feat(mapping): add forget object handler

src/index.ts

@@ -1,2 +1,3 @@
 //Exports all handler functions
 export * from "./mappings/handleStoreObject";
+export * from "./mappings/handleForgetObject";

src/mappings/handleForgetObject.ts

@@ -0,0 +1,12 @@
+import type { CosmosMessage } from "@subql/types-cosmos";
+import type { MsgExecuteContract } from "cosmjs-types/cosmwasm/wasm/v1/tx";
+import { ObjectariumObject } from "../types";
+import { getObjectariumObjectId } from "../utils/utils";
+
+export const handleForgetObject = async (
+    msg: CosmosMessage<MsgExecuteContract>
+): Promise<void> => {
+    const objectId = getObjectariumObjectId(msg.tx.tx.events);
+
+    objectId && ObjectariumObject.remove(objectId);
+};