feat(token lists): implement the uniswap default list as a token list (#983)

* load tokens from url `useTokenList`

* improve performance of the loading

* move the loading to redux and save loaded lists

* lint error

* move the list fetching code to a separate component

* change how token lists are fetched to use the updater and add unit tests

* fix a crash with currencyEquals

* bump sdk version

* token lists should automatically update for minor/patch changes

* nit

* show popups for list updates

* support pointing at localhost

* spuport ipfs/ipns logos

* use the updater to bump list versions

* save the old/new list in the popup for viewing diffs

* improve the list popup

* fix linter error, make sure visibility checking is working

* show list update notifications

* address a couple metamask warnings, linter error

* fix the custom added/default tokens

* refactor some popup stuff to reuse the fader

* linter error

* Revert: refactor some popup stuff to reuse the fader (a7b0f752)

* style improvements, linter

* add to the readme, drop the token-request template

* back to the beta that works with wallet connect

* get the dependencies to a state that works with wallet connect and passes integration tests

.github/ISSUE_TEMPLATE/token-request.md

----
-name: Token Request
-about: Request a token addition
-title: ''
-labels: token request
-assignees: ''
-
----
-
-**Please provide the following information for your token.**
-
-Token Address: 
-Token Name (from contract): 
-Token Decimals (from contract): 
-Token Symbol (from contract): 
-Uniswap Exchange Address of Token: 
-
-Link to the official homepage of token:
-Link to CoinMarketCap or CoinGecko page of token:
-
-Some tokens (e.g. BNB) do not work with Uniswap v1. In order to assess if your token works correctly, please complete small-value transactions of each of the types below, and submit the Etherscan transaction links for our review.
-Test `addLiquidity` transaction: 
-Test `swap` transaction: 
-Test `removeLiquidity` transaction: 
-
-Are you willing to add liquidity to the liquidity pool for this token? (Y/N): 
-If so, how much liquidity are you willing to add?: 

README.md

@@ -20,6 +20,12 @@ To access the Uniswap Interface, use an IPFS gateway link from the
 [latest release](https://github.com/Uniswap/uniswap-interface/releases/latest), 
 or visit [app.uniswap.org](https://app.uniswap.org).
 
+## Listing a token
+
+Please see the
+[@uniswap/default-token-list](https://github.com/uniswap/default-token-list) 
+repository.
+
 ## Development
 
 ### Install Dependencies

package.json

@@ -4,15 +4,17 @@
   "homepage": ".",
   "private": true,
   "devDependencies": {
-    "@ethersproject/address": "^5.0.1",
-    "@ethersproject/bignumber": "^5.0.3",
-    "@ethersproject/constants": "^5.0.1",
-    "@ethersproject/contracts": "^5.0.1",
-    "@ethersproject/experimental": "^5.0.0",
-    "@ethersproject/providers": "^5.0.4",
-    "@ethersproject/strings": "^5.0.1",
-    "@ethersproject/units": "^5.0.1",
-    "@ethersproject/wallet": "^5.0.1",
+    "@ethersproject/address": "5.0.0-beta.134",
+    "@ethersproject/bignumber": "5.0.0-beta.138",
+    "@ethersproject/constants": "5.0.0-beta.133",
+    "@ethersproject/contracts": "5.0.0-beta.151",
+    "@ethersproject/experimental": "5.0.0-beta.141",
+    "@ethersproject/networks": "5.0.0-beta.136",
+    "@ethersproject/providers": "5.0.0-beta.162",
+    "@ethersproject/solidity": "5.0.2",
+    "@ethersproject/strings": "5.0.0-beta.136",
+    "@ethersproject/units": "5.0.0-beta.132",
+    "@ethersproject/wallet": "5.0.0-beta.141",
     "@popperjs/core": "^2.4.4",
     "@reach/dialog": "^0.10.3",
     "@reach/portal": "^0.10.3",
@@ -31,7 +33,8 @@
     "@types/testing-library__cypress": "^5.0.5",
     "@typescript-eslint/eslint-plugin": "^2.31.0",
     "@typescript-eslint/parser": "^2.31.0",
-    "@uniswap/sdk": "3.0.1",
+    "@uniswap/sdk": "3.0.3-beta.1",
+    "@uniswap/token-lists": "^1.0.0-beta.9",
     "@uniswap/v2-core": "1.0.0",
     "@uniswap/v2-periphery": "^1.1.0-beta.0",
     "@web3-react/core": "^6.0.9",
@@ -40,6 +43,7 @@
     "@web3-react/portis-connector": "^6.0.9",
     "@web3-react/walletconnect-connector": "^6.1.1",
     "@web3-react/walletlink-connector": "^6.0.9",
+    "ajv": "^6.12.3",
     "copy-to-clipboard": "^3.2.0",
     "cross-env": "^7.0.2",
     "cypress": "^4.5.0",

src/components/CurrencyLogo/index.tsx

+import { Currency, ETHER, Token } from '@uniswap/sdk'
 import React, { useState } from 'react'
 import styled from 'styled-components'
-import { Currency, Token } from '@uniswap/sdk'
 
 import EthereumLogo from '../../assets/images/ethereum-logo.png'
+import { WrappedTokenInfo } from '../../state/lists/hooks'
+import uriToHttp from '../../utils/uriToHttp'
 
 const getTokenLogoURL = address =>
   `https://raw.githubusercontent.com/trustwallet/assets/master/blockchains/ethereum/assets/${address}/logo.png`
-const NO_LOGO_ADDRESSES: { [tokenAddress: string]: true } = {}
+const BAD_URIS: { [tokenAddress: string]: true } = {}
 
 const Image = styled.img<{ size: string }>`
   width: ${({ size }) => size};
@@ -44,35 +46,49 @@ export default function CurrencyLogo({
 }) {
   const [, refresh] = useState<number>(0)
 
+  if (currency === ETHER) {
+    return <StyledEthereumLogo src={EthereumLogo} size={size} {...rest} />
+  }
+
   if (currency instanceof Token) {
-    let path = ''
-    if (!NO_LOGO_ADDRESSES[currency.address]) {
-      path = getTokenLogoURL(currency.address)
-    } else {
+    let uri: string | undefined
+
+    if (currency instanceof WrappedTokenInfo) {
+      if (currency.logoURI && !BAD_URIS[currency.logoURI]) {
+        uri = uriToHttp(currency.logoURI).filter(s => !BAD_URIS[s])[0]
+      }
+    }
+
+    if (!uri) {
+      const defaultUri = getTokenLogoURL(currency.address)
+      if (!BAD_URIS[defaultUri]) {
+        uri = defaultUri
+      }
+    }
+
+    if (uri) {
       return (
-        <Emoji {...rest} size={size}>
-          <span role="img" aria-label="Thinking">
-            🤔
-          </span>
-        </Emoji>
+        <Image
+          {...rest}
+          alt={`${currency.name} Logo`}
+          src={uri}
+          size={size}
+          onError={() => {
+            if (currency instanceof Token) {
+              BAD_URIS[uri] = true
+            }
+            refresh(i => i + 1)
+          }}
+        />
       )
     }
-
-    return (
-      <Image
-        {...rest}
-        alt={`${currency.name} Logo`}
-        src={path}
-        size={size}
-        onError={() => {
-          if (currency instanceof Token) {
-            NO_LOGO_ADDRESSES[currency.address] = true
-          }
-          refresh(i => i + 1)
-        }}
-      />
-    )
-  } else {
-    return <StyledEthereumLogo src={EthereumLogo} size={size} {...rest} />
   }
+
+  return (
+    <Emoji {...rest} size={size}>
+      <span role="img" aria-label="Thinking">
+        🤔
+      </span>
+    </Emoji>
+  )
 }

src/components/Popups/ListUpdatePopup.tsx

+import { TokenList, Version } from '@uniswap/token-lists'
+import React, { useCallback, useContext } from 'react'
+import { AlertCircle, Info } from 'react-feather'
+import { useDispatch } from 'react-redux'
+import { ThemeContext } from 'styled-components'
+import { AppDispatch } from '../../state'
+import { useRemovePopup } from '../../state/application/hooks'
+import { acceptListUpdate } from '../../state/lists/actions'
+import { TYPE } from '../../theme'
+import { ButtonPrimary, ButtonSecondary } from '../Button'
+import { AutoColumn } from '../Column'
+import { AutoRow } from '../Row'
+
+function versionLabel(version: Version): string {
+  return `v${version.major}.${version.minor}.${version.patch}`
+}
+
+export default function ListUpdatePopup({
+  popKey,
+  listUrl,
+  oldList,
+  newList,
+  auto
+}: {
+  popKey: string
+  listUrl: string
+  oldList: TokenList
+  newList: TokenList
+  auto: boolean
+}) {
+  const removePopup = useRemovePopup()
+  const removeThisPopup = useCallback(() => removePopup(popKey), [popKey, removePopup])
+  const dispatch = useDispatch<AppDispatch>()
+  const theme = useContext(ThemeContext)
+
+  const updateList = useCallback(() => {
+    if (auto) return
+    dispatch(acceptListUpdate(listUrl))
+    removeThisPopup()
+  }, [auto, dispatch, listUrl, removeThisPopup])
+
+  return (
+    <AutoRow>
+      <div style={{ paddingRight: 16 }}>
+        {auto ? <Info color={theme.text2} size={24} /> : <AlertCircle color={theme.red1} size={24} />}{' '}
+      </div>
+      <AutoColumn style={{ flex: '1' }} gap="8px">
+        {auto ? (
+          <TYPE.body fontWeight={500}>
+            The token list &quot;{oldList.name}&quot; has been updated to{' '}
+            <strong>{versionLabel(newList.version)}</strong>.
+          </TYPE.body>
+        ) : (
+          <>
+            <div>
+              A token list update is available for the list &quot;{oldList.name}&quot; ({versionLabel(oldList.version)}{' '}
+              to {versionLabel(newList.version)}).
+            </div>
+            <AutoRow>
+              <div style={{ flexGrow: 1, marginRight: 6 }}>
+                <ButtonPrimary onClick={updateList}>Update list</ButtonPrimary>
+              </div>
+              <div style={{ flexGrow: 1 }}>
+                <ButtonSecondary onClick={removeThisPopup}>Dismiss</ButtonSecondary>
+              </div>
+            </AutoRow>
+          </>
+        )}
+      </AutoColumn>
+    </AutoRow>
+  )
+}

src/components/TxnPopup/index.tsx → src/components/Popups/PopupItem.tsx

 import React, { useCallback, useContext, useState } from 'react'
-import { AlertCircle, CheckCircle } from 'react-feather'
-
+import { X } from 'react-feather'
 import styled, { ThemeContext } from 'styled-components'
-
-import { useActiveWeb3React } from '../../hooks'
 import useInterval from '../../hooks/useInterval'
+import { PopupContent } from '../../state/application/actions'
 import { useRemovePopup } from '../../state/application/hooks'
-import { TYPE } from '../../theme'
+import ListUpdatePopup from './ListUpdatePopup'
+import TxnPopup from './TxnPopup'
 
-import { ExternalLink } from '../../theme/components'
-import { getEtherscanLink } from '../../utils'
-import { AutoColumn } from '../Column'
-import { AutoRow } from '../Row'
+export const StyledClose = styled(X)`
+  position: absolute;
+  right: 10px;
+  top: 10px;
+
+  :hover {
+    cursor: pointer;
+  }
+`
+export const Popup = styled.div`
+  display: inline-block;
+  width: 100%;
+  padding: 1em;
+  background-color: ${({ theme }) => theme.bg1};
+  position: relative;
+  border-radius: 10px;
+  padding: 20px;
+  padding-right: 35px;
+  z-index: 2;
+  overflow: hidden;
 
+  ${({ theme }) => theme.mediaWidth.upToSmall`
+    min-width: 290px;
+  `}
+`
+const DELAY = 100
 const Fader = styled.div<{ count: number }>`
   position: absolute;
   bottom: 0px;
@@ -23,20 +43,7 @@ const Fader = styled.div<{ count: number }>`
   transition: width 100ms linear;
 `
 
-const delay = 100
-
-export default function TxnPopup({
-  hash,
-  success,
-  summary,
-  popKey
-}: {
-  hash: string
-  success?: boolean
-  summary?: string
-  popKey?: string
-}) {
-  const { chainId } = useActiveWeb3React()
+export default function PopupItem({ content, popKey }: { content: PopupContent; popKey: string }) {
   const [count, setCount] = useState(1)
 
   const [isRunning, setIsRunning] = useState(true)
@@ -48,24 +55,32 @@ export default function TxnPopup({
     () => {
       count > 150 ? removeThisPopup() : setCount(count + 1)
     },
-    isRunning ? delay : null
+    isRunning ? DELAY : null
   )
 
+  const theme = useContext(ThemeContext)
+
   const handleMouseEnter = useCallback(() => setIsRunning(false), [])
   const handleMouseLeave = useCallback(() => setIsRunning(true), [])
 
-  const theme = useContext(ThemeContext)
+  let popupContent
+  if ('txn' in content) {
+    const {
+      txn: { hash, success, summary }
+    } = content
+    popupContent = <TxnPopup hash={hash} success={success} summary={summary} />
+  } else if ('listUpdate' in content) {
+    const {
+      listUpdate: { listUrl, oldList, newList, auto }
+    } = content
+    popupContent = <ListUpdatePopup popKey={popKey} listUrl={listUrl} oldList={oldList} newList={newList} auto={auto} />
+  }
 
   return (
-    <AutoRow onMouseEnter={handleMouseEnter} onMouseLeave={handleMouseLeave}>
-      <div style={{ paddingRight: 16 }}>
-        {success ? <CheckCircle color={theme.green1} size={24} /> : <AlertCircle color={theme.red1} size={24} />}
-      </div>
-      <AutoColumn gap="8px">
-        <TYPE.body fontWeight={500}>{summary ?? 'Hash: ' + hash.slice(0, 8) + '...' + hash.slice(58, 65)}</TYPE.body>
-        <ExternalLink href={getEtherscanLink(chainId, hash, 'transaction')}>View on Etherscan</ExternalLink>
-      </AutoColumn>
+    <Popup onMouseEnter={handleMouseEnter} onMouseLeave={handleMouseLeave}>
+      <StyledClose color={theme.text2} onClick={() => removePopup(popKey)} />
+      {popupContent}
       <Fader count={count} />
-    </AutoRow>
+    </Popup>
   )
 }

src/components/Popups/TxnPopup.tsx

+import React, { useContext } from 'react'
+import { AlertCircle, CheckCircle } from 'react-feather'
+import { ThemeContext } from 'styled-components'
+import { useActiveWeb3React } from '../../hooks'
+import { TYPE } from '../../theme'
+import { ExternalLink } from '../../theme/components'
+import { getEtherscanLink } from '../../utils'
+import { AutoColumn } from '../Column'
+import { AutoRow } from '../Row'
+
+export default function TxnPopup({ hash, success, summary }: { hash: string; success?: boolean; summary?: string }) {
+  const { chainId } = useActiveWeb3React()
+
+  const theme = useContext(ThemeContext)
+
+  return (
+    <AutoRow>
+      <div style={{ paddingRight: 16 }}>
+        {success ? <CheckCircle color={theme.green1} size={24} /> : <AlertCircle color={theme.red1} size={24} />}
+      </div>
+      <AutoColumn gap="8px">
+        <TYPE.body fontWeight={500}>{summary ?? 'Hash: ' + hash.slice(0, 8) + '...' + hash.slice(58, 65)}</TYPE.body>
+        <ExternalLink href={getEtherscanLink(chainId, hash, 'transaction')}>View on Etherscan</ExternalLink>
+      </AutoColumn>
+    </AutoRow>
+  )
+}

src/components/Popups/index.tsx

-import React, { useContext } from 'react'
-import styled, { ThemeContext } from 'styled-components'
+import React from 'react'
+import styled from 'styled-components'
 import { useMediaLayout } from 'use-media'
-
-import { X } from 'react-feather'
-import { PopupContent } from '../../state/application/actions'
-import { useActivePopups, useRemovePopup } from '../../state/application/hooks'
+import { useActivePopups } from '../../state/application/hooks'
 import { AutoColumn } from '../Column'
-import TxnPopup from '../TxnPopup'
-
-const StyledClose = styled(X)`
-  position: absolute;
-  right: 10px;
-  top: 10px;
-
-  :hover {
-    cursor: pointer;
-  }
-`
+import PopupItem from './PopupItem'
 
 const MobilePopupWrapper = styled.div<{ height: string | number }>`
   position: relative;
@@ -50,37 +37,9 @@ const FixedPopupColumn = styled(AutoColumn)`
   `};
 `
 
-const Popup = styled.div`
-  display: inline-block;
-  width: 100%;
-  padding: 1em;
-  background-color: ${({ theme }) => theme.bg1};
-  position: relative;
-  border-radius: 10px;
-  padding: 20px;
-  padding-right: 35px;
-  z-index: 2;
-  overflow: hidden;
-
-  ${({ theme }) => theme.mediaWidth.upToSmall`
-    min-width: 290px;
-  `}
-`
-
-function PopupItem({ content, popKey }: { content: PopupContent; popKey: string }) {
-  if ('txn' in content) {
-    const {
-      txn: { hash, success, summary }
-    } = content
-    return <TxnPopup popKey={popKey} hash={hash} success={success} summary={summary} />
-  }
-}
-
 export default function Popups() {
-  const theme = useContext(ThemeContext)
   // get all popups
   const activePopups = useActivePopups()
-  const removePopup = useRemovePopup()
 
   // switch view settings on mobile
   const isMobile = useMediaLayout({ maxWidth: '600px' })
@@ -88,14 +47,9 @@ export default function Popups() {
   if (!isMobile) {
     return (
       <FixedPopupColumn gap="20px">
-        {activePopups.map(item => {
-          return (
-            <Popup key={item.key}>
-              <StyledClose color={theme.text2} onClick={() => removePopup(item.key)} />
-              <PopupItem content={item.content} popKey={item.key} />
-            </Popup>
-          )
-        })}
+        {activePopups.map(item => (
+          <PopupItem key={item.key} content={item.content} popKey={item.key} />
+        ))}
       </FixedPopupColumn>
     )
   }
@@ -107,14 +61,9 @@ export default function Popups() {
           {activePopups // reverse so new items up front
             .slice(0)
             .reverse()
-            .map(item => {
-              return (
-                <Popup key={item.key}>
-                  <StyledClose color={theme.text2} onClick={() => removePopup(item.key)} />
-                  <PopupItem content={item.content} popKey={item.key} />
-                </Popup>
-              )
-            })}
+            .map(item => (
+              <PopupItem key={item.key} content={item.content} popKey={item.key} />
+            ))}
         </MobilePopupInner>
       </MobilePopupWrapper>
     )

src/components/SearchModal/CommonBases.tsx

@@ -30,7 +30,7 @@ export default function CommonBases({
   onSelect,
   selectedCurrency
 }: {
-  chainId: ChainId
+  chainId?: ChainId
   selectedCurrency?: Currency
   onSelect: (currency: Currency) => void
 }) {
@@ -52,8 +52,8 @@ export default function CommonBases({
             ETH
           </Text>
         </BaseWrapper>
-        {(SUGGESTED_BASES[chainId as ChainId] ?? []).map((token: Token) => {
-          const selected = currencyEquals(selectedCurrency, token)
+        {(chainId ? SUGGESTED_BASES[chainId] : []).map((token: Token) => {
+          const selected = selectedCurrency instanceof Token && selectedCurrency.address === token.address
           return (
             <BaseWrapper onClick={() => !selected && onSelect(token)} disable={selected} key={token.address}>
               <CurrencyLogo currency={token} style={{ marginRight: 8 }} />

src/components/SearchModal/CurrencyList.tsx

@@ -5,6 +5,7 @@ import { Text } from 'rebass'
 import { ThemeContext } from 'styled-components'
 import { useActiveWeb3React } from '../../hooks'
 import { useAllTokens } from '../../hooks/Tokens'
+import { useDefaultTokenList } from '../../state/lists/hooks'
 import { useAddUserToken, useRemoveUserAddedToken } from '../../state/user/hooks'
 import { useETHBalances } from '../../state/wallet/hooks'
 import { LinkStyledButton, TYPE } from '../../theme'
@@ -14,7 +15,7 @@ import { RowFixed } from '../Row'
 import CurrencyLogo from '../CurrencyLogo'
 import { FadedSpan, MenuItem } from './styleds'
 import Loader from '../Loader'
-import { isDefaultToken, isCustomAddedToken } from '../../utils'
+import { isDefaultToken } from '../../utils'
 
 function currencyKey(currency: Currency): string {
   return currency instanceof Token ? currency.address : currency === ETHER ? 'ETHER' : ''
@@ -38,6 +39,7 @@ export default function CurrencyList({
   const { account, chainId } = useActiveWeb3React()
   const theme = useContext(ThemeContext)
   const allTokens = useAllTokens()
+  const defaultTokens = useDefaultTokenList()
   const addToken = useAddUserToken()
   const removeToken = useRemoveUserAddedToken()
   const ETHBalance = useETHBalances([account])[account]
@@ -46,8 +48,8 @@ export default function CurrencyList({
     return memo(function CurrencyRow({ index, style }: { index: number; style: CSSProperties }) {
       const currency = index === 0 ? Currency.ETHER : currencies[index - 1]
       const key = currencyKey(currency)
-      const isDefault = isDefaultToken(currency)
-      const customAdded = isCustomAddedToken(allTokens, currency)
+      const isDefault = isDefaultToken(defaultTokens, currency)
+      const customAdded = Boolean(!isDefault && currency instanceof Token && allTokens[currency.address])
       const balance = currency === ETHER ? ETHBalance : allBalances[key]
 
       const zeroBalance = balance && JSBI.equal(JSBI.BigInt(0), balance.raw)
@@ -129,6 +131,7 @@ export default function CurrencyList({
     allTokens,
     chainId,
     currencies,
+    defaultTokens,
     onCurrencySelect,
     otherCurrency,
     removeToken,

src/components/Settings/index.tsx

@@ -88,6 +88,9 @@ const MenuFlyout = styled.span`
   background-color: ${({ theme }) => theme.bg1};
   box-shadow: 0px 0px 1px rgba(0, 0, 0, 0.01), 0px 4px 8px rgba(0, 0, 0, 0.04), 0px 16px 24px rgba(0, 0, 0, 0.04),
     0px 24px 32px rgba(0, 0, 0, 0.01);
+
+  border: 1px solid ${({ theme }) => theme.bg3};
+
   border-radius: 0.5rem;
   display: flex;
   flex-direction: column;

src/components/TokenWarningCard/index.tsx

@@ -5,6 +5,7 @@ import styled from 'styled-components'
 import { ReactComponent as Close } from '../../assets/images/x.svg'
 import { useActiveWeb3React } from '../../hooks'
 import { useAllTokens } from '../../hooks/Tokens'
+import { useDefaultTokenList } from '../../state/lists/hooks'
 import { Field } from '../../state/swap/actions'
 import { useTokenWarningDismissal } from '../../state/user/hooks'
 import { ExternalLink, TYPE } from '../../theme'
@@ -67,8 +68,8 @@ interface TokenWarningCardProps extends PropsOfExcluding<typeof Wrapper, 'error'
 
 export default function TokenWarningCard({ token, ...rest }: TokenWarningCardProps) {
   const { chainId } = useActiveWeb3React()
-
-  const isDefault = isDefaultToken(token)
+  const defaultTokens = useDefaultTokenList()
+  const isDefault = isDefaultToken(defaultTokens, token)
 
   const tokenSymbol = token?.symbol?.toLowerCase() ?? ''
   const tokenName = token?.name?.toLowerCase() ?? ''

src/constants/index.ts

 import { ChainId, JSBI, Percent, Token, WETH } from '@uniswap/sdk'
 
 import { fortmatic, injected, portis, walletconnect, walletlink } from '../connectors'
-import { COMP, DAI, MKR, USDC, USDT } from './tokens/mainnet'
 
 export const ROUTER_ADDRESS = '0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D'
 
@@ -10,6 +9,12 @@ type ChainTokenList = {
   readonly [chainId in ChainId]: Token[]
 }
 
+export const DAI = new Token(ChainId.MAINNET, '0x6B175474E89094C44Da98b954EedeAC495271d0F', 18, 'DAI', 'Dai Stablecoin')
+export const USDC = new Token(ChainId.MAINNET, '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48', 6, 'USDC', 'USD//C')
+export const USDT = new Token(ChainId.MAINNET, '0xdAC17F958D2ee523a2206206994597C13D831ec7', 6, 'USDT', 'Tether USD')
+export const COMP = new Token(ChainId.MAINNET, '0xc00e94Cb662C3520282E6f5717214004A7f26888', 18, 'COMP', 'Compound')
+export const MKR = new Token(ChainId.MAINNET, '0x9f8F72aA9304c8B593d555F12eF6589cC3A579A2', 18, 'MKR', 'Maker')
+
 const WETH_ONLY: ChainTokenList = {
   [ChainId.MAINNET]: [WETH[ChainId.MAINNET]],
   [ChainId.ROPSTEN]: [WETH[ChainId.ROPSTEN]],
@@ -142,3 +147,7 @@ export const BLOCKED_PRICE_IMPACT_NON_EXPERT: Percent = new Percent(JSBI.BigInt(
 // used to ensure the user doesn't send so much ETH so they end up with <.01
 export const MIN_ETH: JSBI = JSBI.exponentiate(JSBI.BigInt(10), JSBI.BigInt(16)) // .01 ETH
 export const BETTER_TRADE_LINK_THRESHOLD = new Percent(JSBI.BigInt(75), JSBI.BigInt(10000))
+
+// the Uniswap Default token list lives here
+export const DEFAULT_TOKEN_LIST_URL =
+  'https://unpkg.com/@uniswap/default-token-list@latest/uniswap-default.tokenlist.json'

src/constants/tokens/index.ts

-import { ChainId, Token, WETH } from '@uniswap/sdk'
-import KOVAN_TOKENS from './kovan'
-import MAINNET_TOKENS from './mainnet'
-import RINKEBY_TOKENS from './rinkeby'
-import ROPSTEN_TOKENS from './ropsten'
-
-type AllTokens = Readonly<{ [chainId in ChainId]: Readonly<{ [tokenAddress: string]: Token }> }>
-export const ALL_TOKENS: AllTokens = [
-  // WETH on all chains
-  ...Object.values(WETH),
-  // chain-specific tokens
-  ...MAINNET_TOKENS,
-  ...RINKEBY_TOKENS,
-  ...KOVAN_TOKENS,
-  ...ROPSTEN_TOKENS
-]
-  // put into an object
-  .reduce<AllTokens>(
-    (tokenMap, token) => {
-      if (tokenMap[token.chainId][token.address] !== undefined) throw Error('Duplicate tokens.')
-      return {
-        ...tokenMap,
-        [token.chainId]: {
-          ...tokenMap[token.chainId],
-          [token.address]: token
-        }
-      }
-    },
-    {
-      [ChainId.MAINNET]: {},
-      [ChainId.RINKEBY]: {},
-      [ChainId.GÖRLI]: {},
-      [ChainId.ROPSTEN]: {},
-      [ChainId.KOVAN]: {}
-    }
-  )

src/constants/tokens/kovan.ts

-import { Token, ChainId } from '@uniswap/sdk'
-
-export default [
-  new Token(ChainId.KOVAN, '0x4F96Fe3b7A6Cf9725f59d353F723c1bDb64CA6Aa', 18, 'DAI', 'Dai Stablecoin'),
-  new Token(ChainId.KOVAN, '0xAaF64BFCC32d0F15873a02163e7E500671a4ffcD', 18, 'MKR', 'Maker')
-]

src/constants/tokens/mainnet.ts

-import { Token, ChainId } from '@uniswap/sdk'
-
-export const DAI = new Token(ChainId.MAINNET, '0x6B175474E89094C44Da98b954EedeAC495271d0F', 18, 'DAI', 'Dai Stablecoin')
-export const USDC = new Token(ChainId.MAINNET, '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48', 6, 'USDC', 'USD//C')
-export const USDT = new Token(ChainId.MAINNET, '0xdAC17F958D2ee523a2206206994597C13D831ec7', 6, 'USDT', 'Tether USD')
-export const COMP = new Token(ChainId.MAINNET, '0xc00e94Cb662C3520282E6f5717214004A7f26888', 18, 'COMP', 'Compound')
-export const MKR = new Token(ChainId.MAINNET, '0x9f8F72aA9304c8B593d555F12eF6589cC3A579A2', 18, 'MKR', 'Maker')
-
-export default [
-  new Token(ChainId.MAINNET, '0xB6eD7644C69416d67B522e20bC294A9a9B405B31', 8, '0xBTC', '0xBitcoin Token'),
-  new Token(ChainId.MAINNET, '0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d', 18, 'aDAI', 'Aave Interest bearing DAI'),
-  new Token(ChainId.MAINNET, '0x737F98AC8cA59f2C68aD658E3C3d8C8963E40a4c', 18, 'AMN', 'Amon'),
-  new Token(ChainId.MAINNET, '0xD46bA6D942050d489DBd938a2C909A5d5039A161', 9, 'AMPL', 'Ampleforth'),
-  new Token(ChainId.MAINNET, '0xcD62b1C403fa761BAadFC74C525ce2B51780b184', 18, 'ANJ', 'Aragon Network Juror'),
-  new Token(ChainId.MAINNET, '0x960b236A07cf122663c4303350609A66A7B288C0', 18, 'ANT', 'Aragon Network Token'),
-  new Token(ChainId.MAINNET, '0x27054b13b1B798B345b591a4d22e6562d47eA75a', 4, 'AST', 'AirSwap Token'),
-  new Token(ChainId.MAINNET, '0xBA11D00c5f74255f56a5E366F4F77f5A186d7f55', 18, 'BAND', 'BandToken'),
-  new Token(ChainId.MAINNET, '0x0D8775F648430679A709E98d2b0Cb6250d2887EF', 18, 'BAT', 'Basic Attention Token'),
-  new Token(ChainId.MAINNET, '0xba100000625a3754423978a60c9317c58a424e3D', 18, 'BAL', 'Balancer'),
-  new Token(ChainId.MAINNET, '0x107c4504cd79C5d2696Ea0030a8dD4e92601B82e', 18, 'BLT', 'Bloom Token'),
-  new Token(ChainId.MAINNET, '0x1F573D6Fb3F13d689FF844B4cE37794d79a7FF1C', 18, 'BNT', 'Bancor Network Token'),
-  new Token(ChainId.MAINNET, '0x0327112423F3A68efdF1fcF402F6c5CB9f7C33fd', 18, 'BTC++', 'PieDAO BTC++'),
-  new Token(ChainId.MAINNET, '0x56d811088235F11C8920698a204A5010a788f4b3', 18, 'BZRX', 'bZx Protocol Token'),
-  new Token(ChainId.MAINNET, '0x4F9254C83EB525f9FCf346490bbb3ed28a81C667', 18, 'CELR', 'CelerToken'),
-  new Token(ChainId.MAINNET, '0xF5DCe57282A584D2746FaF1593d3121Fcac444dC', 8, 'cSAI', 'Compound Dai'),
-  new Token(ChainId.MAINNET, '0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643', 8, 'cDAI', 'Compound Dai'),
-  new Token(ChainId.MAINNET, '0x39AA39c021dfbaE8faC545936693aC917d5E7563', 8, 'cUSDC', 'Compound USD Coin'),
-  new Token(ChainId.MAINNET, '0xaaAEBE6Fe48E54f431b0C390CfaF0b017d09D42d', 4, 'CEL', 'Celsius'),
-  new Token(ChainId.MAINNET, '0x06AF07097C9Eeb7fD685c692751D5C66dB49c215', 18, 'CHAI', 'Chai'),
-  COMP,
-  new Token(ChainId.MAINNET, '0x89d24A6b4CcB1B6fAA2625fE562bDD9a23260359', 18, 'SAI', 'Dai Stablecoin v1.0 (SAI)'),
-  DAI,
-  new Token(ChainId.MAINNET, '0x0Cf0Ee63788A0849fE5297F3407f701E122cC023', 18, 'DATA', 'Streamr DATAcoin'),
-  new Token(ChainId.MAINNET, '0xE0B7927c4aF23765Cb51314A0E0521A9645F0E2A', 9, 'DGD', 'DigixDAO'),
-  new Token(ChainId.MAINNET, '0x4f3AfEC4E5a3F2A6a1A411DEF7D7dFe50eE057bF', 9, 'DGX', 'Digix Gold Token'),
-  new Token(
-    ChainId.MAINNET,
-    '0xc719d010B63E5bbF2C0551872CD5316ED26AcD83',
-    18,
-    'DIP',
-    'Decentralized Insurance Protocol'
-  ),
-  new Token(ChainId.MAINNET, '0xC0F9bD5Fa5698B6505F643900FFA515Ea5dF54A9', 18, 'DONUT', 'Donut'),
-  new Token(ChainId.MAINNET, '0x86FADb80d8D2cff3C3680819E4da99C10232Ba0F', 18, 'EBASE', 'EURBASE Stablecoin'),
-  new Token(ChainId.MAINNET, '0xF629cBd94d3791C9250152BD8dfBDF380E2a3B9c', 18, 'ENJ', 'Enjin Coin'),
-  new Token(ChainId.MAINNET, '0x06f65b8CfCb13a9FE37d836fE9708dA38Ecb29B2', 18, 'FAME', 'SAINT FAME: Genesis Shirt'),
-  new Token(ChainId.MAINNET, '0x4946Fcea7C692606e8908002e55A582af44AC121', 18, 'FOAM', 'FOAM Token'),
-  new Token(ChainId.MAINNET, '0x419D0d8BdD9aF5e606Ae2232ed285Aff190E711b', 8, 'FUN', 'FunFair'),
-  new Token(ChainId.MAINNET, '0x4a57E687b9126435a9B19E4A802113e266AdeBde', 18, 'FXC', 'Flexacoin'),
-  new Token(ChainId.MAINNET, '0x543Ff227F64Aa17eA132Bf9886cAb5DB55DCAddf', 18, 'GEN', 'DAOstack'),
-  new Token(ChainId.MAINNET, '0x6810e776880C02933D47DB1b9fc05908e5386b96', 18, 'GNO', 'Gnosis Token'),
-  new Token(ChainId.MAINNET, '0x12B19D3e2ccc14Da04FAe33e63652ce469b3F2FD', 12, 'GRID', 'GRID Token'),
-  new Token(ChainId.MAINNET, '0x0000000000b3F879cb30FE243b4Dfee438691c04', 2, 'GST2', 'Gastoken.io'),
-  new Token(ChainId.MAINNET, '0xF1290473E210b2108A85237fbCd7b6eb42Cc654F', 18, 'HEDG', 'HedgeTrade'),
-  new Token(ChainId.MAINNET, '0x6c6EE5e31d828De241282B9606C8e98Ea48526E2', 18, 'HOT', 'HoloToken'),
-  new Token(ChainId.MAINNET, '0x493C57C4763932315A328269E1ADaD09653B9081', 18, 'iDAI', 'Fulcrum DAI iToken'),
-  new Token(ChainId.MAINNET, '0x14094949152EDDBFcd073717200DA82fEd8dC960', 18, 'iSAI', 'Fulcrum SAI iToken '),
-  new Token(ChainId.MAINNET, '0x6fB3e0A217407EFFf7Ca062D46c26E5d60a14d69', 18, 'IOTX', 'IoTeX Network'),
-  new Token(ChainId.MAINNET, '0x4Cd988AfBad37289BAAf53C13e98E2BD46aAEa8c', 18, 'KEY', 'KEY'),
-  new Token(ChainId.MAINNET, '0xdd974D5C2e2928deA5F71b9825b8b646686BD200', 18, 'KNC', 'Kyber Network Crystal'),
-  new Token(ChainId.MAINNET, '0x514910771AF9Ca656af840dff83E8264EcF986CA', 18, 'LINK', 'ChainLink Token'),
-  new Token(ChainId.MAINNET, '0xBBbbCA6A901c926F240b89EacB641d8Aec7AEafD', 18, 'LRC', 'LoopringCoin V2'),
-  new Token(ChainId.MAINNET, '0x80fB784B7eD66730e8b1DBd9820aFD29931aab03', 18, 'LEND', 'EthLend Token'),
-  new Token(ChainId.MAINNET, '0xA4e8C3Ec456107eA67d3075bF9e3DF3A75823DB0', 18, 'LOOM', 'LoomToken'),
-  new Token(ChainId.MAINNET, '0x58b6A8A3302369DAEc383334672404Ee733aB239', 18, 'LPT', 'Livepeer Token'),
-  new Token(ChainId.MAINNET, '0xD29F0b5b3F50b07Fe9a9511F7d86F4f4bAc3f8c4', 18, 'LQD', 'Liquidity.Network Token'),
-  new Token(ChainId.MAINNET, '0x0F5D2fB29fb7d3CFeE444a200298f468908cC942', 18, 'MANA', 'Decentraland MANA'),
-  new Token(ChainId.MAINNET, '0x7D1AfA7B718fb893dB30A3aBc0Cfc608AaCfeBB0', 18, 'MATIC', 'Matic Token'),
-  new Token(ChainId.MAINNET, '0x8888889213DD4dA823EbDD1e235b09590633C150', 18, 'MBC', 'Marblecoin'),
-  new Token(ChainId.MAINNET, '0xd15eCDCF5Ea68e3995b2D0527A0aE0a3258302F8', 18, 'MCX', 'MachiX Token'),
-  new Token(ChainId.MAINNET, '0xa3d58c4E56fedCae3a7c43A725aeE9A71F0ece4e', 18, 'MET', 'Metronome'),
-  new Token(ChainId.MAINNET, '0x80f222a749a2e18Eb7f676D371F19ad7EFEEe3b7', 18, 'MGN', 'Magnolia Token'),
-  MKR,
-  new Token(ChainId.MAINNET, '0xec67005c4E498Ec7f55E092bd1d35cbC47C91892', 18, 'MLN', 'Melon Token'),
-  new Token(ChainId.MAINNET, '0x957c30aB0426e0C93CD8241E2c60392d08c6aC8e', 0, 'MOD', 'Modum Token'),
-  new Token(ChainId.MAINNET, '0xe2f2a5C287993345a840Db3B0845fbC70f5935a5', 18, 'mUSD', 'mStable USD'),
-  new Token(ChainId.MAINNET, '0xB62132e35a6c13ee1EE0f84dC5d40bad8d815206', 18, 'NEXO', 'Nexo'),
-  new Token(ChainId.MAINNET, '0x1776e1F26f98b1A5dF9cD347953a26dd3Cb46671', 18, 'NMR', 'Numeraire'),
-  new Token(ChainId.MAINNET, '0x985dd3D42De1e256d09e1c10F112bCCB8015AD41', 18, 'OCEAN', 'OceanToken'),
-  new Token(ChainId.MAINNET, '0x4575f41308EC1483f3d399aa9a2826d74Da13Deb', 18, 'OXT', 'Orchid'),
-  new Token(ChainId.MAINNET, '0xD56daC73A4d6766464b38ec6D91eB45Ce7457c44', 18, 'PAN', 'Panvala pan'),
-  new Token(ChainId.MAINNET, '0x8E870D67F660D95d5be530380D0eC0bd388289E1', 18, 'PAX', 'PAX'),
-  new Token(ChainId.MAINNET, '0x45804880De22913dAFE09f4980848ECE6EcbAf78', 18, 'PAXG', 'Paxos Gold'),
-  new Token(ChainId.MAINNET, '0x93ED3FBe21207Ec2E8f2d3c3de6e058Cb73Bc04d', 18, 'PNK', 'Pinakion'),
-  new Token(ChainId.MAINNET, '0x6758B7d441a9739b98552B373703d8d3d14f9e62', 18, 'POA20', 'POA ERC20 on Foundation'),
-  new Token(ChainId.MAINNET, '0x687BfC3E73f6af55F0CccA8450114D107E781a0e', 18, 'QCH', 'QChi'),
-  new Token(ChainId.MAINNET, '0x4a220E6096B25EADb88358cb44068A3248254675', 18, 'QNT', 'Quant'),
-  new Token(ChainId.MAINNET, '0x99ea4dB9EE77ACD40B119BD1dC4E33e1C070b80d', 18, 'QSP', 'Quantstamp Token'),
-  new Token(ChainId.MAINNET, '0xF970b8E36e23F7fC3FD752EeA86f8Be8D83375A6', 18, 'RCN', 'Ripio Credit Network Token'),
-  new Token(ChainId.MAINNET, '0x255Aa6DF07540Cb5d3d297f0D0D4D84cb52bc8e6', 18, 'RDN', 'Raiden Token'),
-  new Token(ChainId.MAINNET, '0x408e41876cCCDC0F92210600ef50372656052a38', 18, 'REN', 'Republic Token'),
-  new Token(ChainId.MAINNET, '0x459086F2376525BdCebA5bDDA135e4E9d3FeF5bf', 8, 'renBCH', 'renBCH'),
-  new Token(ChainId.MAINNET, '0xEB4C2781e4ebA804CE9a9803C67d0893436bB27D', 8, 'renBTC', 'renBTC'),
-  new Token(ChainId.MAINNET, '0x1C5db575E2Ff833E46a2E9864C22F4B22E0B37C2', 8, 'renZEC', 'renZEC'),
-  new Token(ChainId.MAINNET, '0x1985365e9f78359a9B6AD760e32412f4a445E862', 18, 'REPv1', 'Augur v1 Reputation'),
-  new Token(ChainId.MAINNET, '0x9469D013805bFfB7D3DEBe5E7839237e535ec483', 18, 'RING', 'Darwinia Network Native Token'),
-  new Token(ChainId.MAINNET, '0x607F4C5BB672230e8672085532f7e901544a7375', 9, 'RLC', 'iEx.ec Network Token'),
-  new Token(ChainId.MAINNET, '0xB4EFd85c19999D84251304bDA99E90B92300Bd93', 18, 'RPL', 'Rocket Pool'),
-  new Token(ChainId.MAINNET, '0x4156D3342D5c385a87D264F90653733592000581', 8, 'SALT', 'Salt'),
-  new Token(ChainId.MAINNET, '0x7C5A0CE9267ED19B22F8cae653F198e3E8daf098', 18, 'SAN', 'SANtiment network token'),
-  new Token(ChainId.MAINNET, '0x5e74C9036fb86BD7eCdcb084a0673EFc32eA31cb', 18, 'sETH', 'Synth sETH'),
-  new Token(ChainId.MAINNET, '0x3A9FfF453d50D4Ac52A6890647b823379ba36B9E', 18, 'SHUF', 'Shuffle.Monster V3'),
-  new Token(ChainId.MAINNET, '0x744d70FDBE2Ba4CF95131626614a1763DF805B9E', 18, 'SNT', 'Status Network Token'),
-  new Token(ChainId.MAINNET, '0xC011a73ee8576Fb46F5E1c5751cA3B9Fe0af2a6F', 18, 'SNX', 'Synthetix Network Token'),
-  new Token(ChainId.MAINNET, '0x23B608675a2B2fB1890d3ABBd85c5775c51691d5', 18, 'SOCKS', 'Unisocks Edition 0'),
-  new Token(ChainId.MAINNET, '0x42d6622deCe394b54999Fbd73D108123806f6a18', 18, 'SPANK', 'SPANK'),
-  new Token(ChainId.MAINNET, '0x0Ae055097C6d159879521C384F1D2123D1f195e6', 18, 'STAKE', 'STAKE'),
-  new Token(ChainId.MAINNET, '0xB64ef51C888972c908CFacf59B47C1AfBC0Ab8aC', 8, 'STORJ', 'StorjToken'),
-  new Token(ChainId.MAINNET, '0x57Ab1ec28D129707052df4dF418D58a2D46d5f51', 18, 'sUSD', 'Synth sUSD'),
-  new Token(ChainId.MAINNET, '0x261EfCdD24CeA98652B9700800a13DfBca4103fF', 18, 'sXAU', 'Synth sXAU'),
-  new Token(ChainId.MAINNET, '0x8CE9137d39326AD0cD6491fb5CC0CbA0e089b6A9', 18, 'SXP', 'Swipe'),
-  new Token(ChainId.MAINNET, '0x00006100F7090010005F1bd7aE6122c3C2CF0090', 18, 'TAUD', 'TrueAUD'),
-  new Token(ChainId.MAINNET, '0x00000100F2A2bd000715001920eB70D229700085', 18, 'TCAD', 'TrueCAD'),
-  new Token(ChainId.MAINNET, '0x00000000441378008EA67F4284A57932B1c000a5', 18, 'TGBP', 'TrueGBP'),
-  new Token(ChainId.MAINNET, '0x0000852600CEB001E08e00bC008be620d60031F2', 18, 'THKD', 'TrueHKD'),
-  new Token(ChainId.MAINNET, '0xaAAf91D9b90dF800Df4F55c205fd6989c977E73a', 8, 'TKN', 'Monolith TKN'),
-  new Token(ChainId.MAINNET, '0x0Ba45A8b5d5575935B8158a88C631E9F9C95a2e5', 18, 'TRB', 'Tellor Tributes'),
-  new Token(ChainId.MAINNET, '0xCb94be6f13A1182E4A4B6140cb7bf2025d28e41B', 6, 'TRST', 'Trustcoin'),
-  new Token(ChainId.MAINNET, '0x2C537E5624e4af88A7ae4060C022609376C8D0EB', 6, 'TRYB', 'BiLira'),
-  new Token(ChainId.MAINNET, '0x0000000000085d4780B73119b644AE5ecd22b376', 18, 'TUSD', 'TrueUSD'),
-  new Token(ChainId.MAINNET, '0x8400D94A5cb0fa0D041a3788e395285d61c9ee5e', 8, 'UBT', 'UniBright'),
-  new Token(ChainId.MAINNET, '0x04Fa0d235C4abf4BcF4787aF4CF447DE572eF828', 18, 'UMA', 'UMA Voting Token v1'),
-  USDC,
-  new Token(ChainId.MAINNET, '0xA4Bdb11dc0a2bEC88d24A3aa1E6Bb17201112eBe', 6, 'USDS', 'StableUSD'),
-  USDT,
-  new Token(ChainId.MAINNET, '0xeb269732ab75A6fD61Ea60b06fE994cD32a83549', 18, 'USDx', 'dForce'),
-  new Token(ChainId.MAINNET, '0x9A48BD0EC040ea4f1D3147C025cd4076A2e71e3e', 18, 'USD++', 'PieDAO USD++'),
-  new Token(ChainId.MAINNET, '0x8f3470A7388c05eE4e7AF3d01D8C722b0FF52374', 18, 'VERI', 'Veritaseum'),
-  new Token(ChainId.MAINNET, '0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599', 8, 'WBTC', 'Wrapped BTC'),
-  new Token(ChainId.MAINNET, '0x09fE5f0236F0Ea5D930197DCE254d77B04128075', 18, 'WCK', 'Wrapped CryptoKitties'),
-  new Token(ChainId.MAINNET, '0xB4272071eCAdd69d933AdcD19cA99fe80664fc08', 18, 'XCHF', 'CryptoFranc'),
-  new Token(ChainId.MAINNET, '0x0f7F961648aE6Db43C75663aC7E5414Eb79b5704', 18, 'XIO', 'XIO Network'),
-  new Token(ChainId.MAINNET, '0xE41d2489571d322189246DaFA5ebDe1F4699F498', 18, 'ZRX', '0x Protocol Token')
-]

src/constants/tokens/rinkeby.ts

-import { Token, ChainId } from '@uniswap/sdk'
-
-export default [
-  new Token(ChainId.RINKEBY, '0xc7AD46e0b8a400Bb3C915120d284AafbA8fc4735', 18, 'DAI', 'Dai Stablecoin'),
-  new Token(ChainId.RINKEBY, '0xF9bA5210F91D0474bd1e1DcDAeC4C58E359AaD85', 18, 'MKR', 'Maker')
-]

src/constants/tokens/ropsten.ts

-import { Token, ChainId } from '@uniswap/sdk'
-
-export default [new Token(ChainId.ROPSTEN, '0xaD6D458402F60fD3Bd25163575031ACDce07538D', 18, 'DAI', 'Dai Stablecoin')]

src/hooks/Tokens.ts

 import { parseBytes32String } from '@ethersproject/strings'
-import { ChainId, Currency, ETHER, Token } from '@uniswap/sdk'
+import { Currency, ETHER, Token } from '@uniswap/sdk'
 import { useMemo } from 'react'
-import { ALL_TOKENS } from '../constants/tokens'
+import { useDefaultTokenList } from '../state/lists/hooks'
 import { NEVER_RELOAD, useSingleCallResult } from '../state/multicall/hooks'
 import { useUserAddedTokens } from '../state/user/hooks'
 import { isAddress } from '../utils'
@@ -12,6 +12,7 @@ import { useBytes32TokenContract, useTokenContract } from './useContract'
 export function useAllTokens(): { [address: string]: Token } {
   const { chainId } = useActiveWeb3React()
   const userAddedTokens = useUserAddedTokens()
+  const allTokens = useDefaultTokenList()
 
   return useMemo(() => {
     if (!chainId) return {}
@@ -25,10 +26,10 @@ export function useAllTokens(): { [address: string]: Token } {
           },
           // must make a copy because reduce modifies the map, and we do not
           // want to make a copy in every iteration
-          { ...ALL_TOKENS[chainId as ChainId] }
+          { ...allTokens[chainId] }
         )
     )
-  }, [userAddedTokens, chainId])
+  }, [chainId, userAddedTokens, allTokens])
 }
 
 // parse a name or symbol from a token response

src/hooks/index.ts

@@ -72,21 +72,12 @@ export function useInactiveListener(suppress = false) {
         }
       }
 
-      const handleNetworkChanged = () => {
-        // eat errors
-        activate(injected, undefined, true).catch(error => {
-          console.error('Failed to activate after networks changed', error)
-        })
-      }
-
       ethereum.on('chainChanged', handleChainChanged)
-      ethereum.on('networkChanged', handleNetworkChanged)
       ethereum.on('accountsChanged', handleAccountsChanged)
 
       return () => {
         if (ethereum.removeListener) {
           ethereum.removeListener('chainChanged', handleChainChanged)
-          ethereum.removeListener('networkChanged', handleNetworkChanged)
           ethereum.removeListener('accountsChanged', handleAccountsChanged)
         }
       }

src/hooks/useIsWindowVisible.ts

 import { useCallback, useEffect, useState } from 'react'
 
+const VISIBILITY_STATE_SUPPORTED = 'visibilityState' in document
+
+function isWindowVisible() {
+  return !VISIBILITY_STATE_SUPPORTED || document.visibilityState !== 'hidden'
+}
+
 /**
  * Returns whether the window is currently visible to the user.
  */
 export default function useIsWindowVisible(): boolean {
-  const [focused, setFocused] = useState<boolean>(true)
+  const [focused, setFocused] = useState<boolean>(isWindowVisible())
   const listener = useCallback(() => {
-    setFocused(document.visibilityState !== 'hidden')
+    setFocused(isWindowVisible())
   }, [setFocused])
 
   useEffect(() => {
+    if (!VISIBILITY_STATE_SUPPORTED) return
+
     document.addEventListener('visibilitychange', listener)
     return () => {
       document.removeEventListener('visibilitychange', listener)

src/hooks/useWrapCallback.ts

@@ -42,8 +42,12 @@ export default function useWrapCallback(
         execute:
           sufficientBalance && inputAmount
             ? async () => {
-                const txReceipt = await wethContract.deposit({ value: `0x${inputAmount.raw.toString(16)}` })
-                addTransaction(txReceipt, { summary: `Wrap ${inputAmount.toSignificant(6)} ETH to WETH` })
+                try {
+                  const txReceipt = await wethContract.deposit({ value: `0x${inputAmount.raw.toString(16)}` })
+                  addTransaction(txReceipt, { summary: `Wrap ${inputAmount.toSignificant(6)} ETH to WETH` })
+                } catch (error) {
+                  console.error('Could not deposit', error)
+                }
               }
             : undefined,
         error: sufficientBalance ? undefined : 'Insufficient ETH balance'
@@ -54,8 +58,12 @@ export default function useWrapCallback(
         execute:
           sufficientBalance && inputAmount
             ? async () => {
-                const txReceipt = await wethContract.withdraw(`0x${inputAmount.raw.toString(16)}`)
-                addTransaction(txReceipt, { summary: `Unwrap ${inputAmount.toSignificant(6)} WETH to ETH` })
+                try {
+                  const txReceipt = await wethContract.withdraw(`0x${inputAmount.raw.toString(16)}`)
+                  addTransaction(txReceipt, { summary: `Unwrap ${inputAmount.toSignificant(6)} WETH to ETH` })
+                } catch (error) {
+                  console.error('Could not withdraw', error)
+                }
               }
             : undefined,
         error: sufficientBalance ? undefined : 'Insufficient WETH balance'

src/index.tsx

@@ -12,12 +12,17 @@ import App from './pages/App'
 import store from './state'
 import ApplicationUpdater from './state/application/updater'
 import TransactionUpdater from './state/transactions/updater'
+import ListsUpdater from './state/lists/updater'
 import UserUpdater from './state/user/updater'
 import MulticallUpdater from './state/multicall/updater'
 import ThemeProvider, { FixedGlobalStyle, ThemedGlobalStyle } from './theme'
 
 const Web3ProviderNetwork = createWeb3ReactRoot(NetworkContextName)
 
+if ('ethereum' in window) {
+  ;(window.ethereum as any).autoRefreshOnNetworkChange = false
+}
+
 function getLibrary(provider: any): Web3Provider {
   const library = new Web3Provider(provider)
   library.pollingInterval = 15000
@@ -44,6 +49,7 @@ window.addEventListener('error', error => {
 function Updaters() {
   return (
     <>
+      <ListsUpdater />
       <UserUpdater />
       <ApplicationUpdater />
       <TransactionUpdater />

src/pages/MigrateV1/index.tsx

@@ -6,7 +6,8 @@ import { AutoRow } from '../../components/Row'
 import { SearchInput } from '../../components/SearchModal/styleds'
 import { useAllTokenV1Exchanges } from '../../data/V1'
 import { useActiveWeb3React } from '../../hooks'
-import { useToken, useAllTokens } from '../../hooks/Tokens'
+import { useAllTokens, useToken } from '../../hooks/Tokens'
+import { useDefaultTokenList } from '../../state/lists/hooks'
 import { useTokenBalancesWithLoadingIndicator } from '../../state/wallet/hooks'
 import { BackArrow, TYPE } from '../../theme'
 import { LightCard } from '../../components/Card'
@@ -16,7 +17,7 @@ import V1PositionCard from '../../components/PositionCard/V1'
 import QuestionHelper from '../../components/QuestionHelper'
 import { Dots } from '../../components/swap/styleds'
 import { useAddUserToken } from '../../state/user/hooks'
-import { isDefaultToken, isCustomAddedToken } from '../../utils'
+import { isDefaultToken } from '../../utils'
 
 export default function MigrateV1() {
   const theme = useContext(ThemeContext)
@@ -27,15 +28,15 @@ export default function MigrateV1() {
 
   // automatically add the search token
   const token = useToken(tokenSearch)
-  const isDefault = isDefaultToken(token)
+  const defaultTokens = useDefaultTokenList()
+  const isDefault = isDefaultToken(defaultTokens, token)
   const allTokens = useAllTokens()
-  const isCustomAdded = isCustomAddedToken(allTokens, token)
   const addToken = useAddUserToken()
   useEffect(() => {
-    if (token && !isDefault && !isCustomAdded) {
+    if (token && !isDefault && !allTokens[token.address]) {
       addToken(token)
     }
-  }, [token, isDefault, isCustomAdded, addToken])
+  }, [token, isDefault, addToken, allTokens])
 
   // get V1 LP balances
   const V1Exchanges = useAllTokenV1Exchanges()

src/state/application/actions.ts

 import { createAction } from '@reduxjs/toolkit'
+import { TokenList } from '@uniswap/token-lists'
 
-export type PopupContent = {
-  txn: {
-    hash: string
-    success: boolean
-    summary?: string
-  }
-}
+export type PopupContent =
+  | {
+      txn: {
+        hash: string
+        success: boolean
+        summary?: string
+      }
+    }
+  | {
+      listUpdate: {
+        listUrl: string
+        oldList: TokenList
+        newList: TokenList
+        auto: boolean
+      }
+    }
 
 export const updateBlockNumber = createAction<{ chainId: number; blockNumber: number }>('updateBlockNumber')
 export const toggleWalletModal = createAction<void>('toggleWalletModal')

src/state/application/reducer.test.ts

+import { ChainId } from '@uniswap/sdk'
+import { createStore, Store } from 'redux'
+import { addPopup, removePopup, toggleSettingsMenu, toggleWalletModal, updateBlockNumber } from './actions'
+import reducer, { ApplicationState } from './reducer'
+
+describe('application reducer', () => {
+  let store: Store<ApplicationState>
+
+  beforeEach(() => {
+    store = createStore(reducer, {
+      popupList: [],
+      walletModalOpen: false,
+      settingsMenuOpen: false,
+      blockNumber: {
+        [ChainId.MAINNET]: 3
+      }
+    })
+  })
+
+  describe('addPopup', () => {
+    it('adds the popup to list with a generated id', () => {
+      store.dispatch(addPopup({ content: { txn: { hash: 'abc', summary: 'test', success: true } } }))
+      const list = store.getState().popupList
+      expect(list).toHaveLength(1)
+      expect(typeof list[0].key).toEqual('string')
+      expect(list[0].show).toEqual(true)
+      expect(list[0].content).toEqual({ txn: { hash: 'abc', summary: 'test', success: true } })
+    })
+
+    it('replaces any existing popups with the same key', () => {
+      store.dispatch(addPopup({ key: 'abc', content: { txn: { hash: 'abc', summary: 'test', success: true } } }))
+      store.dispatch(addPopup({ key: 'abc', content: { txn: { hash: 'def', summary: 'test2', success: false } } }))
+      const list = store.getState().popupList
+      expect(list).toHaveLength(1)
+      expect(list[0].key).toEqual('abc')
+      expect(list[0].show).toEqual(true)
+      expect(list[0].content).toEqual({ txn: { hash: 'def', summary: 'test2', success: false } })
+    })
+  })
+
+  describe('toggleWalletModal', () => {
+    it('toggles wallet modal', () => {
+      store.dispatch(toggleWalletModal())
+      expect(store.getState().walletModalOpen).toEqual(true)
+      store.dispatch(toggleWalletModal())
+      expect(store.getState().walletModalOpen).toEqual(false)
+      store.dispatch(toggleWalletModal())
+      expect(store.getState().walletModalOpen).toEqual(true)
+    })
+  })
+
+  describe('settingsMenuOpen', () => {
+    it('toggles settings menu', () => {
+      store.dispatch(toggleSettingsMenu())
+      expect(store.getState().settingsMenuOpen).toEqual(true)
+      store.dispatch(toggleSettingsMenu())
+      expect(store.getState().settingsMenuOpen).toEqual(false)
+      store.dispatch(toggleSettingsMenu())
+      expect(store.getState().settingsMenuOpen).toEqual(true)
+    })
+  })
+
+  describe('updateBlockNumber', () => {
+    it('updates block number', () => {
+      store.dispatch(updateBlockNumber({ chainId: ChainId.MAINNET, blockNumber: 4 }))
+      expect(store.getState().blockNumber[ChainId.MAINNET]).toEqual(4)
+    })
+    it('no op if late', () => {
+      store.dispatch(updateBlockNumber({ chainId: ChainId.MAINNET, blockNumber: 2 }))
+      expect(store.getState().blockNumber[ChainId.MAINNET]).toEqual(3)
+    })
+    it('works with non-set chains', () => {
+      store.dispatch(updateBlockNumber({ chainId: ChainId.ROPSTEN, blockNumber: 2 }))
+      expect(store.getState().blockNumber).toEqual({
+        [ChainId.MAINNET]: 3,
+        [ChainId.ROPSTEN]: 2
+      })
+    })
+  })
+
+  describe('removePopup', () => {
+    beforeEach(() => {
+      store.dispatch(addPopup({ key: 'abc', content: { txn: { hash: 'abc', summary: 'test', success: true } } }))
+    })
+    it('hides the popup', () => {
+      expect(store.getState().popupList[0].show).toBe(true)
+      store.dispatch(removePopup({ key: 'abc' }))
+      expect(store.getState().popupList).toHaveLength(1)
+      expect(store.getState().popupList[0].show).toBe(false)
+    })
+  })
+})

src/state/application/reducer.ts

@@ -10,7 +10,7 @@ import {
 
 type PopupList = Array<{ key: string; show: boolean; content: PopupContent }>
 
-interface ApplicationState {
+export interface ApplicationState {
   blockNumber: { [chainId: number]: number }
   popupList: PopupList
   walletModalOpen: boolean
@@ -41,12 +41,13 @@ export default createReducer(initialState, builder =>
       state.settingsMenuOpen = !state.settingsMenuOpen
     })
     .addCase(addPopup, (state, { payload: { content, key } }) => {
-      if (key && state.popupList.some(popup => popup.key === key)) return
-      state.popupList.push({
-        key: key || nanoid(),
-        show: true,
-        content
-      })
+      state.popupList = (key ? state.popupList.filter(popup => popup.key !== key) : state.popupList).concat([
+        {
+          key: key || nanoid(),
+          show: true,
+          content
+        }
+      ])
     })
     .addCase(removePopup, (state, { payload: { key } }) => {
       state.popupList.forEach(p => {

src/state/index.ts

@@ -6,12 +6,13 @@ import user from './user/reducer'
 import transactions from './transactions/reducer'
 import swap from './swap/reducer'
 import mint from './mint/reducer'
+import lists from './lists/reducer'
 import burn from './burn/reducer'
 import multicall from './multicall/reducer'
 
 import { updateVersion } from './user/actions'
 
-const PERSISTED_KEYS: string[] = ['user', 'transactions']
+const PERSISTED_KEYS: string[] = ['user', 'transactions', 'lists']
 
 const store = configureStore({
   reducer: {
@@ -21,7 +22,8 @@ const store = configureStore({
     swap,
     mint,
     burn,
-    multicall
+    multicall,
+    lists
   },
   middleware: [...getDefaultMiddleware(), save({ states: PERSISTED_KEYS })],
   preloadedState: load({ states: PERSISTED_KEYS })

src/state/lists/actions.ts

+import { createAction, createAsyncThunk } from '@reduxjs/toolkit'
+import { TokenList, Version } from '@uniswap/token-lists'
+import schema from '@uniswap/token-lists/src/tokenlist.schema.json'
+import Ajv from 'ajv'
+import uriToHttp from '../../utils/uriToHttp'
+
+const tokenListValidator = new Ajv({ allErrors: true }).compile(schema)
+
+/**
+ * Contains the logic for resolving a URL to a valid token list
+ * @param listUrl list url
+ */
+async function getTokenList(listUrl: string): Promise<TokenList> {
+  const urls = uriToHttp(listUrl)
+  for (const url of urls) {
+    let response
+    try {
+      response = await fetch(url)
+      if (!response.ok) continue
+    } catch (error) {
+      console.error(`failed to fetch list ${listUrl} at uri ${url}`)
+      continue
+    }
+
+    const json = await response.json()
+    if (!tokenListValidator(json)) {
+      throw new Error(
+        tokenListValidator.errors?.reduce<string>((memo, error) => {
+          const add = `${error.dataPath} ${error.message ?? ''}`
+          return memo.length > 0 ? `${memo}; ${add}` : `${add}`
+        }, '') ?? 'Token list failed validation'
+      )
+    }
+    return json
+  }
+  throw new Error('Unrecognized list URL protocol.')
+}
+
+const fetchCache: { [url: string]: Promise<TokenList> } = {}
+export const fetchTokenList = createAsyncThunk<TokenList, string>(
+  'lists/fetchTokenList',
+  (url: string) =>
+    // this makes it so we only ever fetch a list a single time concurrently
+    (fetchCache[url] =
+      fetchCache[url] ??
+      getTokenList(url).catch(error => {
+        delete fetchCache[url]
+        throw error
+      }))
+)
+
+export const acceptListUpdate = createAction<string>('lists/acceptListUpdate')
+export const addList = createAction<string>('lists/addList')
+export const rejectVersionUpdate = createAction<Version>('lists/rejectVersionUpdate')

src/state/lists/hooks.ts

+import { ChainId, Token } from '@uniswap/sdk'
+import { TokenInfo, TokenList } from '@uniswap/token-lists'
+import { useMemo } from 'react'
+import { useSelector } from 'react-redux'
+import { DEFAULT_TOKEN_LIST_URL } from '../../constants'
+import { AppState } from '../index'
+
+/**
+ * Token instances created from token info.
+ */
+export class WrappedTokenInfo extends Token {
+  public readonly tokenInfo: TokenInfo
+  constructor(tokenInfo: TokenInfo) {
+    super(tokenInfo.chainId, tokenInfo.address, tokenInfo.decimals, tokenInfo.symbol, tokenInfo.name)
+    this.tokenInfo = tokenInfo
+  }
+  public get logoURI(): string | undefined {
+    return this.tokenInfo.logoURI
+  }
+}
+
+export type TokenAddressMap = Readonly<{ [chainId in ChainId]: Readonly<{ [tokenAddress: string]: WrappedTokenInfo }> }>
+
+/**
+ * An empty result, useful as a default.
+ */
+const EMPTY_LIST: TokenAddressMap = {
+  [ChainId.KOVAN]: {},
+  [ChainId.RINKEBY]: {},
+  [ChainId.ROPSTEN]: {},
+  [ChainId.GÖRLI]: {},
+  [ChainId.MAINNET]: {}
+}
+
+const listCache: WeakMap<TokenList, TokenAddressMap> | null =
+  'WeakMap' in window ? new WeakMap<TokenList, TokenAddressMap>() : null
+
+export function listToTokenMap(list: TokenList): TokenAddressMap {
+  const result = listCache?.get(list)
+  if (result) return result
+
+  const map = list.tokens.reduce<TokenAddressMap>(
+    (tokenMap, tokenInfo) => {
+      const token = new WrappedTokenInfo(tokenInfo)
+      if (tokenMap[token.chainId][token.address] !== undefined) throw Error('Duplicate tokens.')
+      return {
+        ...tokenMap,
+        [token.chainId]: {
+          ...tokenMap[token.chainId],
+          [token.address]: token
+        }
+      }
+    },
+    { ...EMPTY_LIST }
+  )
+  listCache?.set(list, map)
+  return map
+}
+
+export function useTokenList(url: string): TokenAddressMap {
+  const lists = useSelector<AppState, AppState['lists']['byUrl']>(state => state.lists.byUrl)
+  return useMemo(() => {
+    const current = lists[url]?.current
+    if (!current) return EMPTY_LIST
+    return listToTokenMap(current)
+  }, [lists, url])
+}
+
+export function useDefaultTokenList(): TokenAddressMap {
+  return useTokenList(DEFAULT_TOKEN_LIST_URL)
+}
+
+// returns all downloaded current lists
+export function useAllLists(): TokenList[] {
+  const lists = useSelector<AppState, AppState['lists']['byUrl']>(state => state.lists.byUrl)
+
+  return useMemo(
+    () =>
+      Object.keys(lists)
+        .map(url => lists[url].current)
+        .filter((l): l is TokenList => Boolean(l)),
+    [lists]
+  )
+}

src/state/lists/reducer.test.ts

+import { createStore, Store } from 'redux'
+import { fetchTokenList, acceptListUpdate, addList } from './actions'
+import reducer, { ListsState } from './reducer'
+
+const STUB_TOKEN_LIST = {
+  name: '',
+  timestamp: '',
+  version: { major: 1, minor: 1, patch: 1 },
+  tokens: []
+}
+
+const PATCHED_STUB_LIST = {
+  ...STUB_TOKEN_LIST,
+  version: { ...STUB_TOKEN_LIST.version, patch: STUB_TOKEN_LIST.version.patch + 1 }
+}
+const MINOR_UPDATED_STUB_LIST = {
+  ...STUB_TOKEN_LIST,
+  version: { ...STUB_TOKEN_LIST.version, minor: STUB_TOKEN_LIST.version.minor + 1 }
+}
+const MAJOR_UPDATED_STUB_LIST = {
+  ...STUB_TOKEN_LIST,
+  version: { ...STUB_TOKEN_LIST.version, major: STUB_TOKEN_LIST.version.major + 1 }
+}
+
+describe('list reducer', () => {
+  let store: Store<ListsState>
+
+  beforeEach(() => {
+    store = createStore(reducer, {
+      byUrl: {}
+    })
+  })
+
+  describe('fetchTokenList', () => {
+    describe('pending', () => {
+      it('sets pending', () => {
+        store.dispatch(fetchTokenList.pending('request-id', 'fake-url'))
+        expect(store.getState()).toEqual({
+          byUrl: {
+            'fake-url': {
+              error: null,
+              loadingRequestId: 'request-id',
+              current: null,
+              pendingUpdate: null
+            }
+          }
+        })
+      })
+
+      it('does not clear current list', () => {
+        store = createStore(reducer, {
+          byUrl: {
+            'fake-url': {
+              error: null,
+              current: STUB_TOKEN_LIST,
+              pendingUpdate: null,
+              loadingRequestId: null
+            }
+          }
+        })
+
+        store.dispatch(fetchTokenList.pending('request-id', 'fake-url'))
+        expect(store.getState()).toEqual({
+          byUrl: {
+            'fake-url': {
+              error: null,
+              current: STUB_TOKEN_LIST,
+              loadingRequestId: 'request-id',
+              pendingUpdate: null
+            }
+          }
+        })
+      })
+    })
+
+    describe('fulfilled', () => {
+      it('saves the list', () => {
+        store.dispatch(fetchTokenList.fulfilled(STUB_TOKEN_LIST, 'request-id', 'fake-url'))
+        expect(store.getState()).toEqual({
+          byUrl: {
+            'fake-url': {
+              error: null,
+              current: STUB_TOKEN_LIST,
+              loadingRequestId: null,
+              pendingUpdate: null
+            }
+          }
+        })
+      })
+
+      it('does not save the list in pending if current is same', () => {
+        store.dispatch(fetchTokenList.fulfilled(STUB_TOKEN_LIST, 'request-id', 'fake-url'))
+        store.dispatch(fetchTokenList.fulfilled(STUB_TOKEN_LIST, 'request-id', 'fake-url'))
+        expect(store.getState()).toEqual({
+          byUrl: {
+            'fake-url': {
+              error: null,
+              current: STUB_TOKEN_LIST,
+              loadingRequestId: null,
+              pendingUpdate: null
+            }
+          }
+        })
+      })
+
+      it('does not save to current if list is newer patch version', () => {
+        store.dispatch(fetchTokenList.fulfilled(STUB_TOKEN_LIST, 'request-id', 'fake-url'))
+
+        store.dispatch(fetchTokenList.fulfilled(PATCHED_STUB_LIST, 'request-id', 'fake-url'))
+        expect(store.getState()).toEqual({
+          byUrl: {
+            'fake-url': {
+              error: null,
+              current: STUB_TOKEN_LIST,
+              loadingRequestId: null,
+              pendingUpdate: PATCHED_STUB_LIST
+            }
+          }
+        })
+      })
+      it('does not save to current if list is newer minor version', () => {
+        store.dispatch(fetchTokenList.fulfilled(STUB_TOKEN_LIST, 'request-id', 'fake-url'))
+
+        store.dispatch(fetchTokenList.fulfilled(MINOR_UPDATED_STUB_LIST, 'request-id', 'fake-url'))
+        expect(store.getState()).toEqual({
+          byUrl: {
+            'fake-url': {
+              error: null,
+              current: STUB_TOKEN_LIST,
+              loadingRequestId: null,
+              pendingUpdate: MINOR_UPDATED_STUB_LIST
+            }
+          }
+        })
+      })
+      it('does not save to pending if list is newer major version', () => {
+        store.dispatch(fetchTokenList.fulfilled(STUB_TOKEN_LIST, 'request-id', 'fake-url'))
+
+        store.dispatch(fetchTokenList.fulfilled(MAJOR_UPDATED_STUB_LIST, 'request-id', 'fake-url'))
+        expect(store.getState()).toEqual({
+          byUrl: {
+            'fake-url': {
+              error: null,
+              current: STUB_TOKEN_LIST,
+              loadingRequestId: null,
+              pendingUpdate: MAJOR_UPDATED_STUB_LIST
+            }
+          }
+        })
+      })
+    })
+
+    describe('rejected', () => {
+      it('no-op if not loading', () => {
+        store.dispatch(fetchTokenList.rejected(new Error('abcd'), 'request-id', 'fake-url'))
+        expect(store.getState()).toEqual({
+          byUrl: {}
+        })
+      })
+
+      it('sets the error if loading', () => {
+        store = createStore(reducer, {
+          byUrl: {
+            'fake-url': {
+              error: null,
+              current: null,
+              loadingRequestId: 'request-id',
+              pendingUpdate: null
+            }
+          }
+        })
+        store.dispatch(fetchTokenList.rejected(new Error('abcd'), 'request-id', 'fake-url'))
+        expect(store.getState()).toEqual({
+          byUrl: {
+            'fake-url': {
+              error: 'abcd',
+              current: null,
+              loadingRequestId: null,
+              pendingUpdate: null
+            }
+          }
+        })
+      })
+    })
+  })
+
+  describe('addList', () => {
+    it('adds the list key to byUrl', () => {
+      store.dispatch(addList('list-id'))
+      expect(store.getState()).toEqual({
+        byUrl: {
+          'list-id': {
+            error: null,
+            current: null,
+            loadingRequestId: null,
+            pendingUpdate: null
+          }
+        }
+      })
+    })
+    it('no op for existing list', () => {
+      store = createStore(reducer, {
+        byUrl: {
+          'fake-url': {
+            error: null,
+            current: STUB_TOKEN_LIST,
+            loadingRequestId: null,
+            pendingUpdate: null
+          }
+        }
+      })
+      store.dispatch(addList('fake-url'))
+      expect(store.getState()).toEqual({
+        byUrl: {
+          'fake-url': {
+            error: null,
+            current: STUB_TOKEN_LIST,
+            loadingRequestId: null,
+            pendingUpdate: null
+          }
+        }
+      })
+    })
+  })
+
+  describe('acceptListUpdate', () => {
+    it('swaps pending update into current', () => {
+      store = createStore(reducer, {
+        byUrl: {
+          'fake-url': {
+            error: null,
+            current: STUB_TOKEN_LIST,
+            loadingRequestId: null,
+            pendingUpdate: PATCHED_STUB_LIST
+          }
+        }
+      })
+      store.dispatch(acceptListUpdate('fake-url'))
+      expect(store.getState()).toEqual({
+        byUrl: {
+          'fake-url': {
+            error: null,
+            current: PATCHED_STUB_LIST,
+            loadingRequestId: null,
+            pendingUpdate: null
+          }
+        }
+      })
+    })
+  })
+})

src/state/lists/reducer.ts

+import { createReducer } from '@reduxjs/toolkit'
+import { getVersionUpgrade, VersionUpgrade } from '@uniswap/token-lists'
+import { TokenList } from '@uniswap/token-lists/dist/types'
+import { acceptListUpdate, addList, fetchTokenList } from './actions'
+
+export interface ListsState {
+  readonly byUrl: {
+    readonly [url: string]: {
+      readonly current: TokenList | null
+      readonly pendingUpdate: TokenList | null
+      readonly loadingRequestId: string | null
+      readonly error: string | null
+    }
+  }
+}
+
+const initialState: ListsState = {
+  byUrl: {}
+}
+
+export default createReducer(initialState, builder =>
+  builder
+    .addCase(fetchTokenList.pending, (state, { meta: { arg: url, requestId } }) => {
+      state.byUrl[url] = {
+        current: null,
+        pendingUpdate: null,
+        ...state.byUrl[url],
+        loadingRequestId: requestId,
+        error: null
+      }
+    })
+    .addCase(fetchTokenList.fulfilled, (state, { payload: tokenList, meta: { arg: url } }) => {
+      const current = state.byUrl[url]?.current
+
+      // no-op if update does nothing
+      if (current) {
+        const type = getVersionUpgrade(current.version, tokenList.version)
+        if (type === VersionUpgrade.NONE) return
+        state.byUrl[url] = {
+          ...state.byUrl[url],
+          loadingRequestId: null,
+          error: null,
+          current: current,
+          pendingUpdate: tokenList
+        }
+      } else {
+        state.byUrl[url] = {
+          ...state.byUrl[url],
+          loadingRequestId: null,
+          error: null,
+          current: tokenList,
+          pendingUpdate: null
+        }
+      }
+    })
+    .addCase(fetchTokenList.rejected, (state, { error, meta: { requestId, arg: url } }) => {
+      if (state.byUrl[url]?.loadingRequestId !== requestId) {
+        // no-op since it's not the latest request
+        return
+      }
+
+      state.byUrl[url] = {
+        ...state.byUrl[url],
+        loadingRequestId: null,
+        error: error.message ?? 'Unknown error',
+        current: null,
+        pendingUpdate: null
+      }
+    })
+    .addCase(addList, (state, { payload: url }) => {
+      if (!state.byUrl[url]) {
+        state.byUrl[url] = {
+          loadingRequestId: null,
+          pendingUpdate: null,
+          current: null,
+          error: null
+        }
+      }
+    })
+    .addCase(acceptListUpdate, (state, { payload: url }) => {
+      if (!state.byUrl[url]?.pendingUpdate) {
+        throw new Error('accept list update called without pending update')
+      }
+      state.byUrl[url] = {
+        ...state.byUrl[url],
+        pendingUpdate: null,
+        current: state.byUrl[url].pendingUpdate
+      }
+    })
+)

src/state/lists/updater.ts

+import { getVersionUpgrade, minVersionBump, VersionUpgrade } from '@uniswap/token-lists'
+import { useEffect } from 'react'
+import { useDispatch, useSelector } from 'react-redux'
+import { DEFAULT_TOKEN_LIST_URL } from '../../constants'
+import { addPopup } from '../application/actions'
+import { AppDispatch, AppState } from '../index'
+import { acceptListUpdate, addList, fetchTokenList } from './actions'
+
+export default function Updater(): null {
+  const dispatch = useDispatch<AppDispatch>()
+  const lists = useSelector<AppState, AppState['lists']['byUrl']>(state => state.lists.byUrl)
+
+  // we should always fetch the default token list, so add it
+  useEffect(() => {
+    if (!lists[DEFAULT_TOKEN_LIST_URL]) dispatch(addList(DEFAULT_TOKEN_LIST_URL))
+  }, [dispatch, lists])
+
+  // on initial mount, refetch all the lists in storage
+  useEffect(() => {
+    Object.keys(lists).forEach(listUrl => dispatch(fetchTokenList(listUrl) as any))
+    // we only do this once
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [dispatch])
+
+  // whenever a list is not loaded and not loading, try again to load it
+  useEffect(() => {
+    Object.keys(lists).forEach(listUrl => {
+      const list = lists[listUrl]
+      if (!list.current && !list.loadingRequestId && !list.error) {
+        dispatch(fetchTokenList(listUrl) as any)
+      }
+    })
+  }, [dispatch, lists])
+
+  // automatically update lists if versions are minor/patch
+  useEffect(() => {
+    Object.keys(lists).forEach(listUrl => {
+      const list = lists[listUrl]
+      if (list.current && list.pendingUpdate) {
+        const bump = getVersionUpgrade(list.current.version, list.pendingUpdate.version)
+        switch (bump) {
+          case VersionUpgrade.NONE:
+            throw new Error('unexpected no version bump')
+          case VersionUpgrade.PATCH:
+          case VersionUpgrade.MINOR:
+          case VersionUpgrade.MAJOR:
+            const min = minVersionBump(list.current.tokens, list.pendingUpdate.tokens)
+            // automatically update minor/patch as long as bump matches the min update
+            if (bump >= min) {
+              dispatch(acceptListUpdate(listUrl))
+              dispatch(
+                addPopup({
+                  key: listUrl,
+                  content: {
+                    listUpdate: {
+                      listUrl,
+                      oldList: list.current,
+                      newList: list.pendingUpdate,
+                      auto: true
+                    }
+                  }
+                })
+              )
+            } else {
+              console.error(
+                `List at url ${listUrl} could not automatically update because the version bump was only PATCH/MINOR while the update had breaking changes and should have been MAJOR`
+              )
+            }
+            break
+
+          // this will be turned on later
+          // case VersionUpgrade.MAJOR:
+          // dispatch(
+          //   addPopup({
+          //     key: listUrl,
+          //     content: {
+          //       listUpdate: {
+          //         listUrl,
+          //         auto: false,
+          //         oldList: list.current,
+          //         newList: list.pendingUpdate
+          //       }
+          //     }
+          //   })
+          // )
+        }
+      }
+    })
+  }, [dispatch, lists])
+
+  return null
+}

src/state/transactions/updater.tsx

@@ -13,7 +13,7 @@ export default function Updater() {
   const dispatch = useDispatch<AppDispatch>()
   const transactions = useSelector<AppState, AppState['transactions']>(state => state.transactions)
 
-  const allTransactions = transactions[chainId ?? -1] ?? {}
+  const allTransactions = chainId ? transactions[chainId] ?? {} : {}
 
   // show popup on confirm
   const addPopup = useAddPopup()

src/state/user/hooks.tsx

@@ -214,7 +214,7 @@ export function useTrackedTokenPairs(): [Token, Token][] {
               (BASES_TO_TRACK_LIQUIDITY_FOR[chainId] ?? [])
                 // to construct pairs of the given token with each base
                 .map(base => {
-                  if (base.equals(token)) {
+                  if (base.address === token.address) {
                     return null
                   } else {
                     return [base, token]

src/state/user/reducer.test.ts

@@ -20,7 +20,11 @@ describe('swap reducer', () => {
       expect(store.getState().lastUpdateVersionTimestamp).toBeGreaterThanOrEqual(time)
     })
     it('sets allowed slippage and deadline', () => {
-      store = createStore(reducer, { ...initialState, userDeadline: undefined, userSlippageTolerance: undefined })
+      store = createStore(reducer, {
+        ...initialState,
+        userDeadline: undefined,
+        userSlippageTolerance: undefined
+      } as any)
       store.dispatch(updateVersion())
       expect(store.getState().userDeadline).toEqual(DEFAULT_DEADLINE_FROM_NOW)
       expect(store.getState().userSlippageTolerance).toEqual(INITIAL_ALLOWED_SLIPPAGE)

src/utils/index.ts

@@ -5,8 +5,8 @@ import { JsonRpcSigner, Web3Provider } from '@ethersproject/providers'
 import { BigNumber } from '@ethersproject/bignumber'
 import { abi as IUniswapV2Router02ABI } from '@uniswap/v2-periphery/build/IUniswapV2Router02.json'
 import { ROUTER_ADDRESS } from '../constants'
-import { ALL_TOKENS } from '../constants/tokens'
 import { ChainId, JSBI, Percent, Token, CurrencyAmount, Currency, ETHER } from '@uniswap/sdk'
+import { TokenAddressMap } from '../state/lists/hooks'
 
 // returns the checksummed address if the address is valid, otherwise returns false
 export function isAddress(value: any): string | false {
@@ -87,7 +87,7 @@ export function getContract(address: string, ABI: any, library: Web3Provider, ac
     throw Error(`Invalid 'address' parameter '${address}'.`)
   }
 
-  return new Contract(address, ABI, getProviderOrSigner(library, account))
+  return new Contract(address, ABI, getProviderOrSigner(library, account) as any)
 }
 
 // account is optional
@@ -99,12 +99,7 @@ export function escapeRegExp(string: string): string {
   return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&') // $& means the whole matched string
 }
 
-export function isDefaultToken(currency?: Currency): boolean {
+export function isDefaultToken(defaultTokens: TokenAddressMap, currency?: Currency): boolean {
   if (currency === ETHER) return true
-  return Boolean(currency instanceof Token && ALL_TOKENS[currency.chainId]?.[currency.address])
-}
-
-export function isCustomAddedToken(allTokens: { [address: string]: Token }, currency?: Currency): boolean {
-  const isDefault = isDefaultToken(currency)
-  return Boolean(!isDefault && currency instanceof Token && allTokens[currency.address])
+  return Boolean(currency instanceof Token && defaultTokens[currency.chainId]?.[currency.address])
 }

src/utils/uriToHttp.ts

+/**
+ * Given a URI that may be ipfs, or http, or an ENS name, return the fetchable http(s) URLs for the same content
+ * @param uri to convert to http url
+ */
+export default function uriToHttp(uri: string): string[] {
+  try {
+    const parsed = new URL(uri)
+    if (parsed.protocol === 'http:') {
+      return ['https' + uri.substr(4), uri]
+    } else if (parsed.protocol === 'https:') {
+      return [uri]
+    } else if (parsed.protocol === 'ipfs:') {
+      const hash = parsed.pathname.substring(2)
+      return [`https://cloudflare-ipfs.com/ipfs/${hash}/`, `https://ipfs.infura.io/ipfs/${hash}/`]
+    } else if (parsed.protocol === 'ipns:') {
+      const name = parsed.pathname.substring(2)
+      return [`https://cloudflare-ipfs.com/ipns/${name}/`, `https://ipfs.infura.io/ipns/${name}/`]
+    } else {
+      console.error('Unrecognized protocol', parsed)
+      return []
+    }
+  } catch (error) {
+    if (uri.toLowerCase().endsWith('.eth')) {
+      return [`https://${uri.toLowerCase()}.link`]
+    }
+    console.error('Failed to parse URI', error)
+    return []
+  }
+}

src/utils/v1SwapArgument.test.ts

 import { CurrencyAmount, ETHER, Percent, Route, TokenAmount, Trade } from '@uniswap/sdk'
-import { DAI, USDC } from '../constants/tokens/mainnet'
+import { DAI, USDC } from '../constants'
 import { MockV1Pair } from '../data/V1'
 import v1SwapArguments from './v1SwapArguments'