diff --git a/CLI/FetchToncoinTransactions.php b/CLI/FetchToncoinTransactions.php
index 76af7a08..171ea091 100755
--- a/CLI/FetchToncoinTransactions.php
+++ b/CLI/FetchToncoinTransactions.php
@@ -24,8 +24,9 @@ class FetchToncoinTransactions extends Command
     public function __construct()
     {
         $ctx = DatabaseConnection::i()->getContext();
-        if (in_array("cryptotransactions", $ctx->getStructure()->getTables()))
+        if (in_array("cryptotransactions", $ctx->getStructure()->getTables())) {
             $this->transactions = $ctx->table("cryptotransactions");
+        }
 
         parent::__construct();
     }
diff --git a/CLI/RebuildImagesCommand.php b/CLI/RebuildImagesCommand.php
index a75931dd..6340743c 100644
--- a/CLI/RebuildImagesCommand.php
+++ b/CLI/RebuildImagesCommand.php
@@ -21,8 +21,9 @@ class RebuildImagesCommand extends Command
     public function __construct()
     {
         $ctx = DatabaseConnection::i()->getContext();
-        if (in_array("photos", $ctx->getStructure()->getTables()))
+        if (in_array("photos", $ctx->getStructure()->getTables())) {
             $this->images = $ctx->table("photos");
+        }
 
         parent::__construct();
     }
diff --git a/CLI/UpgradeCommand.php b/CLI/UpgradeCommand.php
index afe861ad..92abf161 100644
--- a/CLI/UpgradeCommand.php
+++ b/CLI/UpgradeCommand.php
@@ -14,11 +14,13 @@ use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Style\SymfonyStyle;
 
-class UpgradeCommand extends Command {
+class UpgradeCommand extends Command
+{
     protected static $defaultName = "upgrade";
-    
+
     private Connection $db;
-    
+    private Connection $eventDb;
+
     private array $chandlerTables = [
         "CHANDLERACLPERMISSIONALIASES",
         "CHANDLERACLGROUPSPERMISSIONS",
@@ -26,246 +28,337 @@ class UpgradeCommand extends Command {
         "CHANDLERACLRELATIONS",
         "CHANDLERGROUPS",
         "CHANDLERTOKENS",
-        "CHANDLERUSERS"
+        "CHANDLERUSERS",
     ];
-    
+
     public function __construct()
     {
         $this->db = DatabaseConnection::i()->getConnection();
-        
+        $this->eventDb = eventdb()->getConnection();
+
         parent::__construct();
     }
-    
+
     protected function configure(): void
     {
         $this->setDescription("Upgrade OpenVK installation")
             ->setHelp("This command upgrades database schema after OpenVK was updated")
-            ->addOption("quick", "Q", InputOption::VALUE_NEGATABLE,
-                "Don't display warning before migrating database", false)
-            ->addOption("repair", "R", InputOption::VALUE_NEGATABLE,
-                "Attempt to repair database schema if tables are missing", false)
-            ->addOption("oneshot", "O", InputOption::VALUE_NONE,
-                "Only execute one operation")
-            ->addArgument("chandler", InputArgument::OPTIONAL,
-                "Location of Chandler installation");
+            ->addOption(
+                "quick",
+                "Q",
+                InputOption::VALUE_NEGATABLE,
+                "Don't display warning before migrating database",
+                false
+            )
+            ->addOption(
+                "repair",
+                "R",
+                InputOption::VALUE_NEGATABLE,
+                "Attempt to repair database schema if tables are missing",
+                false
+            )
+            ->addOption(
+                "oneshot",
+                "O",
+                InputOption::VALUE_NONE,
+                "Only execute one operation"
+            )
+            ->addArgument(
+                "chandler",
+                InputArgument::OPTIONAL,
+                "Location of Chandler installation"
+            );
     }
-    
-    protected function checkDatabaseReadiness(bool &$chandlerOk, bool &$ovkOk, bool &$migrationsOk): void
+
+    protected function checkDatabaseReadiness(bool &$chandlerOk, bool &$ovkOk, bool &$eventOk, bool &$migrationsOk): void
     {
         $tables = $this->db->query("SHOW TABLES")->fetchAll();
-        $tables = array_map(fn ($x) => strtoupper($x->offsetGet(0)), $tables);
-        
+        $tables = array_map(fn($x) => strtoupper($x->offsetGet(0)), $tables);
+
         $missingTables = array_diff($this->chandlerTables, $tables);
-        if (sizeof($missingTables) == 0)
+        if (sizeof($missingTables) == 0) {
             $chandlerOk = true;
-        else if (sizeof($missingTables) == sizeof($this->chandlerTables))
+        } elseif (sizeof($missingTables) == sizeof($this->chandlerTables)) {
             $chandlerOk = null;
-        else
+        } else {
             $chandlerOk = false;
-        
+        }
+
+        if (is_null($this->eventDb)) {
+            $eventOk = false;
+        } elseif (is_null($this->eventDb->query("SHOW TABLES LIKE \"notifications\"")->fetch())) {
+            $eventOk = null;
+        } else {
+            $eventOk = true;
+        }
+
         $ovkOk = in_array("PROFILES", $tables);
         $migrationsOk = in_array("OVK_UPGRADE_HISTORY", $tables);
     }
-    
-    protected function executeSqlScript(int $errCode, string $script, SymfonyStyle $io, bool $transaction = false): int
-    {
-        $pdo = $this->db->getPdo();
-        
+
+    protected function executeSqlScript(
+        int $errCode,
+        string $script,
+        SymfonyStyle $io,
+        bool $transaction = false,
+        bool $eventDb = false
+    ): int {
+        $pdo = ($eventDb ? $this->eventDb : $this->db)->getPdo();
+
         $res = false;
         try {
-            if ($transaction)
+            if ($transaction) {
                 $res = $pdo->beginTransaction();
-            
+            }
+
             $res = $pdo->exec($script);
-            
-            if ($transaction)
+
+            if ($transaction) {
                 $res = $pdo->commit();
-        } catch (\PDOException $e) {}
-        
-        if ($res === false)
+            }
+        } catch (\PDOException $e) {
+        }
+
+        if ($res === false) {
             goto error;
-        
+        }
+
         return 0;
-        
+
         error:
         $io->getErrorStyle()->error([
             "Failed to execute SQL statement:",
-            implode("\t", $pdo->errorInfo())
+            implode("\t", $pdo->errorInfo()),
         ]);
-        
+
         return $errCode;
     }
-    
-    protected function getNextLevel(): int
+
+    protected function getNextLevel(bool $eventDb = false): int
     {
-        $record = $this->db->query("SELECT level FROM ovk_upgrade_history ORDER BY level DESC LIMIT 1");
-        if (!$record->getRowCount())
+        $db = $eventDb ? $this->eventDb : $this->db;
+        $tbl = $eventDb ? "ovk_events_upgrade_history" : "ovk_upgrade_history";
+        $record = $db->query("SELECT level FROM $tbl ORDER BY level DESC LIMIT 1");
+        if (!$record->getRowCount()) {
             return 0;
-        
+        }
+
         return $record->fetchField() + 1;
     }
-    
-    protected function getMigrationFiles(): array
+
+    protected function getMigrationFiles(bool $eventDb = false): array
     {
         $files = [];
         $root = dirname(__DIR__ . "/../install/init-static-db.sql");
-        
-        foreach (glob("$root/sqls/*.sql") as $file)
+        $dir = $eventDb ? "sqls/eventdb" : "sqls";
+
+        foreach (glob("$root/$dir/*.sql") as $file) {
             $files[(int) basename($file)] = basename($file);
-        
+        }
+
         ksort($files);
-        
+
         return $files;
     }
-    
+
     protected function installChandler(InputInterface $input, SymfonyStyle $io, bool $drop = false): int
     {
         $chandlerLocation = $input->getArgument("chandler") ?? (__DIR__ . "/../../../../");
         $chandlerConfigLocation = "$chandlerLocation/chandler.yml";
-        
+
         if (!file_exists($chandlerConfigLocation)) {
             $err = ["Could not find chandler location. Perhaps your config is too unique?"];
-            if (!$input->getOption("chandler"))
+            if (!$input->getOption("chandler")) {
                 $err[] = "Specify absolute path to your chandler installation using the --chandler option.";
-            
+            }
+
             $io->getErrorStyle()->error($err);
-            
+
             return 21;
         }
-        
+
         if ($drop) {
             $bar = new ProgressBar($io, sizeof($this->chandlerTables));
             $io->writeln("Dropping chandler tables...");
-            
-            foreach ($bar->iterate($this->chandlerTables) as $table)
+
+            foreach ($bar->iterate($this->chandlerTables) as $table) {
                 $this->db->query("DROP TABLE IF EXISTS $table;");
-            
+            }
+
             $io->newLine();
         }
-        
+
         $installFile = file_get_contents("$chandlerLocation/install/init-db.sql");
-        
+
         return $this->executeSqlScript(22, $installFile, $io);
     }
-    
+
     protected function initSchema(SymfonyStyle $io): int
     {
         $installFile = file_get_contents(__DIR__ . "/../install/init-static-db.sql");
-        
+
         return $this->executeSqlScript(31, $installFile, $io);
     }
-    
+
+    protected function initEventSchema(SymfonyStyle $io): int
+    {
+        $installFile = file_get_contents(__DIR__ . "/../install/init-event-db.sql");
+
+        return $this->executeSqlScript(31, $installFile, $io, true, true);
+    }
+
     protected function initUpgradeLog(SymfonyStyle $io): int
     {
         $installFile = file_get_contents(__DIR__ . "/../install/init-migration-table.sql");
-        
-        return $this->executeSqlScript(31, $installFile, $io);
+        $rc = $this->executeSqlScript(31, $installFile, $io);
+        if ($rc) {
+            var_dump($rc);
+            return $rc;
+        }
+
+        $installFile = file_get_contents(__DIR__ . "/../install/init-migration-table-event.sql");
+
+        return $this->executeSqlScript(32, $installFile, $io, false, true);
     }
-    
-    protected function runMigrations(SymfonyStyle $io, bool $oneshot): int
+
+    protected function runMigrations(SymfonyStyle $io, bool $eventDb, bool $oneshot): int
     {
-        $nextLevel = $this->getNextLevel();
-        $migrations = array_filter($this->getMigrationFiles(), fn ($id) => $id >= $nextLevel, ARRAY_FILTER_USE_KEY);
-        
+        $dir = $eventDb ? "sqls/eventdb" : "sqls";
+        $tbl = $eventDb ? "ovk_events_upgrade_history" : "ovk_upgrade_history";
+        $db = $eventDb ? $this->eventDb : $this->db;
+        $nextLevel = $this->getNextLevel($eventDb);
+        $migrations = array_filter(
+            $this->getMigrationFiles($eventDb),
+            fn($id) => $id >= $nextLevel,
+            ARRAY_FILTER_USE_KEY
+        );
+
         if (!sizeof($migrations)) {
-            $io->writeln("Database up to date. Nothing left to do.");
-            
             return 24;
         }
-        
+
         $uname = addslashes(`whoami`);
         $bar = new ProgressBar($io, sizeof($migrations));
         $bar->setFormat("very_verbose");
-        
+
         foreach ($bar->iterate($migrations) as $num => $migration) {
-            $script = file_get_contents(__DIR__ . "/../install/sqls/$migration");
-            $res = $this->executeSqlScript(100 + $num, $script, $io, true);
+            $script = file_get_contents(__DIR__ . "/../install/$dir/$migration");
+            $res = $this->executeSqlScript(100 + $num, $script, $io, true, $eventDb);
             if ($res != 0) {
                 $io->getErrorStyle()->error("Error while executing migration №$num");
-                
+
                 return $res;
             }
-            
+
             $t = time();
-            $this->db->query("INSERT INTO ovk_upgrade_history VALUES ($num, $t, \"$uname\");");
-            
-            if ($oneshot)
+            $db->query("INSERT INTO $tbl VALUES ($num, $t, \"$uname\");");
+
+            if ($oneshot) {
                 return 5;
+            }
         }
-        
+
+        $io->newLine();
+
         return 0;
     }
-    
+
     protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $oneShotMode = $input->getOption("oneshot");
         $io = new SymfonyStyle($input, $output);
-        
+
         if (!$input->getOption("quick")) {
             $io->writeln("Do full backup of the database before executing this command!");
             $io->writeln("Command will resume execution after 5 seconds.");
             $io->writeln("You can skip this warning with --quick option.");
             sleep(5);
         }
-        
+
         $migrationsOk = false;
         $chandlerOk = false;
+        $eventOk = false;
         $ovkOk = false;
-        
-        $this->checkDatabaseReadiness($chandlerOk, $ovkOk, $migrationsOk);
-        
+
+        $this->checkDatabaseReadiness($chandlerOk, $ovkOk, $eventOk, $migrationsOk);
+
         $res = -1;
         if ($chandlerOk === null) {
             $io->writeln("Chandler schema not detected, attempting to install...");
-            
+
             $res = $this->installChandler($input, $io);
-        } else if ($chandlerOk === false) {
+        } elseif ($chandlerOk === false) {
             if ($input->getOption("repair")) {
                 $io->warning("Chandler schema detected but is broken, attempting to repair...");
-                
+
                 $res = $this->installChandler($input, $io, true);
             } else {
                 $io->writeln("Chandler schema detected but is broken");
                 $io->writeln("Run command with --repair to repair (PERMISSIONS WILL BE LOST)");
-                
+
                 return 1;
             }
         }
-        
-        if ($res > 0)
+
+        if ($res > 0) {
             return $res;
-        else if ($res == 0 && $oneShotMode)
+        } elseif ($res == 0 && $oneShotMode) {
             return 5;
-        
+        }
+
         if (!$ovkOk) {
             $io->writeln("Initializing OpenVK schema...");
             $res = $this->initSchema($io);
-            if ($res > 0)
+            if ($res > 0) {
                 return $res;
-            else if ($oneShotMode)
+            } elseif ($oneShotMode) {
                 return 5;
+            }
         }
-        
+
         if (!$migrationsOk) {
             $io->writeln("Initializing upgrade log...");
             $res = $this->initUpgradeLog($io);
-            if ($res > 0)
+            if ($res > 0) {
                 return $res;
-            else if ($oneShotMode)
+            } elseif ($oneShotMode) {
                 return 5;
+            }
         }
-        
+
+        if ($eventOk !== false) {
+            if ($eventOk === null) {
+                $io->writeln("Initializing event database...");
+                $res = $this->initEventSchema($io);
+                if ($res > 0) {
+                    return $res;
+                } elseif ($oneShotMode) {
+                    return 5;
+                }
+            }
+
+            $io->writeln("Upgrading event database...");
+            $res = $this->runMigrations($io, true, $oneShotMode);
+            if ($res == 24) {
+                $output->writeln("Event database already up to date.");
+            } elseif ($res > 0) {
+                return $res;
+            }
+        }
+
         $io->writeln("Upgrading database...");
-        $res = $this->runMigrations($io, $oneShotMode);
-        
+        $res = $this->runMigrations($io, false, $oneShotMode);
+
         if (!$res) {
             $io->success("Database has been upgraded!");
-            
+
             return 0;
-        } else if ($res != 24) {
+        } elseif ($res != 24) {
             return $res;
         }
-        
+
+        $io->writeln("Database up to date. Nothing left to do.");
+
         return 0;
     }
-}
\ No newline at end of file
+}
diff --git a/bootstrap.php b/bootstrap.php
index 9100d3f2..21fdc65b 100644
--- a/bootstrap.php
+++ b/bootstrap.php
@@ -443,9 +443,10 @@ function downloadable_name(string $text): string
 }
 
 return (function () {
-    if (php_sapi_name() != "cli")
+    if (php_sapi_name() != "cli") {
         _ovk_check_environment();
-    
+    }
+
     require __DIR__ . "/vendor/autoload.php";
 
     setlocale(LC_TIME, "POSIX");
diff --git a/install/init-migration-table-event.sql b/install/init-migration-table-event.sql
new file mode 100644
index 00000000..ca59eb45
--- /dev/null
+++ b/install/init-migration-table-event.sql
@@ -0,0 +1,5 @@
+CREATE TABLE `ovk_events_upgrade_history` (
+    `level` smallint UNSIGNED NOT NULL,
+    `timestamp` bigint(20) UNSIGNED NOT NULL,
+    `operator` varchar(256) COLLATE utf8mb4_unicode_520_ci NOT NULL DEFAULT "Maintenance Script"
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_520_ci;
\ No newline at end of file
diff --git a/install/init-migration-table.sql b/install/init-migration-table.sql
index 53edb638..147fe5f4 100644
--- a/install/init-migration-table.sql
+++ b/install/init-migration-table.sql
@@ -1,9 +1,5 @@
-START TRANSACTION;
-
 CREATE TABLE `ovk_upgrade_history` (
     `level` smallint UNSIGNED NOT NULL,
     `timestamp` bigint(20) UNSIGNED NOT NULL,
     `operator` varchar(256) COLLATE utf8mb4_unicode_520_ci NOT NULL DEFAULT "Maintenance Script"
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_520_ci;
-
-COMMIT;
\ No newline at end of file
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_520_ci;
\ No newline at end of file