Satisfy Scheduler for Bitcoin

processor/scheduler/utxo/primitives/Cargo.toml

@@ -17,8 +17,6 @@ rustdoc-args = ["--cfg", "docsrs"]
 workspace = true
 
 [dependencies]
-async-trait = { version = "0.1", default-features = false }
-
 borsh = { version = "1", default-features = false, features = ["std", "derive", "de_strict_order"] }
 
 serai-primitives = { path = "../../../../substrate/primitives", default-features = false, features = ["std"] }

processor/scheduler/utxo/primitives/src/lib.rs

@@ -39,7 +39,6 @@ pub struct AmortizePlannedTransaction<S: ScannerFeed, ST: SignableTransaction, A
 }
 
 /// An object able to plan a transaction.
-#[async_trait::async_trait]
 pub trait TransactionPlanner<S: ScannerFeed, A>: 'static + Send + Sync {
   /// The type representing a fee rate to use for transactions.
   type FeeRate: Clone + Copy;

processor/scheduler/utxo/standard/src/lib.rs

@@ -203,6 +203,9 @@ impl<S: ScannerFeed, P: TransactionPlanner<S, ()>> Scheduler<S, P> {
       // Fetch the operating costs/outputs
       let mut operating_costs = Db::<S>::operating_costs(txn, coin).0;
       let outputs = Db::<S>::outputs(txn, key, coin).unwrap();
+      if outputs.is_empty() {
+        continue;
+      }
 
       // Fetch the fulfillable payments
       let payments = Self::fulfillable_payments(

processor/scheduler/utxo/transaction-chaining/src/lib.rs

@@ -23,7 +23,7 @@ mod db;
 use db::Db;
 
 /// The outputs which will be effected by a PlannedTransaction and received by Serai.
-pub struct EffectedReceivedOutputs<S: ScannerFeed>(Vec<OutputFor<S>>);
+pub struct EffectedReceivedOutputs<S: ScannerFeed>(pub Vec<OutputFor<S>>);
 
 /// A scheduler of transactions for networks premised on the UTXO model which support
 /// transaction chaining.
@@ -179,6 +179,9 @@ impl<S: ScannerFeed, P: TransactionPlanner<S, EffectedReceivedOutputs<S>>> Sched
       // Fetch the operating costs/outputs
       let mut operating_costs = Db::<S>::operating_costs(txn, coin).0;
       let outputs = Db::<S>::outputs(txn, key, coin).unwrap();
+      if outputs.is_empty() {
+        continue;
+      }
 
       // Fetch the fulfillable payments
       let payments = Self::fulfillable_payments(