Browse all Solidity articles.
Delegatecall: The Detailed and Animated Guide This article explains how delegatecall works in detail. The Ethereum Virtual Machine (EVM) offers four opcodes for making calls between contracts: * and...
Last updated on Oct 20, 202546 min read
Smart Contract Security !smart contract security This article serves as a mini course on smart contract security and provides an extensive list of the issues and vulnerabilities that tend to recur in...
Last updated on Oct 29, 2025The RareSkills Book of Solidity Gas Optimization: 80+ Tips !solidity gas optimization TABLE OF CONTENTS The RareSkills Book of Gas Optimization Gas optimization tricks do not always work Beware of...
Last updated on Oct 22, 2025Three ways to detect if an address is a smart contract This article describes three methods in Solidity for determining if an address is a smart contract: Check if . This is not a recommended method,...
Last updated on Oct 29, 2025Understanding the Function Selector in Solidity The function selector is a 4-byte id that Solidity uses to identify functions under the hood. The function selector is how a Solidity contract knows...
Last updated on Oct 22, 2025Low Level Call vs High Level Call in Solidity A contract in Solidity can call other contracts via two methods: through the contract interface, which is considered a high-level call, or by using the...
Last updated on Oct 22, 20255 min read
Solidity Signed Integer Solidity signed integers enable using negative numbers in a smart contract. This article documents how they are used at the EVM level. Basic familiarity with the EVM and...
Last updated on Oct 29, 2025A comprehensive guide to the ERC 721 standard and related security issues ERC721 (or ERC-721) is the most widely used Ethereum standard for nonfungible tokens. It associates a unique number with an...
Last updated on Oct 22, 20253 min read
Solidity Staticcall EIP 214 Staticcall is like a regular Ethereum call except that it reverts if a state change happens. It cannot be used to transfer Ether. Both the EVM opcode, the Yul assembly...
Last updated on Oct 29, 20255 min read
Understanding smart contract metadata When Solidity generates the bytecode for the smart contract to be deployed, it appends metadata about the compilation at the end of the bytecode. We will examine...
Last updated on Oct 29, 2025Ten beginner project ideas after you learn Solidity Now that you've completed our solidity tutorial, what's next? You now have enough knowledge to build any of the following projects. Knowledge comes...
Last updated on Sep 29, 2025Require, Revert, and Custom Errors in Solana !Hero Image showing Error code and Macro In Ethereum, we often see a require statement restricting the values a function argument can have. Consider the...
Last updated on Aug 15, 2024