Fix first diff adjustmeent if INDEXING_BLOCK_AMOUNT is not -1

backend/src/repositories/BlocksRepository.ts

@@ -612,17 +612,17 @@ class BlocksRepository {
   }
 
   /**
-   * Return the oldest block timestamp from a consecutive chain of block from the most recent one
+   * Return the oldest block  from a consecutive chain of block from the most recent one
    */
-  public async $getOldestConsecutiveBlockTimestamp(): Promise<number> {
+  public async $getOldestConsecutiveBlock(): Promise<any> {
     try {
-      const [rows]: any = await DB.query(`SELECT height, UNIX_TIMESTAMP(blockTimestamp) as timestamp FROM blocks ORDER BY height DESC`);
+      const [rows]: any = await DB.query(`SELECT height, UNIX_TIMESTAMP(blockTimestamp) as timestamp, difficulty FROM blocks ORDER BY height DESC`);
       for (let i = 0; i < rows.length - 1; ++i) {
         if (rows[i].height - rows[i + 1].height > 1) {
-          return rows[i].timestamp;
+          return rows[i];
         }
       }
-      return rows[rows.length - 1].timestamp;
+      return rows[rows.length - 1];
     } catch (e) {
       logger.err('Cannot generate block size and weight history. Reason: ' + (e instanceof Error ? e.message : e));
       throw e;