Merge pull request #4279 from MetaMask/network-remove-provider-engine

Enhancement: New BlockTracker and Json-Rpc-Engine based Provider

1 files changed, 14 insertions, 0 deletions

diff --git a/app/scripts/lib/util.js b/app/scripts/lib/util.js
index d7423f2ad..ea13b26be 100644
--- a/app/scripts/lib/util.js
+++ b/app/scripts/lib/util.js
@@ -127,7 +127,21 @@ function BnMultiplyByFraction (targetBN, numerator, denominator) {
   return targetBN.mul(numBN).div(denomBN)
 }
 
+function applyListeners (listeners, emitter) {
+  Object.keys(listeners).forEach((key) => {
+    emitter.on(key, listeners[key])
+  })
+}
+
+function removeListeners (listeners, emitter) {
+  Object.keys(listeners).forEach((key) => {
+    emitter.removeListener(key, listeners[key])
+  })
+}
+
 module.exports = {
+  removeListeners,
+  applyListeners,
   getPlatform,
   getStack,
   getEnvironmentType,