AAntoniointonymoon.hashnode.dev·1d ago · 2 min readFreelanceFlovv Micro-Tasks Marketplace Inside World AppFor the last few weeks I've been heads-down building FreelanceFlovv, a freelance marketplace Mini App that lives entirely inside World App. No separate sign-up flow, no email/password, no "prove you'r00
SNsamineni nikhilinnikhilsamineni.hashnode.dev·2d ago · 10 min readSocial Engineering & Phishing Attack — A Hands-on Cybersecurity LabIntroduction When we talk about cybersecurity, we usually think about hackers attacking computers, servers, or networks. But there is another important target: people. An attacker does not always need00
RMRowan maththiasinrowanmaththias.hashnode.dev·Sep 3 · 2 min readInside a Crypto Exchange: What Really Happens After You Click “Buy”?A simple “Buy BTC” action triggers a carefully coordinated sequence of processes inside a crypto exchange. The request first passes through the trading gateway, where authentication, permissions, rate00
SGShriganesh Guptain0xshriganeshgupta.hashnode.dev·Aug 30 · 5 min readThe Compliance Trap: Why Developers Need to Stop Hoarding User PIIWhen you're building a project for a weekend hackathon, speed is everything. You spin up a quick database, wire up an authentication or KYC provider, and save every single field they throw back at you00
DOD Ozgur Cakirkayaindocak.hashnode.dev·Aug 24 · 22 min read🌳 Demystifying Merkle Trees: The Cryptographic Backbone of Modern Blockchains and Layer 2s1. 🔍 Introduction: What is a Merkle Tree? A Merkle tree — also called a hash tree — is a binary tree of hashes in which every leaf node is the hash of a unit of data, and every non-leaf node is the h00
RMRowan maththiasinrowanmaththias.hashnode.dev·Aug 19 · 8 min readHow Smart Contract Events Work on EVM BlockchainsA smart contract can execute a token transfer, create an order, mint an NFT, or process a deposit in seconds. But how does an application know that one of these actions actually happened? Reading the 00
TGTathagat Guptainbuilders-runtime.hashnode.dev·Jul 8 · 11 min readEthereum's Storage System: How 32 Bytes Hold an Entire WorldEthereum compresses its entire global computing state into a 32-byte hash every 12 seconds. This 32-byte hash is used to verify every account balance, every smart contract's storage, and every line of20
GPGlory Praise Emmanuelinglorypraise.hashnode.dev·Jun 29 · 9 min readOn-Chain vs Off-Chain: How to Decide What Data Lives Where in Web3One of the most consequential decisions in any Web3 system is also one of the least discussed honestly: what data lives on-chain, what lives off-chain, and how to build a system that uses both correct00
ALAutonix Labinautonix-lab.hashnode.dev·Jun 11 · 3 min readDeFi for Traditional Businesses: A Practical Guide to Getting StartedDecentralized finance has a branding problem. For most business owners and finance executives, "DeFi" still conjures images of crypto speculators chasing yield on obscure tokens. That association is u00
SSatwikinzobyt.hashnode.dev·Jun 11 · 4 min readBuilding an AI-powered blockchain claim verification platform for secure token airdrops and campaign managementToken airdrops have become one of the most effective ways for blockchain projects to bootstrap communities and reward early adopters. Unfortunately, they have also become one of the easiest systems to00
