chore(strict): strict connectors directory

src/connectors/Fortmatic.ts

+import { ChainId } from '@uniswap/sdk'
 import { FortmaticConnector as FortmaticConnectorCore } from '@web3-react/fortmatic-connector'
 
 export const OVERLAY_READY = 'OVERLAY_READY'
 
-const chainIdToNetwork = {
-  1: 'mainnet',
-  3: 'ropsten',
-  4: 'rinkeby',
-  42: 'kovan'
+type FormaticSupportedChains = Extract<ChainId, ChainId.MAINNET | ChainId.ROPSTEN | ChainId.RINKEBY | ChainId.KOVAN>
+
+const CHAIN_ID_NETWORK_ARGUMENT: { readonly [chainId in FormaticSupportedChains]: string | undefined } = {
+  [ChainId.MAINNET]: undefined,
+  [ChainId.ROPSTEN]: 'ropsten',
+  [ChainId.RINKEBY]: 'rinkeby',
+  [ChainId.KOVAN]: 'kovan'
 }
 
 export class FortmaticConnector extends FortmaticConnectorCore {
@@ -14,7 +17,11 @@ export class FortmaticConnector extends FortmaticConnectorCore {
     if (!this.fortmatic) {
       const { default: Fortmatic } = await import('fortmatic')
       const { apiKey, chainId } = this as any
-      this.fortmatic = new Fortmatic(apiKey, chainId === 1 || chainId === 4 ? undefined : chainIdToNetwork[chainId])
+      if (chainId in CHAIN_ID_NETWORK_ARGUMENT) {
+        this.fortmatic = new Fortmatic(apiKey, CHAIN_ID_NETWORK_ARGUMENT[chainId as FormaticSupportedChains])
+      } else {
+        throw new Error(`Unsupported network ID: ${chainId}`)
+      }
     }
 
     const provider = this.fortmatic.getProvider()
@@ -29,7 +36,10 @@ export class FortmaticConnector extends FortmaticConnectorCore {
       }, 200)
     })
 
-    const [account] = await Promise.all([provider.enable().then(accounts => accounts[0]), pollForOverlayReady])
+    const [account] = await Promise.all([
+      provider.enable().then((accounts: string[]) => accounts[0]),
+      pollForOverlayReady
+    ])
 
     return { provider: this.fortmatic.getProvider(), chainId: (this as any).chainId, account }
   }

src/connectors/fortmatic.d.ts

+declare module 'formatic'

src/connectors/index.ts

@@ -8,6 +8,12 @@ import { FortmaticConnector } from './Fortmatic'
 
 const POLLING_INTERVAL = 10000
 const NETWORK_URL = process.env.REACT_APP_NETWORK_URL
+const FORMATIC_KEY = process.env.REACT_APP_FORTMATIC_KEY
+const PORTIS_ID = process.env.REACT_APP_PORTIS_ID
+
+if (typeof NETWORK_URL === 'undefined') {
+  throw new Error(`REACT_APP_NETWORK_URL must be a defined environment variable`)
+}
 
 export const network = new NetworkConnector({
   urls: { [Number(process.env.REACT_APP_CHAIN_ID)]: NETWORK_URL },
@@ -28,13 +34,13 @@ export const walletconnect = new WalletConnectConnector({
 
 // mainnet only
 export const fortmatic = new FortmaticConnector({
-  apiKey: process.env.REACT_APP_FORTMATIC_KEY,
+  apiKey: FORMATIC_KEY ?? '',
   chainId: 1
 })
 
 // mainnet only
 export const portis = new PortisConnector({
-  dAppId: process.env.REACT_APP_PORTIS_ID,
+  dAppId: PORTIS_ID ?? '',
   networks: [1]
 })
 

src/connectors/tsconfig.json

+{
+  "extends": "../../tsconfig.strict.json",
+  "include": ["**/*"]
+}
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