diff --git a/src/issuance.rs b/src/issuance.rs
index 74247f928..fcb4a2e98 100644
--- a/src/issuance.rs
+++ b/src/issuance.rs
@@ -14,6 +14,7 @@ use crate::issuance::Error::{
 use crate::keys::{IssuanceAuthorizingKey, IssuanceValidatingKey};
 use crate::note::asset_id::is_asset_desc_of_valid_size;
 use crate::note::{AssetId, Nullifier};
+use crate::primitives::redpallas::Signature;
 use crate::value::NoteValue;
 use crate::{
     primitives::redpallas::{self, SpendAuth},
@@ -21,7 +22,7 @@ use crate::{
 };
 
 /// A bundle of actions to be applied to the ledger.
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct IssueBundle<T: IssueAuth> {
     /// The issuer key for the note being created.
     ik: IssuanceValidatingKey,
@@ -106,20 +107,20 @@ impl IssueAction {
 }
 
 /// Defines the authorization type of an Issue bundle.
-pub trait IssueAuth: fmt::Debug {}
+pub trait IssueAuth: fmt::Debug + Clone {}
 
 /// Marker for an unauthorized bundle with no proofs or signatures.
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct Unauthorized;
 
 /// Marker for an unauthorized bundle with injected sighash.
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct Prepared {
     sighash: [u8; 32],
 }
 
 /// Marker for an authorized bundle.
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct Signed {
     signature: redpallas::Signature<SpendAuth>,
 }
@@ -129,6 +130,11 @@ impl Signed {
     pub fn signature(&self) -> &redpallas::Signature<SpendAuth> {
         &self.signature
     }
+
+    /// Constructs an `Signed` from its constituent parts.
+    pub fn from_parts(signature: Signature<SpendAuth>) -> Self {
+        Signed { signature }
+    }
 }
 
 impl IssueAuth for Unauthorized {}
@@ -176,6 +182,19 @@ impl<T: IssueAuth> IssueBundle<T> {
     pub fn commitment(&self) -> IssueBundleCommitment {
         IssueBundleCommitment(hash_issue_bundle_txid_data(self))
     }
+
+    /// Constructs an `IssueBundle` from its constituent parts.
+    pub fn from_parts(
+        ik: IssuanceValidatingKey,
+        actions: Vec<IssueAction>,
+        authorization: T,
+    ) -> Self {
+        IssueBundle {
+            ik,
+            actions,
+            authorization,
+        }
+    }
 }
 
 impl IssueBundle<Unauthorized> {
diff --git a/src/keys.rs b/src/keys.rs
index dc1d7d77b..9007290a3 100644
--- a/src/keys.rs
+++ b/src/keys.rs
@@ -271,7 +271,7 @@ impl Eq for IssuanceValidatingKey {}
 impl IssuanceValidatingKey {
     /// Converts this spend validating key to its serialized form,
     /// I2LEOSP_256(ik).
-    pub(crate) fn to_bytes(&self) -> [u8; 32] {
+    pub fn to_bytes(&self) -> [u8; 32] {
         // This is correct because the wrapped point must have ỹ = 0, and
         // so the point repr is the same as I2LEOSP of its x-coordinate.
         <[u8; 32]>::from(&self.0)