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Tornado Cash Circuits - Overview

Tornado Cash is one of Ethereum’s pioneering privacy protocols build on zk-SNARK and Circom zero-knowledge circuits.

Solidity ABI Encoding – Overview

This article presents the differences between abi.encode, abi.encodePacked, and abi.encodeWithSignature in Solidity. Use cases, examples, and security tips.

OpenZeppelin v5 Data - Overview

This article explores data structures in OpenZeppelin Contracts v5, including EnumerableSet, DoubleEndedQueue, CircularBuffer, Checkpoints, Heap, and MerkleTree.

Ethereum NFT Standards: ERC-721, ERC-1155, ERC-6551, and More

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.

Solidity (Ethereum) vs SmartPy (Tezos)

This articles describes a correspondence table between the smart contract languages Solidity (Ethereum) and SmartPy / Python (Tezos).