fix ethereum-waffle dependency

src/elf/providers/providers.ts

@@ -1,6 +1,6 @@
 import { createAlchemyWeb3 } from "@alch/alchemy-web3";
 import { ExternalProvider, Provider } from "@ethersproject/providers";
-import { MockProvider } from "ethereum-waffle";
+import type { MockProvider } from "ethereum-waffle";
 import { providers } from "ethers";
 
 import { addressesJson } from "src/elf-council-addresses";
@@ -15,7 +15,15 @@ const { chainId } = addressesJson;
 export const ALCHEMY_GOERLI_HTTP_URL = `https://eth-goerli.alchemyapi.io/v2/${ALCHEMY_GOERLI_KEY}`;
 export const ALCHEMY_MAINNET_HTTP_URL = `https://eth-mainnet.alchemyapi.io/v2/${ALCHEMY_MAINNET_KEY}`;
 
-export const testProvider = new MockProvider();
+// vercel won't build with ethereum-waffle as a production dependency.  only import it if we are testing.
+let mockProvider: MockProvider | undefined;
+if (process.env.NODE_ENV === "test") {
+  // eslint-disable-next-line @typescript-eslint/no-var-requires
+  const { MockProvider } = require("ethereum-waffle");
+  mockProvider = new MockProvider();
+}
+// safe to cast since this should only ever be used in 'test' environment anyway.
+export const testProvider = mockProvider as MockProvider;
 
 const provider = getProvider();
 export const defaultProvider = provider;

tsconfig.json

@@ -1,7 +1,11 @@
 {
   "compilerOptions": {
     "target": "es5",
-    "lib": ["dom", "dom.iterable", "esnext"],
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ],
     "allowJs": true,
     "skipLibCheck": true,
     "esModuleInterop": true,
@@ -13,11 +17,16 @@
     "resolveJsonModule": true,
     "isolatedModules": true,
     "noEmit": true,
-    "jsx": "react",
+    "jsx": "preserve",
     "rootDir": ".",
     "baseUrl": ".",
     "incremental": true
   },
-  "include": ["pages", "src"],
-  "exclude": ["node_modules"]
+  "include": [
+    "pages",
+    "src"
+  ],
+  "exclude": [
+    "node_modules"
+  ]
 }