Add support for multiple orderings in Provided

Necessary as our Tributary chains needed to agree when a Serai block has
occurred, and when a Monero block has occurred. Since those could happen at the
same time, some validators may put SeraiBlock before ExternalBlock and vice
versa, causing a chain halt. Now they can have distinct ordering queues.

coordinator/tributary/src/tests/block.rs

@@ -69,7 +69,7 @@ fn empty_block() {
   const GENESIS: [u8; 32] = [0xff; 32];
   const LAST: [u8; 32] = [0x01; 32];
   Block::<NonceTransaction>::new(LAST, vec![], vec![])
-    .verify(GENESIS, LAST, &[], HashMap::new())
+    .verify(GENESIS, LAST, HashMap::new(), HashMap::new())
     .unwrap();
 }
 
@@ -89,7 +89,7 @@ fn duplicate_nonces() {
     let res = Block::new(LAST, vec![], mempool).verify(
       GENESIS,
       LAST,
-      &[],
+      HashMap::new(),
       HashMap::from([(<Ristretto as Ciphersuite>::G::identity(), 0)]),
     );
     if i == 1 {

coordinator/tributary/src/tests/blockchain.rs

@@ -1,4 +1,4 @@
-use std::collections::VecDeque;
+use std::collections::{VecDeque, HashMap};
 
 use zeroize::Zeroizing;
 use rand::{RngCore, rngs::OsRng};
@@ -187,10 +187,10 @@ fn provided_transaction() {
   assert_eq!(txs.provide(tx.clone()), Err(ProvidedError::AlreadyProvided));
   assert_eq!(
     ProvidedTransactions::<_, ProvidedTransaction>::new(db.clone(), genesis).transactions,
-    VecDeque::from([tx.clone()]),
+    HashMap::from([("provided", VecDeque::from([tx.clone()]))]),
   );
   let mut txn = db.txn();
-  txs.complete(&mut txn, tx.hash());
+  txs.complete(&mut txn, "provided", tx.hash());
   txn.commit();
   assert!(ProvidedTransactions::<_, ProvidedTransaction>::new(db.clone(), genesis)
     .transactions

coordinator/tributary/src/tests/transaction/mod.rs

@@ -47,7 +47,7 @@ impl ReadWrite for ProvidedTransaction {
 
 impl Transaction for ProvidedTransaction {
   fn kind(&self) -> TransactionKind<'_> {
-    TransactionKind::Provided
+    TransactionKind::Provided("provided")
   }
 
   fn hash(&self) -> [u8; 32] {