From accd057b1abf519551dab253845085c40eb1415c Mon Sep 17 00:00:00 2001
From: kumavis <aaron@kumavis.me>
Date: Mon, 14 Aug 2017 18:46:18 -0700
Subject: migration 18 - move to diff-based history

---
 app/scripts/migrations/018.js | 52 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 app/scripts/migrations/018.js

(limited to 'app/scripts/migrations/018.js')

diff --git a/app/scripts/migrations/018.js b/app/scripts/migrations/018.js
new file mode 100644
index 000000000..c8d2332ab
--- /dev/null
+++ b/app/scripts/migrations/018.js
@@ -0,0 +1,52 @@
+const version = 18
+
+/*
+
+This migration updates "transaction state history" to diffs style
+
+*/
+
+const clone = require('clone')
+const txStateHistoryHelper = require('../tx-state-history-helper')
+
+
+module.exports = {
+  version,
+
+  migrate: function (originalVersionedData) {
+    const versionedData = clone(originalVersionedData)
+    versionedData.meta.version = version
+    try {
+      const state = versionedData.data
+      const newState = transformState(state)
+      versionedData.data = newState
+    } catch (err) {
+      console.warn(`MetaMask Migration #${version}` + err.stack)
+    }
+    return Promise.resolve(versionedData)
+  },
+}
+
+function transformState (state) {
+  const newState = state
+  const transactions = newState.TransactionController.transactions
+  newState.TransactionController.transactions = transactions.map((txMeta) => {
+    // no history: initialize
+    if (!txMeta.history || tx.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
+  })
+  return newState
+}
-- 
cgit v1.2.3


From 1af797b1b3a37d8fe00afbd0d84cb3349b8fd471 Mon Sep 17 00:00:00 2001
From: kumavis <aaron@kumavis.me>
Date: Mon, 14 Aug 2017 19:15:36 -0700
Subject: tx controller - tx state history various small fixes

---
 app/scripts/migrations/018.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'app/scripts/migrations/018.js')

diff --git a/app/scripts/migrations/018.js b/app/scripts/migrations/018.js
index c8d2332ab..41e7de391 100644
--- a/app/scripts/migrations/018.js
+++ b/app/scripts/migrations/018.js
@@ -32,7 +32,7 @@ function transformState (state) {
   const transactions = newState.TransactionController.transactions
   newState.TransactionController.transactions = transactions.map((txMeta) => {
     // no history: initialize
-    if (!txMeta.history || tx.history.length === 0) {
+    if (!txMeta.history || txMeta.history.length === 0) {
       const snapshot = txStateHistoryHelper.snapshotFromTxMeta(txMeta)
       txMeta.history = [snapshot]
       return txMeta
-- 
cgit v1.2.3


From ac2b572c3442a42286f3d10be454e3b21d06dde8 Mon Sep 17 00:00:00 2001
From: kumavis <aaron@kumavis.me>
Date: Mon, 14 Aug 2017 20:05:57 -0700
Subject: migration 18 - fix an oops

---
 app/scripts/migrations/018.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'app/scripts/migrations/018.js')

diff --git a/app/scripts/migrations/018.js b/app/scripts/migrations/018.js
index 41e7de391..d27fe3f46 100644
--- a/app/scripts/migrations/018.js
+++ b/app/scripts/migrations/018.js
@@ -7,7 +7,7 @@ This migration updates "transaction state history" to diffs style
 */
 
 const clone = require('clone')
-const txStateHistoryHelper = require('../tx-state-history-helper')
+const txStateHistoryHelper = require('../lib/tx-state-history-helper')
 
 
 module.exports = {
-- 
cgit v1.2.3