chats/new-chat
+                           :chats/new-chat-name
+                           :chats/chat-animations
+                           :chats/chat-ui-props
+                           :chats/chat-list-ui-props
+                           :chats/layout-height
+                           :chats/expandable-view-height-to-value
+                           :chats/global-commands
+                           :chats/loading-allowed
+                           :chats/message-data
+                           :chats/message-id->transaction-id
+                           :chats/message-status
+                           :chats/unviewed-messages
+                           :chats/selected-participants
+                           :chats/chat-loaded-callbacks
+                           :chats/commands-callbacks
+                           :chats/command-hash-valid?
+                           :chats/public-group-topic
+                           :chats/confirmation-code-sms-listener
+                           :chats/messages
+                           :chats/loaded-chats
+                           :chats/bot-subscriptions
+                           :chats/new-request
+                           :chats/raw-unviewed-messages
+                           :profile/profile-edit
+                           :transactions/transactions
+                           :transactions/transactions-queue
+                           :transactions/selected-transaction
+                           :transactions/confirm-transactions
+                           :transactions/confirmed-transactions-count
+                           :transactions/transactions-list-ui-props
+                           :transactions/transaction-details-ui-props
+                           :transactions/wrong-password-counter
+                           :transactions/wrong-password?
+                           :discoveries/discoveries
+                           :discoveries/discover-search-tags
+                           :discoveries/tags
+                           :discoveries/current-tag
+                           :discoveries/request-discoveries-timer]))
diff --git a/src/status_im/transactions/specs.cljs b/src/status_im/transactions/specs.cljs
new file mode 100644
index 0000000000..826744a7c6
--- /dev/null
+++ b/src/status_im/transactions/specs.cljs
@@ -0,0 +1,12 @@
+(ns status-im.transactions.specs
+  (:require [cljs.spec.alpha :as s]))
+
+(s/def :transactions/transactions map?)                                 ;; {id (string) transaction (map)}
+(s/def :transactions/transactions-queue map?)                           ;; {id (string) transaction (map)}
+(s/def :transactions/selected-transaction map?)
+(s/def :transactions/confirm-transactions map?)
+(s/def :transactions/confirmed-transactions-count int?)
+(s/def :transactions/transactions-list-ui-props map?)
+(s/def :transactions/transaction-details-ui-props map?)
+(s/def :transactions/wrong-password-counter int?)
+(s/def :transactions/wrong-password? boolean?)
\ No newline at end of file
diff --git a/src/status_im/utils/db.clj b/src/status_im/utils/db.clj
new file mode 100644
index 0000000000..7ef66ccb12
--- /dev/null
+++ b/src/status_im/utils/db.clj
@@ -0,0 +1,12 @@
+(ns status-im.utils.db
+  (:require [cljs.spec.alpha :as s]))
+
+(defmacro allowed-keys
+  [& {:keys [req req-un opt opt-un] :as args}]
+  `(s/merge (s/keys ~@(apply concat (vec args)))
+
+            (s/map-of ~(set (concat req
+                                    (map (comp keyword name) req-un)
+                                    opt
+                                    (map (comp keyword name) opt-un)))
+                      any?)))
\ No newline at end of file
diff --git a/src/status_im/utils/handlers.cljs b/src/status_im/utils/handlers.cljs
index e8297352c1..1cd9b95231 100644
--- a/src/status_im/utils/handlers.cljs
+++ b/src/status_im/utils/handlers.cljs
@@ -1,7 +1,8 @@
 (ns status-im.utils.handlers
   (:require [re-frame.core :refer [after dispatch debug] :as re-core]
             [clojure.string :as str]
-            [taoensso.timbre :as log]))
+            [taoensso.timbre :as log]
+            [cljs.spec.alpha :as s]))
 
 (defn side-effect!
   "Middleware for handlers that will not affect db."
@@ -21,10 +22,20 @@
     (let [new-db  (handler db v)]
       new-db)))
 
+(defn check-spec
+  "throw an exception if db doesn't match the spec"
+  [handler]
+  (fn check-handler
+    [db v]
+    (let [new-db  (handler db v)]
+      (when-not (s/valid? :status-im.specs/db new-db)
+        (throw (ex-info (str "spec check failed on: " (first v) "\n " (s/explain-str :status-im.specs/db new-db)) {})))
+      new-db)))
+
 (defn register-handler
   ([name handler] (register-handler name nil handler))
   ([name middleware handler]
-   (re-core/register-handler name [debug-handlers-names middleware] handler)))
+   (re-core/register-handler name [debug-handlers-names (when js/goog.DEBUG check-spec) middleware] handler)))
 
 (defn get-hashtags [status]
   (if status