feat(widgets): support convenience fee in trades (#3219)

* feat(widgets): support convenience fee in trades

* update call signature

* pr feedback

src/hooks/useSwapCallArguments.tsx

@@ -2,7 +2,7 @@ import { BigNumber } from '@ethersproject/bignumber'
 import { SwapRouter, Trade } from '@uniswap/router-sdk'
 import { Currency, Percent, TradeType } from '@uniswap/sdk-core'
 import { Router as V2SwapRouter, Trade as V2Trade } from '@uniswap/v2-sdk'
-import { SwapRouter as V3SwapRouter, Trade as V3Trade } from '@uniswap/v3-sdk'
+import { FeeOptions, SwapRouter as V3SwapRouter, Trade as V3Trade } from '@uniswap/v3-sdk'
 import { SWAP_ROUTER_ADDRESSES, V3_ROUTER_ADDRESS } from 'constants/addresses'
 import useActiveWeb3React from 'hooks/useActiveWeb3React'
 import { useMemo } from 'react'
@@ -36,7 +36,8 @@ export function useSwapCallArguments(
   allowedSlippage: Percent,
   recipientAddressOrName: string | null | undefined,
   signatureData: SignatureData | null | undefined,
-  deadline: BigNumber | undefined
+  deadline: BigNumber | undefined,
+  fee: FeeOptions | undefined
 ): SwapCall[] {
   const { account, chainId, library } = useActiveWeb3React()
 
@@ -98,6 +99,7 @@ export function useSwapCallArguments(
     } else {
       // swap options shared by v3 and v2+v3 swap routers
       const sharedSwapOptions = {
+        fee,
         recipient,
         slippageTolerance: allowedSlippage,
         ...(signatureData
@@ -167,15 +169,16 @@ export function useSwapCallArguments(
       ]
     }
   }, [
-    trade,
-    recipient,
-    library,
     account,
+    allowedSlippage,
+    argentWalletContract,
     chainId,
     deadline,
+    fee,
+    library,
+    recipient,
     routerContract,
-    allowedSlippage,
-    argentWalletContract,
     signatureData,
+    trade,
   ])
 }

src/hooks/useSwapCallback.tsx

@@ -33,7 +33,7 @@ export function useSwapCallback(
     state,
     callback: libCallback,
     error,
-  } = useLibSwapCallBack(trade, allowedSlippage, recipient, signatureData, deadline)
+  } = useLibSwapCallBack({ trade, allowedSlippage, recipientAddressOrName: recipient, signatureData, deadline })
 
   const callback = useMemo(() => {
     if (!libCallback || !trade) {

src/lib/components/Swap/SwapButton.tsx

@@ -51,6 +51,7 @@ export default function SwapButton({ disabled }: SwapButtonProps) {
     currencies: { [Field.INPUT]: inputCurrency },
     currencyBalances: { [Field.INPUT]: inputCurrencyBalance },
     currencyAmounts: { [Field.INPUT]: inputCurrencyAmount, [Field.OUTPUT]: outputCurrencyAmount },
+    fee,
   } = useSwapInfo()
 
   const independentField = useAtomValue(independentFieldAtom)
@@ -118,13 +119,14 @@ export default function SwapButton({ disabled }: SwapButtonProps) {
   const { signatureData } = useERC20PermitFromTrade(optimizedTrade, allowedSlippage, deadline)
 
   // the callback to execute the swap
-  const { callback: swapCallback } = useSwapCallback(
-    optimizedTrade,
+  const { callback: swapCallback } = useSwapCallback({
+    trade: optimizedTrade,
     allowedSlippage,
-    account ?? null,
+    recipientAddressOrName: account ?? null,
     signatureData,
-    deadline
-  )
+    deadline,
+    fee,
+  })
 
   //@TODO(ianlapham): add a loading state, process errors
   const setDisplayTxHash = useUpdateAtom(displayTxHashAtom)

src/lib/components/Swap/index.tsx

@@ -1,8 +1,9 @@
 import { Trans } from '@lingui/macro'
 import { TokenInfo } from '@uniswap/token-lists'
 import { useAtom } from 'jotai'
-import useSwapDefaults from 'lib/hooks/swap/useSwapDefaults'
 import { SwapInfoUpdater } from 'lib/hooks/swap/useSwapInfo'
+import useSyncConvenienceFee from 'lib/hooks/swap/useSyncConvenienceFee'
+import useSyncSwapDefaults from 'lib/hooks/swap/useSyncSwapDefaults'
 import { usePendingTransactions } from 'lib/hooks/transactions'
 import useActiveWeb3React from 'lib/hooks/useActiveWeb3React'
 import useTokenList from 'lib/hooks/useTokenList'
@@ -47,7 +48,8 @@ export interface SwapProps {
 
 export default function Swap(props: SwapProps) {
   useTokenList(props.tokenList)
-  useSwapDefaults(props)
+  useSyncSwapDefaults(props)
+  useSyncConvenienceFee(props)
 
   const { active, account } = useActiveWeb3React()
   const [boundary, setBoundary] = useState<HTMLDivElement | null>(null)

src/lib/hooks/swap/useSwapCallback.tsx

@@ -3,6 +3,7 @@ import { BigNumber } from '@ethersproject/bignumber'
 import { TransactionResponse } from '@ethersproject/providers'
 import { Trans } from '@lingui/macro'
 import { Percent } from '@uniswap/sdk-core'
+import { FeeOptions } from '@uniswap/v3-sdk'
 import useActiveWeb3React from 'hooks/useActiveWeb3React'
 import useENS from 'hooks/useENS'
 import { SignatureData } from 'hooks/useERC20Permit'
@@ -17,18 +18,33 @@ export enum SwapCallbackState {
   VALID,
 }
 
+interface UseSwapCallbackReturns {
+  state: SwapCallbackState
+  callback: null | (() => Promise<TransactionResponse>)
+  error: ReactNode | null
+}
+interface UseSwapCallbackArgs {
+  trade: AnyTrade | undefined // trade to execute, required
+  allowedSlippage: Percent // in bips
+  recipientAddressOrName: string | null | undefined // the ENS name or address of the recipient of the trade, or null if swap should be returned to sender
+  signatureData: SignatureData | null | undefined
+  deadline: BigNumber | undefined
+  fee?: FeeOptions
+}
+
 // returns a function that will execute a swap, if the parameters are all valid
 // and the user has approved the slippage adjusted input amount for the trade
-export function useSwapCallback(
-  trade: AnyTrade | undefined, // trade to execute, required
-  allowedSlippage: Percent, // in bips
-  recipientAddressOrName: string | null | undefined, // the ENS name or address of the recipient of the trade, or null if swap should be returned to sender
-  signatureData: SignatureData | null | undefined,
-  deadline: BigNumber | undefined
-): { state: SwapCallbackState; callback: null | (() => Promise<TransactionResponse>); error: ReactNode | null } {
+export function useSwapCallback({
+  trade,
+  allowedSlippage,
+  recipientAddressOrName,
+  signatureData,
+  deadline,
+  fee,
+}: UseSwapCallbackArgs): UseSwapCallbackReturns {
   const { account, chainId, library } = useActiveWeb3React()
 
-  const swapCalls = useSwapCallArguments(trade, allowedSlippage, recipientAddressOrName, signatureData, deadline)
+  const swapCalls = useSwapCallArguments(trade, allowedSlippage, recipientAddressOrName, signatureData, deadline, fee)
   const { callback } = useSendSwapTransaction(account, chainId, library, trade, swapCalls)
 
   const { address: recipientAddress } = useENS(recipientAddressOrName)

src/lib/hooks/swap/useSwapInfo.tsx

@@ -1,11 +1,12 @@
 import { Trans } from '@lingui/macro'
 import { Currency, CurrencyAmount, Percent, TradeType } from '@uniswap/sdk-core'
+import { FeeOptions } from '@uniswap/v3-sdk'
 import useAutoSlippageTolerance from 'hooks/useAutoSlippageTolerance'
 import { atom } from 'jotai'
 import { useAtomValue, useUpdateAtom } from 'jotai/utils'
 import { useCurrencyBalances } from 'lib/hooks/useCurrencyBalance'
 import { maxSlippageAtom } from 'lib/state/settings'
-import { Field, swapAtom } from 'lib/state/swap'
+import { DEFAULT_FEE_OPTIONS, feeOptionsAtom, Field, swapAtom } from 'lib/state/swap'
 import tryParseCurrencyAmount from 'lib/utils/tryParseCurrencyAmount'
 import { ReactNode, useEffect, useMemo } from 'react'
 import { InterfaceTrade, TradeState } from 'state/routing/types'
@@ -23,6 +24,7 @@ interface SwapInfo {
     state: TradeState
   }
   allowedSlippage: Percent
+  fee: FeeOptions
 }
 
 const BAD_RECIPIENT_ADDRESSES: { [address: string]: true } = {
@@ -42,6 +44,8 @@ function useComputeSwapInfo(): SwapInfo {
     [Field.OUTPUT]: outputCurrency,
   } = useAtomValue(swapAtom)
 
+  const fee = useAtomValue(feeOptionsAtom)
+
   const to = account
 
   const relevantTokenBalances = useCurrencyBalances(
@@ -139,8 +143,9 @@ function useComputeSwapInfo(): SwapInfo {
       inputError,
       trade,
       allowedSlippage,
+      fee,
     }),
-    [currencies, currencyBalances, currencyAmounts, inputError, trade, allowedSlippage]
+    [currencies, currencyBalances, currencyAmounts, inputError, trade, allowedSlippage, fee]
   )
 }
 
@@ -150,6 +155,7 @@ const swapInfoAtom = atom<SwapInfo>({
   currencyAmounts: {},
   trade: { state: TradeState.INVALID },
   allowedSlippage: new Percent(0),
+  fee: DEFAULT_FEE_OPTIONS,
 })
 
 export function SwapInfoUpdater() {

src/lib/hooks/swap/useSyncConvenienceFee.ts

@@ -0,0 +1,35 @@
+import { Percent } from '@uniswap/sdk-core'
+import useActiveWeb3React from 'hooks/useActiveWeb3React'
+import { useUpdateAtom } from 'jotai/utils'
+import { DEFAULT_FEE_OPTIONS, feeOptionsAtom } from 'lib/state/swap'
+import { useEffect } from 'react'
+
+interface FeeOptionsArgs {
+  convenienceFee?: number
+  convenienceFeeRecipient?: string | string | { [chainId: number]: string }
+}
+
+export default function useSyncConvenienceFee({ convenienceFee, convenienceFeeRecipient }: FeeOptionsArgs) {
+  const { chainId } = useActiveWeb3React()
+  const updateFeeOptions = useUpdateAtom(feeOptionsAtom)
+
+  useEffect(() => {
+    if (convenienceFee && convenienceFeeRecipient) {
+      if (typeof convenienceFeeRecipient === 'string') {
+        updateFeeOptions({
+          fee: new Percent(convenienceFee, 10_000),
+          recipient: convenienceFeeRecipient,
+        })
+        return
+      }
+      if (chainId && convenienceFeeRecipient[chainId]) {
+        updateFeeOptions({
+          fee: new Percent(convenienceFee, 10_000),
+          recipient: convenienceFeeRecipient[chainId],
+        })
+        return
+      }
+    }
+    updateFeeOptions(DEFAULT_FEE_OPTIONS)
+  }, [chainId, convenienceFee, convenienceFeeRecipient, updateFeeOptions])
+}

src/lib/hooks/swap/useSwapDefaults.ts → src/lib/hooks/swap/useSyncSwapDefaults.ts

@@ -31,7 +31,7 @@ interface UseSwapDefaultsArgs {
   defaultOutputAmount?: string
 }
 
-export default function useSwapDefaults({
+export default function useSyncSwapDefaults({
   defaultInputAddress,
   defaultInputAmount,
   defaultOutputAddress,

src/lib/state/swap.ts

@@ -1,4 +1,5 @@
-import { Currency } from '@uniswap/sdk-core'
+import { Currency, Percent } from '@uniswap/sdk-core'
+import { FeeOptions } from '@uniswap/v3-sdk'
 import { SupportedChainId } from 'constants/chains'
 import { nativeOnChain } from 'constants/tokens'
 import { atom } from 'jotai'
@@ -27,3 +28,9 @@ export const independentFieldAtom = pickAtom(swapAtom, 'independentField')
 
 // If set to a transaction hash, that transaction will display in a status dialog.
 export const displayTxHashAtom = atom<string | undefined>(undefined)
+
+export const DEFAULT_FEE_OPTIONS = {
+  fee: new Percent(0),
+  recipient: '',
+}
+export const feeOptionsAtom = atom<FeeOptions>(DEFAULT_FEE_OPTIONS)