From f6e6a7b7767f18824950326fba20b59872f2a2e2 Mon Sep 17 00:00:00 2001
From: Tom Etminan <tetmin@gmail.com>
Date: Thu, 7 Oct 2021 17:09:30 +0100
Subject: [PATCH] makes lottery fair (#652)

previous lottery gave first & last members of the chosen array around half the probability of winning vs. other participants since 0.5-1.5 rounds to 1 but only <0.5 rounds to zero.
---
 js/packages/cli/src/fair-launch-cli.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/packages/cli/src/fair-launch-cli.ts b/js/packages/cli/src/fair-launch-cli.ts
index 881b6fe..7ce263a 100755
--- a/js/packages/cli/src/fair-launch-cli.ts
+++ b/js/packages/cli/src/fair-launch-cli.ts
@@ -2388,7 +2388,7 @@ program
 
       console.log('Doing lottery for', numWinnersRemaining);
       while (numWinnersRemaining > 0) {
-        const rand = Math.round(Math.random() * (chosen.length - 1));
+        const rand = Math.floor(Math.random() * (chosen.length));
         if (chosen[rand].chosen != true && chosen[rand].eligible) {
           chosen[rand].chosen = true;
           numWinnersRemaining--;