Support for Layer 2 networks with transaction fees on both layers (#12658)

* Support for Layer 2 networks with transaction fees on both layers * Use variable name in transaction-breakdown * Add comment on code source to ui/helpers/utils/optimism/fetchEstimatedL1Fee.js * Fix unit tests * Ensure values passed to are defined * Fix activity log
3 years ago · 9fa15dda6f
parent 0a8f94af81
commit 9fa15dda6f
22 changed files with 1153 additions and 79 deletions
--- a/app/_locales/en/messages.json
+++ b/app/_locales/en/messages.json
@ -1265,6 +1265,9 @@
  "lastConnected": {
    "message": "Last Connected"
  },
+  "layer1Fees": {
+    "message": "Layer 1 fees"
+  },
  "learnMore": {
    "message": "Learn more"
  },
@ -2825,6 +2828,12 @@
  "transactionDetailGasTotalSubtitle": {
    "message": "Amount + gas fee"
  },
+  "transactionDetailLayer2GasHeading": {
+    "message": "Layer 2 gas fee"
+  },
+  "transactionDetailMultiLayerTotalSubtitle": {
+    "message": "Amount + fees"
+  },
  "transactionDropped": {
    "message": "Transaction dropped at $2."
  },
@ -2843,6 +2852,15 @@
  "transactionHistoryBaseFee": {
    "message": "Base Fee (GWEI)"
  },
+  "transactionHistoryL1GasLabel": {
+    "message": "Total L1 gas fee"
+  },
+  "transactionHistoryL2GasLimitLabel": {
+    "message": "L2 gas limit`"
+  },
+  "transactionHistoryL2GasPriceLabel": {
+    "message": "L2 gas price`"
+  },
  "transactionHistoryMaxFeePerGas": {
    "message": "Max Fee Per Gas"
  },
--- a/lavamoat/browserify/policy.json
+++ b/lavamoat/browserify/policy.json
@ -84,6 +84,12 @@
        "multihashes": true
      }
    },
+    "@eth-optimism/contracts": {
+      "packages": {
+        "@ethersproject/abstract-provider": true,
+        "ethers": true
+      }
+    },
    "@ethereumjs/common": {
      "packages": {
        "buffer": true,
@ -319,6 +325,7 @@
        "@ethersproject/bignumber": true,
        "@ethersproject/bytes": true,
        "@ethersproject/keccak256": true,
+        "@ethersproject/logger": true,
        "@ethersproject/sha2": true,
        "@ethersproject/strings": true
      }
--- a/package.json
+++ b/package.json
@ -98,6 +98,7 @@
    "@babel/runtime": "^7.5.5",
    "@download/blockies": "^1.0.3",
    "@ensdomains/content-hash": "^2.5.6",
+    "@eth-optimism/contracts": "0.0.0-2021919175625",
    "@ethereumjs/common": "^2.3.1",
    "@ethereumjs/tx": "^3.2.1",
    "@formatjs/intl-relativetimeformat": "^5.2.6",
@ -367,7 +368,9 @@
      "github:assemblyscript/assemblyscript": false,
      "tiny-secp256k1": false,
      "@lavamoat/preinstall-always-fail": false,
-      "fsevents": false
+      "fsevents": false,
+      "node-hid": false,
+      "usb": false
    }
  }
 }
--- a/shared/modules/conversion.utils.js
+++ b/shared/modules/conversion.utils.js
@ -289,4 +289,6 @@ export {
  toNegative,
  subtractCurrencies,
  decGWEIToHexWEI,
+  toBigNumber,
+  toNormalizedDenomination,
 };
--- a/ui/components/app/advanced-gas-controls/advanced-gas-controls.component.js
+++ b/ui/components/app/advanced-gas-controls/advanced-gas-controls.component.js
@ -7,6 +7,7 @@ import FormField from '../../ui/form-field';
 import { GAS_ESTIMATE_TYPES } from '../../../../shared/constants/gas';
 import { getGasFormErrorText } from '../../../helpers/constants/gas';
 import { getIsGasEstimatesLoading } from '../../../ducks/metamask/metamask';
+import { getNetworkSupportsSettingGasPrice } from '../../../selectors/selectors';

 export default function AdvancedGasControls({
  gasEstimateType,
@ -34,6 +35,10 @@ export default function AdvancedGasControls({
      gasEstimateType === GAS_ESTIMATE_TYPES.ETH_GASPRICE ||
      isGasEstimatesLoading);

+  const networkSupportsSettingGasPrice = useSelector(
+    getNetworkSupportsSettingGasPrice,
+  );
+
  return (
    <div className="advanced-gas-controls">
      <FormField
@ -106,6 +111,7 @@ export default function AdvancedGasControls({
                ? getGasFormErrorText(gasErrors.gasPrice, t)
                : null
            }
+            disabled={!networkSupportsSettingGasPrice}
          />
        </>
      )}
--- a/ui/components/app/advanced-gas-controls/advanced-gas-controls.test.js
+++ b/ui/components/app/advanced-gas-controls/advanced-gas-controls.test.js
@ -7,7 +7,9 @@ import { renderWithProvider } from '../../../../test/jest/rendering';
 import AdvancedGasControls from './advanced-gas-controls.component';

 const renderComponent = (props) => {
-  const store = configureMockStore([])({ metamask: { identities: [] } });
+  const store = configureMockStore([])({
+    metamask: { identities: [], provider: {} },
+  });
  return renderWithProvider(<AdvancedGasControls {...props} />, store);
 };

--- a/ui/components/app/gas-customization/advanced-gas-inputs/advanced-gas-inputs.component.js
+++ b/ui/components/app/gas-customization/advanced-gas-inputs/advanced-gas-inputs.component.js
@ -20,10 +20,12 @@ export default class AdvancedGasInputs extends Component {
    customGasLimitMessage: PropTypes.string,
    minimumGasLimit: PropTypes.number,
    customPriceIsExcessive: PropTypes.bool,
+    networkSupportsSettingGasPrice: PropTypes.bool,
  };

  static defaultProps = {
    customPriceIsExcessive: false,
+    networkSupportsSettingGasPrice: true,
  };

  constructor(props) {
@ -131,6 +133,7 @@ export default class AdvancedGasInputs extends Component {
    testId,
    customMessageComponent,
    tooltipTitle,
+    disabled,
  }) {
    return (
      <div className="advanced-gas-inputs__gas-edit-row">
@ -152,6 +155,7 @@ export default class AdvancedGasInputs extends Component {
            min="0"
            value={value}
            onChange={onChange}
+            disabled={disabled}
            data-testid={testId}
          />
          <div
@ -162,18 +166,22 @@ export default class AdvancedGasInputs extends Component {
                  errorType === 'error',
                'advanced-gas-inputs__gas-edit-row__input--warning':
                  errorType === 'warning',
+                'advanced-gas-inputs__gas-edit-row__input-arrows--hidden': disabled,
              },
            )}
          >
            <div
              className="advanced-gas-inputs__gas-edit-row__input-arrows__i-wrap"
-              onClick={() => onChange({ target: { value: value + 1 } })}
+              onClick={() =>
+                !disabled && onChange({ target: { value: value + 1 } })
+              }
            >
              <i className="fa fa-sm fa-angle-up" />
            </div>
            <div
              className="advanced-gas-inputs__gas-edit-row__input-arrows__i-wrap"
              onClick={() =>
+                !disabled &&
                onChange({ target: { value: Math.max(value - 1, 0) } })
              }
            >
@ -194,6 +202,7 @@ export default class AdvancedGasInputs extends Component {
      customGasLimitMessage,
      minimumGasLimit,
      customPriceIsExcessive,
+      networkSupportsSettingGasPrice,
    } = this.props;
    const { gasPrice, gasLimit } = this.state;

@ -243,6 +252,7 @@ export default class AdvancedGasInputs extends Component {
          onChange: this.onChangeGasPrice,
          errorComponent: gasPriceErrorComponent,
          errorType: gasPriceErrorType,
+          disabled: !networkSupportsSettingGasPrice,
        })}
        {this.renderGasInput({
          label: this.context.t('gasLimit'),
--- a/ui/components/app/gas-customization/advanced-gas-inputs/advanced-gas-inputs.container.js
+++ b/ui/components/app/gas-customization/advanced-gas-inputs/advanced-gas-inputs.container.js
@ -4,6 +4,7 @@ import {
  decimalToHex,
  hexWEIToDecGWEI,
 } from '../../../../helpers/utils/conversions.util';
+import { getNetworkSupportsSettingGasPrice } from '../../../../selectors/selectors';
 import { MIN_GAS_LIMIT_DEC } from '../../../../pages/send/send.constants';
 import AdvancedGasInputs from './advanced-gas-inputs.component';

@ -19,7 +20,13 @@ function convertMinimumGasLimitForInputs(minimumGasLimit = MIN_GAS_LIMIT_DEC) {
  return parseInt(minimumGasLimit, 10);
 }

-const mergeProps = (stateProps, dispatchProps, ownProps) => {
+function mapStateToProps(state) {
+  return {
+    networkSupportsSettingGasPrice: getNetworkSupportsSettingGasPrice(state),
+  };
+}
+
+function mergeProps(stateProps, dispatchProps, ownProps) {
  const {
    customGasPrice,
    customGasLimit,
@ -38,6 +45,6 @@ const mergeProps = (stateProps, dispatchProps, ownProps) => {
      updateCustomGasPrice(decGWEIToHexWEI(price)),
    updateCustomGasLimit: (limit) => updateCustomGasLimit(decimalToHex(limit)),
  };
-};
+}

-export default connect(null, null, mergeProps)(AdvancedGasInputs);
+export default connect(mapStateToProps, null, mergeProps)(AdvancedGasInputs);
--- a/ui/components/app/gas-customization/advanced-gas-inputs/advanced-gas-inputs.test.js
+++ b/ui/components/app/gas-customization/advanced-gas-inputs/advanced-gas-inputs.test.js
@ -20,7 +20,7 @@ describe('AdvancedGasInputs', () => {
    minimumGasLimit: 21000,
  };

-  const store = configureStore({});
+  const store = configureStore({ metamask: { provider: {} } });

  beforeEach(() => {
    clock = sinon.useFakeTimers();
--- a/ui/components/app/gas-customization/advanced-gas-inputs/index.scss
+++ b/ui/components/app/gas-customization/advanced-gas-inputs/index.scss
@ -109,6 +109,10 @@
      i {
        font-size: $font-size-h8;
      }
+
+      &--hidden {
+        display: none;
+      }
    }

    &__input-arrows--error {
--- a/ui/components/app/multilayer-fee-message/index.js
+++ b/ui/components/app/multilayer-fee-message/index.js
@ -0,0 +1 @@
+export { default } from './multi-layer-fee-message';
--- a/ui/components/app/multilayer-fee-message/multi-layer-fee-message.js
+++ b/ui/components/app/multilayer-fee-message/multi-layer-fee-message.js
@ -0,0 +1,70 @@
+import React, { useContext, useState, useEffect } from 'react';
+import PropTypes from 'prop-types';
+import { captureException } from '@sentry/browser';
+import TransactionDetailItem from '../transaction-detail-item/transaction-detail-item.component';
+import fetchEstimatedL1Fee from '../../../helpers/utils/optimism/fetchEstimatedL1Fee';
+import { I18nContext } from '../../../contexts/i18n';
+import { sumHexes } from '../../../helpers/utils/transactions.util';
+import {
+  toBigNumber,
+  toNormalizedDenomination,
+} from '../../../../shared/modules/conversion.utils';
+
+export default function MultilayerFeeMessage({ transaction, layer2fee }) {
+  const t = useContext(I18nContext);
+
+  const [fetchedLayer1Total, setLayer1Total] = useState(null);
+
+  let layer1Total = 'unknown';
+
+  if (fetchedLayer1Total !== null) {
+    const layer1TotalBN = toBigNumber.hex(fetchedLayer1Total);
+    layer1Total = `${toNormalizedDenomination
+      .WEI(layer1TotalBN)
+      .toString(10)} ETH`;
+  }
+
+  const totalInWeiHex = sumHexes(
+    layer2fee || '0x0',
+    fetchedLayer1Total || '0x0',
+    transaction.txParams.value || '0x0',
+  );
+  const totalBN = toBigNumber.hex(totalInWeiHex);
+  const totalInEth = `${toNormalizedDenomination
+    .WEI(totalBN)
+    .toString(10)} ETH`;
+
+  useEffect(() => {
+    const getEstimatedL1Fee = async () => {
+      try {
+        const result = await fetchEstimatedL1Fee(global.eth, transaction);
+        setLayer1Total(result);
+      } catch (e) {
+        captureException(e);
+        setLayer1Total(null);
+      }
+    };
+    getEstimatedL1Fee();
+  }, [transaction]);
+
+  return (
+    <>
+      <TransactionDetailItem
+        key="total-item"
+        detailTitle={t('layer1Fees')}
+        detailTotal={layer1Total}
+      />
+      <TransactionDetailItem
+        key="total-item"
+        detailTitle={t('total')}
+        detailTotal={totalInEth}
+        subTitle={t('transactionDetailMultiLayerTotalSubtitle')}
+      />
+    </>
+  );
+}
+
+MultilayerFeeMessage.propTypes = {
+  transaction: PropTypes.object,
+  layer2fee: PropTypes.string,
+};
--- a/ui/components/app/transaction-activity-log/transaction-activity-log.util.js
+++ b/ui/components/app/transaction-activity-log/transaction-activity-log.util.js
@ -89,7 +89,7 @@ export function getActivities(transaction, isFirstTransaction = false) {
      // need to cache these values because the status update history events don't provide us with
      // the latest gas limit and gas price.
      cachedGasLimit = gas;
-      cachedGasPrice = eip1559Price || gasPrice || '0x0';
+      cachedGasPrice = eip1559Price || gasPrice || paramsGasPrice || '0x0';

      if (isFirstTransaction) {
        return acc.concat({
--- a/ui/components/app/transaction-breakdown/transaction-breakdown.component.js
+++ b/ui/components/app/transaction-breakdown/transaction-breakdown.component.js
@ -33,6 +33,8 @@ export default class TransactionBreakdown extends PureComponent {
    priorityFee: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
    hexGasTotal: PropTypes.string,
    isEIP1559Transaction: PropTypes.bool,
+    isMultiLayerFeeNetwork: PropTypes.bool,
+    l1HexGasTotal: PropTypes.string,
  };

  static defaultProps = {
@ -57,6 +59,8 @@ export default class TransactionBreakdown extends PureComponent {
      priorityFee,
      hexGasTotal,
      isEIP1559Transaction,
+      isMultiLayerFeeNetwork,
+      l1HexGasTotal,
    } = this.props;
    return (
      <div className={classnames('transaction-breakdown', className)}>
@ -77,7 +81,11 @@ export default class TransactionBreakdown extends PureComponent {
          </span>
        </TransactionBreakdownRow>
        <TransactionBreakdownRow
-          title={`${t('gasLimit')} (${t('units')})`}
+          title={
+            isMultiLayerFeeNetwork
+              ? t('transactionHistoryL2GasLimitLabel')
+              : `${t('gasLimit')} (${t('units')})`
+          }
          className="transaction-breakdown__row-title"
        >
          {typeof gas === 'undefined' ? (
@ -127,7 +135,13 @@ export default class TransactionBreakdown extends PureComponent {
          </TransactionBreakdownRow>
        ) : null}
        {!isEIP1559Transaction && (
-          <TransactionBreakdownRow title={t('advancedGasPriceTitle')}>
+          <TransactionBreakdownRow
+            title={
+              isMultiLayerFeeNetwork
+                ? t('transactionHistoryL2GasPriceLabel')
+                : t('advancedGasPriceTitle')
+            }
+          >
            {typeof gasPrice === 'undefined' ? (
              '?'
            ) : (
@ -182,11 +196,30 @@ export default class TransactionBreakdown extends PureComponent {
            )}
          </TransactionBreakdownRow>
        )}
+        {isMultiLayerFeeNetwork && (
+          <TransactionBreakdownRow title={t('transactionHistoryL1GasLabel')}>
+            <UserPreferencedCurrencyDisplay
+              className="transaction-breakdown__value"
+              data-testid="transaction-breakdown__l1-gas-total"
+              numberOfDecimals={18}
+              value={l1HexGasTotal}
+              type={PRIMARY}
+            />
+            {showFiat && (
+              <UserPreferencedCurrencyDisplay
+                className="transaction-breakdown__value"
+                type={SECONDARY}
+                value={l1HexGasTotal}
+              />
+            )}
+          </TransactionBreakdownRow>
+        )}
        <TransactionBreakdownRow title={t('total')}>
          <UserPreferencedCurrencyDisplay
            className="transaction-breakdown__value transaction-breakdown__value--eth-total"
            type={PRIMARY}
            value={totalInHex}
+            numberOfDecimals={isMultiLayerFeeNetwork ? 18 : null}
          />
          {showFiat && (
            <UserPreferencedCurrencyDisplay
--- a/ui/components/app/transaction-breakdown/transaction-breakdown.container.js
+++ b/ui/components/app/transaction-breakdown/transaction-breakdown.container.js
@ -1,17 +1,21 @@
 import { connect } from 'react-redux';
-import { getShouldShowFiat } from '../../../selectors';
+import {
+  getShouldShowFiat,
+  getIsMultiLayerFeeNetwork,
+} from '../../../selectors';
 import { getNativeCurrency } from '../../../ducks/metamask/metamask';
 import { getHexGasTotal } from '../../../helpers/utils/confirm-tx.util';
 import { subtractHexes } from '../../../helpers/utils/conversions.util';
 import { sumHexes } from '../../../helpers/utils/transactions.util';
 import { isEIP1559Transaction } from '../../../../shared/modules/transaction.utils';
+
 import TransactionBreakdown from './transaction-breakdown.component';

 const mapStateToProps = (state, ownProps) => {
  const { transaction, isTokenApprove } = ownProps;
  const {
    txParams: { gas, gasPrice, maxFeePerGas, value } = {},
-    txReceipt: { gasUsed, effectiveGasPrice } = {},
+    txReceipt: { gasUsed, effectiveGasPrice, l1Fee: l1HexGasTotal } = {},
    baseFeePerGas,
  } = transaction;

@ -33,7 +37,15 @@ const mapStateToProps = (state, ownProps) => {
      usedGasPrice &&
      getHexGasTotal({ gasLimit, gasPrice: usedGasPrice })) ||
    '0x0';
-  const totalInHex = sumHexes(hexGasTotal, value);
+
+  let totalInHex = sumHexes(hexGasTotal, value);
+
+  const isMultiLayerFeeNetwork =
+    getIsMultiLayerFeeNetwork(state) && l1HexGasTotal !== undefined;
+
+  if (isMultiLayerFeeNetwork) {
+    totalInHex = sumHexes(totalInHex, l1HexGasTotal);
+  }

  return {
    nativeCurrency: getNativeCurrency(state),
@ -48,6 +60,8 @@ const mapStateToProps = (state, ownProps) => {
    priorityFee,
    baseFee: baseFeePerGas,
    isEIP1559Transaction: isEIP1559Transaction(transaction),
+    isMultiLayerFeeNetwork,
+    l1HexGasTotal,
  };
 };

--- a/ui/helpers/utils/optimism/buildUnserializedTransaction.js
+++ b/ui/helpers/utils/optimism/buildUnserializedTransaction.js
@ -0,0 +1,33 @@
+import { omit } from 'lodash';
+import { BN, stripHexPrefix } from 'ethereumjs-util';
+import Common, { Chain, Hardfork } from '@ethereumjs/common';
+import { TransactionFactory } from '@ethereumjs/tx';
+
+function buildTxParams(txMeta) {
+  return {
+    ...omit(txMeta.txParams, 'gas'),
+    gasLimit: txMeta.txParams.gas,
+  };
+}
+
+function buildTransactionCommon(txMeta) {
+  // This produces a transaction whose information does not completely match an
+  // Optimism transaction — for instance, DEFAULT_CHAIN is still 'mainnet' and
+  // genesis points to the mainnet genesis, not the Optimism genesis — but
+  // considering that all we want to do is serialize a transaction, this works
+  // fine for our use case.
+  return Common.forCustomChain(Chain.Mainnet, {
+    chainId: new BN(stripHexPrefix(txMeta.chainId), 16),
+    networkId: new BN(txMeta.metamaskNetworkId, 10),
+    // Optimism only supports type-0 transactions; it does not support any of
+    // the newer EIPs since EIP-155. Source:
+    // <https://github.com/ethereum-optimism/optimism/blob/develop/specs/l2geth/transaction-types.md>
+    defaultHardfork: Hardfork.SpuriousDragon,
+  });
+}
+
+export default function buildUnserializedTransaction(txMeta) {
+  const txParams = buildTxParams(txMeta);
+  const common = buildTransactionCommon(txMeta);
+  return TransactionFactory.fromTxData(txParams, { common });
+}
--- a/ui/helpers/utils/optimism/buildUnserializedTransaction.test.js
+++ b/ui/helpers/utils/optimism/buildUnserializedTransaction.test.js
@ -0,0 +1,28 @@
+import { BN } from 'ethereumjs-util';
+import { times } from 'lodash';
+import buildUnserializedTransaction from './buildUnserializedTransaction';
+
+describe('buildUnserializedTransaction', () => {
+  it('returns a transaction that can be serialized and fed to an Optimism smart contract', () => {
+    const unserializedTransaction = buildUnserializedTransaction({
+      txParams: {
+        nonce: '0x0',
+        gasPrice: `0x${new BN('100').toString(16)}`,
+        gas: `0x${new BN('21000').toString(16)}`,
+        to: '0x0000000000000000000000000000000000000000',
+        value: `0x${new BN('10000000000000').toString(16)}`,
+        data: '0x0',
+      },
+    });
+    expect(unserializedTransaction).toMatchObject({
+      nonce: new BN('00', 16),
+      gasPrice: new BN('64', 16),
+      gasLimit: new BN('5208', 16),
+      to: expect.objectContaining({
+        buf: Buffer.from(times(20, 0)),
+      }),
+      value: new BN('09184e72a000', 16),
+      data: Buffer.from([0]),
+    });
+  });
+});
--- a/ui/helpers/utils/optimism/fetchEstimatedL1Fee.js
+++ b/ui/helpers/utils/optimism/fetchEstimatedL1Fee.js
@ -0,0 +1,24 @@
+import * as ethers from 'ethers';
+import * as optimismContracts from '@eth-optimism/contracts';
+import buildUnserializedTransaction from './buildUnserializedTransaction';
+
+// The code in this file is largely drawn from https://community.optimism.io/docs/developers/l2/new-fees.html#for-frontend-and-wallet-developers
+
+function buildOVMGasPriceOracleContract(eth) {
+  const OVMGasPriceOracle = optimismContracts
+    .getContractFactory('OVM_GasPriceOracle')
+    .attach(optimismContracts.predeploys.OVM_GasPriceOracle);
+  const abi = JSON.parse(
+    OVMGasPriceOracle.interface.format(ethers.utils.FormatTypes.json),
+  );
+  return eth.contract(abi).at(OVMGasPriceOracle.address);
+}
+
+export default async function fetchEstimatedL1Fee(eth, txMeta) {
+  const contract = buildOVMGasPriceOracleContract(eth);
+  const serializedTransaction = buildUnserializedTransaction(
+    txMeta,
+  ).serialize();
+  const result = await contract.getL1Fee(serializedTransaction);
+  return result?.[0]?.toString(16);
+}
--- a/ui/pages/confirm-transaction-base/confirm-transaction-base.component.js
+++ b/ui/pages/confirm-transaction-base/confirm-transaction-base.component.js
@ -36,6 +36,7 @@ import InfoTooltip from '../../components/ui/info-tooltip/info-tooltip';
 import LoadingHeartBeat from '../../components/ui/loading-heartbeat';
 import GasTiming from '../../components/app/gas-timing/gas-timing.component';
 import LedgerInstructionField from '../../components/app/ledger-instruction-field';
+import MultiLayerFeeMessage from '../../components/app/multilayer-fee-message';

 import {
  COLORS,
@ -134,6 +135,7 @@ export default class ConfirmTransactionBase extends Component {
    nativeCurrency: PropTypes.string,
    supportsEIP1559: PropTypes.bool,
    hardwareWalletRequiresConnection: PropTypes.bool,
+    isMultiLayerFeeNetwork: PropTypes.bool,
  };

  state = {
@ -315,6 +317,7 @@ export default class ConfirmTransactionBase extends Component {
      isMainnet,
      showLedgerSteps,
      supportsEIP1559,
+      isMultiLayerFeeNetwork,
    } = this.props;
    const { t } = this.context;

@ -433,7 +436,9 @@ export default class ConfirmTransactionBase extends Component {
                detailTitle={
                  txData.dappSuggestedGasFees ? (
                    <>
-                      {t('transactionDetailGasHeading')}
+                      {isMultiLayerFeeNetwork
+                        ? t('transactionDetailLayer2GasHeading')
+                        : t('transactionDetailGasHeading')}
                      <InfoTooltip
                        contentText={t('transactionDetailDappGasTooltip')}
                        position="top"
@ -443,7 +448,9 @@ export default class ConfirmTransactionBase extends Component {
                    </>
                  ) : (
                    <>
-                      {t('transactionDetailGasHeading')}
+                      {isMultiLayerFeeNetwork
+                        ? t('transactionDetailLayer2GasHeading')
+                        : t('transactionDetailGasHeading')}
                      <InfoTooltip
                        contentText={
                          <>
@ -473,14 +480,16 @@ export default class ConfirmTransactionBase extends Component {
                }
                detailTitleColor={COLORS.BLACK}
                detailText={
-                  <div className="confirm-page-container-content__currency-container">
-                    {renderHeartBeatIfNotInTest()}
-                    <UserPreferencedCurrencyDisplay
-                      type={SECONDARY}
-                      value={hexMinimumTransactionFee}
-                      hideLabel={Boolean(useNativeCurrencyAsPrimaryCurrency)}
-                    />
-                  </div>
+                  !isMultiLayerFeeNetwork && (
+                    <div className="confirm-page-container-content__currency-container">
+                      {renderHeartBeatIfNotInTest()}
+                      <UserPreferencedCurrencyDisplay
+                        type={SECONDARY}
+                        value={hexMinimumTransactionFee}
+                        hideLabel={Boolean(useNativeCurrencyAsPrimaryCurrency)}
+                      />
+                    </div>
+                  )
                }
                detailTotal={
                  <div className="confirm-page-container-content__currency-container">
@ -489,26 +498,30 @@ export default class ConfirmTransactionBase extends Component {
                      type={PRIMARY}
                      value={hexMinimumTransactionFee}
                      hideLabel={!useNativeCurrencyAsPrimaryCurrency}
+                      numberOfDecimals={isMultiLayerFeeNetwork ? 18 : 6}
                    />
                  </div>
                }
-                subText={t('editGasSubTextFee', [
-                  <b key="editGasSubTextFeeLabel">
-                    {t('editGasSubTextFeeLabel')}
-                  </b>,
-                  <div
-                    key="editGasSubTextFeeValue"
-                    className="confirm-page-container-content__currency-container"
-                  >
-                    {renderHeartBeatIfNotInTest()}
-                    <UserPreferencedCurrencyDisplay
-                      key="editGasSubTextFeeAmount"
-                      type={PRIMARY}
-                      value={hexMaximumTransactionFee}
-                      hideLabel={!useNativeCurrencyAsPrimaryCurrency}
-                    />
-                  </div>,
-                ])}
+                subText={
+                  !isMultiLayerFeeNetwork &&
+                  t('editGasSubTextFee', [
+                    <b key="editGasSubTextFeeLabel">
+                      {t('editGasSubTextFeeLabel')}
+                    </b>,
+                    <div
+                      key="editGasSubTextFeeValue"
+                      className="confirm-page-container-content__currency-container"
+                    >
+                      {renderHeartBeatIfNotInTest()}
+                      <UserPreferencedCurrencyDisplay
+                        key="editGasSubTextFeeAmount"
+                        type={PRIMARY}
+                        value={hexMaximumTransactionFee}
+                        hideLabel={!useNativeCurrencyAsPrimaryCurrency}
+                      />
+                    </div>,
+                  ])
+                }
                subTitle={
                  <>
                    {txData.dappSuggestedGasFees ? (
@ -537,19 +550,27 @@ export default class ConfirmTransactionBase extends Component {
                }
              />
            ),
-            <TransactionDetailItem
-              key="total-item"
-              detailTitle={t('total')}
-              detailText={renderTotalDetailText()}
-              detailTotal={renderTotalDetailTotal()}
-              subTitle={t('transactionDetailGasTotalSubtitle')}
-              subText={t('editGasSubTextAmount', [
-                <b key="editGasSubTextAmountLabel">
-                  {t('editGasSubTextAmountLabel')}
-                </b>,
-                renderTotalMaxAmount(),
-              ])}
-            />,
+            isMultiLayerFeeNetwork && (
+              <MultiLayerFeeMessage
+                transaction={txData}
+                layer2fee={hexMinimumTransactionFee}
+              />
+            ),
+            !isMultiLayerFeeNetwork && (
+              <TransactionDetailItem
+                key="total-item"
+                detailTitle={t('total')}
+                detailText={renderTotalDetailText()}
+                detailTotal={renderTotalDetailTotal()}
+                subTitle={t('transactionDetailGasTotalSubtitle')}
+                subText={t('editGasSubTextAmount', [
+                  <b key="editGasSubTextAmountLabel">
+                    {t('editGasSubTextAmountLabel')}
+                  </b>,
+                  renderTotalMaxAmount(),
+                ])}
+              />
+            ),
          ]}
        />
        {nonceField}
--- a/ui/pages/confirm-transaction-base/confirm-transaction-base.container.js
+++ b/ui/pages/confirm-transaction-base/confirm-transaction-base.container.js
@ -31,6 +31,7 @@ import {
  doesAddressRequireLedgerHidConnection,
  getUseTokenDetection,
  getTokenList,
+  getIsMultiLayerFeeNetwork,
 } from '../../selectors';
 import { getMostRecentOverviewPage } from '../../ducks/history/history';
 import {
@ -179,6 +180,8 @@ const mapStateToProps = (state, ownProps) => {
    fromAddress,
  );

+  const isMultiLayerFeeNetwork = getIsMultiLayerFeeNetwork(state);
+
  return {
    balance,
    fromAddress,
@ -227,6 +230,7 @@ const mapStateToProps = (state, ownProps) => {
    showLedgerSteps: fromAddressIsLedger,
    nativeCurrency,
    hardwareWalletRequiresConnection,
+    isMultiLayerFeeNetwork,
  };
 };

--- a/ui/selectors/selectors.js
+++ b/ui/selectors/selectors.js
@ -5,6 +5,8 @@ import {
  TEST_CHAINS,
  NETWORK_TYPE_RPC,
  NATIVE_CURRENCY_TOKEN_IMAGE_MAP,
+  OPTIMISM_CHAIN_ID,
+  OPTIMISM_TESTNET_CHAIN_ID,
 } from '../../shared/constants/network';
 import {
  KEYRING_TYPES,
@ -701,3 +703,18 @@ export function getProvider(state) {
 export function getFrequentRpcListDetail(state) {
  return state.metamask.frequentRpcListDetail;
 }
+
+export function getIsOptimism(state) {
+  return (
+    getCurrentChainId(state) === OPTIMISM_CHAIN_ID ||
+    getCurrentChainId(state) === OPTIMISM_TESTNET_CHAIN_ID
+  );
+}
+
+export function getNetworkSupportsSettingGasPrice(state) {
+  return !getIsOptimism(state);
+}
+
+export function getIsMultiLayerFeeNetwork(state) {
+  return getIsOptimism(state);
+}
--- a/yarn.lock
+++ b/yarn.lock
				`@ -0,0 +1 @@`
				`export { default } from './multi-layer-fee-message';`