task7

mover/sahab328/code/task7/get_flag.ts

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+import { getFullnodeUrl, SuiClient } from "@mysten/sui/client";
+import { bcs, toHex } from '@mysten/bcs';
+import { createHash } from "crypto";
+
+
+async function get_flag(github_id: string) {
+    const flag_str_id = "0xc8dcd54baa7724177593a9f70598a09ae6a4286f996542e058f248209db08147";
+    const client = new SuiClient({ url: getFullnodeUrl("testnet") });
+
+    const flag_str_obj = await client.getObject({ 
+        id: flag_str_id, 
+        options: {
+            showBcs: true,
+            showContent: true,
+        } 
+    });
+    const content = flag_str_obj.data!.content as any;
+    const flag_str = content.fields["str"] as string;
+    const flag_str_bcs_bytes = bcs.string().serialize(flag_str).toBytes();
+    const github_id_bytes = new TextEncoder().encode(github_id);
+    const buffer = Buffer.concat([flag_str_bcs_bytes, github_id_bytes]);
+    const flag = createHash('sha3-256').update(buffer).digest();
+    console.log(toHex(new Uint8Array(flag))); 
+}

mover/sahab328/code/task7/package.json

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+{
+  "name": "task7",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@mysten/sui": "^1.16.0"
+  }
+}