message: NO-TICK: Reuse LMDB txn.
diff: @@ -533,7 +533,7 @@ impl Storage {
  let mut txn = self.env.begin_ro_txn()?;
  let block: Block = if let Some(block) =
  - self.get_single_block(&mut self.env.begin_ro_txn()?, &block_hash)?
  + self.get_single_block(&mut txn, &block_hash)?
  {
  block
  } else {
  