Add migration to move identities from KeyringController

app/scripts/migrations/026.js

@@ -0,0 +1,40 @@
+const version = 26
+
+/*
+
+This migration moves the identities stored in the KeyringController
+ into the PreferencesController
+
+*/
+
+const clone = require('clone')
+
+module.exports = {
+  version,
+  migrate (originalVersionedData) {
+    const versionedData = clone(originalVersionedData)
+    versionedData.meta.version = version
+    try {
+      const state = versionedData.data
+      versionedData.data = transformState(state)
+    } catch (err) {
+      console.warn(`MetaMask Migration #${version}` + err.stack)
+      return Promise.reject(err)
+    }
+    return Promise.resolve(versionedData)
+  },
+}
+
+function transformState (state) {
+  if (!state.KeyringController || !state.PreferencesController) {
+    return
+  }
+
+  if (!state.KeyringController.walletNicknames) {
+    return state
+  }
+
+  state.PreferencesController.identities = state.KeyringController.walletNicknames
+  delete state.KeyringController.walletNicknames
+  return state
+}

app/scripts/migrations/index.js

@@ -36,4 +36,5 @@ module.exports = [
   require('./023'),
   require('./024'),
   require('./025'),
+  require('./026'),
 ]

test/unit/migrations/026-test.js

@@ -0,0 +1,41 @@
+const assert = require('assert')
+const migration26 = require('../../../app/scripts/migrations/026')
+const oldStorage = {
+  'meta': {'version': 25},
+  'data': {
+    'PreferencesController': {},
+    'KeyringController': {
+      'walletNicknames': {
+        '0x1e77e2': 'Test Account 1',
+        '0x7e57e2': 'Test Account 2',
+      },
+    },
+  },
+}
+
+describe('migration #26', () => {
+  it('should move the identities from KeyringController', (done) => {
+    migration26.migrate(oldStorage)
+      .then((newStorage) => {
+        const identities = newStorage.data.PreferencesController.identities
+        assert.deepEqual(identities, {
+          '0x1e77e2': 'Test Account 1',
+          '0x7e57e2': 'Test Account 2',
+        })
+        assert.strictEqual(newStorage.data.KeyringController.walletNicknames, undefined)
+        done()
+      })
+      .catch(done)
+  })
+
+  it('should successfully migrate first time state', (done) => {
+    migration26.migrate({
+      meta: {},
+      data: require('../../../app/scripts/first-time-state'),
+    })
+      .then((migratedData) => {
+        assert.equal(migratedData.meta.version, migration26.version)
+        done()
+      }).catch(done)
+  })
+})