diff --git a/.github/workflows/vercel.yml b/.github/workflows/vercel.yml
index 8bc79003ae..ba8a657979 100644
--- a/.github/workflows/vercel.yml
+++ b/.github/workflows/vercel.yml
@@ -47,12 +47,14 @@ jobs:
           REACT_APP_NETWORK_URL_1=${{ secrets.REACT_APP_NETWORK_URL_1 }}
           REACT_APP_NETWORK_URL_100=${{ secrets.REACT_APP_NETWORK_URL_100 }}
           REACT_APP_NETWORK_URL_42161=${{ secrets.REACT_APP_NETWORK_URL_42161 }}
+          REACT_APP_NETWORK_URL_8453=${{ secrets.REACT_APP_NETWORK_URL_8453 }}
           REACT_APP_NETWORK_URL_11155111=${{ secrets.REACT_APP_NETWORK_URL_11155111 }}
           REACT_APP_WC_PROJECT_ID=${{ secrets.REACT_APP_WC_PROJECT_ID }}
           REACT_APP_IPFS_READ_URI=${{ secrets.REACT_APP_IPFS_READ_URI }}
           REACT_APP_EXPLORER_SENTRY_DSN=${{ secrets.EXPLORER_SENTRY_DSN }}
           REACT_APP_SUBGRAPH_URL_MAINNET=${{ secrets.REACT_APP_SUBGRAPH_URL_MAINNET }}
           REACT_APP_SUBGRAPH_URL_ARBITRUM_ONE=${{ secrets.REACT_APP_SUBGRAPH_URL_ARBITRUM_ONE }}
+          REACT_APP_SUBGRAPH_URL_BASE=${{ secrets.REACT_APP_SUBGRAPH_URL_BASE }}
           REACT_APP_SUBGRAPH_URL_GNOSIS_CHAIN=${{ secrets.REACT_APP_SUBGRAPH_URL_GNOSIS_CHAIN }}
           REACT_APP_BFF_BASE_URL=${{ secrets.BFF_BASE_URL }}
           REACT_APP_CMS_BASE_URL=${{ secrets.CMS_BASE_URL }}
diff --git a/README.md b/README.md
index 9ed4392d7e..43094caf91 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@ yarn test
 
 # 🔎 Explorer
 
-Start the Explorer on http://localhost:4200
+Start the Explorer on <http://localhost:4200>
 
 [Read more about the Explorer](apps/explorer/README.md)
 
@@ -69,7 +69,7 @@ yarn build:explorer
 
 # 🐄 cow.fi
 
-Start CoW.fi on http://localhost:3001
+Start CoW.fi on <http://localhost:3001>
 
 ### Start
 
@@ -85,7 +85,7 @@ yarn build:cowfi
 
 # 🖼️ Widget Configurator
 
-Start the Widget Configurator on http://127.0.0.1:4200/widget-configurator
+Start the Widget Configurator on <http://127.0.0.1:4200/widget-configurator>
 
 ```bash
 # Start
@@ -97,7 +97,7 @@ yarn build:widget
 
 # 🌌 Cosmos UI Library
 
-Start the Cosmos UI Library on http://localhost:5000
+Start the Cosmos UI Library on <http://localhost:5000>
 
 ```bash
 yarn run cosmos
@@ -174,6 +174,7 @@ REACT_APP_NETWORK_URL_1: https://...
 REACT_APP_NETWORK_URL_11155111: https://...
 REACT_APP_NETWORK_URL_100: https://...
 REACT_APP_NETWORK_URL_42161: https://...
+REACT_APP_NETWORK_URL_8453: https://...
 ```
 
 Additionally, if you plan to run the integration tests locally you must define:
@@ -216,7 +217,6 @@ The API endpoint is configured using the environment variable
 REACT_APP_BFF_BASE_URL=https://bff.cow.fi
 ```
 
-
 ## CMS API Endpoints (Content Management System)
 
 The CMS API is a helper API that provides some additional content to the frontend.
@@ -235,10 +235,6 @@ The API endpoint is configured using the environment variable
 REACT_APP_CMS_BASE_URL=https://cms.cow.fi/api
 ```
 
-
-
-
-
 ## Price feeds
 
 CoW Swap tries to find the best price available on-chain using some price feeds.
@@ -295,4 +291,3 @@ In case of problems with the service worker cache you force a reset using
 1. [Oveall Architecture](docs/architecture-overview.md)
 2. [Amounts formatting](apps/cowswap-frontend/src/utils/amountFormat/README.md)
 3. [ABIs](libs/abis/README.md)
-
diff --git a/apps/cowswap-frontend/src/common/pure/ApproveButton/index.cosmos.tsx b/apps/cowswap-frontend/src/common/pure/ApproveButton/index.cosmos.tsx
index 94f6a8d854..e4b45b02bb 100644
--- a/apps/cowswap-frontend/src/common/pure/ApproveButton/index.cosmos.tsx
+++ b/apps/cowswap-frontend/src/common/pure/ApproveButton/index.cosmos.tsx
@@ -1,4 +1,4 @@
-import { COW, GNO } from '@cowprotocol/common-const'
+import { COW, GNO_MAINNET } from '@cowprotocol/common-const'
 import { SupportedChainId } from '@cowprotocol/cow-sdk'
 
 import { DemoContainer } from 'cosmos.decorator'
@@ -9,7 +9,7 @@ import { ApprovalState } from '../../hooks/useApproveState'
 import { ApproveButton } from '.'
 
 const COW_TOKEN = COW[SupportedChainId.MAINNET]
-const GNO_TOKEN = GNO[SupportedChainId.MAINNET]
+const GNO_TOKEN = GNO_MAINNET
 
 const Custom = () => {
   const [currencyRaw] = useSelect('currency', {
diff --git a/apps/cowswap-frontend/src/common/pure/CurrencySelectButton/index.cosmos.tsx b/apps/cowswap-frontend/src/common/pure/CurrencySelectButton/index.cosmos.tsx
index 738139d32a..757a002e1c 100644
--- a/apps/cowswap-frontend/src/common/pure/CurrencySelectButton/index.cosmos.tsx
+++ b/apps/cowswap-frontend/src/common/pure/CurrencySelectButton/index.cosmos.tsx
@@ -1,4 +1,4 @@
-import { COW, GNO } from '@cowprotocol/common-const'
+import { COW, GNO_MAINNET } from '@cowprotocol/common-const'
 import { SupportedChainId } from '@cowprotocol/cow-sdk'
 
 import { useSelect } from 'react-cosmos/client'
@@ -6,7 +6,7 @@ import { useSelect } from 'react-cosmos/client'
 import { CurrencySelectButton, CurrencySelectButtonProps } from 'common/pure/CurrencySelectButton/index'
 
 const COW_TOKEN = COW[SupportedChainId.MAINNET]
-const GNO_TOKEN = GNO[SupportedChainId.MAINNET]
+const GNO_TOKEN = GNO_MAINNET
 
 function useCustomProps(): CurrencySelectButtonProps {
   const [currencyRaw] = useSelect('currency', {
diff --git a/apps/cowswap-frontend/src/common/pure/OrderProgressBarV2/index.tsx b/apps/cowswap-frontend/src/common/pure/OrderProgressBarV2/index.tsx
index 985c97a570..d55de0fc5c 100644
--- a/apps/cowswap-frontend/src/common/pure/OrderProgressBarV2/index.tsx
+++ b/apps/cowswap-frontend/src/common/pure/OrderProgressBarV2/index.tsx
@@ -649,14 +649,15 @@ const COW_SWAP_BENEFITS = [
   "Unlike most other exchanges, CoW Swap doesn't charge you any fees if your trade fails.",
 ]
 
-const TRADE_ON_ARBITRUM_BENEFIT =
-  'CoW Swap is now live on Arbitrum. Switch the network toggle in the nav bar for quick, cheap transactions.'
+const TRADE_ON_NEW_CHAINS_BENEFIT =
+  'CoW Swap is now live on Arbitrum and Base. Switch the network toggle in the nav bar for quick, cheap transactions.'
 
 const CHAIN_SPECIFIC_BENEFITS: Record<SupportedChainId, string[]> = {
-  [SupportedChainId.MAINNET]: [TRADE_ON_ARBITRUM_BENEFIT, ...COW_SWAP_BENEFITS],
+  [SupportedChainId.MAINNET]: [TRADE_ON_NEW_CHAINS_BENEFIT, ...COW_SWAP_BENEFITS],
   [SupportedChainId.ARBITRUM_ONE]: COW_SWAP_BENEFITS,
-  [SupportedChainId.GNOSIS_CHAIN]: [TRADE_ON_ARBITRUM_BENEFIT, ...COW_SWAP_BENEFITS],
-  [SupportedChainId.SEPOLIA]: [TRADE_ON_ARBITRUM_BENEFIT, ...COW_SWAP_BENEFITS],
+  [SupportedChainId.BASE]: COW_SWAP_BENEFITS,
+  [SupportedChainId.GNOSIS_CHAIN]: [TRADE_ON_NEW_CHAINS_BENEFIT, ...COW_SWAP_BENEFITS],
+  [SupportedChainId.SEPOLIA]: [TRADE_ON_NEW_CHAINS_BENEFIT, ...COW_SWAP_BENEFITS],
 }
 
 function truncateWithEllipsis(str: string, maxLength: number): string {
diff --git a/apps/cowswap-frontend/src/common/pure/RateInfo/index.cosmos.tsx b/apps/cowswap-frontend/src/common/pure/RateInfo/index.cosmos.tsx
index ff9ada0d32..2a2752530a 100644
--- a/apps/cowswap-frontend/src/common/pure/RateInfo/index.cosmos.tsx
+++ b/apps/cowswap-frontend/src/common/pure/RateInfo/index.cosmos.tsx
@@ -1,4 +1,4 @@
-import { COW, GNO, USDC_SEPOLIA, WETH_GNOSIS_CHAIN, WETH_SEPOLIA, WXDAI } from '@cowprotocol/common-const'
+import { COW, GNO_SEPOLIA, USDC_SEPOLIA, WETH_GNOSIS_CHAIN, WETH_SEPOLIA, WXDAI } from '@cowprotocol/common-const'
 import { SupportedChainId } from '@cowprotocol/cow-sdk'
 import { TokenSymbol } from '@cowprotocol/ui'
 import { CurrencyAmount, Token } from '@uniswap/sdk-core'
@@ -9,7 +9,7 @@ import { RateInfo, RateInfoParams } from './index'
 
 const inputCurrency = WETH_GNOSIS_CHAIN
 const outputCurrency = WXDAI
-const GNO_SEPOLIA = GNO[SupportedChainId.GNOSIS_CHAIN]
+
 const COW_SEPOLIA = COW[SupportedChainId.GNOSIS_CHAIN]
 
 const rateInfoParams = {
diff --git a/apps/cowswap-frontend/src/common/services/getQuoteCurrency/index.ts b/apps/cowswap-frontend/src/common/services/getQuoteCurrency/index.ts
index b18d563bec..c79187f9a5 100644
--- a/apps/cowswap-frontend/src/common/services/getQuoteCurrency/index.ts
+++ b/apps/cowswap-frontend/src/common/services/getQuoteCurrency/index.ts
@@ -1,35 +1,10 @@
-import {
-  DAI,
-  DAI_ARBITRUM_ONE,
-  NATIVE_CURRENCY_ADDRESS,
-  USDC_ARBITRUM_ONE,
-  USDC_GNOSIS_CHAIN,
-  USDC_MAINNET,
-  USDC_SEPOLIA,
-  USDT,
-  USDT_ARBITRUM_ONE,
-  USDT_GNOSIS_CHAIN,
-  WXDAI,
-} from '@cowprotocol/common-const'
+import { STABLECOINS } from '@cowprotocol/common-const'
 import { getCurrencyAddress } from '@cowprotocol/common-utils'
 import { SupportedChainId } from '@cowprotocol/cow-sdk'
 import { Currency, CurrencyAmount } from '@uniswap/sdk-core'
 
 import { Nullish } from 'types'
 
-// TODO: Find a solution for using API: https://www.coingecko.com/en/categories/stablecoins
-const STABLE_COINS: Record<SupportedChainId, string[]> = {
-  [SupportedChainId.MAINNET]: [USDC_MAINNET, USDT, DAI].map((token) => token.address.toLowerCase()),
-  [SupportedChainId.GNOSIS_CHAIN]: [USDC_GNOSIS_CHAIN, USDT_GNOSIS_CHAIN, WXDAI]
-    .map((token) => token.address.toLowerCase())
-    // XDAI and WXDAI are stable-coins
-    .concat(NATIVE_CURRENCY_ADDRESS),
-  [SupportedChainId.ARBITRUM_ONE]: [USDT_ARBITRUM_ONE, USDC_ARBITRUM_ONE, DAI_ARBITRUM_ONE].map((token) =>
-    token.address.toLowerCase()
-  ),
-  [SupportedChainId.SEPOLIA]: [USDC_SEPOLIA].map((token) => token.address.toLowerCase()),
-}
-
 /**
  * Quote - means the currency we consider as base (https://www.investopedia.com/terms/q/quotecurrency.asp#:~:text=What%20Is%20a%20Quote%20Currency,value%20of%20the%20base%20currency)
  * For example: 400 UNI -> 2000 USDC - UNI is the quote currency, because is a stable coin against a non-stable coin
@@ -41,7 +16,7 @@ const STABLE_COINS: Record<SupportedChainId, string[]> = {
 export function getQuoteCurrency(
   chainId: SupportedChainId | undefined,
   inputCurrencyAmount: Nullish<CurrencyAmount<Currency>>,
-  outputCurrencyAmount: Nullish<CurrencyAmount<Currency>>
+  outputCurrencyAmount: Nullish<CurrencyAmount<Currency>>,
 ): Currency | null {
   if (!chainId || !inputCurrencyAmount || !outputCurrencyAmount) return null
 
@@ -58,17 +33,17 @@ export function getQuoteCurrency(
 export function getQuoteCurrencyByStableCoin(
   chainId: SupportedChainId | undefined,
   inputCurrency: Currency | null,
-  outputCurrency: Currency | null
+  outputCurrency: Currency | null,
 ): Currency | null {
   if (!chainId || !inputCurrency || !outputCurrency) return null
 
-  const stableCoins = STABLE_COINS[chainId]
+  const stableCoins = STABLECOINS[chainId]
 
   const inputAddress = getCurrencyAddress(inputCurrency).toLowerCase()
   const outputAddress = getCurrencyAddress(outputCurrency).toLowerCase()
 
-  const isInputStableCoin = stableCoins.includes(inputAddress)
-  const isOutputStableCoin = stableCoins.includes(outputAddress)
+  const isInputStableCoin = stableCoins.has(inputAddress)
+  const isOutputStableCoin = stableCoins.has(outputAddress)
 
   if (isInputStableCoin) return outputCurrency
   if (isOutputStableCoin) return inputCurrency
diff --git a/apps/cowswap-frontend/src/legacy/components/AMMsLogo/index.tsx b/apps/cowswap-frontend/src/legacy/components/AMMsLogo/index.tsx
index 14389d2d16..830c764c5f 100644
--- a/apps/cowswap-frontend/src/legacy/components/AMMsLogo/index.tsx
+++ b/apps/cowswap-frontend/src/legacy/components/AMMsLogo/index.tsx
@@ -13,37 +13,6 @@ import Swapr from '@cowprotocol/assets/cow-swap/ammslogo/swapr.png'
 import Symmetric from '@cowprotocol/assets/cow-swap/ammslogo/symmetric.png'
 import Uniswap from '@cowprotocol/assets/cow-swap/ammslogo/uniswap.png'
 import Gno from '@cowprotocol/assets/cow-swap/network-gnosis-chain-logo.svg'
-import { SupportedChainId } from '@cowprotocol/cow-sdk'
-
-import styled from 'styled-components/macro'
-
-import { animationDelay, crossFade, fadeInOut, imagesAnimationDelay, presentationTime } from './utils'
-
-export const Wrapper = styled.div<{ logosLength: number }>`
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  width: 24px;
-  height: 24px;
-  border-radius: 100%;
-  box-shadow: 0px 0px 10px 2px ${({ theme }) => theme.paper};
-  background-color: ${({ theme }) => theme.white};
-  transform-style: preserve-3d;
-  position: absolute;
-  top: -4px;
-  right: 0px;
-
-  img {
-    position: absolute;
-    left: 0;
-    animation: ${(props) => fadeInOut(presentationTime, crossFade, props.logosLength)}
-      ${(props) => animationDelay * props.logosLength}s infinite;
-  }
-
-  ${(props) => imagesAnimationDelay(props.logosLength, animationDelay)}
-`
-
-type Image = { src: string; alt: string }
 
 const SushiImage = { src: Sushi, alt: 'AMMs Sushi' }
 const OneInchImage = { src: Oneinch, alt: 'AMMs 1inch' }
@@ -60,23 +29,6 @@ const LevinSwapImage = { src: Levinswap, alt: 'Levinswap 0x' }
 const SymmetricImage = { src: Symmetric, alt: 'Symmetric 0x' }
 const ZeroXImage = { src: ZeroX, alt: 'AMMs 0x' }
 
-const ETH_AMM_LOGOS = [SushiImage, OneInchImage, ParaSwapImage, UniswapImage, CurveImage, MatchaImage, ZeroXImage]
-
-const LogosPerNetwork: Record<SupportedChainId, Array<Image>> = {
-  [SupportedChainId.MAINNET]: ETH_AMM_LOGOS,
-  [SupportedChainId.SEPOLIA]: ETH_AMM_LOGOS,
-  [SupportedChainId.ARBITRUM_ONE]: ETH_AMM_LOGOS, // TODO: review actual AMMs on arbitrum
-  [SupportedChainId.GNOSIS_CHAIN]: [
-    SushiImage,
-    BaoSwapImage,
-    HoneySwapImage,
-    SwaprImage,
-    SymmetricImage,
-    ElkImage,
-    LevinSwapImage,
-  ],
-}
-
 export const AMM_LOGOS: Record<string, typeof SushiImage> = {
   baoswap: BaoSwapImage,
   balancer: BalancerImage,
@@ -95,12 +47,3 @@ export const AMM_LOGOS: Record<string, typeof SushiImage> = {
   default: { src: Gno, alt: 'Default unknown AMM' },
 }
 
-export function AMMsLogo({ chainId }: { chainId: SupportedChainId }) {
-  return (
-    <Wrapper logosLength={LogosPerNetwork[chainId].length}>
-      {LogosPerNetwork[chainId].map(({ src, alt }, index) => (
-        <img key={index} src={src} alt={alt} />
-      ))}
-    </Wrapper>
-  )
-}
diff --git a/apps/cowswap-frontend/src/mocks/orderMock.ts b/apps/cowswap-frontend/src/mocks/orderMock.ts
index 1d2d23d30b..5a14fb615b 100644
--- a/apps/cowswap-frontend/src/mocks/orderMock.ts
+++ b/apps/cowswap-frontend/src/mocks/orderMock.ts
@@ -1,11 +1,11 @@
-import { COW, GNO } from '@cowprotocol/common-const'
+import { COW, USDC } from '@cowprotocol/common-const'
 import { OrderClass, OrderKind, SigningScheme, SupportedChainId } from '@cowprotocol/cow-sdk'
 
 import { Order, OrderStatus } from 'legacy/state/orders/actions'
 
 export const getOrderMock = (chainId: SupportedChainId): Order => {
   const inputToken = COW[chainId]
-  const outputToken = GNO[chainId]
+  const outputToken = USDC[chainId]
   const creationTime = '2023-05-29T15:27:32.319Z'
 
   return {
diff --git a/apps/cowswap-frontend/src/mocks/tradeStateMock.ts b/apps/cowswap-frontend/src/mocks/tradeStateMock.ts
index 94edb51f66..32f62b4830 100644
--- a/apps/cowswap-frontend/src/mocks/tradeStateMock.ts
+++ b/apps/cowswap-frontend/src/mocks/tradeStateMock.ts
@@ -1,4 +1,4 @@
-import { COW, GNO } from '@cowprotocol/common-const'
+import { COW, GNO_MAINNET } from '@cowprotocol/common-const'
 import { tryParseCurrencyAmount } from '@cowprotocol/common-utils'
 import { SupportedChainId } from '@cowprotocol/cow-sdk'
 import { Currency, Percent, Price } from '@uniswap/sdk-core'
@@ -11,7 +11,7 @@ import { CurrencyInfo } from 'common/pure/CurrencyInputPanel/types'
 const chainId = SupportedChainId.MAINNET
 
 const inputCurrency = COW[chainId]
-const outputCurrency = GNO[chainId]
+const outputCurrency = GNO_MAINNET
 
 export const inputCurrencyInfoMock: CurrencyInfo = {
   field: Field.INPUT,
diff --git a/apps/cowswap-frontend/src/modules/account/containers/AccountDetails/SurplusCard.tsx b/apps/cowswap-frontend/src/modules/account/containers/AccountDetails/SurplusCard.tsx
index 60b2afa635..0481421a6e 100644
--- a/apps/cowswap-frontend/src/modules/account/containers/AccountDetails/SurplusCard.tsx
+++ b/apps/cowswap-frontend/src/modules/account/containers/AccountDetails/SurplusCard.tsx
@@ -21,6 +21,18 @@ import { InfoCard } from './styled'
 
 const DEFAULT_START_DATE = 'March 2023'
 const ARBITRUM_ONE_START_DATE = 'May 2024'
+const BASE_START_DATE = 'December 2024'
+
+
+
+const START_DATE: Record<SupportedChainId, string> = {
+  [SupportedChainId.MAINNET]: DEFAULT_START_DATE,
+  [SupportedChainId.GNOSIS_CHAIN]: DEFAULT_START_DATE,
+  [SupportedChainId.ARBITRUM_ONE]: ARBITRUM_ONE_START_DATE,
+  [SupportedChainId.BASE]: BASE_START_DATE,
+  [SupportedChainId.SEPOLIA]: DEFAULT_START_DATE
+}
+
 
 export function SurplusCard() {
   const { surplusAmount, isLoading } = useTotalSurplus()
@@ -29,7 +41,7 @@ export function SurplusCard() {
   const surplusUsdAmount = useUsdAmount(showSurplusAmount ? surplusAmount : undefined).value
   const native = useNativeCurrency()
   const nativeSymbol = native.symbol || 'ETH'
-  const isArbitrumOne = native.chainId === SupportedChainId.ARBITRUM_ONE
+  const startDate = START_DATE[native.chainId as SupportedChainId]
 
   const Wrapper = styled.div`
     margin: 12px auto 24px;
@@ -158,9 +170,7 @@ export function SurplusCard() {
             <i>
               Your total surplus{' '}
               <HelpTooltip
-                text={`The total surplus CoW Swap has generated for you in ${nativeSymbol} across all your trades since ${
-                  isArbitrumOne ? ARBITRUM_ONE_START_DATE : DEFAULT_START_DATE
-                }`}
+                text={`The total surplus CoW Swap has generated for you in ${nativeSymbol} across all your trades since ${startDate}`}
               />
             </i>
           </span>
diff --git a/apps/cowswap-frontend/src/modules/limitOrders/pure/LimitOrdersDetails/index.cosmos.tsx b/apps/cowswap-frontend/src/modules/limitOrders/pure/LimitOrdersDetails/index.cosmos.tsx
index 4b5609f3c3..26f9743adb 100644
--- a/apps/cowswap-frontend/src/modules/limitOrders/pure/LimitOrdersDetails/index.cosmos.tsx
+++ b/apps/cowswap-frontend/src/modules/limitOrders/pure/LimitOrdersDetails/index.cosmos.tsx
@@ -1,6 +1,6 @@
 import { SetStateAction } from 'jotai'
 
-import { COW, GNO } from '@cowprotocol/common-const'
+import { COW, GNO_MAINNET } from '@cowprotocol/common-const'
 import { OrderClass, OrderKind, SupportedChainId } from '@cowprotocol/cow-sdk'
 import { CurrencyAmount } from '@uniswap/sdk-core'
 
@@ -14,7 +14,7 @@ import { TradeFlowContext } from '../../services/types'
 import { LimitOrdersDetails } from './index'
 
 const inputCurrency = COW[SupportedChainId.MAINNET]
-const outputCurrency = GNO[SupportedChainId.MAINNET]
+const outputCurrency = GNO_MAINNET
 
 const rateInfoParams = {
   chainId: 5,
diff --git a/apps/cowswap-frontend/src/modules/ordersTable/pure/OrdersTableContainer/orders.mock.ts b/apps/cowswap-frontend/src/modules/ordersTable/pure/OrdersTableContainer/orders.mock.ts
index 68638447dc..46c3abdb6d 100644
--- a/apps/cowswap-frontend/src/modules/ordersTable/pure/OrdersTableContainer/orders.mock.ts
+++ b/apps/cowswap-frontend/src/modules/ordersTable/pure/OrdersTableContainer/orders.mock.ts
@@ -1,4 +1,4 @@
-import { COW, DAI, GNO, USDC, WETH_GNOSIS_CHAIN } from '@cowprotocol/common-const'
+import { COW, DAI, GNO_GNOSIS_CHAIN, USDC, WETH_GNOSIS_CHAIN } from '@cowprotocol/common-const'
 import { OrderClass, OrderKind, SigningScheme } from '@cowprotocol/cow-sdk'
 
 import { OrderStatus } from 'legacy/state/orders/actions'
@@ -16,10 +16,10 @@ export const ordersMock: ParsedOrder[] = [
     status: OrderStatus.PENDING,
     creationTime: '2022-11-11T13:15:13.551Z',
     inputToken: WETH_GNOSIS_CHAIN,
-    outputToken: GNO[chainId],
+    outputToken: GNO_GNOSIS_CHAIN,
     receiver: '',
     sellToken: WETH_GNOSIS_CHAIN.address,
-    buyToken: GNO[chainId].address,
+    buyToken: GNO_GNOSIS_CHAIN.address,
     sellAmount: '5000300000000000',
     buyAmount: '23000000000000',
     sellAmountBeforeFee: '5000300000000000',
@@ -39,10 +39,10 @@ export const ordersMock: ParsedOrder[] = [
     status: OrderStatus.PENDING,
     creationTime: '2022-10-03T09:15:13.551Z',
     inputToken: COW[chainId],
-    outputToken: GNO[chainId],
+    outputToken: GNO_GNOSIS_CHAIN,
     receiver: '',
     sellToken: COW[chainId].address,
-    buyToken: GNO[chainId].address,
+    buyToken: GNO_GNOSIS_CHAIN.address,
     sellAmount: '1230000000000000',
     buyAmount: '55000000000000',
     sellAmountBeforeFee: '1230000000000000',
@@ -85,10 +85,10 @@ export const ordersMock: ParsedOrder[] = [
     status: OrderStatus.FULFILLED,
     creationTime: '2022-11-11T13:15:13.551Z',
     inputToken: USDC[chainId],
-    outputToken: GNO[chainId],
+    outputToken: GNO_GNOSIS_CHAIN,
     receiver: '',
     sellToken: USDC[chainId].address,
-    buyToken: GNO[chainId].address,
+    buyToken: GNO_GNOSIS_CHAIN.address,
     sellAmount: '5000300000000000',
     buyAmount: '23000000000000',
     sellAmountBeforeFee: '5000300000000000',
diff --git a/apps/cowswap-frontend/src/modules/swap/pure/banners/TwapSuggestionBanner.tsx b/apps/cowswap-frontend/src/modules/swap/pure/banners/TwapSuggestionBanner.tsx
index e11fefff2a..53f3c0dfcc 100644
--- a/apps/cowswap-frontend/src/modules/swap/pure/banners/TwapSuggestionBanner.tsx
+++ b/apps/cowswap-frontend/src/modules/swap/pure/banners/TwapSuggestionBanner.tsx
@@ -34,6 +34,7 @@ const AMOUNT_LIMIT: Record<SupportedChainId, number> = {
   [SupportedChainId.MAINNET]: 50_000, // $50,000
   [SupportedChainId.GNOSIS_CHAIN]: 500, // $500
   [SupportedChainId.ARBITRUM_ONE]: 500, // $500
+  [SupportedChainId.BASE]: 500, // $500
   [SupportedChainId.SEPOLIA]: 100, // $100
 }
 
diff --git a/apps/cowswap-frontend/src/modules/twap/const.ts b/apps/cowswap-frontend/src/modules/twap/const.ts
index be419cdb17..2165b7e75e 100644
--- a/apps/cowswap-frontend/src/modules/twap/const.ts
+++ b/apps/cowswap-frontend/src/modules/twap/const.ts
@@ -41,6 +41,7 @@ export const MINIMUM_PART_SELL_AMOUNT_FIAT: Record<SupportedChainId, CurrencyAmo
   [SupportedChainId.MAINNET]: CurrencyAmount.fromRawAmount(USDC[SupportedChainId.MAINNET], 1_000e6), // 1k
   [SupportedChainId.GNOSIS_CHAIN]: CurrencyAmount.fromRawAmount(USDC[SupportedChainId.GNOSIS_CHAIN], 5e6), // 5
   [SupportedChainId.ARBITRUM_ONE]: CurrencyAmount.fromRawAmount(USDC[SupportedChainId.ARBITRUM_ONE], 5e6), // 5
+  [SupportedChainId.BASE]: CurrencyAmount.fromRawAmount(USDC[SupportedChainId.BASE], 5e6), // 5
   [SupportedChainId.SEPOLIA]: CurrencyAmount.fromRawAmount(USDC[SupportedChainId.SEPOLIA], 100e18), // 100
 }
 
diff --git a/apps/cowswap-frontend/src/modules/usdAmount/apis/getCoingeckoUsdPrice.ts b/apps/cowswap-frontend/src/modules/usdAmount/apis/getCoingeckoUsdPrice.ts
index 3609a7d9b4..1ff4164ea3 100644
--- a/apps/cowswap-frontend/src/modules/usdAmount/apis/getCoingeckoUsdPrice.ts
+++ b/apps/cowswap-frontend/src/modules/usdAmount/apis/getCoingeckoUsdPrice.ts
@@ -20,6 +20,7 @@ export const COINGECKO_PLATFORMS: Record<SupportedChainId, string | null> = {
   [SupportedChainId.MAINNET]: 'ethereum',
   [SupportedChainId.GNOSIS_CHAIN]: 'xdai',
   [SupportedChainId.ARBITRUM_ONE]: 'arbitrum-one',
+  [SupportedChainId.BASE]: 'base',
   [SupportedChainId.SEPOLIA]: null,
 }
 
@@ -91,7 +92,7 @@ export async function getCoingeckoUsdPrice(currency: Token): Promise<Fraction |
 }
 
 function isErrorResponse(
-  res: SuccessCoingeckoUsdQuoteResponse | ErrorCoingeckoResponse
+  res: SuccessCoingeckoUsdQuoteResponse | ErrorCoingeckoResponse,
 ): res is ErrorCoingeckoResponse {
   return 'status' in res
 }
diff --git a/apps/cowswap-frontend/src/modules/usdAmount/apis/getDefillamaUsdPrice.ts b/apps/cowswap-frontend/src/modules/usdAmount/apis/getDefillamaUsdPrice.ts
index 2063d89e8e..cc5524808b 100644
--- a/apps/cowswap-frontend/src/modules/usdAmount/apis/getDefillamaUsdPrice.ts
+++ b/apps/cowswap-frontend/src/modules/usdAmount/apis/getDefillamaUsdPrice.ts
@@ -20,6 +20,7 @@ export const DEFILLAMA_PLATFORMS: Record<SupportedChainId, string | null> = {
   [SupportedChainId.MAINNET]: 'ethereum',
   [SupportedChainId.GNOSIS_CHAIN]: 'xdai',
   [SupportedChainId.ARBITRUM_ONE]: 'arbitrum-one',
+  [SupportedChainId.BASE]: 'base',
   [SupportedChainId.SEPOLIA]: null,
 }
 
diff --git a/apps/cowswap-frontend/src/modules/volumeFee/state/cowswapFeeAtom.ts b/apps/cowswap-frontend/src/modules/volumeFee/state/cowswapFeeAtom.ts
index d613237a71..b22878a4e3 100644
--- a/apps/cowswap-frontend/src/modules/volumeFee/state/cowswapFeeAtom.ts
+++ b/apps/cowswap-frontend/src/modules/volumeFee/state/cowswapFeeAtom.ts
@@ -1,6 +1,6 @@
 import { atom } from 'jotai'
 
-import { STABLECOINS, LpToken } from '@cowprotocol/common-const'
+import { LpToken, STABLECOINS } from '@cowprotocol/common-const'
 import { getCurrencyAddress, isInjectedWidget } from '@cowprotocol/common-utils'
 import { SupportedChainId } from '@cowprotocol/cow-sdk'
 import { walletInfoAtom } from '@cowprotocol/wallet'
@@ -18,6 +18,7 @@ const COWSWAP_VOLUME_FEES: Record<SupportedChainId, VolumeFee | null> = {
     bps: 10, // 0.1%
     recipient: '0x451100Ffc88884bde4ce87adC8bB6c7Df7fACccd', // Arb1 Protocol fee safe
   },
+  [SupportedChainId.BASE]: null,
   [SupportedChainId.GNOSIS_CHAIN]: {
     bps: 10, // 0.1%
     recipient: '0x6b3214fD11dc91De14718DeE98Ef59bCbFcfB432', // Gnosis Chain Protocol fee safe
@@ -26,6 +27,14 @@ const COWSWAP_VOLUME_FEES: Record<SupportedChainId, VolumeFee | null> = {
 
 export const cowSwapFeeAtom = atom((get) => {
   const { chainId, account } = get(walletInfoAtom)
+
+  const volumeFee = COWSWAP_VOLUME_FEES[chainId]
+
+  // Early exit if fee is not set for this network
+  if (!volumeFee) {
+    return null
+  }
+
   const tradeState = get(derivedTradeStateAtom)
   const tradeTypeState = get(tradeTypeAtom)
   const isYieldWidget = tradeTypeState?.tradeType === TradeType.YIELD
@@ -52,7 +61,7 @@ export const cowSwapFeeAtom = atom((get) => {
   // No stable-stable trades
   if (isInputTokenStable && isOutputTokenStable) return null
 
-  return COWSWAP_VOLUME_FEES[chainId]
+  return volumeFee
 })
 
 function shouldApplyFee(account: string | undefined, percentage: number | boolean | undefined): boolean {
diff --git a/apps/cowswap-frontend/src/modules/yield/lpPageLinks.ts b/apps/cowswap-frontend/src/modules/yield/lpPageLinks.ts
index 9df218f5b3..4304ef758f 100644
--- a/apps/cowswap-frontend/src/modules/yield/lpPageLinks.ts
+++ b/apps/cowswap-frontend/src/modules/yield/lpPageLinks.ts
@@ -5,6 +5,7 @@ const COW_AMM_CHAINS = {
   [SupportedChainId.MAINNET]: 'ethereum',
   [SupportedChainId.GNOSIS_CHAIN]: 'gnosis',
   [SupportedChainId.ARBITRUM_ONE]: 'arbitrum',
+  [SupportedChainId.BASE]: 'base',
   [SupportedChainId.SEPOLIA]: '',
 }
 
@@ -12,6 +13,7 @@ const UNI_CHAINS = {
   [SupportedChainId.MAINNET]: 'ethereum',
   [SupportedChainId.GNOSIS_CHAIN]: '',
   [SupportedChainId.ARBITRUM_ONE]: 'arbitrum',
+  [SupportedChainId.BASE]: 'base',
   [SupportedChainId.SEPOLIA]: '',
 }
 
@@ -19,6 +21,7 @@ const SUSHI_CHAINS = {
   [SupportedChainId.MAINNET]: 'ethereum',
   [SupportedChainId.GNOSIS_CHAIN]: 'gnosis',
   [SupportedChainId.ARBITRUM_ONE]: 'arbitrum',
+  [SupportedChainId.BASE]: 'base',
   [SupportedChainId.SEPOLIA]: '',
 }
 
@@ -26,6 +29,7 @@ const PANCAKE_CHAINS = {
   [SupportedChainId.MAINNET]: 'eth',
   [SupportedChainId.GNOSIS_CHAIN]: '',
   [SupportedChainId.ARBITRUM_ONE]: 'arb',
+  [SupportedChainId.BASE]: 'base',
   [SupportedChainId.SEPOLIA]: '',
 }
 
diff --git a/apps/cowswap-frontend/src/pages/Account/LockedGnoVesting/claimData/index.ts b/apps/cowswap-frontend/src/pages/Account/LockedGnoVesting/claimData/index.ts
index e5cef58989..7ac49d1946 100644
--- a/apps/cowswap-frontend/src/pages/Account/LockedGnoVesting/claimData/index.ts
+++ b/apps/cowswap-frontend/src/pages/Account/LockedGnoVesting/claimData/index.ts
@@ -13,6 +13,7 @@ const indexFiles: Record<SupportedChainId, string[]> = {
   [SupportedChainId.MAINNET]: mainnetIndex,
   [SupportedChainId.GNOSIS_CHAIN]: gnosisChainIndex,
   [SupportedChainId.ARBITRUM_ONE]: [],
+  [SupportedChainId.BASE]: [],
   [SupportedChainId.SEPOLIA]: [],
 }
 
@@ -20,6 +21,7 @@ const chainNames: Record<SupportedChainId, string | null> = {
   [SupportedChainId.MAINNET]: 'mainnet',
   [SupportedChainId.GNOSIS_CHAIN]: 'gnosisChain',
   [SupportedChainId.ARBITRUM_ONE]: null,
+  [SupportedChainId.BASE]: null,
   [SupportedChainId.SEPOLIA]: null,
 }
 
@@ -53,7 +55,7 @@ const fetchChunk = (path: string) => {
   const promise =
     chunkCache.get(path) ??
     (fetch(
-      `https://raw.githubusercontent.com/gnosis/locked-gno-cow-merkle-distro/${DISTRO_REPO_BRANCH_NAME}/${path}`
+      `https://raw.githubusercontent.com/gnosis/locked-gno-cow-merkle-distro/${DISTRO_REPO_BRANCH_NAME}/${path}`,
     ).then((res) => res.json()) as Promise<Record<string, Claim>>)
   chunkCache.set(path, promise)
   return promise
diff --git a/apps/explorer/src/const.ts b/apps/explorer/src/const.ts
index 9d9bf8d878..2a7dab76ea 100644
--- a/apps/explorer/src/const.ts
+++ b/apps/explorer/src/const.ts
@@ -96,6 +96,7 @@ export const MEDIA = {
 export const WETH_ADDRESS_MAINNET = '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2'
 export const WXDAI_ADDRESS_XDAI = '0xe91D153E0b41518A2Ce8Dd3D7944Fa863463a97d'
 export const WETH_ADDRESS_ARBITRUM_ONE = '0x82af49447d8a07e3bd95bd0d56f35241523fbab1'
+export const WETH_ADDRESS_BASE = '0x4200000000000000000000000000000000000006'
 export const WETH_ADDRESS_SEPOLIA = '0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14'
 export const NATIVE_TOKEN_ADDRESS = '0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE'
 export const NATIVE_TOKEN_ADDRESS_LOWERCASE = NATIVE_TOKEN_ADDRESS.toLowerCase()
@@ -104,6 +105,7 @@ export const WRAPPED_NATIVE_ADDRESS: Record<SupportedChainId, string> = {
   [SupportedChainId.MAINNET]: WETH_ADDRESS_MAINNET,
   [SupportedChainId.GNOSIS_CHAIN]: WXDAI_ADDRESS_XDAI,
   [SupportedChainId.ARBITRUM_ONE]: WETH_ADDRESS_ARBITRUM_ONE,
+  [SupportedChainId.BASE]: WETH_ADDRESS_BASE,
   [SupportedChainId.SEPOLIA]: WETH_ADDRESS_SEPOLIA,
 }
 
@@ -125,6 +127,7 @@ export const NATIVE_TOKEN_PER_NETWORK: Record<SupportedChainId, TokenErc20> = {
   [SupportedChainId.MAINNET]: ETH,
   [SupportedChainId.GNOSIS_CHAIN]: XDAI,
   [SupportedChainId.ARBITRUM_ONE]: ETH,
+  [SupportedChainId.BASE]: ETH,
   [SupportedChainId.SEPOLIA]: ETH,
 }
 
diff --git a/apps/explorer/src/consts/subgraphUrls.ts b/apps/explorer/src/consts/subgraphUrls.ts
index 72f9ffba37..ab1f94af67 100644
--- a/apps/explorer/src/consts/subgraphUrls.ts
+++ b/apps/explorer/src/consts/subgraphUrls.ts
@@ -11,5 +11,6 @@ export const SUBGRAPH_URLS: Record<SupportedChainId, string | null> = {
   [SupportedChainId.MAINNET]: getSubgraphUrl(SupportedChainId.MAINNET, 'MAINNET'),
   [SupportedChainId.GNOSIS_CHAIN]: getSubgraphUrl(SupportedChainId.GNOSIS_CHAIN, 'GNOSIS_CHAIN'),
   [SupportedChainId.ARBITRUM_ONE]: getSubgraphUrl(SupportedChainId.ARBITRUM_ONE, 'ARBITRUM_ONE'),
+  [SupportedChainId.BASE]: getSubgraphUrl(SupportedChainId.BASE, 'BASE'),
   [SupportedChainId.SEPOLIA]: getSubgraphUrl(SupportedChainId.SEPOLIA, 'SEPOLIA'),
 }
diff --git a/apps/explorer/src/explorer/pages/Home/index.tsx b/apps/explorer/src/explorer/pages/Home/index.tsx
index 26b8daf2e4..e16587b8e7 100644
--- a/apps/explorer/src/explorer/pages/Home/index.tsx
+++ b/apps/explorer/src/explorer/pages/Home/index.tsx
@@ -65,6 +65,7 @@ const SHOW_TOKENS_TABLE: Record<SupportedChainId, boolean> = {
   [SupportedChainId.MAINNET]: true,
   [SupportedChainId.GNOSIS_CHAIN]: false, // Gchain data is not reliable
   [SupportedChainId.ARBITRUM_ONE]: false, // No data for Arbitrum one
+  [SupportedChainId.BASE]: false, // No data for Base
   [SupportedChainId.SEPOLIA]: false, // No data for Sepolia
 }
 
diff --git a/apps/explorer/src/hooks/useTokenList.ts b/apps/explorer/src/hooks/useTokenList.ts
index dfb68b3bc2..c911d0506e 100644
--- a/apps/explorer/src/hooks/useTokenList.ts
+++ b/apps/explorer/src/hooks/useTokenList.ts
@@ -1,7 +1,7 @@
 import { useMemo } from 'react'
 
 import { SWR_NO_REFRESH_OPTIONS } from '@cowprotocol/common-const'
-import { ALL_SUPPORTED_CHAIN_IDS, SupportedChainId, mapSupportedNetworks } from '@cowprotocol/cow-sdk'
+import { ALL_SUPPORTED_CHAIN_IDS, mapSupportedNetworks, SupportedChainId } from '@cowprotocol/cow-sdk'
 import type { TokenInfo, TokenList } from '@uniswap/token-lists'
 
 import useSWR from 'swr'
@@ -15,27 +15,36 @@ export function useTokenList(chainId: SupportedChainId | undefined): { data: Tok
   const { data: cowSwapList, isLoading: isCowListLoading } = useTokenListByUrl(
     chainId !== SupportedChainId.SEPOLIA
       ? 'https://files.cow.fi/tokens/CowSwap.json'
-      : 'https://raw.githubusercontent.com/cowprotocol/token-lists/main/src/public/CowSwapSepolia.json'
+      : 'https://raw.githubusercontent.com/cowprotocol/token-lists/main/src/public/CowSwapSepolia.json',
   )
   const { data: coingeckoList, isLoading: isCoingeckoListLoading } = useTokenListByUrl(
-    chainId === SupportedChainId.MAINNET ? 'https://tokens.coingecko.com/uniswap/all.json' : ''
+    chainId === SupportedChainId.MAINNET ? 'https://tokens.coingecko.com/uniswap/all.json' : '',
   )
   const { data: honeyswapList, isLoading: isHoneyswapListLoading } = useTokenListByUrl(
-    chainId === SupportedChainId.GNOSIS_CHAIN ? 'https://tokens.honeyswap.org' : ''
+    chainId === SupportedChainId.GNOSIS_CHAIN ? 'https://tokens.honeyswap.org' : '',
   )
   const { data: arbitrumOneList, isLoading: isArbitrumOneListLoading } = useTokenListByUrl(
-    chainId === SupportedChainId.ARBITRUM_ONE ? 'https://tokens.coingecko.com/arbitrum-one/all.json' : ''
+    chainId === SupportedChainId.ARBITRUM_ONE ? 'https://tokens.coingecko.com/arbitrum-one/all.json' : '',
+  )
+  const { data: baseList, isLoading: isBaseListLoading } = useTokenListByUrl(
+    chainId === SupportedChainId.BASE ? 'https://tokens.coingecko.com/base/all.json' : '',
   )
 
   const isLoading = chainId
-    ? isCowListLoading || isHoneyswapListLoading || isCoingeckoListLoading || isArbitrumOneListLoading
+    ? isCowListLoading ||
+      isHoneyswapListLoading ||
+      isCoingeckoListLoading ||
+      isArbitrumOneListLoading ||
+      isBaseListLoading
     : false
 
   return useMemo(() => {
-    const data = chainId ? { ...coingeckoList, ...honeyswapList, ...cowSwapList, ...arbitrumOneList }[chainId] : {}
+    const data = chainId
+      ? { ...coingeckoList, ...honeyswapList, ...cowSwapList, ...arbitrumOneList, ...baseList }[chainId]
+      : {}
 
     return { data, isLoading }
-  }, [chainId, coingeckoList, honeyswapList, cowSwapList, arbitrumOneList, isLoading])
+  }, [chainId, coingeckoList, honeyswapList, cowSwapList, arbitrumOneList, isLoading, baseList])
 }
 
 function useTokenListByUrl(tokenListUrl: string) {
@@ -58,6 +67,6 @@ function fetcher(tokenListUrl: string): Promise<TokenListPerNetwork> {
           acc[token.chainId][token.address.toLowerCase()] = token
         }
         return acc
-      }, INITIAL_TOKEN_LIST_PER_NETWORK)
+      }, INITIAL_TOKEN_LIST_PER_NETWORK),
     )
 }
diff --git a/apps/widget-configurator/src/app/configurator/consts.ts b/apps/widget-configurator/src/app/configurator/consts.ts
index 30cf0b2f20..4957a0d00a 100644
--- a/apps/widget-configurator/src/app/configurator/consts.ts
+++ b/apps/widget-configurator/src/app/configurator/consts.ts
@@ -8,10 +8,12 @@ import { TokenListItem } from './types'
 const GNOSIS_DEFAULT_PARTNER_FEE_RECIPIENT = '0x6b3214fd11dc91de14718dee98ef59bcbfcfb432'
 const MAINNET_DEFAULT_PARTNER_FEE_RECIPIENT = '0xB64963f95215FDe6510657e719bd832BB8bb941B'
 const ARB1_DEFAULT_PARTNER_FEE_RECIPIENT = '0x451100Ffc88884bde4ce87adC8bB6c7Df7fACccd'
+const BASE_DEFAULT_PARTNER_FEE_RECIPIENT = '0x3c4DBcCf8d80D3d92B0d82197aebf52574ED1F3B'
 export const DEFAULT_PARTNER_FEE_RECIPIENT_PER_NETWORK: Record<SupportedChainId, string> = {
   [SupportedChainId.MAINNET]: MAINNET_DEFAULT_PARTNER_FEE_RECIPIENT,
   [SupportedChainId.GNOSIS_CHAIN]: GNOSIS_DEFAULT_PARTNER_FEE_RECIPIENT,
   [SupportedChainId.ARBITRUM_ONE]: ARB1_DEFAULT_PARTNER_FEE_RECIPIENT,
+  [SupportedChainId.BASE]: BASE_DEFAULT_PARTNER_FEE_RECIPIENT,
   [SupportedChainId.SEPOLIA]: MAINNET_DEFAULT_PARTNER_FEE_RECIPIENT,
 }
 
diff --git a/libs/assets/src/cow-swap/network-base-logo.svg b/libs/assets/src/cow-swap/network-base-logo.svg
new file mode 100644
index 0000000000..9fc6d5b4af
--- /dev/null
+++ b/libs/assets/src/cow-swap/network-base-logo.svg
@@ -0,0 +1,4 @@
+<svg width="146" height="146" viewBox="0 0 146 146" fill="none" xmlns="http://www.w3.org/2000/svg">
+<circle cx="73" cy="73" r="73" fill="#0052FF"/>
+<path d="M73.323 123.729C101.617 123.729 124.553 100.832 124.553 72.5875C124.553 44.343 101.617 21.4463 73.323 21.4463C46.4795 21.4463 24.4581 42.0558 22.271 68.2887H89.9859V76.8864H22.271C24.4581 103.119 46.4795 123.729 73.323 123.729Z" fill="white"/>
+</svg>
diff --git a/libs/common-const/src/chainInfo.ts b/libs/common-const/src/chainInfo.ts
index 072a077c83..5edd3d0ed9 100644
--- a/libs/common-const/src/chainInfo.ts
+++ b/libs/common-const/src/chainInfo.ts
@@ -1,5 +1,6 @@
 import ArbitrumOneLogoLight from '@cowprotocol/assets/cow-swap/network-arbitrum-one-logo-blue.svg'
 import ArbitrumOneLogoDark from '@cowprotocol/assets/cow-swap/network-arbitrum-one-logo-white.svg'
+import BaseLogo from '@cowprotocol/assets/cow-swap/network-base-logo.svg'
 import GnosisChainLogo from '@cowprotocol/assets/cow-swap/network-gnosis-chain-logo.svg'
 import EthereumLogo from '@cowprotocol/assets/cow-swap/network-mainnet-logo.svg'
 import SepoliaLogo from '@cowprotocol/assets/cow-swap/network-sepolia-logo.svg'
@@ -55,6 +56,20 @@ export const CHAIN_INFO: ChainInfoMap = {
     color: '#1B4ADD',
     nativeCurrency: NATIVE_CURRENCIES[SupportedChainId.ARBITRUM_ONE],
   },
+  [SupportedChainId.BASE]: {
+    docs: 'https://docs.base.org/',
+    bridge: 'https://bridge.base.org/deposit',
+    explorer: 'https://basescan.org',
+    infoLink: 'https://www.base.org/',
+    label: 'Base',
+    addressPrefix: 'base',
+    name: 'base',
+    explorerTitle: 'Basescan',
+    urlAlias: 'base',
+    logo: { light: BaseLogo, dark: BaseLogo },
+    color: '#0052FF',
+    nativeCurrency: NATIVE_CURRENCIES[SupportedChainId.BASE],
+  },
   [SupportedChainId.GNOSIS_CHAIN]: {
     docs: 'https://docs.gnosischain.com',
     bridge: 'https://bridge.gnosischain.com/',
diff --git a/libs/common-const/src/common.ts b/libs/common-const/src/common.ts
index f2031d8498..2047d11a3e 100644
--- a/libs/common-const/src/common.ts
+++ b/libs/common-const/src/common.ts
@@ -50,6 +50,7 @@ export const V_COW_CONTRACT_ADDRESS: Record<SupportedChainId, string | null> = {
   [SupportedChainId.MAINNET]: '0xd057b63f5e69cf1b929b356b579cba08d7688048',
   [SupportedChainId.GNOSIS_CHAIN]: '0xc20C9C13E853fc64d054b73fF21d3636B2d97eaB',
   [SupportedChainId.ARBITRUM_ONE]: null, // doesn't exist!
+  [SupportedChainId.BASE]: null, // doesn't exist!
   [SupportedChainId.SEPOLIA]: '0x21d06a222bbb94ec1406a0a8ba86b4d761bc9864',
 }
 
@@ -57,6 +58,7 @@ export const COW_CONTRACT_ADDRESS: Record<SupportedChainId, string> = {
   [SupportedChainId.MAINNET]: '0xDEf1CA1fb7FBcDC777520aa7f396b4E015F497aB',
   [SupportedChainId.GNOSIS_CHAIN]: '0x177127622c4A00F3d409B75571e12cB3c8973d3c',
   [SupportedChainId.ARBITRUM_ONE]: '0xcb8b5cd20bdcaea9a010ac1f8d835824f5c87a04',
+  [SupportedChainId.BASE]: '0xc694a91e6b071bF030A18BD3053A7fE09B6DaE69',
   [SupportedChainId.SEPOLIA]: '0x0625aFB445C3B6B7B929342a04A22599fd5dBB59',
 }
 
@@ -73,11 +75,12 @@ export const MINIMUM_ETH_FLOW_SLIPPAGE_BPS: Record<SupportedChainId, number> = {
   [SupportedChainId.MAINNET]: 200, // 2%
   [SupportedChainId.GNOSIS_CHAIN]: DEFAULT_SLIPPAGE_BPS,
   [SupportedChainId.ARBITRUM_ONE]: DEFAULT_SLIPPAGE_BPS,
+  [SupportedChainId.BASE]: DEFAULT_SLIPPAGE_BPS,
   [SupportedChainId.SEPOLIA]: DEFAULT_SLIPPAGE_BPS,
 }
 
 export const MINIMUM_ETH_FLOW_SLIPPAGE: Record<SupportedChainId, Percent> = mapSupportedNetworks(
-  (chainId) => new Percent(MINIMUM_ETH_FLOW_SLIPPAGE_BPS[chainId], 10_000)
+  (chainId) => new Percent(MINIMUM_ETH_FLOW_SLIPPAGE_BPS[chainId], 10_000),
 )
 export const HIGH_ETH_FLOW_SLIPPAGE_BPS = 1_000 // 10%
 
@@ -110,12 +113,14 @@ export const GAS_FEE_ENDPOINTS: Record<SupportedChainId, string> = {
   [SupportedChainId.MAINNET]: 'https://api.blocknative.com/gasprices/blockprices',
   [SupportedChainId.GNOSIS_CHAIN]: 'https://gnosis.blockscout.com/api/v1/gas-price-oracle',
   [SupportedChainId.ARBITRUM_ONE]: 'https://arbitrum.blockscout.com/api/v1/gas-price-oracle',
+  [SupportedChainId.BASE]: 'https://base.blockscout.com/api/v1/gas-price-oracle',
   [SupportedChainId.SEPOLIA]: '',
 }
 export const GAS_API_KEYS: Record<SupportedChainId, string | null> = {
   [SupportedChainId.MAINNET]: process.env.REACT_APP_BLOCKNATIVE_API_KEY || null,
   [SupportedChainId.GNOSIS_CHAIN]: null,
   [SupportedChainId.ARBITRUM_ONE]: null,
+  [SupportedChainId.BASE]: null,
   [SupportedChainId.SEPOLIA]: null,
 }
 
diff --git a/libs/common-const/src/nativeAndWrappedTokens.ts b/libs/common-const/src/nativeAndWrappedTokens.ts
index 9455310c80..d372938b99 100644
--- a/libs/common-const/src/nativeAndWrappedTokens.ts
+++ b/libs/common-const/src/nativeAndWrappedTokens.ts
@@ -16,7 +16,7 @@ export const WRAPPED_NATIVE_CURRENCIES: Record<SupportedChainId, TokenWithLogo>
     WETH9_MAINNET_ADDRESS,
     DEFAULT_NATIVE_DECIMALS,
     'WETH',
-    'Wrapped Ether'
+    'Wrapped Ether',
   ),
   [SupportedChainId.GNOSIS_CHAIN]: new TokenWithLogo(
     undefined,
@@ -24,7 +24,7 @@ export const WRAPPED_NATIVE_CURRENCIES: Record<SupportedChainId, TokenWithLogo>
     '0xe91D153E0b41518A2Ce8Dd3D7944Fa863463a97d',
     DEFAULT_NATIVE_DECIMALS,
     'WXDAI',
-    'Wrapped XDAI'
+    'Wrapped XDAI',
   ),
   [SupportedChainId.ARBITRUM_ONE]: new TokenWithLogo(
     ETH_LOGO_URL,
@@ -32,7 +32,15 @@ export const WRAPPED_NATIVE_CURRENCIES: Record<SupportedChainId, TokenWithLogo>
     '0x82aF49447D8a07e3bd95BD0d56f35241523fBab1',
     DEFAULT_NATIVE_DECIMALS,
     'WETH',
-    'Wrapped Ether'
+    'Wrapped Ether',
+  ),
+  [SupportedChainId.BASE]: new TokenWithLogo(
+    ETH_LOGO_URL,
+    SupportedChainId.BASE,
+    '0x4200000000000000000000000000000000000006',
+    DEFAULT_NATIVE_DECIMALS,
+    'WETH',
+    'Wrapped Ether',
   ),
   [SupportedChainId.SEPOLIA]: new TokenWithLogo(
     ETH_LOGO_URL,
@@ -40,7 +48,7 @@ export const WRAPPED_NATIVE_CURRENCIES: Record<SupportedChainId, TokenWithLogo>
     '0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14',
     DEFAULT_NATIVE_DECIMALS,
     'WETH',
-    'Wrapped Ether'
+    'Wrapped Ether',
   ),
 }
 
@@ -51,7 +59,7 @@ export const NATIVE_CURRENCIES: Record<SupportedChainId, TokenWithLogo> = {
     NATIVE_CURRENCY_ADDRESS,
     DEFAULT_NATIVE_DECIMALS,
     'ETH',
-    'Ether'
+    'Ether',
   ),
   [SupportedChainId.GNOSIS_CHAIN]: new TokenWithLogo(
     undefined,
@@ -59,7 +67,7 @@ export const NATIVE_CURRENCIES: Record<SupportedChainId, TokenWithLogo> = {
     NATIVE_CURRENCY_ADDRESS,
     DEFAULT_NATIVE_DECIMALS,
     'xDAI',
-    'xDAI'
+    'xDAI',
   ),
   [SupportedChainId.ARBITRUM_ONE]: new TokenWithLogo(
     undefined,
@@ -67,7 +75,15 @@ export const NATIVE_CURRENCIES: Record<SupportedChainId, TokenWithLogo> = {
     NATIVE_CURRENCY_ADDRESS,
     DEFAULT_NATIVE_DECIMALS,
     'ETH',
-    'Ether'
+    'Ether',
+  ),
+  [SupportedChainId.BASE]: new TokenWithLogo(
+    undefined,
+    SupportedChainId.BASE,
+    NATIVE_CURRENCY_ADDRESS,
+    DEFAULT_NATIVE_DECIMALS,
+    'ETH',
+    'Ether',
   ),
   [SupportedChainId.SEPOLIA]: new TokenWithLogo(
     undefined,
@@ -75,7 +91,7 @@ export const NATIVE_CURRENCIES: Record<SupportedChainId, TokenWithLogo> = {
     NATIVE_CURRENCY_ADDRESS,
     DEFAULT_NATIVE_DECIMALS,
     'ETH',
-    'Ether'
+    'Ether',
   ),
 }
 
diff --git a/libs/common-const/src/networks.ts b/libs/common-const/src/networks.ts
index b70980c548..43b4380939 100644
--- a/libs/common-const/src/networks.ts
+++ b/libs/common-const/src/networks.ts
@@ -7,6 +7,7 @@ const RPC_URL_ENVS: Record<SupportedChainId, string | undefined> = {
   [SupportedChainId.MAINNET]: process.env.REACT_APP_NETWORK_URL_1 || undefined,
   [SupportedChainId.GNOSIS_CHAIN]: process.env.REACT_APP_NETWORK_URL_100 || undefined,
   [SupportedChainId.ARBITRUM_ONE]: process.env.REACT_APP_NETWORK_URL_42161 || undefined,
+  [SupportedChainId.BASE]: process.env.REACT_APP_NETWORK_URL_8453 || undefined,
   [SupportedChainId.SEPOLIA]: process.env.REACT_APP_NETWORK_URL_11155111 || undefined,
 }
 
@@ -14,6 +15,7 @@ const DEFAULT_RPC_URL: Record<SupportedChainId, { url: string; usesInfura: boole
   [SupportedChainId.MAINNET]: { url: `https://mainnet.infura.io/v3/${INFURA_KEY}`, usesInfura: true },
   [SupportedChainId.GNOSIS_CHAIN]: { url: `https://rpc.gnosis.gateway.fm`, usesInfura: false },
   [SupportedChainId.ARBITRUM_ONE]: { url: `https://arbitrum-mainnet.infura.io/v3/${INFURA_KEY}`, usesInfura: true },
+  [SupportedChainId.BASE]: { url: `https://base-mainnet.infura.io/v3/${INFURA_KEY}`, usesInfura: true },
   [SupportedChainId.SEPOLIA]: { url: `https://sepolia.infura.io/v3/${INFURA_KEY}`, usesInfura: true },
 }
 
diff --git a/libs/common-const/src/tokens.ts b/libs/common-const/src/tokens.ts
index 3be829756a..cbd260cb32 100644
--- a/libs/common-const/src/tokens.ts
+++ b/libs/common-const/src/tokens.ts
@@ -41,7 +41,7 @@ export const DAI = new TokenWithLogo(
   'Dai Stablecoin',
 )
 
-const GNO_MAINNET = new TokenWithLogo(
+export const GNO_MAINNET = new TokenWithLogo(
   cowprotocolTokenLogoUrl('0x6810e776880c02933d47db1b9fc05908e5386b96', SupportedChainId.MAINNET),
   SupportedChainId.MAINNET,
   '0x6810e776880c02933d47db1b9fc05908e5386b96',
@@ -202,9 +202,100 @@ const MIM_ARBITRUM_ONE = new TokenWithLogo(
   'Magic Internet Money',
 )
 
+// Base
+
+export const USDT_BASE = new TokenWithLogo(
+  USDT.logoURI,
+  SupportedChainId.BASE,
+  '0xfde4C96c8593536E31F229EA8f37b2ADa2699bb2',
+  6,
+  'USDT',
+  'Tether USD',
+)
+export const CBBTC_BASE = new TokenWithLogo(
+  cowprotocolTokenLogoUrl('0xcbB7C0000aB88B473b1f5aFd9ef808440eed33Bf', SupportedChainId.BASE),
+  SupportedChainId.BASE,
+  '0xcbB7C0000aB88B473b1f5aFd9ef808440eed33Bf',
+  8,
+  'cbBTC',
+  'Coinbase Wrapped BTC',
+)
+
+export const USDC_BASE = new TokenWithLogo(
+  USDC_MAINNET.logoURI,
+  SupportedChainId.BASE,
+  '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913',
+  6,
+  'USDC',
+  'USD Coin',
+)
+
+export const DAI_BASE = new TokenWithLogo(
+  DAI.logoURI,
+  SupportedChainId.BASE,
+  '0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb',
+  18,
+  'DAI',
+  'Dai Stablecoin',
+)
+
+export const DOLA_BASE = new TokenWithLogo(
+  cowprotocolTokenLogoUrl('0x4621b7A9c75199271F773Ebd9A499dbd165c3191', SupportedChainId.BASE),
+  SupportedChainId.BASE,
+  '0x4621b7A9c75199271F773Ebd9A499dbd165c3191',
+  18,
+  'DOLA',
+  'Dola USD Stablecoin',
+)
+
+export const USDZ_BASE = new TokenWithLogo(
+  cowprotocolTokenLogoUrl('0x04d5ddf5f3a8939889f11e97f8c4bb48317f1938', SupportedChainId.BASE),
+  SupportedChainId.BASE,
+  '0x04d5ddf5f3a8939889f11e97f8c4bb48317f1938',
+  18,
+  'USDz',
+  'USDz',
+)
+
+export const EURC_BASE = new TokenWithLogo(
+  cowprotocolTokenLogoUrl('0x60a3e35cc302bfa44cb288bc5a4f316fdb1adb42', SupportedChainId.BASE),
+  SupportedChainId.BASE,
+  '0x60a3e35cc302bfa44cb288bc5a4f316fdb1adb42',
+  6,
+  'EURC',
+  'EURC',
+)
+
+export const CGUSD_BASE = new TokenWithLogo(
+  cowprotocolTokenLogoUrl('0xca72827a3d211cfd8f6b00ac98824872b72cab49', SupportedChainId.BASE),
+  SupportedChainId.BASE,
+  '0xca72827a3d211cfd8f6b00ac98824872b72cab49',
+  6,
+  'cgUSD',
+  'Cygnus Global USD',
+)
+
+export const USD_PLUS_BASE = new TokenWithLogo(
+  cowprotocolTokenLogoUrl('0xb79dd08ea68a908a97220c76d19a6aa9cbde4376', SupportedChainId.BASE),
+  SupportedChainId.BASE,
+  '0xb79dd08ea68a908a97220c76d19a6aa9cbde4376',
+  6,
+  'USD+',
+  'USD+',
+)
+
+export const EUSD_BASE = new TokenWithLogo(
+  cowprotocolTokenLogoUrl('0xcfa3ef56d303ae4faaba0592388f19d7c3399fb4', SupportedChainId.BASE),
+  SupportedChainId.BASE,
+  '0xcfa3ef56d303ae4faaba0592388f19d7c3399fb4',
+  18,
+  'eUSD',
+  'Electronic Dollar',
+)
+
 // Sepolia
 
-const GNO_SEPOLIA = new TokenWithLogo(
+export const GNO_SEPOLIA = new TokenWithLogo(
   GNO_MAINNET.logoURI,
   SupportedChainId.SEPOLIA,
   '0xd3f3d46FeBCD4CdAa2B83799b7A5CdcB69d135De',
@@ -227,6 +318,7 @@ export const USDC: Record<SupportedChainId, TokenWithLogo> = {
   [SupportedChainId.MAINNET]: USDC_MAINNET,
   [SupportedChainId.GNOSIS_CHAIN]: USDC_GNOSIS_CHAIN,
   [SupportedChainId.ARBITRUM_ONE]: USDC_ARBITRUM_ONE,
+  [SupportedChainId.BASE]: USDC_BASE,
   [SupportedChainId.SEPOLIA]: USDC_SEPOLIA,
 }
 
@@ -235,6 +327,7 @@ export const TOKEN_SHORTHANDS: { [shorthand: string]: Record<SupportedChainId, s
     [SupportedChainId.MAINNET]: USDC_MAINNET.address,
     [SupportedChainId.GNOSIS_CHAIN]: USDC_GNOSIS_CHAIN.address,
     [SupportedChainId.ARBITRUM_ONE]: USDC_ARBITRUM_ONE.address,
+    [SupportedChainId.BASE]: USDC_BASE.address,
     [SupportedChainId.SEPOLIA]: USDC_SEPOLIA.address,
   },
 }
@@ -269,11 +362,11 @@ const V_COW_TOKEN_SEPOLIA = new TokenWithLogo(
   'CoW Protocol Virtual Token',
 )
 
-// TODO: V_COW not present in all chains, make sure code using it can handle that
 export const V_COW: Record<SupportedChainId, TokenWithLogo | null> = {
   [SupportedChainId.MAINNET]: V_COW_TOKEN_MAINNET,
   [SupportedChainId.GNOSIS_CHAIN]: V_COW_TOKEN_XDAI,
   [SupportedChainId.ARBITRUM_ONE]: null,
+  [SupportedChainId.BASE]: null,
   [SupportedChainId.SEPOLIA]: V_COW_TOKEN_SEPOLIA,
 }
 
@@ -283,7 +376,7 @@ export const V_COW: Record<SupportedChainId, TokenWithLogo | null> = {
 const COW_TOKEN_MAINNET = new TokenWithLogo(
   undefined,
   SupportedChainId.MAINNET,
-  COW_CONTRACT_ADDRESS[SupportedChainId.MAINNET] || '',
+  COW_CONTRACT_ADDRESS[SupportedChainId.MAINNET],
   18,
   'COW',
   'CoW Protocol Token',
@@ -292,7 +385,7 @@ const COW_TOKEN_MAINNET = new TokenWithLogo(
 const COW_TOKEN_XDAI = new TokenWithLogo(
   COW_TOKEN_MAINNET.logoURI,
   SupportedChainId.GNOSIS_CHAIN,
-  COW_CONTRACT_ADDRESS[SupportedChainId.GNOSIS_CHAIN] || '',
+  COW_CONTRACT_ADDRESS[SupportedChainId.GNOSIS_CHAIN],
   18,
   'COW',
   'CoW Protocol Token',
@@ -301,7 +394,16 @@ const COW_TOKEN_XDAI = new TokenWithLogo(
 export const COW_TOKEN_ARBITRUM = new TokenWithLogo(
   COW_TOKEN_MAINNET.logoURI,
   SupportedChainId.ARBITRUM_ONE,
-  COW_CONTRACT_ADDRESS[SupportedChainId.ARBITRUM_ONE] || '',
+  COW_CONTRACT_ADDRESS[SupportedChainId.ARBITRUM_ONE],
+  18,
+  'COW',
+  'CoW Protocol Token',
+)
+
+export const COW_TOKEN_BASE = new TokenWithLogo(
+  COW_TOKEN_MAINNET.logoURI,
+  SupportedChainId.BASE,
+  COW_CONTRACT_ADDRESS[SupportedChainId.BASE],
   18,
   'COW',
   'CoW Protocol Token',
@@ -310,7 +412,7 @@ export const COW_TOKEN_ARBITRUM = new TokenWithLogo(
 const COW_TOKEN_SEPOLIA = new TokenWithLogo(
   COW_TOKEN_MAINNET.logoURI,
   SupportedChainId.SEPOLIA,
-  COW_CONTRACT_ADDRESS[SupportedChainId.SEPOLIA] || '',
+  COW_CONTRACT_ADDRESS[SupportedChainId.SEPOLIA],
   18,
   'COW',
   'CoW Protocol Token',
@@ -320,19 +422,24 @@ export const COW: Record<SupportedChainId, TokenWithLogo> = {
   [SupportedChainId.MAINNET]: COW_TOKEN_MAINNET,
   [SupportedChainId.GNOSIS_CHAIN]: COW_TOKEN_XDAI,
   [SupportedChainId.ARBITRUM_ONE]: COW_TOKEN_ARBITRUM,
+  [SupportedChainId.BASE]: COW_TOKEN_BASE,
   [SupportedChainId.SEPOLIA]: COW_TOKEN_SEPOLIA,
 }
 
-export const GNO: Record<SupportedChainId, TokenWithLogo> = {
+export const GNO: Record<SupportedChainId, TokenWithLogo | null> = {
   [SupportedChainId.MAINNET]: GNO_MAINNET,
   [SupportedChainId.GNOSIS_CHAIN]: GNO_GNOSIS_CHAIN,
   [SupportedChainId.ARBITRUM_ONE]: GNO_ARBITRUM_ONE,
+  [SupportedChainId.BASE]: null,
   [SupportedChainId.SEPOLIA]: GNO_SEPOLIA,
 }
 
 const SDAI_GNOSIS_CHAIN_ADDRESS = '0xaf204776c7245bf4147c2612bf6e5972ee483701'
 const GBPE_GNOSIS_CHAIN_ADDRESS = '0x5cb9073902f2035222b9749f8fb0c9bfe5527108'
 
+// Not used for fees
+const MAINNET_STABLECOINS = [USDC_MAINNET.address, USDT.address, DAI.address].map((t) => t.toLowerCase())
+
 // NOTE: whenever this list is updated, make sure to update the docs section regarding the volume fees
 // https://github.com/cowprotocol/docs/blob/main/docs/governance/fees/fees.md?plain=1#L40
 const GNOSIS_CHAIN_STABLECOINS = [
@@ -356,11 +463,24 @@ const ARBITRUM_ONE_STABLECOINS = [
   MIM_ARBITRUM_ONE.address,
 ].map((t) => t.toLowerCase())
 
+// Not used for fees
+const BASE_STABLECOINS = [
+  USDC_BASE.address,
+  DAI_BASE.address,
+  DOLA_BASE.address,
+  USDZ_BASE.address,
+  EURC_BASE.address,
+  CGUSD_BASE.address,
+  USD_PLUS_BASE.address,
+  EUSD_BASE.address,
+].map((t) => t.toLowerCase())
+
 export const STABLECOINS: Record<ChainId, Set<string>> = {
-  [SupportedChainId.MAINNET]: new Set(),
+  [SupportedChainId.MAINNET]: new Set(MAINNET_STABLECOINS),
   [SupportedChainId.GNOSIS_CHAIN]: new Set(GNOSIS_CHAIN_STABLECOINS),
   [SupportedChainId.ARBITRUM_ONE]: new Set(ARBITRUM_ONE_STABLECOINS),
-  [SupportedChainId.SEPOLIA]: new Set(),
+  [SupportedChainId.SEPOLIA]: new Set([USDC_SEPOLIA.address]),
+  [SupportedChainId.BASE]: new Set(BASE_STABLECOINS),
 }
 
 /**
@@ -371,6 +491,7 @@ export const MERKLE_DROP_CONTRACT_ADDRESSES: Record<SupportedChainId, string> =
   [SupportedChainId.MAINNET]: '0x64646f112FfD6F1B7533359CFaAF7998F23C8c40',
   [SupportedChainId.GNOSIS_CHAIN]: '0x48D8566887F8c7d99757CE29c2cD39962bfd9547',
   [SupportedChainId.ARBITRUM_ONE]: '', // doesn't exist
+  [SupportedChainId.BASE]: '', // doesn't exist
   [SupportedChainId.SEPOLIA]: '', // TODO SEPOLIA: check it
 }
 
@@ -378,5 +499,6 @@ export const TOKEN_DISTRO_CONTRACT_ADDRESSES: Record<SupportedChainId, string> =
   [SupportedChainId.MAINNET]: '0x68FFAaC7A431f276fe73604C127Bd78E49070c92',
   [SupportedChainId.GNOSIS_CHAIN]: '0x3d610e917130f9D036e85A030596807f57e11093',
   [SupportedChainId.ARBITRUM_ONE]: '', // doesn't exist
+  [SupportedChainId.BASE]: '', // doesn't exist
   [SupportedChainId.SEPOLIA]: '', // TODO SEPOLIA: check it
 }
diff --git a/libs/common-hooks/src/useAvailableChains.ts b/libs/common-hooks/src/useAvailableChains.ts
index 1a7892ba50..4e7c610179 100644
--- a/libs/common-hooks/src/useAvailableChains.ts
+++ b/libs/common-hooks/src/useAvailableChains.ts
@@ -3,6 +3,8 @@ import { useMemo } from 'react'
 import { getAvailableChains } from '@cowprotocol/common-utils'
 import { SupportedChainId } from '@cowprotocol/cow-sdk'
 
+import { useFeatureFlags } from './useFeatureFlags'
+
 /**
  * Hook to get a list of SupportedChainId currently available/enabled
  *
@@ -12,12 +14,12 @@ import { SupportedChainId } from '@cowprotocol/cow-sdk'
  */
 export function useAvailableChains(): SupportedChainId[] {
   // 1. Load feature flag for chain being enabled
-  // const { isArbitrumOneEnabled } = useFeatureFlags()
+  const { isBaseEnabled } = useFeatureFlags()
 
   return useMemo(
     // 2. Conditionally build a list of chain ids to exclude
     // () => getAvailableChains(isArbitrumOneEnabled ? undefined : [SupportedChainId.ARBITRUM_ONE]),
-    () => getAvailableChains(),
-    []
+    () => getAvailableChains(isBaseEnabled ? undefined : [SupportedChainId.BASE]),
+    [isBaseEnabled],
   )
 }
diff --git a/libs/common-utils/src/explorer.ts b/libs/common-utils/src/explorer.ts
index 964be02886..f18a55c375 100644
--- a/libs/common-utils/src/explorer.ts
+++ b/libs/common-utils/src/explorer.ts
@@ -19,6 +19,7 @@ function _getExplorerUrlByEnvironment(): Record<ChainId, string> {
     [ChainId.MAINNET]: baseUrl,
     [ChainId.GNOSIS_CHAIN]: `${baseUrl}/gc`,
     [ChainId.ARBITRUM_ONE]: `${baseUrl}/arb1`,
+    [ChainId.BASE]: `${baseUrl}/base`,
     [ChainId.SEPOLIA]: `${baseUrl}/sepolia`,
   }
 }
diff --git a/libs/core/src/gnosisSafe/index.ts b/libs/core/src/gnosisSafe/index.ts
index b9819ddc32..78e0c71f9d 100644
--- a/libs/core/src/gnosisSafe/index.ts
+++ b/libs/core/src/gnosisSafe/index.ts
@@ -12,6 +12,7 @@ const SAFE_TRANSACTION_SERVICE_URL: Record<SupportedChainId, string> = {
   [SupportedChainId.MAINNET]: 'https://safe-transaction-mainnet.safe.global',
   [SupportedChainId.GNOSIS_CHAIN]: 'https://safe-transaction-gnosis-chain.safe.global',
   [SupportedChainId.ARBITRUM_ONE]: 'https://safe-transaction-arbitrum.safe.global',
+  [SupportedChainId.BASE]: 'https://safe-transaction-base.safe.global',
   [SupportedChainId.SEPOLIA]: 'https://safe-transaction-sepolia.safe.global',
 }
 
@@ -77,7 +78,7 @@ export function getSafeWebUrl(chainId: SupportedChainId, safeAddress: string, sa
 export function getSafeTransaction(
   chainId: number,
   safeTxHash: string,
-  library: Web3Provider
+  library: Web3Provider,
 ): Promise<SafeMultisigTransactionResponse> {
   console.log('[api/gnosisSafe] getSafeTransaction', chainId, safeTxHash)
   const client = _getClientOrThrow(chainId, library)
diff --git a/libs/ens/src/hooks/useENSRegistrarContract.ts b/libs/ens/src/hooks/useENSRegistrarContract.ts
index 143427f970..9bd397e607 100644
--- a/libs/ens/src/hooks/useENSRegistrarContract.ts
+++ b/libs/ens/src/hooks/useENSRegistrarContract.ts
@@ -11,6 +11,8 @@ const ENS_REGISTRAR_ADDRESSES: Record<SupportedChainId, string | null> = {
   [SupportedChainId.GNOSIS_CHAIN]: null,
   [SupportedChainId.SEPOLIA]: '0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e',
   [SupportedChainId.ARBITRUM_ONE]: null,
+  [SupportedChainId.BASE]: null,
+  // TODO: use mainnet registrar for all chains https://docs.ens.domains/learn/deployments, which means being connected to mainnet additionally to the other chain
 }
 
 export function useENSRegistrarContract(): EnsRegistrar | undefined {
@@ -26,7 +28,7 @@ export function useENSRegistrarContract(): EnsRegistrar | undefined {
 
       return getContract(address, EnsAbi, _provider) as EnsRegistrar
     },
-    SWR_NO_REFRESH_OPTIONS
+    SWR_NO_REFRESH_OPTIONS,
   )
 
   return data
diff --git a/libs/permit-utils/package.json b/libs/permit-utils/package.json
index 7bbeb4ac5a..031b404f16 100644
--- a/libs/permit-utils/package.json
+++ b/libs/permit-utils/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cowprotocol/permit-utils",
-  "version": "0.4.0",
+  "version": "0.5.0-RC.0",
   "type": "module",
   "dependencies": {
     "ethers": "^5.7.2",
@@ -16,4 +16,4 @@
       "require": "./index.cjs"
     }
   }
-}
+}
\ No newline at end of file
diff --git a/libs/tokens/src/const/defaultFavoriteTokens.ts b/libs/tokens/src/const/defaultFavoriteTokens.ts
index bb51e1ca79..61c54335cc 100644
--- a/libs/tokens/src/const/defaultFavoriteTokens.ts
+++ b/libs/tokens/src/const/defaultFavoriteTokens.ts
@@ -1,18 +1,23 @@
 import {
   ARB_ARBITRUM_ONE,
+  CBBTC_BASE,
   COW,
   COW_TOKEN_ARBITRUM,
+  COW_TOKEN_BASE,
   DAI,
   DAI_ARBITRUM_ONE,
+  DAI_BASE,
   EURE_GNOSIS_CHAIN,
   GNO_GNOSIS_CHAIN,
   TokenWithLogo,
   USDC_ARBITRUM_ONE,
+  USDC_BASE,
   USDC_MAINNET,
   USDC_SEPOLIA,
   USDCe_GNOSIS_CHAIN,
   USDT,
   USDT_ARBITRUM_ONE,
+  USDT_BASE,
   WBTC,
   WBTC_ARBITRUM_ONE,
   WBTC_GNOSIS_CHAIN,
@@ -63,6 +68,14 @@ export const DEFAULT_FAVORITE_TOKENS: Record<SupportedChainId, TokensMap> = {
     ARB_ARBITRUM_ONE,
     COW_TOKEN_ARBITRUM,
   ]),
+  [SupportedChainId.BASE]: tokensListToMap([
+    USDC_BASE,
+    USDT_BASE,
+    WRAPPED_NATIVE_CURRENCIES[SupportedChainId.BASE],
+    CBBTC_BASE,
+    DAI_BASE,
+    COW_TOKEN_BASE,
+  ]),
   [SupportedChainId.SEPOLIA]: tokensListToMap([
     WRAPPED_NATIVE_CURRENCIES[SupportedChainId.SEPOLIA],
     COW[SupportedChainId.SEPOLIA],
diff --git a/libs/tokens/src/const/tokensList.json b/libs/tokens/src/const/tokensList.json
index 9789cd9fb9..05c6635226 100644
--- a/libs/tokens/src/const/tokensList.json
+++ b/libs/tokens/src/const/tokensList.json
@@ -112,5 +112,16 @@
       "enabledByDefault": true,
       "source": "https://raw.githubusercontent.com/cowprotocol/token-lists/main/src/public/CowSwapSepolia.json"
     }
+  ],
+  "8453": [
+    {
+      "priority": 1,
+      "enabledByDefault": true,
+      "source": "https://files.cow.fi/tokens/CowSwap.json"
+    },
+    {
+      "priority": 2,
+      "source": "https://tokens.coingecko.com/base/all.json"
+    }
   ]
 }
diff --git a/libs/tokens/src/const/tokensLists.ts b/libs/tokens/src/const/tokensLists.ts
index b5fc521b9f..138aab9db3 100644
--- a/libs/tokens/src/const/tokensLists.ts
+++ b/libs/tokens/src/const/tokensLists.ts
@@ -13,6 +13,3 @@ export const UNISWAP_TOKENS_LIST = 'https://ipfs.io/ipns/tokens.uniswap.org'
 
 export const GNOSIS_UNISWAP_TOKENS_LIST =
   'https://raw.githubusercontent.com/cowprotocol/token-lists/main/src/public/GnosisUniswapTokensList.json'
-
-export const ARBITRUM_ONE_TOKENS_LIST =
-  'https://raw.githubusercontent.com/cowprotocol/token-lists/main/src/public/ArbitrumOneUniswapTokensList.json'
diff --git a/libs/tokens/src/services/searchTokensInApi.ts b/libs/tokens/src/services/searchTokensInApi.ts
index 9b49250caa..9eac6b952e 100644
--- a/libs/tokens/src/services/searchTokensInApi.ts
+++ b/libs/tokens/src/services/searchTokensInApi.ts
@@ -5,7 +5,16 @@ import { gql, GraphQLClient } from 'graphql-request'
 
 type Address = `0x${string}`
 
-type Chain = 'ARBITRUM' | 'ETHEREUM' | 'ETHEREUM_SEPOLIA' | 'OPTIMISM' | 'POLYGON' | 'CELO' | 'BNB' | 'UNKNOWN_CHAIN'
+type Chain =
+  | 'ARBITRUM'
+  | 'ETHEREUM'
+  | 'ETHEREUM_SEPOLIA'
+  | 'OPTIMISM'
+  | 'POLYGON'
+  | 'CELO'
+  | 'BNB'
+  | 'BASE'
+  | 'UNKNOWN_CHAIN'
 
 interface FetchTokensResult {
   id: string
@@ -115,21 +124,25 @@ const GQL_CLIENT = new GraphQLClient(BASE_URL)
 const CHAIN_NAMES: Record<SupportedChainId, Chain | null> = {
   [SupportedChainId.MAINNET]: 'ETHEREUM',
   [SupportedChainId.ARBITRUM_ONE]: 'ARBITRUM',
-  [SupportedChainId.SEPOLIA]: null,
+  [SupportedChainId.BASE]: 'BASE',
+  [SupportedChainId.SEPOLIA]: 'ETHEREUM_SEPOLIA',
   [SupportedChainId.GNOSIS_CHAIN]: null,
 }
 
-const CHAIN_IDS = Object.entries(CHAIN_NAMES).reduce((acc, [supportedChainId, chain]) => {
-  if (chain) {
-    acc[chain] = parseInt(supportedChainId)
-  }
+const CHAIN_IDS = Object.entries(CHAIN_NAMES).reduce(
+  (acc, [supportedChainId, chain]) => {
+    if (chain) {
+      acc[chain] = parseInt(supportedChainId)
+    }
 
-  return acc
-}, {} as Record<Chain, SupportedChainId>)
+    return acc
+  },
+  {} as Record<Chain, SupportedChainId>,
+)
 
 export async function searchTokensInApi(
   chainId: SupportedChainId,
-  searchQuery: string
+  searchQuery: string,
 ): Promise<TokenSearchFromApiResult[]> {
   const chain = CHAIN_NAMES[chainId]
 
diff --git a/libs/tokens/src/state/tokenLists/tokenListsStateAtom.ts b/libs/tokens/src/state/tokenLists/tokenListsStateAtom.ts
index f9616bebc6..77bf475d43 100644
--- a/libs/tokens/src/state/tokenLists/tokenListsStateAtom.ts
+++ b/libs/tokens/src/state/tokenLists/tokenListsStateAtom.ts
@@ -5,7 +5,6 @@ import { getJotaiMergerStorage } from '@cowprotocol/core'
 import { mapSupportedNetworks, SupportedChainId } from '@cowprotocol/cow-sdk'
 
 import {
-  ARBITRUM_ONE_TOKENS_LIST,
   DEFAULT_TOKENS_LISTS,
   GNOSIS_UNISWAP_TOKENS_LIST,
   LP_TOKEN_LISTS,
@@ -23,7 +22,8 @@ import { environmentAtom } from '../environmentAtom'
 const UNISWAP_TOKEN_LIST_URL: Record<SupportedChainId, string> = {
   [SupportedChainId.MAINNET]: UNISWAP_TOKENS_LIST,
   [SupportedChainId.GNOSIS_CHAIN]: GNOSIS_UNISWAP_TOKENS_LIST,
-  [SupportedChainId.ARBITRUM_ONE]: ARBITRUM_ONE_TOKENS_LIST,
+  [SupportedChainId.ARBITRUM_ONE]: UNISWAP_TOKENS_LIST,
+  [SupportedChainId.BASE]: UNISWAP_TOKENS_LIST,
   [SupportedChainId.SEPOLIA]: UNISWAP_TOKENS_LIST,
 }
 
diff --git a/libs/tokens/src/utils/trustTokenLogoUrl.ts b/libs/tokens/src/utils/trustTokenLogoUrl.ts
index 86eeb9eb8c..ccc150ee8b 100644
--- a/libs/tokens/src/utils/trustTokenLogoUrl.ts
+++ b/libs/tokens/src/utils/trustTokenLogoUrl.ts
@@ -4,6 +4,7 @@ const chainIdToName: Record<SupportedChainId, string> = {
   [SupportedChainId.MAINNET]: 'ethereum',
   [SupportedChainId.GNOSIS_CHAIN]: 'xdai',
   [SupportedChainId.ARBITRUM_ONE]: 'arbitrum',
+  [SupportedChainId.BASE]: 'base',
   [SupportedChainId.SEPOLIA]: 'ethereum',
 }
 
diff --git a/libs/wallet/src/web3-react/utils/switchChain.ts b/libs/wallet/src/web3-react/utils/switchChain.ts
index 28e8320fe5..dbbadbe820 100644
--- a/libs/wallet/src/web3-react/utils/switchChain.ts
+++ b/libs/wallet/src/web3-react/utils/switchChain.ts
@@ -18,6 +18,7 @@ const WALLET_RPC_SUGGESTION: Record<SupportedChainId, string | null> = {
   [SupportedChainId.MAINNET]: null,
   [SupportedChainId.GNOSIS_CHAIN]: 'https://rpc.gnosischain.com/',
   [SupportedChainId.ARBITRUM_ONE]: 'https://arb1.arbitrum.io/rpc',
+  [SupportedChainId.BASE]: 'https://mainnet.base.org',
   [SupportedChainId.SEPOLIA]: null,
 }
 
diff --git a/package.json b/package.json
index aa2dc9f855..5c8bb41c8e 100644
--- a/package.json
+++ b/package.json
@@ -71,7 +71,7 @@
     "@cowprotocol/cms": "^0.6.0",
     "@cowprotocol/contracts": "^1.3.1",
     "@cowprotocol/cow-runner-game": "^0.2.9",
-    "@cowprotocol/cow-sdk": "^5.5.1",
+    "@cowprotocol/cow-sdk": "^5.7.1",
     "@cowprotocol/ethflowcontract": "cowprotocol/ethflowcontract.git#main-artifacts",
     "@davatar/react": "1.8.1",
     "@emotion/react": "^11.11.1",
@@ -339,4 +339,4 @@
     "vite-tsconfig-paths": "~4.3.2",
     "vitest": "~0.32.0"
   }
-}
+}
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
index e4bd823e29..96c6bbb17d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2429,10 +2429,10 @@
   resolved "https://registry.yarnpkg.com/@cowprotocol/cow-runner-game/-/cow-runner-game-0.2.9.tgz#3f94b3f370bd114f77db8b1d238cba3ef4e9d644"
   integrity sha512-rX7HnoV+HYEEkBaqVUsAkGGo0oBrExi+d6Io+8nQZYwZk+IYLmS9jdcIObsLviM2h4YX8+iin6NuKl35AaiHmg==
 
-"@cowprotocol/cow-sdk@^5.5.1":
-  version "5.5.1"
-  resolved "https://registry.yarnpkg.com/@cowprotocol/cow-sdk/-/cow-sdk-5.5.1.tgz#7bb4627c56958e8c438d08c10f7bdb3a89dc3c2f"
-  integrity sha512-FFc9pj8xhsfGZ1vjw+4IFGb6UTdPzuOoZOvM/OhZlrfy15ohfSSb2urbHWASvKjbcXeg6KqL4aHS6KEw+BYnmA==
+"@cowprotocol/cow-sdk@^5.7.1":
+  version "5.7.1"
+  resolved "https://registry.yarnpkg.com/@cowprotocol/cow-sdk/-/cow-sdk-5.7.1.tgz#22b556b79c949a3c5a65ee87f188a477f29d76eb"
+  integrity sha512-1SKzf6hqLEUP3if+Ki6eweSWcUA7hDyFcmUW2tf6a0XROwl9ktNHWP7dJ09zMrnFn6k03DqoYvKun1i+WS1D7Q==
   dependencies:
     "@cowprotocol/contracts" "^1.6.0"
     "@ethersproject/abstract-signer" "^5.7.0"
@@ -2444,8 +2444,8 @@
     limiter "^2.1.0"
 
 "@cowprotocol/ethflowcontract@cowprotocol/ethflowcontract.git#main-artifacts":
-  version "1.2.0"
-  resolved "https://codeload.github.com/cowprotocol/ethflowcontract/tar.gz/0163ee489587fb7f2cbabcab9d566ebc4ec189f5"
+  version "1.3.0"
+  resolved "https://codeload.github.com/cowprotocol/ethflowcontract/tar.gz/ed75d811aba0e18aa80e949cbc979d34ab7fd9ee"
 
 "@cspotcode/source-map-support@^0.8.0":
   version "0.8.1"