Implement Gas limit advanced option & fix calculus estimation

src/bridge/EthereumJSBridge.js

@@ -1,6 +1,7 @@
 // @flow
 import React from 'react'
-import EthereumKind from 'components/FeesField/EthereumKind'
+import FeesField from 'components/FeesField/EthereumKind'
+import AdvancedOptions from 'components/AdvancedOptions/EthereumKind'
 import throttle from 'lodash/throttle'
 import flatMap from 'lodash/flatMap'
 import uniqBy from 'lodash/uniqBy'
@@ -14,10 +15,15 @@ import type { EditProps, WalletBridge } from './types'
 
 // TODO in future it would be neat to support eip55
 
-type Transaction = *
+type Transaction = {
+  amount: number,
+  recipient: string,
+  gasPrice: number,
+  gasLimit: number,
+}
 
 const EditFees = ({ account, onChange, value }: EditProps<Transaction>) => (
-  <EthereumKind
+  <FeesField
     onChange={gasPrice => {
       onChange({ ...value, gasPrice })
     }}
@@ -26,6 +32,15 @@ const EditFees = ({ account, onChange, value }: EditProps<Transaction>) => (
   />
 )
 
+const EditAdvancedOptions = ({ onChange, value }: EditProps<Transaction>) => (
+  <AdvancedOptions
+    gasLimit={value.gasLimit}
+    onChange={gasLimit => {
+      onChange({ ...value, gasLimit })
+    }}
+  />
+)
+
 // in case of a SELF send, 2 ops are returned.
 const txToOps = (account: Account) => (tx: Tx): Operation[] => {
   const freshAddress = account.freshAddress.toLowerCase()
@@ -269,6 +284,7 @@ const EthereumBridge: WalletBridge<Transaction> = {
     amount: 0,
     recipient: '',
     gasPrice: 0,
+    gasLimit: 0x5208,
   }),
 
   editTransactionAmount: (account, t, amount) => ({
@@ -290,10 +306,12 @@ const EthereumBridge: WalletBridge<Transaction> = {
   // $FlowFixMe
   EditFees,
 
-  // FIXME gasPrice calc is wrong... need to multiply with gasLimit I guess ?
-  canBeSpent: (a, t) => Promise.resolve(t.amount + t.gasPrice <= a.balance),
-  getTotalSpent: (a, t) => Promise.resolve(t.amount + t.gasPrice),
-  getMaxAmount: (a, t) => Promise.resolve(a.balance - t.gasPrice),
+  // $FlowFixMe
+  EditAdvancedOptions,
+
+  canBeSpent: (a, t) => Promise.resolve(t.amount <= a.balance),
+  getTotalSpent: (a, t) => Promise.resolve(t.amount + t.gasPrice * t.gasLimit),
+  getMaxAmount: (a, t) => Promise.resolve(a.balance - t.gasPrice * t.gasLimit),
 
   signAndBroadcast: async (a, t, deviceId) => {
     const api = apiForCurrency(a.currency)

src/components/AdvancedOptions/EthereumKind.js

@@ -0,0 +1,36 @@
+// @flow
+import React from 'react'
+import { translate } from 'react-i18next'
+
+import Box from 'components/base/Box'
+import Input from 'components/base/Input'
+import Label from 'components/base/Label'
+import Spoiler from 'components/base/Spoiler'
+
+type Props = {
+  gasLimit: number,
+  onChangeGasLimit: (?number) => void,
+  t: *,
+}
+
+export default translate()(({ gasLimit, onChangeGasLimit, t }: Props) => (
+  <Spoiler title="Advanced options">
+    <Box horizontal align="center" flow={5}>
+      <Box style={{ width: 200 }}>
+        <Label>
+          <span>{t('send:steps.amount.ethereumGasLimit')}</span>
+        </Label>
+      </Box>
+      <Box grow>
+        <Input
+          value={gasLimit}
+          onChange={str => {
+            const gasLimit = parseInt(str, 10)
+            if (!isNaN(gasLimit) && isFinite(gasLimit)) onChangeGasLimit(gasLimit)
+            else onChangeGasLimit(0x5208)
+          }}
+        />
+      </Box>
+    </Box>
+  </Spoiler>
+))

src/helpers/signTransactionForCurrency/ethereum.js

@@ -27,6 +27,7 @@ export default async (
     nonce: string,
     recipient: string,
     gasPrice: number,
+    gasLimit: number,
     amount: number,
   },
 ) => {
@@ -34,11 +35,10 @@ export default async (
 
   const chainId = getNetworkId(currencyId)
   if (!chainId) throw new Error(`chainId not found for currency=${currencyId}`)
-  const gasLimit = '0x5208' // cost of a simple send
   const tx = new EthereumTx({
     nonce: t.nonce,
     gasPrice: `0x${t.gasPrice.toString(16)}`,
-    gasLimit,
+    gasLimit: `0x${t.gasLimit.toString(16)}`,
     to: t.recipient,
     value: `0x${t.amount.toString(16)}`,
     chainId,

static/i18n/en/send.yml

@@ -12,6 +12,7 @@ steps:
     useRBF: Use the RBF transaction
     message: Leave a message (140)
     rippleTag: Tag
+    ethereumGasLimit: Gas limit
   connectDevice:
     title: Connect device
   verification: