tx state history - fix bug where initial snapshot was mutated on updateTx

2 files changed, 3 insertions, 2 deletions

diff --git a/app/scripts/lib/tx-state-history-helper.js b/app/scripts/lib/tx-state-history-helper.js
index 304069d57..5ebd78689 100644
--- a/app/scripts/lib/tx-state-history-helper.js
+++ b/app/scripts/lib/tx-state-history-helper.js
@@ -24,7 +24,8 @@ function generateHistoryEntry(previousState, newState) {
   return jsonDiffer.compare(previousState, newState)
 }
 
-function replayHistory(shortHistory) {
+function replayHistory(_shortHistory) {
+  const shortHistory = clone(_shortHistory)
   return shortHistory.reduce((val, entry) => jsonDiffer.applyPatch(val, entry).newDocument)
 }
 
diff --git a/app/scripts/lib/tx-state-manager.js b/app/scripts/lib/tx-state-manager.js
index abb9d7910..4493889bf 100644
--- a/app/scripts/lib/tx-state-manager.js
+++ b/app/scripts/lib/tx-state-manager.js
@@ -97,7 +97,7 @@ module.exports = class TransactionStateManger extends EventEmitter {
     const previousState = txStateHistoryHelper.replayHistory(txMeta.history)
     // generate history entry and add to history
     const entry = txStateHistoryHelper.generateHistoryEntry(previousState, currentState)
-   txMeta.history.push(entry)
+    txMeta.history.push(entry)
 
     // commit txMeta to state
     const txId = txMeta.id