From 8c474c1784ba9686790033034e1c87c0dbdd90d9 Mon Sep 17 00:00:00 2001
From: Con Kolivas <kernel@kolivas.org>
Date: Mon, 14 Dec 2015 17:34:48 +1100
Subject: [PATCH] Support low diffs like those on testnet

---
 src/libckpool.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/libckpool.c b/src/libckpool.c
index 4c315dfb..8e08253a 100644
--- a/src/libckpool.c
+++ b/src/libckpool.c
@@ -1982,6 +1982,8 @@ double diff_from_nbits(char *nbits)
 
 	pow = nbits[0];
 	powdiff = (8 * (0x1d - 3)) - (8 * (pow - 3));
+	if (powdiff < 8)
+		powdiff = 8;
 	diff32 = be32toh(*((uint32_t *)nbits)) & 0x00FFFFFF;
 	numerator = 0xFFFFULL << powdiff;
 	return numerator / (double)diff32;