The TechBeat: Exploiting EIP-7702 Delegation in the Ethernaut Cashback Challenge — A Step-by-Step Writeup (12/11/2025)

How are you, hacker? 🪐Want to know what's trending right now?: The Techbeat by HackerNoon has got you covered with fresh content from our trending stories of the day! Set email preference here. ## Code Review Anti-Patterns: How to Stop Nitpicking Syntax and Start Improving Architecture By @nikitakothari [ 5 Min read ] Code reviews are pricey. Let machines catch style issues so humans can focus on what matters: security, scalability, and architecture. Read More.

Exploiting EIP-7702 Delegation in the Ethernaut Cashback Challenge — A Step-by-Step Writeup

By @hacker39947670 [ 18 Min read ] How to exploit EIP-7702 delegation flaws: A deep dive into the Ethernaut Cashback challenge with bytecode hacks and storage attacks Read More.

Measuring Non-Linear User Journeys: Rethinking Funnels Metrics in A/B Testing

By @indrivetech [ 7 Min read ] A deep dive into user reorders, hidden behavioral patterns, and how aggregated funnels improve A/B test accuracy in non-linear user journeys Read More.

The HackerNoon Newsletter: Brands, Find the Right HackerNoon Services for You (11/12/2025)

By @noonification [ 2 Min read ] 11/12/2025: Top 5 stories on the HackerNoon homepage! Read More.

Agentic UX Over "Chat": How to Design Multi-Agent Systems People Actually Trust

By @designchurchill [ 9 Min read ] Principles for designing agentic UX: verification, transparency, handoffs, and moving beyond chat interfaces. Read More.

When The Oldest Programming Language Outsmarts The Newest AI

By @josecrespophd [ 8 Min read ] C++ was not supposed to come back. Read More.

Cantor8: Building The Future of Canton Network

By @cantor8 [ 4 Min read ] Cantor8 is at the forefront of the surging growth of the Canton Network ecosystem. Endorsed by The Canton Foundation itself, the company is founded by a Cambrid Read More.

So You Want to Build a Writing Career?

By @editingprotocol [ 4 Min read ] This comprehensive guide covers everything from finding your voice to mastering SEO. Learn how to turn your writing into a career asset with HackerNoon. Read More.

How To Get a First Name Domain for Less Than $101

By @cv-domain [ 3 Min read ] Missed out on FirstName.com? .cv domain could be your last real chance to own your name online. Secure it now. Read More.

Earth Cleaning Technologies: The Current R&D Status and Why We're Still Losing the Race

By @chris127 [ 7 Min read ] Imagine if you could reverse decades of pollution. Remove tons of CO₂, Clean oceans, restore forests at scale. The good news? We can! The bad news? We don’t! Read More.

Why Gemini 3.0 is a Great Builder But Still Needs a Human in the Loop

By @knightbat2040 [ 4 Min read ] Here is the post-mortem on what worked, what failed, and the critical difference between generating code and refactoring systems. Read More.

Hard Problems Are Easier, Once You Think Like This

By @praisejamesx [ 7 Min read ] Stop being overwhelmed. Learn the neuroscience of mastery: how all genius works by compressing complexity into simple, automatic structures. Read More.

How I Found Sim Racing at Age 60

By @wicked-racing [ 5 Min read ] How a 60-year-old former wannabe rally driver has found new youth through sim racing and the new available technology. Read More.

The Invisible Line Item: Why Pollution Is Missing From Every Balance Sheet

By @chris127 [ 12 Min read ] For centuries, pollution has been the missing line item of our accounting. First from ignorance. Then from choice. Now, from necessity. We must account for it! Read More.

Everyone's Using the Wrong Algebra in AI

By @josecrespophd [ 9 Min read ] From Tesla phantom braking to LLM hallucinations, the root bug is first-order math. We explain how dual/jet numbers unlock scalable second-order AI. Read More.

I Spent 30 Days “Vibe Coding” an MVP — Burned $127, Broke Everything, and Still Found Product-Market

By @renjitphilip [ 15 Min read ] I have recently been diving into the world of vibe coding and I thought of cataloging my experience for the benefit of others. Read More.

No Need to Mock All the Time: A Better Way to Test API Resilience in Your Terminal

By @aragossa [ 2 Min read ] Writing a full mock server just to test a simple retry logic in a script is often overkill. In this tutorial, I'll show you a faster way. Read More.

Turing Test Tech Evals: Introducing the Internet's Most Comprehensive Directory of Turing Tests

By @techannouncements [ 4 Min read ] HackerNoon launches Turing Test Tech Evals, a curated directory of AI evaluation tests and Turing tests. Discover how we measure machine intelligence in 2025. Read More.

Not a Lucid Web3 Dream Anymore: x402, ERC-8004, A2A, and The Next Wave of AI Commerce

By @mickeymaler [ 30 Min read ] Explains how x402, ERC-8004, and agent discovery turn APIs and AI agents into usage-based micro businesses. Web3's future is in Agents doing the work for you. Read More.

AI Helps Developers Ship More Code—Not Always Better Code

By @ainativedev [ 6 Min read ] A new report from developer analytics firm DX reveals that while AI coding tools may enhance productivity for developers, quality concerns remain. Read More. 🧑‍💻 What happened in your world this week? It's been said that writing can help consolidate technical knowledge, establish credibility, and contribute to emerging community standards. Feeling stuck? We got you covered ⬇️⬇️⬇️ ANSWER THESE GREATEST INTERVIEW QUESTIONS OF ALL TIME We hope you enjoy this worth of free reading material. Feel free to forward this email to a nerdy friend who'll love you for it. See you on Planet Internet! With love, The HackerNoon Team ✌️