add additional bases (#1363)

* add routing token

* add logic for additional bases

* update address

src/constants/index.ts

@@ -19,6 +19,11 @@ export const DAI = new Token(ChainId.MAINNET, '0x6B175474E89094C44Da98b954EedeAC
 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 WBTC = new Token(ChainId.MAINNET, '0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599', 8, 'WBTC', 'Wrapped BTC')
+export const FEI = new Token(ChainId.MAINNET, '0x956F47F50A910163D8BF957Cf5846D573E7f87CA', 18, 'FEI', 'Fei USD')
+export const TRIBE = new Token(ChainId.MAINNET, '0xc7283b66Eb1EB5FB86327f08e1B5816b0720212B', 18, 'TRIBE', 'Tribe')
+export const FRAX = new Token(ChainId.MAINNET, '0x853d955aCEf822Db058eb8505911ED77F175b99e', 18, 'FRAX', 'Frax')
+export const FXS = new Token(ChainId.MAINNET, '0x3432B6A60D23Ca0dFCa7761B7ab56459D9C964D0', 18, 'FXS', 'Frax Share')
+export const renBTC = new Token(ChainId.MAINNET, '0xEB4C2781e4ebA804CE9a9803C67d0893436bB27D', 8, 'renBTC', 'renBTC')
 
 // Block time here is slightly higher (~1s) than average in order to avoid ongoing proposals past the displayed time
 export const AVERAGE_BLOCK_TIME_IN_SECS = 13
@@ -63,6 +68,18 @@ export const BASES_TO_CHECK_TRADES_AGAINST: ChainTokenList = {
   [ChainId.MAINNET]: [...WETH_ONLY[ChainId.MAINNET], DAI, USDC, USDT, WBTC]
 }
 
+export const ADDITIONAL_BASES: { [chainId in ChainId]?: { [tokenAddress: string]: Token[] } } = {
+  [ChainId.MAINNET]: {
+    '0xA948E86885e12Fb09AfEF8C52142EBDbDf73cD18': [new Token(ChainId.MAINNET, UNI_ADDRESS, 18, 'UNI', 'Uniswap')],
+    [FEI.address]: [TRIBE],
+    [TRIBE.address]: [FEI],
+    [FRAX.address]: [FXS],
+    [FXS.address]: [FRAX],
+    [WBTC.address]: [renBTC],
+    [renBTC.address]: [WBTC]
+  }
+}
+
 /**
  * Some tokens can only be swapped via certain pairs, so we override the list of bases that are considered for these
  * tokens.

src/hooks/Trades.ts

@@ -3,7 +3,12 @@ import { Currency, CurrencyAmount, Pair, Token, Trade } from '@uniswap/sdk'
 import flatMap from 'lodash.flatmap'
 import { useMemo } from 'react'
 
-import { BASES_TO_CHECK_TRADES_AGAINST, CUSTOM_BASES, BETTER_TRADE_LESS_HOPS_THRESHOLD } from '../constants'
+import {
+  BASES_TO_CHECK_TRADES_AGAINST,
+  CUSTOM_BASES,
+  BETTER_TRADE_LESS_HOPS_THRESHOLD,
+  ADDITIONAL_BASES
+} from '../constants'
 import { PairState, usePairs } from '../data/Reserves'
 import { wrappedCurrency } from '../utils/wrappedCurrency'
 
@@ -14,17 +19,22 @@ import { useUserSingleHopOnly } from 'state/user/hooks'
 function useAllCommonPairs(currencyA?: Currency, currencyB?: Currency): Pair[] {
   const { chainId } = useActiveWeb3React()
 
-  const bases: Token[] = chainId ? BASES_TO_CHECK_TRADES_AGAINST[chainId] : []
-
   const [tokenA, tokenB] = chainId
     ? [wrappedCurrency(currencyA, chainId), wrappedCurrency(currencyB, chainId)]
     : [undefined, undefined]
 
+  const bases: Token[] = useMemo(() => {
+    if (!chainId) return []
+
+    const common = BASES_TO_CHECK_TRADES_AGAINST[chainId] ?? []
+    const additionalA = tokenA ? ADDITIONAL_BASES[chainId]?.[tokenA.address] ?? [] : []
+    const additionalB = tokenB ? ADDITIONAL_BASES[chainId]?.[tokenB.address] ?? [] : []
+
+    return [...common, ...additionalA, ...additionalB]
+  }, [chainId, tokenA, tokenB])
+
   const basePairs: [Token, Token][] = useMemo(
-    () =>
-      flatMap(bases, (base): [Token, Token][] => bases.map(otherBase => [base, otherBase])).filter(
-        ([t0, t1]) => t0.address !== t1.address
-      ),
+    () => flatMap(bases, (base): [Token, Token][] => bases.map(otherBase => [base, otherBase])),
     [bases]
   )
 
@@ -46,10 +56,9 @@ function useAllCommonPairs(currencyA?: Currency, currencyB?: Currency): Pair[] {
             .filter(([tokenA, tokenB]) => {
               if (!chainId) return true
               const customBases = CUSTOM_BASES[chainId]
-              if (!customBases) return true
 
-              const customBasesA: Token[] | undefined = customBases[tokenA.address]
-              const customBasesB: Token[] | undefined = customBases[tokenB.address]
+              const customBasesA: Token[] | undefined = customBases?.[tokenA.address]
+              const customBasesB: Token[] | undefined = customBases?.[tokenB.address]
 
               if (!customBasesA && !customBasesB) return true