refactor tx gas eestimation method to one functions which supports both execution and approval

src/logic/safe/transactions/gasNew.js

@@ -1,57 +1,53 @@
 // @flow
 import GnosisSafeSol from '@gnosis.pm/safe-contracts/build/contracts/GnosisSafe.json'
 import { getWeb3, getAccountFrom } from '~/logic/wallets/getWeb3'
-import { type Operation } from '~/logic/safe/transactions'
 import { calculateGasOf, calculateGasPrice } from '~/logic/wallets/ethTransactions'
 import { ZERO_ADDRESS } from '~/logic/wallets/ethAddresses'
+import { type Transaction } from '~/routes/safe/store/models/transaction'
 import { CALL } from '.'
 
-export const estimateApprovalTxGasCosts = async (safeAddress: string, to: string, data: string): Promise<number> => {
+export const estimateTxGasCosts = async (
+  safeAddress: string,
+  to: string,
+  data: string,
+  tx?: Transaction,
+): Promise<number> => {
   try {
     const web3 = getWeb3()
     const from = await getAccountFrom(web3)
     const safeInstance = new web3.eth.Contract(GnosisSafeSol.abi, safeAddress)
     const nonce = await safeInstance.methods.nonce().call()
+    const threshold = await safeInstance.methods.getThreshold().call()
+
+    const isExecution = (tx && tx.confirmations.size) || threshold === '1'
+
+    let txData
+    if (isExecution) {
+      // https://gnosis-safe.readthedocs.io/en/latest/contracts/signatures.html#pre-validated-signatures
+      const signatures = tx
+        || `0x000000000000000000000000${from.replace(
+          '0x',
+          '',
+        )}000000000000000000000000000000000000000000000000000000000000000001`
+      txData = await safeInstance.methods
+        .execTransaction(to, 0, data, CALL, 0, 0, 0, ZERO_ADDRESS, ZERO_ADDRESS, signatures)
+        .encodeABI()
+    } else {
       const txHash = await safeInstance.methods
         .getTransactionHash(to, 0, data, CALL, 0, 0, 0, ZERO_ADDRESS, ZERO_ADDRESS, nonce)
         .call({
           from,
         })
-    const approvalData = await safeInstance.methods.approveHash(txHash).encodeABI()
-    const gas = await calculateGasOf(approvalData, from, safeAddress)
-    const gasPrice = await calculateGasPrice()
-
-    return gas * parseInt(gasPrice, 10)
-  } catch (err) {
-    console.error(`Error while estimating approval transaction gas costs: ${err}`)
-
-    return 1000000000000000
-  }
+      txData = await safeInstance.methods.approveHash(txHash).encodeABI()
     }
 
-export const estimateExecuteTxGasCosts = async (
-  safeInstance: any,
-  to: string,
-  valueInWei: number | string,
-  data: string,
-  operation: Operation,
-  nonce: string | number,
-  sender: string,
-  sigs: string,
-): Promise<number> => {
-  try {
-    const web3 = getWeb3()
-    const contract = new web3.eth.Contract(GnosisSafeSol.abi, safeInstance.address)
-    const executionData = await contract.methods
-      .execTransaction(to, valueInWei, data, operation, 0, 0, 0, ZERO_ADDRESS, ZERO_ADDRESS)
-      .encodeABI()
-    const gas = await calculateGasOf(executionData, sender, safeInstance.address)
+    const gas = await calculateGasOf(txData, from, safeAddress)
     const gasPrice = await calculateGasPrice()
 
     return gas * parseInt(gasPrice, 10)
   } catch (err) {
     console.error(`Error while estimating transaction execution gas costs: ${err}`)
 
-    return 0.001
+    return 10000
   }
 }

src/routes/safe/components/Balances/SendModal/screens/ReviewCustomTx/index.jsx

@@ -16,7 +16,7 @@ import EtherscanBtn from '~/components/EtherscanBtn'
 import CopyBtn from '~/components/CopyBtn'
 import SafeInfo from '~/routes/safe/components/Balances/SendModal/SafeInfo'
 import { setImageToPlaceholder } from '~/routes/safe/components/Balances/utils'
-import { estimateApprovalTxGasCosts } from '~/logic/safe/transactions/gasNew'
+import { estimateTxGasCosts } from '~/logic/safe/transactions/gasNew'
 import { getWeb3 } from '~/logic/wallets/getWeb3'
 import { TX_NOTIFICATION_TYPES } from '~/logic/safe/transactions'
 import { getEthAsToken } from '~/logic/tokens/utils/tokenHelpers'
@@ -57,7 +57,7 @@ const ReviewCustomTx = ({
       const web3 = getWeb3()
       const { fromWei, toBN } = web3.utils
 
-      const estimatedGasCosts = await estimateApprovalTxGasCosts(safeAddress, tx.recipientAddress, tx.data.trim())
+      const estimatedGasCosts = await estimateTxGasCosts(safeAddress, tx.recipientAddress, tx.data.trim())
       const gasCostsAsEth = fromWei(toBN(estimatedGasCosts), 'ether')
       const formattedGasCosts = formatAmount(gasCostsAsEth)
       if (isCurrent) {

src/routes/safe/components/Balances/SendModal/screens/ReviewTx/index.jsx

@@ -18,7 +18,7 @@ import Hairline from '~/components/layout/Hairline'
 import SafeInfo from '~/routes/safe/components/Balances/SendModal/SafeInfo'
 import { setImageToPlaceholder } from '~/routes/safe/components/Balances/utils'
 import { getStandardTokenContract, getHumanFriendlyToken } from '~/logic/tokens/store/actions/fetchTokens'
-import { estimateApprovalTxGasCosts } from '~/logic/safe/transactions/gasNew'
+import { estimateTxGasCosts } from '~/logic/safe/transactions/gasNew'
 import { EMPTY_DATA } from '~/logic/wallets/ethTransactions'
 import { formatAmount } from '~/logic/tokens/utils/formatAmount'
 import { getWeb3 } from '~/logic/wallets/getWeb3'
@@ -70,7 +70,7 @@ const ReviewTx = ({
         txData = tokenInstance.contract.methods.transfer(tx.recipientAddress, 0).encodeABI()
       }
 
-      const estimatedGasCosts = await estimateApprovalTxGasCosts(safeAddress, txRecipient, txData)
+      const estimatedGasCosts = await estimateTxGasCosts(safeAddress, txRecipient, txData)
       const gasCostsAsEth = fromWei(toBN(estimatedGasCosts), 'ether')
       const formattedGasCosts = formatAmount(gasCostsAsEth)
       if (isCurrent) {

src/routes/safe/components/Settings/ThresholdSettings/ChangeThreshold/index.jsx

@@ -21,7 +21,7 @@ import type { Owner } from '~/routes/safe/store/models/owner'
 import { getWeb3 } from '~/logic/wallets/getWeb3'
 import { formatAmount } from '~/logic/tokens/utils/formatAmount'
 import { getGnosisSafeInstanceAt } from '~/logic/contracts/safeContracts'
-import { estimateApprovalTxGasCosts } from '~/logic/safe/transactions/gasNew'
+import { estimateTxGasCosts } from '~/logic/safe/transactions/gasNew'
 import { styles } from './style'
 
 type Props = {
@@ -48,7 +48,7 @@ const ChangeThreshold = ({
 
       const safeInstance = await getGnosisSafeInstanceAt(safeAddress)
       const txData = safeInstance.contract.methods.changeThreshold('1').encodeABI()
-      const estimatedGasCosts = await estimateApprovalTxGasCosts(safeAddress, safeAddress, txData)
+      const estimatedGasCosts = await estimateTxGasCosts(safeAddress, safeAddress, txData)
       const gasCostsAsEth = fromWei(toBN(estimatedGasCosts), 'ether')
       const formattedGasCosts = formatAmount(gasCostsAsEth)
       if (isCurrent) {