fix additional base currency toggle bugs

src/pages/AddLiquidity/index.tsx

@@ -89,6 +89,7 @@ export default function AddLiquidity({
     [currencyA, currencyB, baseCurrency]
   )
 
+  // url params are the source truth, so we have to do this
   useEffect(() => {
     setBaseCurrency(currencyA)
     return () => {
@@ -449,7 +450,8 @@ export default function AddLiquidity({
                             handleRateToggle={() => {
                               onLeftRangeInput('')
                               onRightRangeInput('')
-                              setBaseCurrency(quoteCurrency)
+                              console.log('test')
+                              history.push(`/add/${currencyIdB as string}/${currencyIdA as string}`)
                             }}
                           />
                         ) : null}
@@ -490,7 +492,8 @@ export default function AddLiquidity({
                         handleRateToggle={() => {
                           onLeftRangeInput('')
                           onRightRangeInput('')
-                          setBaseCurrency(quoteCurrency)
+                          console.log('test')
+                          history.push(`/add/${currencyIdB as string}/${currencyIdA as string}`)
                         }}
                       />
                     ) : null}

src/pages/MigrateV2/MigrateV2Pair.tsx

-import React, { useCallback, useEffect, useMemo, useState } from 'react'
+import React, { useCallback, useMemo, useState } from 'react'
 import { Fraction, Price, Token, TokenAmount, WETH9 } from '@uniswap/sdk-core'
 import { FACTORY_ADDRESS, JSBI } from '@uniswap/v2-sdk'
 import { Redirect, RouteComponentProps } from 'react-router'
@@ -163,11 +163,6 @@ function V2PairMigration({
     baseToken
   )
 
-  // reset the initial state, dont need cleanup token always defined
-  useEffect(() => {
-    setBaseToken(token0)
-  }, [baseToken, token0])
-
   // get value and prices at ticks
   const { [Bound.LOWER]: tickLower, [Bound.UPPER]: tickUpper } = ticks
   const { [Bound.LOWER]: priceLower, [Bound.UPPER]: priceUpper } = pricesAtTicks