Improve provided handling (#381)

* fix typos

* remove tributary sleeping

* handle not locally provided txs

* use topic number instead of waiting list

* Clean-up, fixes

1) Uses a single TXN in provided
2) Doesn't continue on non-local provided inside verify_block, skipping further
   execution of checks
3) Upon local provision of already on-chain TX, compares

---------

Co-authored-by: Luke Parker <lukeparker5132@gmail.com>

coordinator/tributary/src/lib.rs

@@ -397,6 +397,10 @@ impl<D: Db, T: TransactionTrait> TributaryReader<D, T> {
       .map(|commit| Commit::<Validators>::decode(&mut commit.as_ref()).unwrap().end_time)
   }
 
+  pub fn locally_provided_txs_in_block(&self, hash: &[u8; 32], order: &str) -> bool {
+    Blockchain::<D, T>::locally_provided_txs_in_block(&self.0, &self.1, hash, order)
+  }
+
   // This isn't static, yet can be read with only minor discrepancy risks
   pub fn tip(&self) -> [u8; 32] {
     Blockchain::<D, T>::tip_from_db(&self.0, self.1)