This article describes how CMTAT implements flexible access control by separating business logic from authorization policy, allowing deployments to choose between RBAC, ownership, OpenZeppelin AccessManager, or custom policies.
2026, Jan 27 —This article is an overview of the OpenZeppelin ERC-4337 Account contract. The content is mainly based on the OpenZeppelin documentation.
2025, Dec 13 —This article summarizes the essential points to verify when reviewing a Solidity verifier contract using in zk-proof systems
2025, Nov 28 —Tornado Cash is one of Ethereum’s pioneering privacy protocols build on zk-SNARK and Circom zero-knowledge circuits.
2025, Nov 19 —This article presents the differences between abi.encode, abi.encodePacked, and abi.encodeWithSignature in Solidity. Use cases, examples, and security tips.
2025, Jul 29 —This article explores data structures in OpenZeppelin Contracts v5, including EnumerableSet, DoubleEndedQueue, CircularBuffer, Checkpoints, Heap, and MerkleTree.
2025, Jul 29 —First Fight 42 - Snowman Merkle Airdrop.
2025, Jul 11 —First Fight 41 - SSSwap is aimed to be a minimalistic AMM on Solana.
2025, Jul 11 —First Fight 38 - Rock Paper Scissors DApp is a fully decentralized implementation of the classic Rock Paper Scissors game on Ethereum.
2025, May 07 —This article presents the different standards to represent cross-chain token on Ethereum and EVM blockchain, notably ERC-7281(xERC20) & ERC-7802
2025, May 02 —This article presents a global overview of ERC-4337 which offers Account Abstraction on Ethereum using Alt Mempool and an entrypoint.
2025, May 02 —Discover how Multicall enables batch execution of smart contract calls, when to use CALL vs DELEGATECALL, and how contract interactions differ from EOAs.
2025, Apr 03 —This article presents a global overview of ERC-721 standard (NFT), covering its core functions, metadata, and security best practices and to build it with OpenZeppelin.
2025, Mar 03 —Non-Fungible Tokens (NFTs) enable unique, verifiable ownership of digital and real-world items on the blockchain. While ERC-721 remains the main standard to represent NFTs on Ethereum and EVM blockchains, several other standards (ERC-1155, ERC-2981, ERC-4907,...) have emerged to meet various use cases and improve functionality.
2025, Jan 14 —Solidity Interview Questions - Advanced, answers from the article - Solidity Interview Questions- by RareSkills.
2024, May 06 —Solidity Interview questions - Hard, answers from the article - Solidity Interview Questions- by RareSkills.
2024, Mar 04 —Solidity Interview questions - Medium, answers from the article - Solidity Interview Questions- by RareSkills.
2024, Feb 14 —This article describes the challenge NotSuchSolidIT of Insomni'hack 2023
2023, Nov 08 —This article summarizes the main and easier tricks to save gas with Solidity.
2023, Sep 26 —This articles describes a correspondence table between the smart contract languages Solidity (Ethereum) and SmartPy / Python (Tezos).
2023, Jun 02 —Summary of the most important points to think and check to program proxy contracts on Ethereum, with a focus on the OpenZeppelin library.
2022, Oct 31 —There are different way to indicate the solidity version of the compiler. This article presents the advantages and disadvantages of each
2022, Oct 29 —