From c6ff554d10b8db9f1e23090ce6146910b60e2e05 Mon Sep 17 00:00:00 2001
From: Kris Nuttycombe <kris@nutty.land>
Date: Sat, 23 Mar 2024 10:23:55 -0600
Subject: [PATCH] Add `IncomingViewingKey::prepare` convenience method.

---
 CHANGELOG.md | 1 +
 src/keys.rs  | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 99565489..496c3b3c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ and this project adheres to Rust's notion of
 ## [Unreleased]
 
 ### Added
+- `orchard::keys::IncomingViewingKey::prepare`
 - `orchard::note::Rho`
 - `orchard::action::Action::rho`
 - `orchard::note_encryption::CompactAction::rho`
diff --git a/src/keys.rs b/src/keys.rs
index 8b85bdce..f5bae6cb 100644
--- a/src/keys.rs
+++ b/src/keys.rs
@@ -663,6 +663,11 @@ impl IncomingViewingKey {
     pub fn address(&self, d: Diversifier) -> Address {
         self.ivk.address(d)
     }
+
+    /// Returns the [`PreparedIncomingViewingKey`] for this [`IncomingViewingKey`].
+    pub fn prepare(&self) -> PreparedIncomingViewingKey {
+        PreparedIncomingViewingKey::new(self)
+    }
 }
 
 /// An Orchard incoming viewing key that has been precomputed for trial decryption.