#openzeppelin

Lead S&P Global disclosed on September 17, 2026 that it has entered into an agreement...

Security expert warns entire decentralized finance sector faces systemic safety risks as auditing practices prove inadequate against sophisticated attacks.

Introduction I'm constantly researching ways to improve the code for the Equillar...

Building a Decentralized NFT Marketplace with Solidity In this blog, we'll walk through...

Today, I am gonna teach you how to deploy an upgradeable ERC20 token to Polygon Mumbai with Foundry...

First chapter to build a payments gateway using smart contracts

• introduce • About testing • Setting up a testing environment • Writing unit tests • Performing...

• Setting up a Local Blockchain • Deploying a Smart Contract • Interacting from the Console •...

• Setting up a Project • First contract • Compiling Solidity • Adding more contracts • Using...

Play the level // SPDX-License-Identifier: MIT pragma solidity <0.7.0; import...

Play the level // SPDX-License-Identifier: MIT pragma solidity ^0.6.0; contract GatekeeperTwo { ...

Play the level Welcome! It is going to be a long but immensely educational road. This level prepares...