Browsing Tag
solidity
9 posts
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…
