Prevent send to token (#6051)

* check contact metadata

* check for tokens in state

* tests

* update tests

* validation only if sending tokens

* container test

8 files changed, 63 insertions, 3 deletions

diff --git a/ui/app/components/send/send-content/send-to-row/send-to-row.component.js b/ui/app/components/send/send-content/send-to-row/send-to-row.component.js
index ce5325314..dbcc4ecd6 100644
--- a/ui/app/components/send/send-content/send-to-row/send-to-row.component.js
+++ b/ui/app/components/send/send-content/send-to-row/send-to-row.component.js
@@ -12,9 +12,11 @@ export default class SendToRow extends Component {
     inError: PropTypes.bool,
     network: PropTypes.string,
     openToDropdown: PropTypes.func,
+    selectedToken: PropTypes.object,
     to: PropTypes.string,
     toAccounts: PropTypes.array,
     toDropdownOpen: PropTypes.bool,
+    tokens: PropTypes.array,
     updateGas: PropTypes.func,
     updateSendTo: PropTypes.func,
     updateSendToError: PropTypes.func,
@@ -26,8 +28,8 @@ export default class SendToRow extends Component {
   }
 
   handleToChange (to, nickname = '', toError) {
-    const { hasHexData, updateSendTo, updateSendToError, updateGas } = this.props
-    const toErrorObject = getToErrorObject(to, toError, hasHexData)
+    const { hasHexData, updateSendTo, updateSendToError, updateGas, tokens, selectedToken } = this.props
+    const toErrorObject = getToErrorObject(to, toError, hasHexData, tokens, selectedToken)
     updateSendTo(to, nickname)
     updateSendToError(toErrorObject)
     if (toErrorObject.to === null) {
diff --git a/ui/app/components/send/send-content/send-to-row/send-to-row.container.js b/ui/app/components/send/send-content/send-to-row/send-to-row.container.js
index 3ee188bad..945cdbaeb 100644
--- a/ui/app/components/send/send-content/send-to-row/send-to-row.container.js
+++ b/ui/app/components/send/send-content/send-to-row/send-to-row.container.js
@@ -1,12 +1,14 @@
 import { connect } from 'react-redux'
 import {
     getCurrentNetwork,
+    getSelectedToken,
     getSendTo,
     getSendToAccounts,
     getSendHexData,
 } from '../../send.selectors.js'
 import {
     getToDropdownOpen,
+    getTokens,
     sendToIsInError,
 } from './send-to-row.selectors.js'
 import {
@@ -26,9 +28,11 @@ function mapStateToProps (state) {
     hasHexData: Boolean(getSendHexData(state)),
     inError: sendToIsInError(state),
     network: getCurrentNetwork(state),
+    selectedToken: getSelectedToken(state),
     to: getSendTo(state),
     toAccounts: getSendToAccounts(state),
     toDropdownOpen: getToDropdownOpen(state),
+    tokens: getTokens(state),
   }
 }
 
diff --git a/ui/app/components/send/send-content/send-to-row/send-to-row.selectors.js b/ui/app/components/send/send-content/send-to-row/send-to-row.selectors.js
index 8919014be..982fd2e46 100644
--- a/ui/app/components/send/send-content/send-to-row/send-to-row.selectors.js
+++ b/ui/app/components/send/send-content/send-to-row/send-to-row.selectors.js
@@ -1,5 +1,6 @@
 const selectors = {
   getToDropdownOpen,
+  getTokens,
   sendToIsInError,
 }
 
@@ -12,3 +13,7 @@ function getToDropdownOpen (state) {
 function sendToIsInError (state) {
     return Boolean(state.send.errors.to)
 }
+
+function getTokens (state) {
+  return state.metamask.tokens
+}
diff --git a/ui/app/components/send/send-content/send-to-row/send-to-row.utils.js b/ui/app/components/send/send-content/send-to-row/send-to-row.utils.js
index 0eeaa3a11..7efd2a772 100644
--- a/ui/app/components/send/send-content/send-to-row/send-to-row.utils.js
+++ b/ui/app/components/send/send-content/send-to-row/send-to-row.utils.js
@@ -1,16 +1,23 @@
 const {
   REQUIRED_ERROR,
   INVALID_RECIPIENT_ADDRESS_ERROR,
+  KNOWN_RECIPIENT_ADDRESS_ERROR,
 } = require('../../send.constants')
 const { isValidAddress } = require('../../../../util')
+import { checkExistingAddresses } from '../../../pages/add-token/util'
 
-function getToErrorObject (to, toError = null, hasHexData = false) {
+const ethUtil = require('ethereumjs-util')
+const contractMap = require('eth-contract-metadata')
+
+function getToErrorObject (to, toError = null, hasHexData = false, tokens = [], selectedToken = null) {
   if (!to) {
     if (!hasHexData) {
       toError = REQUIRED_ERROR
     }
   } else if (!isValidAddress(to) && !toError) {
     toError = INVALID_RECIPIENT_ADDRESS_ERROR
+  } else if (selectedToken && (ethUtil.toChecksumAddress(to) in contractMap || checkExistingAddresses(to, tokens))) {
+    toError = KNOWN_RECIPIENT_ADDRESS_ERROR
   }
 
   return { to: toError }
diff --git a/ui/app/components/send/send-content/send-to-row/tests/send-to-row-container.test.js b/ui/app/components/send/send-content/send-to-row/tests/send-to-row-container.test.js
index dfce7652f..95efdd7cc 100644
--- a/ui/app/components/send/send-content/send-to-row/tests/send-to-row-container.test.js
+++ b/ui/app/components/send/send-content/send-to-row/tests/send-to-row-container.test.js
@@ -24,6 +24,7 @@ proxyquire('../send-to-row.container.js', {
   },
   '../../send.selectors.js': {
     getCurrentNetwork: (s) => `mockNetwork:${s}`,
+    getSelectedToken: (s) => `mockSelectedToken:${s}`,
     getSendHexData: (s) => s,
     getSendTo: (s) => `mockTo:${s}`,
     getSendToAccounts: (s) => `mockToAccounts:${s}`,
@@ -31,6 +32,7 @@ proxyquire('../send-to-row.container.js', {
   './send-to-row.selectors.js': {
     getToDropdownOpen: (s) => `mockToDropdownOpen:${s}`,
     sendToIsInError: (s) => `mockInError:${s}`,
+    getTokens: (s) => `mockTokens:${s}`,
   },
   '../../../../actions': actionSpies,
   '../../../../ducks/send.duck': duckActionSpies,
@@ -45,9 +47,11 @@ describe('send-to-row container', () => {
         hasHexData: true,
         inError: 'mockInError:mockState',
         network: 'mockNetwork:mockState',
+        selectedToken: 'mockSelectedToken:mockState',
         to: 'mockTo:mockState',
         toAccounts: 'mockToAccounts:mockState',
         toDropdownOpen: 'mockToDropdownOpen:mockState',
+        tokens: 'mockTokens:mockState',
       })
     })
 
diff --git a/ui/app/components/send/send-content/send-to-row/tests/send-to-row-selectors.test.js b/ui/app/components/send/send-content/send-to-row/tests/send-to-row-selectors.test.js
index 122ad3265..0fa342d1e 100644
--- a/ui/app/components/send/send-content/send-to-row/tests/send-to-row-selectors.test.js
+++ b/ui/app/components/send/send-content/send-to-row/tests/send-to-row-selectors.test.js
@@ -1,6 +1,7 @@
 import assert from 'assert'
 import {
   getToDropdownOpen,
+  getTokens,
   sendToIsInError,
 } from '../send-to-row.selectors.js'
 
@@ -44,4 +45,15 @@ describe('send-to-row selectors', () => {
     })
   })
 
+  describe('getTokens()', () => {
+    it('should return empty array if no tokens in state', () => {
+      const state = {
+        metamask: {
+          tokens: [],
+        },
+      }
+
+      assert.deepStrictEqual(getTokens(state), [])
+    })
+  })
 })
diff --git a/ui/app/components/send/send-content/send-to-row/tests/send-to-row-utils.test.js b/ui/app/components/send/send-content/send-to-row/tests/send-to-row-utils.test.js
index c779aeb76..8d4f26e15 100644
--- a/ui/app/components/send/send-content/send-to-row/tests/send-to-row-utils.test.js
+++ b/ui/app/components/send/send-content/send-to-row/tests/send-to-row-utils.test.js
@@ -5,6 +5,7 @@ import sinon from 'sinon'
 import {
   REQUIRED_ERROR,
   INVALID_RECIPIENT_ADDRESS_ERROR,
+  KNOWN_RECIPIENT_ADDRESS_ERROR,
 } from '../../../send.constants'
 
 const stubs = {
@@ -52,6 +53,29 @@ describe('send-to-row utils', () => {
         to: 'someExplicitError',
       })
     })
+
+    it('should return a known address recipient if to is truthy but part of state tokens', () => {
+      assert.deepEqual(getToErrorObject('0xabc123', undefined, false, [{'address': '0xabc123'}], {'address': '0xabc123'}), {
+        to: KNOWN_RECIPIENT_ADDRESS_ERROR,
+      })
+    })
+
+    it('should null if to is truthy part of tokens but selectedToken falsy', () => {
+      assert.deepEqual(getToErrorObject('0xabc123', undefined, false, [{'address': '0xabc123'}]), {
+        to: null,
+      })
+    })
+
+    it('should return a known address recipient if to is truthy but part of contract metadata', () => {
+      assert.deepEqual(getToErrorObject('0x89d24a6b4ccb1b6faa2625fe562bdd9a23260359', undefined, false, [{'address': '0xabc123'}], {'address': '0xabc123'}), {
+        to: KNOWN_RECIPIENT_ADDRESS_ERROR,
+      })
+    })
+    it('should null if to is truthy part of contract metadata but selectedToken falsy', () => {
+      assert.deepEqual(getToErrorObject('0x89d24a6b4ccb1b6faa2625fe562bdd9a23260359', undefined, false, [{'address': '0xabc123'}], {'address': '0xabc123'}), {
+        to: KNOWN_RECIPIENT_ADDRESS_ERROR,
+      })
+    })
   })
 
 })
diff --git a/ui/app/components/send/send.constants.js b/ui/app/components/send/send.constants.js
index 8acdf0641..e79734a54 100644
--- a/ui/app/components/send/send.constants.js
+++ b/ui/app/components/send/send.constants.js
@@ -27,6 +27,7 @@ const INSUFFICIENT_TOKENS_ERROR = 'insufficientTokens'
 const NEGATIVE_ETH_ERROR = 'negativeETH'
 const INVALID_RECIPIENT_ADDRESS_ERROR = 'invalidAddressRecipient'
 const REQUIRED_ERROR = 'required'
+const KNOWN_RECIPIENT_ADDRESS_ERROR = 'knownAddressRecipient'
 
 const ONE_GWEI_IN_WEI_HEX = ethUtil.addHexPrefix(conversionUtil('0x1', {
   fromDenomination: 'GWEI',
@@ -42,6 +43,7 @@ module.exports = {
   INSUFFICIENT_FUNDS_ERROR,
   INSUFFICIENT_TOKENS_ERROR,
   INVALID_RECIPIENT_ADDRESS_ERROR,
+  KNOWN_RECIPIENT_ADDRESS_ERROR,
   MIN_GAS_LIMIT_DEC,
   MIN_GAS_LIMIT_HEX,
   MIN_GAS_PRICE_DEC,