fix: added op and arb as base tokens (#6810)

* fix: added op and arb as base tokens

* fix: unit testing

src/constants/routing.test.ts

+import { SupportedChainId } from './chains'
+import { COMMON_BASES } from './routing'
+
+describe('Routing', () => {
+  describe('COMMON_BASES', () => {
+    it('contains all coins for mainnet', () => {
+      const symbols = COMMON_BASES[SupportedChainId.MAINNET].map((coin) => coin.symbol)
+      expect(symbols).toEqual(['ETH', 'DAI', 'USDC', 'USDT', 'WBTC', 'WETH'])
+    })
+    it('contains all coins for arbitrum', () => {
+      const symbols = COMMON_BASES[SupportedChainId.ARBITRUM_ONE].map((coin) => coin.symbol)
+      expect(symbols).toEqual(['ETH', 'ARB', 'DAI', 'USDC', 'USDT', 'WBTC', 'WETH'])
+    })
+    it('contains all coins for optimism', () => {
+      const symbols = COMMON_BASES[SupportedChainId.OPTIMISM].map((coin) => coin.symbol)
+      expect(symbols).toEqual(['ETH', 'OP', 'DAI', 'USDC', 'USDT', 'WBTC'])
+    })
+    it('contains all coins for polygon', () => {
+      const symbols = COMMON_BASES[SupportedChainId.POLYGON].map((coin) => coin.symbol)
+      expect(symbols).toEqual(['MATIC', 'WETH', 'USDC', 'DAI', 'USDT', 'WBTC'])
+    })
+    it('contains all coins for celo', () => {
+      const symbols = COMMON_BASES[SupportedChainId.CELO].map((coin) => coin.symbol)
+      expect(symbols).toEqual(['CELO', 'cEUR', 'cUSD', 'ETH', 'USDCet', 'cMCO2'])
+    })
+    it('contains all coins for bsc', () => {
+      const symbols = COMMON_BASES[SupportedChainId.BNB].map((coin) => coin.symbol)
+      expect(symbols).toEqual(['BNB', 'DAI', 'USDC', 'USDT', 'ETH', 'BTCB', 'BUSD'])
+    })
+  })
+})

src/constants/routing.ts

@@ -4,6 +4,7 @@ import { SupportedChainId } from 'constants/chains'
 
 import {
   AMPL,
+  ARB,
   BTC_BSC,
   BUSD_BSC,
   CAKE_BSC,
@@ -25,6 +26,7 @@ import {
   FXS,
   MATIC_BSC,
   nativeOnChain,
+  OP,
   PORTAL_ETH_CELO,
   PORTAL_USDC_CELO,
   renBTC,
@@ -152,6 +154,7 @@ export const COMMON_BASES: ChainCurrencyList = {
   ],
   [SupportedChainId.ARBITRUM_ONE]: [
     nativeOnChain(SupportedChainId.ARBITRUM_ONE),
+    ARB,
     DAI_ARBITRUM_ONE,
     USDC_ARBITRUM,
     USDT_ARBITRUM_ONE,
@@ -165,6 +168,7 @@ export const COMMON_BASES: ChainCurrencyList = {
   ],
   [SupportedChainId.OPTIMISM]: [
     nativeOnChain(SupportedChainId.OPTIMISM),
+    OP,
     DAI_OPTIMISM,
     USDC_OPTIMISM,
     USDT_OPTIMISM,

src/constants/tokens.ts

@@ -400,6 +400,14 @@ export const ARB = new Token(
   'Arbitrum'
 )
 
+export const OP = new Token(
+  SupportedChainId.OPTIMISM,
+  '0x4200000000000000000000000000000000000042',
+  18,
+  'OP',
+  'Optimism'
+)
+
 export const WRAPPED_NATIVE_CURRENCY: { [chainId: number]: Token | undefined } = {
   ...(WETH9 as Record<SupportedChainId, Token>),
   [SupportedChainId.OPTIMISM]: new Token(