This is an example of implementation in solidity language of an ERC-20 standard Ethereum Token, mintable and burnable, with owner access permissions and pausable module.

lottery, a random contract that we make sure the winner get all the money, it's automatic and real random.

An escrow contract that mediates the transactions between untrusted parties.

Easy-to-follow tutorial for writing, compiling, deploying and testing your first smart contract with Hardhat.

Hardhat Getting Started Project

Lazy NFTs

This repo demonstrates on how to use Hardhat, EthersJs to develop, test and deploy smart contract on both local network(hardhat) and testnets.

A voting system created using solidity

DeciSound is a decentralized music app built on the Ethereum blockchain, allowing users to discover, upload, and share music in a transparent and secure manner.

This repository contains the necessary code and configuration files to deploy and verify contracts using the Zk EVM on Polygon. With the Zk EVM, users can enjoy the benefits of private transactions and reduced gas fees.

Create API with Node.js and Hardhat to use in dApp

A decentralized raffle contract that makes use of chainlink verifiable random number to generate a secured and verifiable random number that determines the winner of the raffle lottery.

It helps developers manage and automate the recurring tasks that are inherent to the process of building smart contracts and dApps, as well as easily introducing more functionality around this workflow

A production ready crowd funding smart contract.

A decentralized raffle, that allows players to participate in the raffle by paying an entrace fees. Chainlink keepers trigger the raffle after a specific interval, the winner is then credited with the contract balance.

Deploying a contract to the Göerli test network

Multisig stands for multi-signature, which is a specific type of digital signature that makes it possible for two or more users to sign documents as a group.

Hardhat

Basic decentralized exchange smart contract

Solidity Proxy Storage Layout