Polygon support (#32)

* adding polygon tests

* add axios retry

lib/cron/cache-config.ts

@@ -18,6 +18,11 @@ export const chainProtocols = [
     chainId: ChainId.ARBITRUM_ONE,
     provider: new V3SubgraphProvider(ChainId.ARBITRUM_ONE, 3, 90000),
   },
+  {
+    protocol: Protocol.V3,
+    chainId: ChainId.POLYGON,
+    provider: new V3SubgraphProvider(ChainId.POLYGON, 3, 90000),
+  },
   // Currently there is no working V3 subgraph for Gorli, Kovan, Optimism, Optimism Kovan, Arbitrum Rinkeby, so we use static providers.
   // V2.
   {

lib/handlers/injector-sor.ts

@@ -46,6 +46,8 @@ export const SUPPORTED_CHAINS: ChainId[] = [
   ChainId.OPTIMISTIC_KOVAN,
   ChainId.ARBITRUM_ONE,
   ChainId.ARBITRUM_RINKEBY,
+  ChainId.POLYGON,
+  ChainId.POLYGON_MUMBAI,
   // leaving goerli out for now
 ]
 const DEFAULT_TOKEN_LIST = 'https://gateway.ipfs.io/ipns/tokens.uniswap.org'

lib/handlers/shared.ts

@@ -1,5 +1,12 @@
-import { Currency, Ether } from '@uniswap/sdk-core'
-import { AlphaRouterConfig, ChainId, ITokenListProvider, ITokenProvider } from '@uniswap/smart-order-router'
+import { Currency } from '@uniswap/sdk-core'
+import {
+  AlphaRouterConfig,
+  ChainId,
+  ITokenListProvider,
+  ITokenProvider,
+  NativeCurrencyName,
+  nativeOnChain,
+} from '@uniswap/smart-order-router'
 import Logger from 'bunyan'
 
 export const DEFAULT_ROUTING_CONFIG_BY_CHAIN = (chainId: ChainId): AlphaRouterConfig => {
@@ -95,8 +102,12 @@ export async function tokenStringToCurrency(
 
   let token: Currency | undefined = undefined
 
-  if (tokenRaw == 'ETH' || tokenRaw.toLowerCase() == '0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee') {
-    token = Ether.onChain(chainId)
+  if (
+    tokenRaw == NativeCurrencyName.ETHER ||
+    tokenRaw == NativeCurrencyName.MATIC ||
+    tokenRaw.toLowerCase() == '0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee'
+  ) {
+    token = nativeOnChain(chainId)
   } else if (isAddress(tokenRaw)) {
     token = await tokenListProvider.getTokenByAddress(tokenRaw)
   }

package.json

@@ -34,6 +34,7 @@
     "@types/uuid": "^8.3.0",
     "@typescript-eslint/eslint-plugin": "^4.0.1",
     "@typescript-eslint/parser": "^4.0.1",
+    "axios-retry": "^3.2.4",
     "chai": "^4.3.4",
     "chai-as-promised": "^7.1.1",
     "chai-subset": "^1.6.0",
@@ -90,7 +91,7 @@
     "@types/stats-lite": "^2.2.0",
     "@uniswap/router-sdk": "^1.0.1",
     "@uniswap/sdk-core": "^3.0.1",
-    "@uniswap/smart-order-router": "^2.5.4",
+    "@uniswap/smart-order-router": "^2.5.7",
     "@uniswap/token-lists": "^1.0.0-beta.24",
     "@uniswap/v3-periphery": "^1.1.0",
     "@uniswap/v3-sdk": "^3.7.1",