Add SwapBundle struct

src/bundle.rs

@@ -24,6 +24,7 @@ use crate::{
  note::{AssetBase, Note},
  note_encryption::{OrchardDomain, OrchardDomainCommon},
  orchard_flavor::OrchardFlavor,
+ orchard_flavor::OrchardZSA,
  primitives::redpallas::{self, Binding, SpendAuth},
  tree::Anchor,
  value::{NoteValue, ValueCommitTrapdoor, ValueCommitment, ValueSum},
@@ -456,6 +457,21 @@ impl<A: Authorization, V, D: OrchardDomainCommon> Bundle<A, V, D> {
  }
 }
 
+/// A swap bundle to be applied to the ledger.
+#[derive(Clone, Debug)]
+pub struct SwapBundle<V> {
+ /// The list of action groups that make up this swap bundle.
+ action_groups: Vec<Bundle<Authorized, V, OrchardZSA>>,
+ /// Orchard-specific transaction-level flags for this swap.
+ flags: Flags,
+ /// The net value moved out of this swap.
+ ///
+ /// This is the sum of Orchard spends minus the sum of Orchard outputs.
+ value_balance: V,
+ /// The binding signature for this swap.
+ binding_signature: redpallas::Signature<Binding>,
+}
+
 pub(crate) fn derive_bvk<'a, A: 'a, V: Clone + Into<i64>, FL: 'a + OrchardFlavor>(
  actions: impl IntoIterator<Item = &'a Action<A, FL>>,
  value_balance: V,