diff --git a/simplex-chat.cabal b/simplex-chat.cabal
index 6b91a1e3b7..9af114a67d 100644
--- a/simplex-chat.cabal
+++ b/simplex-chat.cabal
@@ -201,6 +201,7 @@ test-suite simplex-chat-test
       MarkdownTests
       MobileTests
       ProtocolTests
+      SchemaDump
       Paths_simplex_chat
   hs-source-dirs:
       tests
diff --git a/src/Simplex/Chat/Migrations/chat_schema.sql b/src/Simplex/Chat/Migrations/chat_schema.sql
new file mode 100644
index 0000000000..afe9c16eaa
--- /dev/null
+++ b/src/Simplex/Chat/Migrations/chat_schema.sql
@@ -0,0 +1,283 @@
+CREATE TABLE migrations (
+        name TEXT NOT NULL,
+        ts TEXT NOT NULL,
+        PRIMARY KEY (name)
+      );
+CREATE TABLE contact_profiles ( -- remote user profile
+  contact_profile_id INTEGER PRIMARY KEY,
+  display_name TEXT NOT NULL, -- contact name set by remote user (not unique), this name must not contain spaces
+  full_name TEXT NOT NULL,
+  properties TEXT NOT NULL DEFAULT '{}' -- JSON with contact profile properties
+, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL), image TEXT);
+CREATE INDEX contact_profiles_index ON contact_profiles (display_name, full_name);
+CREATE TABLE users (
+  user_id INTEGER PRIMARY KEY,
+  contact_id INTEGER NOT NULL UNIQUE REFERENCES contacts ON DELETE CASCADE
+    DEFERRABLE INITIALLY DEFERRED,
+  local_display_name TEXT NOT NULL UNIQUE,
+  active_user INTEGER NOT NULL DEFAULT 0, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL), -- 1 for active user
+  FOREIGN KEY (user_id, local_display_name)
+    REFERENCES display_names (user_id, local_display_name)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE
+    DEFERRABLE INITIALLY DEFERRED
+);
+CREATE TABLE display_names (
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+  local_display_name TEXT NOT NULL,
+  ldn_base TEXT NOT NULL,
+  ldn_suffix INTEGER NOT NULL DEFAULT 0, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL),
+  PRIMARY KEY (user_id, local_display_name) ON CONFLICT FAIL,
+  UNIQUE (user_id, ldn_base, ldn_suffix) ON CONFLICT FAIL
+) WITHOUT ROWID;
+CREATE TABLE contacts (
+  contact_id INTEGER PRIMARY KEY,
+  contact_profile_id INTEGER REFERENCES contact_profiles ON DELETE SET NULL, -- NULL if it's an incognito profile
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+  local_display_name TEXT NOT NULL,
+  is_user INTEGER NOT NULL DEFAULT 0, -- 1 if this contact is a user
+  via_group INTEGER REFERENCES groups (group_id) ON DELETE SET NULL,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')), updated_at TEXT CHECK (updated_at NOT NULL), xcontact_id BLOB,
+  FOREIGN KEY (user_id, local_display_name)
+    REFERENCES display_names (user_id, local_display_name)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE,
+  UNIQUE (user_id, local_display_name),
+  UNIQUE (user_id, contact_profile_id)
+);
+CREATE TABLE sent_probes (
+  sent_probe_id INTEGER PRIMARY KEY,
+  contact_id INTEGER NOT NULL UNIQUE REFERENCES contacts ON DELETE CASCADE,
+  probe BLOB NOT NULL,
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL),
+  UNIQUE (user_id, probe)
+);
+CREATE TABLE sent_probe_hashes (
+  sent_probe_hash_id INTEGER PRIMARY KEY,
+  sent_probe_id INTEGER NOT NULL REFERENCES sent_probes ON DELETE CASCADE,
+  contact_id INTEGER NOT NULL REFERENCES contacts ON DELETE CASCADE,
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL),
+  UNIQUE (sent_probe_id, contact_id)
+);
+CREATE TABLE received_probes (
+  received_probe_id INTEGER PRIMARY KEY,
+  contact_id INTEGER NOT NULL REFERENCES contacts ON DELETE CASCADE,
+  probe BLOB,
+  probe_hash BLOB NOT NULL,
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE
+, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL));
+CREATE TABLE known_servers(
+  server_id INTEGER PRIMARY KEY,
+  host TEXT NOT NULL,
+  port TEXT NOT NULL,
+  key_hash BLOB,
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL),
+  UNIQUE (user_id, host, port)
+) WITHOUT ROWID;
+CREATE TABLE group_profiles ( -- shared group profiles
+  group_profile_id INTEGER PRIMARY KEY,
+  display_name TEXT NOT NULL, -- this name must not contain spaces
+  full_name TEXT NOT NULL,
+  properties TEXT NOT NULL DEFAULT '{}' -- JSON with user or contact profile
+, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL), image TEXT);
+CREATE TABLE groups (
+  group_id INTEGER PRIMARY KEY, -- local group ID
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+  local_display_name TEXT NOT NULL, -- local group name without spaces
+  group_profile_id INTEGER REFERENCES group_profiles ON DELETE SET NULL, -- shared group profile
+  inv_queue_info BLOB, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL), -- received
+  FOREIGN KEY (user_id, local_display_name)
+    REFERENCES display_names (user_id, local_display_name)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE,
+  UNIQUE (user_id, local_display_name),
+  UNIQUE (user_id, group_profile_id)
+);
+CREATE INDEX idx_groups_inv_queue_info ON groups (inv_queue_info);
+CREATE TABLE group_members ( -- group members, excluding the local user
+  group_member_id INTEGER PRIMARY KEY,
+  group_id INTEGER NOT NULL REFERENCES groups ON DELETE CASCADE,
+  member_id BLOB NOT NULL, -- shared member ID, unique per group
+  member_role TEXT NOT NULL, -- owner, admin, member
+  member_category TEXT NOT NULL, -- see GroupMemberCategory
+  member_status TEXT NOT NULL, -- see GroupMemberStatus
+  invited_by INTEGER REFERENCES contacts (contact_id) ON DELETE SET NULL, -- NULL for the members who joined before the current user and for the group creator
+  sent_inv_queue_info BLOB, -- sent
+  group_queue_info BLOB, -- received
+  direct_queue_info BLOB, -- received
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+  local_display_name TEXT NOT NULL, -- should be the same as contact
+  contact_profile_id INTEGER NOT NULL REFERENCES contact_profiles ON DELETE CASCADE,
+  contact_id INTEGER REFERENCES contacts ON DELETE CASCADE, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL),
+  FOREIGN KEY (user_id, local_display_name)
+    REFERENCES display_names (user_id, local_display_name)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE,
+  UNIQUE (group_id, member_id)
+);
+CREATE TABLE group_member_intros (
+  group_member_intro_id INTEGER PRIMARY KEY,
+  re_group_member_id INTEGER NOT NULL REFERENCES group_members (group_member_id) ON DELETE CASCADE,
+  to_group_member_id INTEGER NOT NULL REFERENCES group_members (group_member_id) ON DELETE CASCADE,
+  group_queue_info BLOB,
+  direct_queue_info BLOB,
+  intro_status TEXT NOT NULL, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL), -- see GroupMemberIntroStatus
+  UNIQUE (re_group_member_id, to_group_member_id)
+);
+CREATE TABLE files (
+  file_id INTEGER PRIMARY KEY,
+  contact_id INTEGER REFERENCES contacts ON DELETE CASCADE,
+  group_id INTEGER REFERENCES groups ON DELETE CASCADE,
+  file_name TEXT NOT NULL,
+  file_path TEXT,
+  file_size INTEGER NOT NULL,
+  chunk_size INTEGER NOT NULL,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE
+, chat_item_id INTEGER DEFAULT NULL REFERENCES chat_items ON DELETE CASCADE, updated_at TEXT CHECK (updated_at NOT NULL), cancelled INTEGER);
+CREATE TABLE snd_files (
+  file_id INTEGER NOT NULL REFERENCES files ON DELETE CASCADE,
+  connection_id INTEGER NOT NULL REFERENCES connections ON DELETE CASCADE,
+  file_status TEXT NOT NULL, -- new, accepted, connected, completed
+  group_member_id INTEGER REFERENCES group_members ON DELETE CASCADE, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL),
+  PRIMARY KEY (file_id, connection_id)
+) WITHOUT ROWID;
+CREATE TABLE rcv_files (
+  file_id INTEGER PRIMARY KEY REFERENCES files ON DELETE CASCADE,
+  file_status TEXT NOT NULL, -- new, accepted, connected, completed
+  group_member_id INTEGER REFERENCES group_members ON DELETE CASCADE,
+  file_queue_info BLOB
+, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL));
+CREATE TABLE snd_file_chunks (
+  file_id INTEGER NOT NULL,
+  connection_id INTEGER NOT NULL,
+  chunk_number INTEGER NOT NULL,
+  chunk_agent_msg_id INTEGER,
+  chunk_sent INTEGER NOT NULL DEFAULT 0, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL), -- 0 (sent to agent), 1 (sent to server)
+  FOREIGN KEY (file_id, connection_id) REFERENCES snd_files ON DELETE CASCADE,
+  PRIMARY KEY (file_id, connection_id, chunk_number)
+) WITHOUT ROWID;
+CREATE TABLE rcv_file_chunks (
+  file_id INTEGER NOT NULL REFERENCES rcv_files ON DELETE CASCADE,
+  chunk_number INTEGER NOT NULL,
+  chunk_agent_msg_id INTEGER NOT NULL,
+  chunk_stored INTEGER NOT NULL DEFAULT 0, created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL), -- 0 (received), 1 (appended to file)
+  PRIMARY KEY (file_id, chunk_number)
+) WITHOUT ROWID;
+CREATE TABLE connections ( -- all SMP agent connections
+  connection_id INTEGER PRIMARY KEY,
+  agent_conn_id BLOB NOT NULL UNIQUE,
+  conn_level INTEGER NOT NULL DEFAULT 0,
+  via_contact INTEGER REFERENCES contacts (contact_id) ON DELETE SET NULL,
+  conn_status TEXT NOT NULL,
+  conn_type TEXT NOT NULL, -- contact, member, rcv_file, snd_file
+  user_contact_link_id INTEGER REFERENCES user_contact_links ON DELETE CASCADE,
+  contact_id INTEGER REFERENCES contacts ON DELETE CASCADE,
+  group_member_id INTEGER REFERENCES group_members ON DELETE CASCADE,
+  snd_file_id INTEGER,
+  rcv_file_id INTEGER REFERENCES rcv_files (file_id) ON DELETE CASCADE,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE, updated_at TEXT CHECK (updated_at NOT NULL), via_contact_uri_hash BLOB, xcontact_id BLOB,
+  FOREIGN KEY (snd_file_id, connection_id)
+    REFERENCES snd_files (file_id, connection_id)
+    ON DELETE CASCADE
+    DEFERRABLE INITIALLY DEFERRED
+);
+CREATE TABLE user_contact_links (
+  user_contact_link_id INTEGER PRIMARY KEY,
+  conn_req_contact BLOB NOT NULL,
+  local_display_name TEXT NOT NULL DEFAULT '',
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE, updated_at TEXT CHECK (updated_at NOT NULL), auto_accept INTEGER DEFAULT 0,
+  UNIQUE (user_id, local_display_name)
+);
+CREATE TABLE contact_requests (
+  contact_request_id INTEGER PRIMARY KEY,
+  user_contact_link_id INTEGER NOT NULL REFERENCES user_contact_links
+    ON UPDATE CASCADE ON DELETE CASCADE,
+  agent_invitation_id  BLOB NOT NULL,
+  contact_profile_id INTEGER REFERENCES contact_profiles
+    ON DELETE SET NULL -- NULL if it's an incognito profile
+    DEFERRABLE INITIALLY DEFERRED,
+  local_display_name TEXT NOT NULL,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE, updated_at TEXT CHECK (updated_at NOT NULL), xcontact_id BLOB,
+  FOREIGN KEY (user_id, local_display_name)
+    REFERENCES display_names (user_id, local_display_name)
+    ON UPDATE CASCADE
+    ON DELETE CASCADE
+    DEFERRABLE INITIALLY DEFERRED,
+  UNIQUE (user_id, local_display_name),
+  UNIQUE (user_id, contact_profile_id)
+);
+CREATE TABLE messages (
+  message_id INTEGER PRIMARY KEY,
+  msg_sent INTEGER NOT NULL, -- 0 for received, 1 for sent
+  chat_msg_event TEXT NOT NULL, -- message event tag (the constructor of CMEventTag)
+  msg_body BLOB, -- agent message body as received or sent
+  created_at TEXT NOT NULL DEFAULT (datetime('now'))
+, updated_at TEXT CHECK (updated_at NOT NULL), connection_id INTEGER DEFAULT NULL REFERENCES connections ON DELETE CASCADE, group_id INTEGER DEFAULT NULL REFERENCES groups ON DELETE CASCADE, shared_msg_id BLOB, shared_msg_id_user INTEGER);
+CREATE TABLE msg_deliveries (
+  msg_delivery_id INTEGER PRIMARY KEY,
+  message_id INTEGER NOT NULL REFERENCES messages ON DELETE CASCADE, -- non UNIQUE for group messages
+  connection_id INTEGER NOT NULL REFERENCES connections ON DELETE CASCADE,
+  agent_msg_id INTEGER, -- internal agent message ID (NULL while pending)
+  agent_msg_meta TEXT, -- JSON with timestamps etc. sent in MSG, NULL for sent
+  chat_ts TEXT NOT NULL DEFAULT (datetime('now')), created_at TEXT CHECK (created_at NOT NULL), updated_at TEXT CHECK (updated_at NOT NULL), -- broker_ts for received, created_at for sent
+  UNIQUE (connection_id, agent_msg_id)
+);
+CREATE TABLE msg_delivery_events (
+  msg_delivery_event_id INTEGER PRIMARY KEY,
+  msg_delivery_id INTEGER NOT NULL REFERENCES msg_deliveries ON DELETE CASCADE, -- non UNIQUE for multiple events per msg delivery
+  delivery_status TEXT NOT NULL, -- see MsgDeliveryStatus for allowed values
+  created_at TEXT NOT NULL DEFAULT (datetime('now')), updated_at TEXT CHECK (updated_at NOT NULL),
+  UNIQUE (msg_delivery_id, delivery_status)
+);
+CREATE TABLE pending_group_messages (
+  pending_group_message_id INTEGER PRIMARY KEY,
+  group_member_id INTEGER NOT NULL REFERENCES group_members ON DELETE CASCADE,
+  message_id INTEGER NOT NULL REFERENCES messages ON DELETE CASCADE,
+  group_member_intro_id INTEGER REFERENCES group_member_intros ON DELETE CASCADE,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+CREATE TABLE chat_items (
+  chat_item_id INTEGER PRIMARY KEY,
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+  contact_id INTEGER REFERENCES contacts ON DELETE CASCADE,
+  group_id INTEGER REFERENCES groups ON DELETE CASCADE,
+  group_member_id INTEGER REFERENCES group_members ON DELETE SET NULL, -- NULL for sent even if group_id is not
+  chat_msg_id INTEGER, -- sent as part of the message that created the item
+  created_by_msg_id INTEGER UNIQUE REFERENCES messages (message_id) ON DELETE SET NULL,
+  item_sent INTEGER NOT NULL, -- 0 for received, 1 for sent
+  item_ts TEXT NOT NULL, -- broker_ts of creating message for received, created_at for sent
+  item_deleted INTEGER NOT NULL DEFAULT 0, -- 1 for deleted,
+  item_content TEXT NOT NULL, -- JSON
+  item_text TEXT NOT NULL, -- textual representation
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+, item_status TEXT CHECK (item_status NOT NULL), shared_msg_id BLOB, quoted_shared_msg_id BLOB, quoted_sent_at TEXT, quoted_content TEXT, quoted_sent INTEGER, quoted_member_id BLOB, item_edited INTEGER);
+CREATE TABLE chat_item_messages (
+  chat_item_id INTEGER NOT NULL REFERENCES chat_items ON DELETE CASCADE,
+  message_id INTEGER NOT NULL UNIQUE REFERENCES messages ON DELETE CASCADE,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now')),
+  UNIQUE (chat_item_id, message_id)
+);
+CREATE INDEX idx_connections_via_contact_uri_hash ON connections (via_contact_uri_hash);
+CREATE INDEX idx_contact_requests_xcontact_id ON contact_requests (xcontact_id);
+CREATE INDEX idx_contacts_xcontact_id ON contacts (xcontact_id);
+CREATE TABLE smp_servers (
+  smp_server_id INTEGER PRIMARY KEY,
+  host TEXT NOT NULL,
+  port TEXT NOT NULL,
+  key_hash BLOB NOT NULL,
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now')),
+  UNIQUE (host, port)
+);
+CREATE INDEX idx_messages_shared_msg_id ON messages (shared_msg_id);
+CREATE UNIQUE INDEX idx_messages_direct_shared_msg_id ON messages (connection_id, shared_msg_id_user, shared_msg_id);
+CREATE UNIQUE INDEX idx_messages_group_shared_msg_id ON messages (group_id, shared_msg_id_user, shared_msg_id);
+CREATE INDEX idx_chat_items_shared_msg_id ON chat_items (shared_msg_id);
diff --git a/tests/SchemaDump.hs b/tests/SchemaDump.hs
new file mode 100644
index 0000000000..03ef2a47d9
--- /dev/null
+++ b/tests/SchemaDump.hs
@@ -0,0 +1,30 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module SchemaDump where
+
+import ChatClient (withTmpFiles)
+import Control.Monad (void)
+import Simplex.Chat.Store (createStore)
+import System.Process (readCreateProcess, shell)
+import Test.Hspec
+
+testDB :: FilePath
+testDB = "tests/tmp/test_chat.db"
+
+schema :: FilePath
+schema = "src/Simplex/Chat/Migrations/chat_schema.sql"
+
+schemaDumpTest :: Spec
+schemaDumpTest =
+  it "verify and overwrite schema dump" testVerifySchemaDump
+
+testVerifySchemaDump :: IO ()
+testVerifySchemaDump =
+  withTmpFiles $ do
+    void $ createStore testDB 1 False
+    void $ readCreateProcess (shell $ "touch " <> schema) ""
+    savedSchema <- readFile schema
+    savedSchema `seq` pure ()
+    void $ readCreateProcess (shell $ "sqlite3 " <> testDB <> " .schema > " <> schema) ""
+    currentSchema <- readFile schema
+    savedSchema `shouldBe` currentSchema
diff --git a/tests/Test.hs b/tests/Test.hs
index 8ed0ac0dcb..3df06d6c60 100644
--- a/tests/Test.hs
+++ b/tests/Test.hs
@@ -3,6 +3,7 @@ import ChatTests
 import MarkdownTests
 import MobileTests
 import ProtocolTests
+import SchemaDump
 import Test.Hspec
 
 main :: IO ()
@@ -11,3 +12,4 @@ main = withSmpServer . hspec $ do
   describe "SimpleX chat protocol" protocolTests
   describe "Mobile API Tests" mobileTests
   describe "SimpleX chat client" chatTests
+  describe "Schema dump" schemaDumpTest