From 4d3ed5d6ba6560e0778aa543dc81e79fa5fe71e7 Mon Sep 17 00:00:00 2001
From: Justin Domingue <judo@uniswap.org>
Date: Wed, 21 Jul 2021 15:08:35 -0700
Subject: [PATCH] feat: routing api integration (#2080)

* initial routing api integration

* add routing api slice

* display route in dialog

* addressed pr feedback

* switch to `get`

* renamed useRouterTradeExactIn to useRouter

* moving few files to later iteration

* removed unnecessary `as`

* switch to polling

* add todo for blocknumber freshness

* remove account-slippage-deadline
---
 package.json               |  2 +-
 src/hooks/useRouter.ts     | 30 +++++++++++++++++++++
 src/state/index.ts         |  9 ++++---
 src/state/routing/slice.ts | 54 ++++++++++++++++++++++++++++++++++++++
 yarn.lock                  |  8 +++---
 5 files changed, 95 insertions(+), 8 deletions(-)
 create mode 100644 src/hooks/useRouter.ts
 create mode 100644 src/state/routing/slice.ts

diff --git a/package.json b/package.json
index c539eead0d..1b60cd88e5 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "@reach/dialog": "^0.10.3",
     "@reach/portal": "^0.10.3",
     "@react-hook/window-scroll": "^1.3.0",
-    "@reduxjs/toolkit": "^1.6.0",
+    "@reduxjs/toolkit": "^1.6.1",
     "@typechain/ethers-v5": "^7.0.0",
     "@types/d3": "^6.7.1",
     "@types/jest": "^25.2.1",
diff --git a/src/hooks/useRouter.ts b/src/hooks/useRouter.ts
new file mode 100644
index 0000000000..08aa614700
--- /dev/null
+++ b/src/hooks/useRouter.ts
@@ -0,0 +1,30 @@
+import { skipToken } from '@reduxjs/toolkit/query/react'
+import { Currency, CurrencyAmount } from '@uniswap/sdk-core'
+import ms from 'ms.macro'
+import { useBlockNumber } from 'state/application/hooks'
+import { useGetQuoteQuery } from 'state/routing/slice'
+import { useActiveWeb3React } from './web3'
+
+export function useRouterTradeExactIn(amountIn?: CurrencyAmount<Currency>, currencyOut?: Currency) {
+  const { account } = useActiveWeb3React()
+
+  const blockNumber = useBlockNumber()
+
+  const { isLoading, isError, data } = useGetQuoteQuery(
+    amountIn && currencyOut && account && blockNumber
+      ? {
+          tokenInAddress: amountIn.currency.wrapped.address,
+          tokenInChainId: amountIn.currency.chainId,
+          tokenOutAddress: currencyOut.wrapped.address,
+          tokenOutChainId: currencyOut.chainId,
+          amount: amountIn.quotient.toString(),
+          type: 'exactIn',
+        }
+      : skipToken,
+    { pollingInterval: ms`10s` }
+  )
+
+  // todo(judo): validate block number for freshness
+
+  return !isLoading && !isError ? data?.routeString : undefined
+}
diff --git a/src/state/index.ts b/src/state/index.ts
index 4d6975ee0c..9ac0d99961 100644
--- a/src/state/index.ts
+++ b/src/state/index.ts
@@ -13,7 +13,8 @@ import burn from './burn/reducer'
 import burnV3 from './burn/v3/reducer'
 import logs from './logs/slice'
 import multicall from './multicall/reducer'
-import { api } from './data/slice'
+import { api as dataApi } from './data/slice'
+import { routingApi } from './routing/slice'
 
 const PERSISTED_KEYS: string[] = ['user', 'transactions', 'lists']
 
@@ -30,11 +31,13 @@ const store = configureStore({
     multicall,
     lists,
     logs,
-    [api.reducerPath]: api.reducer,
+    [dataApi.reducerPath]: dataApi.reducer,
+    [routingApi.reducerPath]: routingApi.reducer,
   },
   middleware: (getDefaultMiddleware) =>
     getDefaultMiddleware({ thunk: true })
-      .concat(api.middleware)
+      .concat(dataApi.middleware)
+      .concat(routingApi.middleware)
       .concat(save({ states: PERSISTED_KEYS, debounce: 1000 })),
   preloadedState: load({ states: PERSISTED_KEYS }),
 })
diff --git a/src/state/routing/slice.ts b/src/state/routing/slice.ts
new file mode 100644
index 0000000000..7dbe483124
--- /dev/null
+++ b/src/state/routing/slice.ts
@@ -0,0 +1,54 @@
+import { createApi, fetchBaseQuery } from '@reduxjs/toolkit/query/react'
+import { SupportedChainId } from 'constants/chains'
+import qs from 'qs'
+
+export interface GetQuoteResult {
+  blockNumber: string
+  gasPriceWei: string
+  gasUseEstimate: string
+  gasUseEstimateQuote: string
+  gasUseEstimateQuoteDecimals: string
+  gasUseEstimateUSD: string
+  methodParameters: { calldata: string; value: string }
+  quote: string
+  quoteDecimals: string
+  quoteGasAdjusted: string
+  quoteGasAdjustedDecimals: string
+  quoteId: string
+  routeEdges: {
+    fee: string
+    id: string
+    inId: string
+    outId: string
+    percent: number
+    type: string
+  }[]
+  routeNodes: { chainId: number; id: string; symbol: string; type: string }[]
+  routeString: string
+}
+
+export const routingApi = createApi({
+  baseQuery: fetchBaseQuery({
+    baseUrl: 'https://api.uniswap.org/v1/',
+  }),
+  endpoints: (build) => ({
+    getQuote: build.query<
+      GetQuoteResult,
+      {
+        tokenInAddress: string
+        tokenInChainId: SupportedChainId
+        tokenOutAddress: string
+        tokenOutChainId: SupportedChainId
+        amount: string
+        type: 'exactIn' | 'exactOut'
+        recipient?: string
+        slippageTolerance?: string
+        deadline?: string
+      }
+    >({
+      query: (args) => `quote?${qs.stringify(args)}`,
+    }),
+  }),
+})
+
+export const { useGetQuoteQuery } = routingApi
diff --git a/yarn.lock b/yarn.lock
index c60838a8ce..1e8d212429 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2847,10 +2847,10 @@
     "@react-hook/event" "^1.2.1"
     "@react-hook/throttle" "^2.2.0"
 
-"@reduxjs/toolkit@^1.6.0":
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/@reduxjs/toolkit/-/toolkit-1.6.0.tgz#0a17c6941c57341f8b31e982352b495ab69d5add"
-  integrity sha512-eGL50G+Vj5AG5uD0lineb6rRtbs96M8+hxbcwkHpZ8LQcmt0Bm33WyBSnj5AweLkjQ7ZP+KFRDHiLMznljRQ3A==
+"@reduxjs/toolkit@^1.6.1":
+  version "1.6.1"
+  resolved "https://registry.yarnpkg.com/@reduxjs/toolkit/-/toolkit-1.6.1.tgz#7bc83b47352a663bf28db01e79d17ba54b98ade9"
+  integrity sha512-pa3nqclCJaZPAyBhruQtiRwtTjottRrVJqziVZcWzI73i6L3miLTtUyWfauwv08HWtiXLx1xGyGt+yLFfW/d0A==
   dependencies:
     immer "^9.0.1"
     redux "^4.1.0"