Update to use latest toolchain

Thanks to @elsehow for testing (incl. adding tests)!

.eslintrc.js

@@ -0,0 +1,45 @@
+module.exports = {
+    env: {
+        browser: true,
+        es6: true,
+        node: true,
+    },
+    parser: '@typescript-eslint/parser',
+    plugins: ['@typescript-eslint'],
+    extends: [
+        'eslint:recommended',
+        'plugin:@typescript-eslint/eslint-recommended',
+        'plugin:@typescript-eslint/recommended',
+        'prettier',
+        'prettier/@typescript-eslint',
+    ],
+    rules: {
+        // allow interop with js
+        '@typescript-eslint/no-explicit-any': 'off',
+        '@typescript-eslint/ban-ts-ignore': 'warn',
+
+        // allow types to be declared anywhere in module
+        '@typescript-eslint/no-use-before-define': 'off',
+
+        // allow implicit void return
+        '@typescript-eslint/explicit-function-return-type': 'off',
+
+        // allow unwrapping
+        '@typescript-eslint/no-non-null-assertion': 'off',
+
+        // Disallow `throw "string"`, require `throw new Error(...)`.
+        'no-throw-literal': 'error',
+
+        // Enforce use of === instead of ==
+        eqeqeq: ['error', 'smart'],
+
+        // unused vars is just asking for bugs
+        '@typescript-eslint/no-unused-vars': [
+            'error',
+            {
+                varsIgnorePattern: '_.*',
+                argsIgnorePattern: '_.*',
+            },
+        ],
+    },
+};

.github/workflows/main.yml

@@ -4,19 +4,26 @@ on: [push]
 
 jobs:
   build-test:
-    runs-on: ubuntu-18.04
-
+    runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
+
       - uses: actions/setup-node@v1
         with:
           node-version: 12.x
-      - name: Install Oasis
-        run: curl --proto '=https' --tlsv1.2 -sSL https://get.oasis.dev | python - --speedrun
-      - name: Build and test service
+
+      - name: Install Oasis SDK
+        run: |
+          curl --proto '=https' --tlsv1.2 -sSL https://get.oasis.dev | python - --speedrun
+          echo "::set-env name=PATH::$HOME/.local/bin::$HOME/.cargo/bin:$PATH"
+
+      - name: Lint
+        run: |
+          cargo fmt -- --check
+          yarn
+          yarn lint
+
+      - name: Test
         run: |
-          export PATH=~/.local/bin:-~/.cargo/bin:$PATH
-          export LD_LIBRARY_PATH=$(rustc --print sysroot)/lib:$LD_LIBRARY_PATH
-          oasis build
           oasis chain >& oasis.log &
           oasis test

.gitignore

@@ -2,3 +2,4 @@
 dist/
 node_modules/
 target/
+.oasis/