migrations - back fixes

1 files changed, 21 insertions, 18 deletions

diff --git a/app/scripts/migrations/018.js b/app/scripts/migrations/018.js
index d27fe3f46..bea1fe3da 100644
--- a/app/scripts/migrations/018.js
+++ b/app/scripts/migrations/018.js
@@ -29,24 +29,27 @@ module.exports = {
 
 function transformState (state) {
   const newState = state
-  const transactions = newState.TransactionController.transactions
-  newState.TransactionController.transactions = transactions.map((txMeta) => {
-    // no history: initialize
-    if (!txMeta.history || txMeta.history.length === 0) {
-      const snapshot = txStateHistoryHelper.snapshotFromTxMeta(txMeta)
-      txMeta.history = [snapshot]
+  const { TransactionController } = newState
+  if (TransactionController && TransactionController.transactions) {
+    const transactions = newState.TransactionController.transactions
+    newState.TransactionController.transactions = transactions.map((txMeta) => {
+      // no history: initialize
+      if (!txMeta.history || txMeta.history.length === 0) {
+        const snapshot = txStateHistoryHelper.snapshotFromTxMeta(txMeta)
+        txMeta.history = [snapshot]
+        return txMeta
+      }
+      // has history: migrate
+      const newHistory = (
+        txStateHistoryHelper.migrateFromSnapshotsToDiffs(txMeta.history)
+        // remove empty diffs
+        .filter((entry) => {
+          return !Array.isArray(entry) || entry.length > 0
+        })
+      )
+      txMeta.history = newHistory
       return txMeta
-    }
-    // has history: migrate
-    const newHistory = (
-      txStateHistoryHelper.migrateFromSnapshotsToDiffs(txMeta.history)
-      // remove empty diffs
-      .filter((entry) => {
-        return !Array.isArray(entry) || entry.length > 0
-      })
-    )
-    txMeta.history = newHistory
-    return txMeta
-  })
+    })
+  }
   return newState
 }