On-chain Safety Education
Onchain Diary is an independent Web3 safety education site: 115 deep-dive articles, a 232-term glossary, and the complete BIP-39 wordlist — covering crypto scams, smart contract security, and on-chain analysis. No jargon. No sign-up. No tools to install. Just the knowledge you need to stop getting rekt.
Guides, tutorials, and deep dives.
An authorized Ledger reseller was secretly acquired, its devices implanted, and an estimated $72M–$90M drained from buyers. The full timeline of a textbook supply-chain takeover.
How fake crypto job offers work: the Bybit/Safe breach, malicious coding tests, and the red flags every Web3 job seeker should know.
We independently traced the 10 flagged theft addresses in the October 9 Ledger wallet-draining reports. Verifiable losses: ~$27M — and Ledger's own response now points to a tampered-device supply chain, not a firmware breach.
Igloo Inc., the parent of Pudgy Penguins, is shutting down its Abstract L2 on December 15, 2026. Funds not bridged out by then become inaccessible. Official exit routes, the fake-migration scam wave, and how this differs from Blast.
The task scam pays you first — that is the product. How the like-and-earn funnel documented by the FBI escalates into frozen withdrawals, and how the 'merchant account' job quietly turns your wallet into a laundering pipe for other victims' money.
The FBI-documented scam where 'exchange employees' call you about an account problem. How the fake-admin funnel works, the three ways it ends — phishing, a malicious signature, or remote access — and the one rule that filters all of it.
Reading is half. The other half is recall.
Every question is drawn strictly from the Yellow Paper's own text. No outside knowledge required — if you've read it, you can pass it.
Take the quiz → T-02Sixteen scenario questions sort you into one of sixteen security personas — hunter or prey — with a safety index and a shareable result card.
Find your type →A few terms to get you going — the full glossary has 232+.
Whether you're new to crypto or deep into DeFi, understanding how scams work is the best defense. Every guide here is free.
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