Merge pull request #2068 from MetaMask/export-as-file

Allow exporting seed words and private keys as files

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## Current Master
 
+- Add ability to export private keys as a file.
+- Add ability to export seed words as a file.
+
 ## 3.10.0 2017-9-11
 
 - Readded loose keyring label back into the account list.

ui/app/components/account-export.js

@@ -1,6 +1,7 @@
 const Component = require('react').Component
 const h = require('react-hyperscript')
 const inherits = require('util').inherits
+const exportAsFile = require('../util').exportAsFile
 const copyToClipboard = require('copy-to-clipboard')
 const actions = require('../actions')
 const ethUtil = require('ethereumjs-util')
@@ -20,20 +21,21 @@ function mapStateToProps (state) {
 }
 
 ExportAccountView.prototype.render = function () {
-  var state = this.props
+  const state = this.props
-  var accountDetail = state.accountDetail
+  const accountDetail = state.accountDetail
+  const nickname = state.identities[state.address].name
 
   if (!accountDetail) return h('div')
-  var accountExport = accountDetail.accountExport
+  const accountExport = accountDetail.accountExport
 
-  var notExporting = accountExport === 'none'
+  const notExporting = accountExport === 'none'
-  var exportRequested = accountExport === 'requested'
+  const exportRequested = accountExport === 'requested'
-  var accountExported = accountExport === 'completed'
+  const accountExported = accountExport === 'completed'
 
   if (notExporting) return h('div')
 
   if (exportRequested) {
-    var warning = `Export private keys at your own risk.`
+    const warning = `Export private keys at your own risk.`
     return (
       h('div', {
         style: {
@@ -89,6 +91,8 @@ ExportAccountView.prototype.render = function () {
   }
 
   if (accountExported) {
+    const plainKey = ethUtil.stripHexPrefix(accountDetail.privateKey)
+
     return h('div.privateKey', {
       style: {
         margin: '0 20px',
@@ -105,10 +109,16 @@ ExportAccountView.prototype.render = function () {
         onClick: function (event) {
           copyToClipboard(ethUtil.stripHexPrefix(accountDetail.privateKey))
         },
-      }, ethUtil.stripHexPrefix(accountDetail.privateKey)),
+      }, plainKey),
       h('button', {
         onClick: () => this.props.dispatch(actions.backToAccountDetail(this.props.address)),
       }, 'Done'),
+      h('button', {
+        style: {
+          marginLeft: '10px',
+        },
+        onClick: () => exportAsFile(`MetaMask ${nickname} Private Key`, plainKey),
+      }, 'Save as File'),
     ])
   }
 }
@@ -117,6 +127,6 @@ ExportAccountView.prototype.onExportKeyPress = function (event) {
   if (event.key !== 'Enter') return
   event.preventDefault()
 
-  var input = document.getElementById('exportAccount').value
+  const input = document.getElementById('exportAccount').value
   this.props.dispatch(actions.exportAccount(input, this.props.address))
 }

ui/app/keychains/hd/create-vault-complete.js

@@ -3,6 +3,7 @@ const Component = require('react').Component
 const connect = require('react-redux').connect
 const h = require('react-hyperscript')
 const actions = require('../../actions')
+const exportAsFile = require('../../util').exportAsFile
 
 module.exports = connect(mapStateToProps)(CreateVaultCompleteScreen)
 
@@ -65,8 +66,17 @@ CreateVaultCompleteScreen.prototype.render = function () {
         style: {
           margin: '24px',
           fontSize: '0.9em',
+          marginBottom: '10px',
         },
       }, 'I\'ve copied it somewhere safe'),
+
+      h('button.primary', {
+        onClick: () => exportAsFile(`MetaMask Seed Words`, seed),
+        style: {
+          margin: '10px',
+          fontSize: '0.9em',
+        },
+      }, 'Save Seed Words As File'),
     ])
   )
 }

ui/app/util.js

@@ -36,6 +36,7 @@ module.exports = {
   valueTable: valueTable,
   bnTable: bnTable,
   isHex: isHex,
+  exportAsFile: exportAsFile,
 }
 
 function valuesFor (obj) {
@@ -215,3 +216,18 @@ function readableDate (ms) {
 function isHex (str) {
   return Boolean(str.match(/^(0x)?[0-9a-fA-F]+$/))
 }
+
+function exportAsFile (filename, data) {
+  // source: https://stackoverflow.com/a/33542499 by Ludovic Feltz
+  const blob = new Blob([data], {type: 'text/csv'})
+  if (window.navigator.msSaveOrOpenBlob) {
+    window.navigator.msSaveBlob(blob, filename)
+  } else {
+    const elem = window.document.createElement('a')
+    elem.href = window.URL.createObjectURL(blob)
+    elem.download = filename
+    document.body.appendChild(elem)
+    elem.click()
+    document.body.removeChild(elem)
+  }
+}