Browsing Tag
solidity
10 posts
Reentrancy in 2026: Why It Still Drains Millions (and How AI Spots It)
Reentrancy is the oldest trick in smart contract exploitation. The DAO fell to it in 2016. You would…
Solidity Basics (Part 2) — Arrays, Mappings & Structs (Upgrading the Web3 Journey Logger)
Yesterday we took our first real steps into Solidity: variables, functions, and a simple Web3JourneyLogger contract that stored…
DeDe Protocol: Trustless Settlement Layer for Physical Delivery
TL;DR DeDe is a minimal, Ethereum-based protocol for physical delivery. No apps, no marketplace, no routing engine, only…
The 3 Most Subtle Solidity Bugs We Found in Audits (And How We Found Them)
(This is the first article in our three-part series on protocol security.) Introduction: Why Manual Review Will Always…
Gas Estimation Failed
Hello everyone. I am getting the “Gas estimation failed” error while trying to solve the last 3 levels…
A sleek solidity cheatsheet
part 1 of a 5 part series on essentials for solidity devs solidity_cheatsheet.sol cryptography_cheatsheet.sol assembly_cheatsheet.sol designPatterns_cheatsheet.sol security_cheatsheet.sol It…
How to Write a Token Price Oracle Smart Contract
Introduction In the rapidly evolving DeFi ecosystem, accurate and reliable token price data is fundamental for various applications…
A Missed Modifier, A Race Against Time: The Genesis of a Handy Online Smart Contract Editor
Navigating the thrilling yet challenging realm of Solidity can sometimes throw curveballs our way. One such unexpected moment…
How to Build an Answer-to-Earn Platform with React, Solidity, and CometChat
What you will be building, see the demo Sepolia Testnet and git repo. Introduction If you’re looking to…
Re-entrancy attacks in Ethereum smart contrats
A re-entrancy attack is a type of vulnerability that can occur in smart contracts that allow an attacker…
