From 1af3ac63de9be4d30823b51ab790a2306139cdea Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Sun, 18 Sep 2016 12:30:23 -0700
Subject: [PATCH] chain: bip147.

---
 lib/chain/chain.js | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/lib/chain/chain.js b/lib/chain/chain.js
index 9090a265..2eee5a96 100644
--- a/lib/chain/chain.js
+++ b/lib/chain/chain.js
@@ -544,10 +544,14 @@ Chain.prototype.getDeployments = function getDeployments(block, prev, ancestors,
         if (err)
           return next(err);
 
-        if (active && self.options.witness) {
-          state.flags |= constants.flags.VERIFY_WITNESS;
-          if (!self.state.hasWitness())
-            self.logger.warning('Segwit has been activated.');
+        if (active) {
+          // BIP147
+          // state.flags |= constants.flags.VERIFY_NULLDUMMY;
+          if (self.options.witness) {
+            state.flags |= constants.flags.VERIFY_WITNESS;
+            if (!self.state.hasWitness())
+              self.logger.warning('Segwit has been activated.');
+          }
         }
 
         next();