From 16b4be66638b0109ed9f16ff1a3b16e09d6c42ba Mon Sep 17 00:00:00 2001
From: Henry de Valence <hdevalence@hdevalence.ca>
Date: Sun, 8 Jan 2017 15:04:57 -0500
Subject: [PATCH] Add fixme on SQRT_MINUS_A

---
 src/constants.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/constants.rs b/src/constants.rs
index aeffe6d..a624c6a 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -35,6 +35,9 @@ pub const A: FieldElement       = FieldElement([
     486662, 0, 0, 0, 0, 0, 0, 0, 0, 0, ]);
 
 /// SQRT_MINUS_A is sqrt(-486662)
+// XXX I think that this was used in Adam's code for his elligator
+// implementation, but that should maybe be using sqrt(-486664)
+// instead...?  - hdevalence
 pub const SQRT_MINUS_A: FieldElement = FieldElement([ // sqrtMinusA
         12222970,    8312128,  11511410,  -9067497,  15300785,
     241793,    -25456130, -14121551,  12187136,  -3972024, ]);