Ensure correct tx category when sending to contracts without tx data (#7252)

* Ensure correct transaction category when sending to contracts but there is no txParams data

* Update gas when pasting address in send

* Gracefully fall back is send.util/estimateGas when blockGasLimit from background is falsy

* Remove network request frontend fallback for blockGasLimit

* Add some needed slow downs to e2e tests

app/scripts/controllers/transactions/index.js

@@ -603,21 +603,21 @@ class TransactionController extends EventEmitter {
     ].find(tokenMethodName => tokenMethodName === name && name.toLowerCase())
 
     let result
-    let code
-    if (!txParams.data) {
-      result = SEND_ETHER_ACTION_KEY
-    } else if (tokenMethodName) {
+    if (txParams.data && tokenMethodName) {
       result = tokenMethodName
-    } else if (!to) {
+    } else if (txParams.data && !to) {
       result = DEPLOY_CONTRACT_ACTION_KEY
-    } else {
+    }
+
+    let code
+    if (!result) {
       try {
         code = await this.query.getCode(to)
       } catch (e) {
         code = null
         log.warn(e)
       }
-      // For an address with no code, geth will return '0x', and ganache-core v2.2.1 will return '0x0'
+
       const codeIsEmpty = !code || code === '0x' || code === '0x0'
 
       result = codeIsEmpty ? SEND_ETHER_ACTION_KEY : CONTRACT_INTERACTION_KEY

test/e2e/metamask-ui.spec.js

@@ -567,18 +567,18 @@ describe('MetaMask', function () {
 
       const send3eth = await findElement(driver, By.xpath(`//button[contains(text(), 'Send')]`), 10000)
       await send3eth.click()
-      await delay(regularDelayMs)
+      await delay(largeDelayMs * 2)
 
       const contractDeployment = await findElement(driver, By.xpath(`//button[contains(text(), 'Deploy Contract')]`), 10000)
       await contractDeployment.click()
-      await delay(regularDelayMs)
+      await delay(largeDelayMs * 2)
 
       await send3eth.click()
       await contractDeployment.click()
-      await delay(regularDelayMs)
+      await delay(largeDelayMs * 2)
 
       await driver.switchTo().window(extension)
-      await delay(regularDelayMs)
+      await delay(largeDelayMs * 2)
 
       let transactions = await findElements(driver, By.css('.transaction-list-item'))
       await transactions[3].click()

test/unit/app/controllers/transactions/tx-controller-test.js

@@ -622,6 +622,36 @@ describe('Transaction Controller', function () {
       })
       assert.deepEqual(result, { transactionCategory: CONTRACT_INTERACTION_KEY, getCodeResponse: '0x0a' })
     })
+
+    it('should return a contract interaction transactionCategory with the correct getCodeResponse when to is a contract address and data is falsey', async function () {
+      const _providerResultStub = {
+        // 1 gwei
+        eth_gasPrice: '0x0de0b6b3a7640000',
+        // by default, all accounts are external accounts (not contracts)
+        eth_getCode: '0xa',
+      }
+      const _provider = createTestProviderTools({ scaffold: _providerResultStub }).provider
+      const _fromAccount = getTestAccounts()[0]
+      const _blockTrackerStub = new EventEmitter()
+      _blockTrackerStub.getCurrentBlock = noop
+      _blockTrackerStub.getLatestBlock = noop
+      const _txController = new TransactionController({
+        provider: _provider,
+        getGasPrice: function () { return '0xee6b2800' },
+        networkStore: new ObservableStore(currentNetworkId),
+        txHistoryLimit: 10,
+        blockTracker: _blockTrackerStub,
+        signTransaction: (ethTx) => new Promise((resolve) => {
+          ethTx.sign(_fromAccount.key)
+          resolve()
+        }),
+      })
+      const result = await _txController._determineTransactionCategory({
+        to: '0x9e673399f795D01116e9A8B2dD2F156705131ee9',
+        data: '',
+      })
+      assert.deepEqual(result, { transactionCategory: CONTRACT_INTERACTION_KEY, getCodeResponse: '0x0a' })
+    })
   })
 
   describe('#getPendingTransactions', function () {

ui/app/pages/send/send.component.js

@@ -304,7 +304,7 @@ export default class SendTransactionScreen extends PersistentForm {
         }}
         onChange={this.onRecipientInputChange}
         onValidAddressTyped={(address) => this.props.updateSendTo(address, '')}
-        onPaste={text => this.props.updateSendTo(text)}
+        onPaste={text => { this.props.updateSendTo(text) && this.updateGas() }}
         onReset={() => this.props.updateSendTo('', '')}
         updateEnsResolution={this.props.updateSendEnsResolution}
         updateEnsResolutionError={this.props.updateSendEnsResolutionError}

ui/app/pages/send/send.constants.js

@@ -6,6 +6,8 @@ const MIN_GAS_PRICE_HEX = (parseInt(MIN_GAS_PRICE_DEC)).toString(16)
 const MIN_GAS_LIMIT_DEC = '21000'
 const MIN_GAS_LIMIT_HEX = (parseInt(MIN_GAS_LIMIT_DEC)).toString(16)
 
+const ARBITRARY_HIGH_BLOCK_GAS_LIMIT = (parseInt('8000000')).toString(16)
+
 const MIN_GAS_PRICE_GWEI = ethUtil.addHexPrefix(conversionUtil(MIN_GAS_PRICE_HEX, {
   fromDenomination: 'WEI',
   toDenomination: 'GWEI',
@@ -58,4 +60,5 @@ module.exports = {
   SIMPLE_GAS_COST,
   TOKEN_TRANSFER_FUNCTION_SIGNATURE,
   BASE_TOKEN_GAS_COST,
+  ARBITRARY_HIGH_BLOCK_GAS_LIMIT,
 }

ui/app/pages/send/send.utils.js

@@ -18,6 +18,7 @@ const {
   ONE_GWEI_IN_WEI_HEX,
   SIMPLE_GAS_COST,
   TOKEN_TRANSFER_FUNCTION_SIGNATURE,
+  ARBITRARY_HIGH_BLOCK_GAS_LIMIT,
 } = require('./send.constants')
 const abi = require('ethereumjs-abi')
 const ethUtil = require('ethereumjs-util')
@@ -243,12 +244,17 @@ async function estimateGas ({
   }
 
   // if not, fall back to block gasLimit
+  if (!blockGasLimit) {
+    blockGasLimit = ARBITRARY_HIGH_BLOCK_GAS_LIMIT
+  }
+
   paramsForGasEstimate.gas = ethUtil.addHexPrefix(multiplyCurrencies(blockGasLimit, 0.95, {
     multiplicandBase: 16,
     multiplierBase: 10,
     roundDown: '0',
     toNumericBase: 'hex',
   }))
+
   // run tx
   return new Promise((resolve, reject) => {
     return estimateGasMethod(paramsForGasEstimate, (err, estimatedGas) => {