eth_call and invoking event handler in WASM (#25)

* Perform eth_call and get result in js import

* Use dummy value for eth_call

* Called handler in wasm with event param

* Implement passing event to subgraph handler function

* Use generated event class Test for passing to handler

* Pass event params to handler

Co-authored-by: nabarun <nabarun@deepstacksoft.com>

packages/graph-node/tsconfig.json

@@ -33,7 +33,7 @@
     // "typeRoots": [],                                  /* Specify multiple folders that act like `./node_modules/@types`. */
     // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
     // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
-    // "resolveJsonModule": true,                        /* Enable importing .json files */
+    "resolveJsonModule": true,                        /* Enable importing .json files */
     // "noResolve": true,                                /* Disallow `import`s, `require`s or `<reference>`s from expanding the number of files TypeScript should add to a project. */
 
     /* JavaScript Support */
@@ -97,5 +97,6 @@
     // "skipDefaultLibCheck": true,                      /* Skip type checking .d.ts files that are included with TypeScript. */
     "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */
   },
+  "include": ["src"],
   "exclude": ["assembly", "dist"]
 }