Understand crypto wallets, seed phrases, passkeys, and the difference between hot, cold, and smart wallets. Stay safe and in control of your digital assets.
Common Attacks in Web3: Phishing, Drainers, Fake Airdrops How the most successful crypto scams actually work, and exactly how to avoid them. TL;DR: Most losses start with social engineering (DMs, emails, pop-ups). Drainers abuse token approvals or get you to sign malicious messages. Never enter a seed phrase outside your hardware wallet. Use an approval […]
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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 »
Intro to Multi-Sig & Smart Wallets (Account Abstraction, Guardians, Paymasters) Intermediate Wallets • ~20 min read • Updated: 11/07/2025 TL;DR: Plain EOAs (Externally Owned Accounts) are one private key away from disaster. Multi-sig wallets require a threshold (e.g., 2-of-3) to move funds, removing the single-key failure mode. Smart wallets (contract accounts) go further: social recovery
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Wallet Safety 101 (2025): Seed Phrases, Hardware Wallets, Approvals & Scam Defense Beginner → Intermediate Self-Custody & Security • ~16–20 min read • Updated: 2025-11-07 TL;DR: Self-custody is powerful but unforgiving. Your crypto is secured by private keys derived from a seed phrase, lose the seed or sign something malicious and funds can move without
