From c45b076df9f6042ceeb1a3910cf227654fb79a55 Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Tue, 11 Oct 2016 18:13:26 +0100
Subject: [PATCH] More commentary

---
 src/Signup.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Signup.js b/src/Signup.js
index 13cb9b47fd..e387513c90 100644
--- a/src/Signup.js
+++ b/src/Signup.js
@@ -135,6 +135,10 @@ class Register extends Signup {
         // generate one for this session. It will only be used if
         // we do email verification, but far simpler to just make
         // sure we have one.
+        // We re-use this same secret over multiple calls to register
+        // so that the identity server can honour the sendAttempt
+        // parameter and not re-send email unless we actually want
+        // another mail to be sent.
         if (!this.params.clientSecret) {
             this.params.clientSecret = client.generateClientSecret();
         }