LeetCode Auto Submission Script

This Node.js script automates fetching solved LeetCode problems, retrieves corresponding Java code (via WalkCCC data), and submits solutions directly to LeetCode using your authenticated session.

Features

• Fetches your solved LeetCode problems using GraphQL

• Skips premium-only & DB-only questions

• Extracts Java solutions from merged_output.json

• Submits code to LeetCode automatically

• Logs skipped/unsubmitted questions

• Tracks progress in progress.json

• New: Chrome Extension to easily fetch LeetCode session and CSRF tokens

##New Project Structure

project/
├── LeetCode-Token-Viewer
    ├── manifest.json
    ├── popup.html
    ├── popup.js
├── ok.js             # Your main Node.js script
├── merged_output.json    # Contains problem info (id, walkcc_url, leetcode_url)
├── progress.json         # Tracks submitted questions
├── skipped.log           # Logs skipped/unsubmitted entries

Requirements

• Node.js Environment (Make sure Node.js is installed.)

node -v
npm -v

• Install Dependencies

npm install fs-extra

LeetCode Token Viewer Chrome Extension

This Chrome Extension helps you fetch your LeetCode session and CSRF tokens locally.

Features

• Extracts LEETCODE_SESSION and csrftoken from your browser cookies

• Displays tokens in a simple popup

• Lets you copy tokens as a single string (e.g., session:; csrf:)

• Fully local — never sends your tokens anywhere

Installation

• Open Chrome and go to chrome://extensions.

• Enable Developer mode (toggle in top-right corner).

• Click Load unpacked and select the leetcode-token-viewer folder.

• Pin the extension to the Chrome toolbar for easy access.

Usage

• Log in to LeetCode.

• Click the LeetCode Token Viewer extension icon.

• Copy the token string displayed:

Update Credentials in Script

Fill in these fields at the top of the file:

const LEETCODE_SESSION = "<your-session-cookie>";
const CSRFTOKEN = "<your-csrf-token>";

How It Works

• Constants

MAX_Q: Total number of questions to iterate (default: 3691)

TARGET_SUCCESS: Required success count (1 means first submission victory)

MAX_RANDOM_ATTEMPTS: Max retries per question

DELAY_BETWEEN_ATTEMPTS_MS: Delay between submissions

premiumQues: List of paid-only questions to skip

dbQues: List of SQL/DB-based questions to skip

Running the Script

Run the script with Node:

node ok.js