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ERCs
Learn how ERC-4626 tokenized vaults work — from assets and shares to deposits, preview functions, yield mechanics, inflation attacks and fees. Discover the standard that quietly powers DeFi.
Web3 Security
Your tests are lying To You — How mutation testing using slither-mutate exposed ways my “simple, well-tested” Solidity vault failed to detect incorrect behaviour — and what I did about it
Solidity
Hard-level Solidity interview solutions part 2 — reentrancy, integer overflow edge cases, signature malleability, and advanced security patterns.
Web3 Security
Step-by-step walkthrough and solution to Ethernaut's UniqueNFT challenge (#38) — identifying the vulnerability, crafting the exploit, and understanding the fix.
Solidity
Hard-level Solidity interview solutions part 1 — storage layout edge cases, delegatecall semantics, proxy patterns, and low-level EVM behaviour.
Solidity
Medium-level Solidity interview solutions — EVM internals, gas optimisation, assembly usage, and common audit patterns explained with worked examples.
Solidity
Solutions and explanations for RareSkills' easy-level Solidity interview questions — memory vs calldata, visibility, basic storage patterns, and contract semantics.
Solana
Structuring Solana projects, testing strategies, and handling the most common pitfalls — account space errors, PDA mismatches, deployment issues, and CPI failures.
Solana
Deep dive into advanced PDA and CPI patterns with hands-on Anchor examples — an on-chain game storage program and hashed PDA seeds.
Solana
Solana program model and account types, the Anchor framework, PDAs and CPIs with Anchor implementation, and error handling patterns.
Solana
Intro to Solana's core architecture — Gulf Stream, SWQoS, transaction processing, Proof of History, Sealevel, Turbine, account-based storage, and a look at the upcoming Alpenglow runtime.
DeFi / NFT
How Dutch auction mechanisms work for token and NFT launches — price discovery, fairness properties, and why GDA/CGDA have been widely adopted in blockchain.
NFT Standards
Solidity smart contract implementation of ERC-4907 — expiry logic, user-role separation, and end-to-end testing using Brownie.
NFT Standards
What is NFT rental, why it matters, and what ERC-4907 adds — the standard's motivation, interface design, and how it differs from plain ERC-721 ownership.
NFT Internals
When you mint an NFT on OpenSea, you get a huge number as the token ID. This blog dissects the bit-packing scheme — creator address encoding and what the blob actually means.