Discover how smart contracts work, the most common token standards, and real-world use cases that power decentralized application
Soulbound Tokens (SBTs) (Complete Guide) Soulbound tokens are non-transferable NFTs that stay attached to a wallet, turning a token into a durable on-chain signal. They can represent course completion, memberships, contributor roles, and eligibility gates that apps can read without a centralized API. This guide explains what SBTs are, where they fit compared to NFTs […]
Soulbound Tokens (SBTs) Explained Read More »
ENS and Web3 Domain Names: Human Readable Addresses That Travel With You ENS name resolution turns copy paste crypto into a readable identity layer. Instead of sending funds to a long hex string, you can send to a name like you.eth, while also publishing the addresses, profile records, and content pointers that apps can resolve
ENS and Web3 Domain Names Read More »
Auditing & Testing: From Unit Tests to Fuzzing & Invariants Ship with confidence: rigorous tests, automated checks, and structured reviews before mainnet. TL;DR: Use Foundry or Hardhat for unit/integration tests, add fuzzing/invariant tests, run static analysis (Slither), measure coverage, and follow an audit checklist with clear threat models. In this lesson Tooling Stack Foundry Example
Auditing and Testing (Foundry/Hardhat, fuzzing, static analysis) Read More »
Smart Contract Risks: Re-entrancy, Oracles, Access Control & More Recognize top vulnerability classes and the standard defenses used in production. TL;DR: Most exploits are preventable. Use CEI, ReentrancyGuard, strict access control, safe math by default (>=0.8), and robust oracle design. Test, fuzz, and audit before mainnet. In this lesson Re-entrancy Oracle Manipulation Access Control Math/Overflow
Smart Contract Risks Re entrancy, oracle-manipulation Read More »
Real-World DApps: Patterns, Flows & Integration From token swaps to crowdfunding: on-chain contracts + front-end + wallet + indexers. TL;DR: A DApp = Smart contract + Front-end + Wallet + RPC/Indexers. Learn common flows you can implement and test end-to-end. In this lesson DApp Architecture DEX Swap (Uniswap-style) NFT Mint Crowdfunding (escrowed) Multisig & Wallet
Real-World DApps Examples Read More »
Solidity From Zero: Learn by Building (State, Functions, Events, Security, and a Capstone) A friendly, thorough guide for absolute beginners. We start at “what is a smart contract?” and walk you to intermediate skills: writing, testing, and shipping small but real contracts safely. Heads-up: Educational content, not financial or security advice. Use test networks while
Anatomy of an Ethereum Transaction Intermediate Smart Contracts • ~12 min read • Updated: 08/08/2025 TL;DR: A transaction is a signed message that changes state. Core fields: nonce, gas limit, max fee/priority fee (EIP-1559), to, value, calldata, and signature (v,r,s). The base fee is burned; your tip (priority fee) goes to the block builder/validator. Receipts
Anatomy of an Ethereum Transaction Read More »
