1 files changed, 77 insertions, 3 deletions

diff --git a/app/scripts/controllers/preferences.js b/app/scripts/controllers/preferences.js
index a4ff1207e..a5d8cc27b 100644
--- a/app/scripts/controllers/preferences.js
+++ b/app/scripts/controllers/preferences.js
@@ -2,6 +2,7 @@ const ObservableStore = require('obs-store')
 const normalizeAddress = require('eth-sig-util').normalize
 const extend = require('xtend')
 
+
 class PreferencesController {
 
   /**
@@ -28,7 +29,11 @@ class PreferencesController {
       featureFlags: {},
       currentLocale: opts.initLangCode,
       identities: {},
+      lostIdentities: {},
     }, opts.initState)
+
+    this.diagnostics = opts.diagnostics
+
     this.store = new ObservableStore(initState)
   }
 // PUBLIC METHODS
@@ -63,6 +68,13 @@ class PreferencesController {
     this.store.updateState({ currentLocale: key })
   }
 
+  /**
+   * Updates identities to only include specified addresses. Removes identities
+   * not included in addresses array
+   *
+   * @param {string[]} addresses An array of hex addresses
+   *
+   */
   setAddresses (addresses) {
     const oldIdentities = this.store.getState().identities
     const identities = addresses.reduce((ids, address, index) => {
@@ -74,6 +86,68 @@ class PreferencesController {
   }
 
   /**
+   * Adds addresses to the identities object without removing identities
+   *
+   * @param {string[]} addresses An array of hex addresses
+   *
+   */
+  addAddresses (addresses) {
+    const identities = this.store.getState().identities
+    addresses.forEach((address) => {
+      // skip if already exists
+      if (identities[address]) return
+      // add missing identity
+      const identityCount = Object.keys(identities).length
+      identities[address] = { name: `Account ${identityCount + 1}`, address }
+    })
+    this.store.updateState({ identities })
+  }
+
+  /*
+   * Synchronizes identity entries with known accounts.
+   * Removes any unknown identities, and returns the resulting selected address.
+   *
+   * @param {Array<string>} addresses known to the vault.
+   * @returns {Promise<string>} selectedAddress the selected address.
+   */
+  syncAddresses (addresses) {
+    let { identities, lostIdentities } = this.store.getState()
+
+    let newlyLost = {}
+    Object.keys(identities).forEach((identity) => {
+      if (!addresses.includes(identity)) {
+        newlyLost[identity] = identities[identity]
+        delete identities[identity]
+      }
+    })
+
+    // Identities are no longer present.
+    if (Object.keys(newlyLost).length > 0) {
+
+      // Notify our servers:
+      if (this.diagnostics) this.diagnostics.reportOrphans(newlyLost)
+
+      // store lost accounts
+      for (let key in newlyLost) {
+        lostIdentities[key] = newlyLost[key]
+      }
+    }
+
+    this.store.updateState({ identities, lostIdentities })
+    this.addAddresses(addresses)
+
+    // If the selected account is no longer valid,
+    // select an arbitrary other account:
+    let selected = this.getSelectedAddress()
+    if (!addresses.includes(selected)) {
+      selected = addresses[0]
+      this.setSelectedAddress(selected)
+    }
+
+    return selected
+  }
+
+  /**
    * Setter for the `selectedAddress` property
    *
    * @param {string} _address A new hex address for an account
@@ -111,7 +185,7 @@ class PreferencesController {
   /**
    * Adds a new token to the token array, or updates the token if passed an address that already exists.
    * Modifies the existing tokens array from the store. All objects in the tokens array array AddedToken objects.
-   * @see AddedToken {@link AddedToken} 
+   * @see AddedToken {@link AddedToken}
    *
    * @param {string} rawAddress Hex address of the token contract. May or may not be a checksum address.
    * @param {string} symbol The symbol of the token
@@ -197,7 +271,7 @@ class PreferencesController {
   }
 
   /**
-   * Setter for the `currentAccountTab` property 
+   * Setter for the `currentAccountTab` property
    *
    * @param {string} currentAccountTab Specifies the new tab to be marked as current
    * @returns {Promise<void>} Promise resolves with undefined
@@ -215,7 +289,7 @@ class PreferencesController {
    * The returned list will have a max length of 2. If the _url currently exists it the list, it will be moved to the
    * end of the list. The current list is modified and returned as a promise.
    *
-   * @param {string} _url The rpc url to add to the frequentRpcList. 
+   * @param {string} _url The rpc url to add to the frequentRpcList.
    * @returns {Promise<array>} The updated frequentRpcList.
    *
    */