diff --git a/functions.php b/functions.php
index c5eba8c..e47662c 100644
--- a/functions.php
+++ b/functions.php
@@ -52,102 +52,57 @@ function getDatabaseConnection() {
 }
 
 /**
- * Pulls and stores all vault transaction logs for a user from the Torn API.
+ * Pulls and stores the full vault transaction log history for a user.
  *
- * This function retrieves all transaction logs related to vault deposits and
- * withdrawals for a specified user. It continues fetching logs until no more
- * entries are available, and stores each entry in the database. Each log entry
- * is uniquely identified by its ID and includes details such as timestamp,
- * description, and amount. The function requires the user's API key to
- * authenticate requests to the Torn API.
+ * Pages through the v2 Torn API using `_metadata.links.next` until the
+ * API reports no further pages. Intended for first-run use when the
+ * local database is empty. Idempotent: re-running on a partially
+ * populated database inserts only new entries (ON CONFLICT DO NOTHING).
  *
- * @param string $user The user whose transaction logs are to be retrieved and stored.
- *
- * @throws ApiKeyMissingException If the user does not have an API key configured.
- * @throws CurlErrorException If there is an error during the API call.
- * @throws Exception If there is an error decoding the JSON response or if the response is invalid.
+ * @param string $user The user whose logs should be fetched.
  *
  * @return void
  */
-function firstRun($user) {
-    $apiKey = USER_KEYS[$user];
-    $pdo    = getDatabaseConnection();
-    $to     = time();
+function backfillUserLogs($user) {
+    $url  = 'https://api.torn.com/v2/user?selections=log&log=5850,5851';
+    $pdo  = getDatabaseConnection();
 
     do {
-        $url = "https://api.torn.com/v2/user?selections=log&log=5850,5851&to=$to";
-        $ch  = curl_init($url);
-
-        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-        curl_setopt(
-            $ch, CURLOPT_HTTPHEADER, [
-            'accept: application/json',
-            "Authorization: ApiKey $apiKey"
-            ]
-        );
-
-        $response = curl_exec($ch);
-
-        curl_close($ch);
-
-        $data = json_decode($response, true);
-
-        if (empty($data['log'])) {
-            break;
-        }
-
-        foreach ($data['log'] as $key => $entry) {
-            $description = $entry['title'];
-            $timestamp   = $entry['timestamp'];
-            $amount      = isset($entry['data']['deposited']) ? $entry['data']['deposited'] : -$entry['data']['withdrawn'];
-
-            $stmt = $pdo->prepare('INSERT INTO vault (ID, user, timestamp, description, amount) VALUES (:id, :user, :timestamp, :description, :amount)');
-
-            $stmt->bindValue(':id', $key);
-            $stmt->bindValue(':user', $user);
-            $stmt->bindValue(':timestamp', $timestamp);
-            $stmt->bindValue(':description', $description);
-            $stmt->bindValue(':amount', $amount);
-
-            $stmt->execute();
-        }
-
-        $to = end($data['log'])['timestamp'];
-    } while (true);
+        $next = fetchAndStoreLogPage($pdo, $user, $url);
+        $url  = $next;
+    } while ($next !== null);
 }
 
 /**
- * Retrieves the user's log entries from the Torn API
+ * Synchronizes recent vault transactions for a user.
  *
- * @param string  $user  The user to retrieve the log for
- * @param boolean $debug Whether to output debug information (default: false)
+ * On a non-empty database, fetches only entries newer than the user's
+ * most recent row. Falls back to full backfill when the database is
+ * empty.
  *
- * @throws Exception If the user does not have an API key configured,
- *                   if the API call fails, or if the log data is invalid
+ * @param string $user The user whose logs should be synced.
  *
  * @return void
  */
-function getLog($user, $debug = false) {
+function syncUserLogs($user) {
+    if (dbNew()) {
+        backfillUserLogs($user);
+        return;
+    }
+
     $pdo = getDatabaseConnection();
 
-    ensureUserHasApiKey($user);
+    $stmt = $pdo->prepare('SELECT MAX(timestamp) AS max_ts FROM vault WHERE user = :user');
+    $stmt->bindValue(':user', $user);
+    $stmt->execute();
+    $lastTs = (int)$stmt->fetch(PDO::FETCH_ASSOC)['max_ts'];
 
-    $stmt = $pdo->query("SELECT MAX(timestamp) AS max_timestamp FROM vault WHERE user = '$user'");
-    $row  = $stmt->fetch(PDO::FETCH_ASSOC);
+    $url = "https://api.torn.com/v2/user?selections=log&log=5850,5851&from=" . ($lastTs + 1);
 
-    $from = $row['max_timestamp'];
-    $to   = time();
-
-    $apiKey      = USER_KEYS[$user];
-    $apiEndpoint = "https://api.torn.com/user/?selections=log&log=5850,5851&to=$to&from=$from&key=$apiKey";
-
-    $responseData = executeApiCall($apiEndpoint);
-    validateApiResponse($responseData);
-
-    $checkStmt  = prepareCheckStatement($pdo);
-    $insertStmt = prepareInsertStatement($pdo);
-
-    processLogEntries($responseData['log'], $user, $checkStmt, $insertStmt, $debug);
+    do {
+        $next = fetchAndStoreLogPage($pdo, $user, $url);
+        $url  = $next;
+    } while ($next !== null);
 }
 
 /**