From 572d74e1a09c5d69051bc4569ac4f64030183193 Mon Sep 17 00:00:00 2001
From: Jack Grigg <jack@electriccoin.co>
Date: Fri, 11 Jun 2021 18:22:38 +0100
Subject: [PATCH] Add an Assigned::invert method

---
 src/plonk/circuit.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/plonk/circuit.rs b/src/plonk/circuit.rs
index 3d6249b3..457b909e 100644
--- a/src/plonk/circuit.rs
+++ b/src/plonk/circuit.rs
@@ -366,6 +366,14 @@ impl<F: Field> Assigned<F> {
         self.denominator
     }
 
+    /// Inverts this assigned value.
+    pub fn invert(&self) -> Self {
+        Assigned {
+            numerator: self.denominator,
+            denominator: self.numerator,
+        }
+    }
+
     /// Evaluates this assigned value directly, performing an unbatched inversion if
     /// necessary.
     ///