Update ethereum-gravatar.md

docs/quickstart/quickstart_chains/ethereum-gravatar.md

@@ -134,11 +134,15 @@ import {
   UpdatedGravatarLog,
 } from "../types/abi-interfaces/Gravity";
 import { Gravatar } from "../types";
+import assert from "assert";
 
 export async function handleNewGravatar(log: NewGravatarLog): Promise<void> {
   logger.info("New Gravar at block " + log.blockNumber.toString());
+
+  assert(log.args, "Require args on the logs");
+
   const gravatar = Gravatar.create({
-    id: log.args.id.toHexString(),
+    id: log.args.id.toHexString()!,
     owner: log.args.owner,
     displayName: log.args.displayName,
     imageUrl: log.args.imageUrl,
@@ -152,20 +156,29 @@ export async function handleUpdatedGravatar(
   log: UpdatedGravatarLog
 ): Promise<void> {
   logger.info("Updated Gravar at block " + log.blockNumber.toString());
-  const id = log.args.id.toHexString();
+
+  assert(log.args, "Require args on the logs");
+
+  const id: string = log.args.id.toHexString()!;
 
   // We first check if the Gravatar already exists, if not we create it
   let gravatar = await Gravatar.get(id);
   if (gravatar == null || gravatar == undefined) {
-    gravatar = new Gravatar(id);
-    gravatar.createdBlock = BigInt(log.blockNumber);
+    gravatar = Gravatar.create({
+      id,
+      createdBlock: BigInt(log.blockNumber),
+      owner: "",
+      displayName: "",
+      imageUrl: "",
+    });
   }
   // Update with new data
   gravatar.owner = log.args.owner;
   gravatar.displayName = log.args.displayName;
   gravatar.imageUrl = log.args.imageUrl;
   await gravatar.save();
 }
+
 ```
 
 Let’s understand how the above code works.