EtherAuthority creates smart contracts including: DeFi, NFT, DAO, Metaverse, Gaming, DEX, Launchpad, L1 Blockchain, Escrow, Cross-chain Bridge, and many more.

CityDAO's Solidity smart contracts

Solidity contract for storing verified X.509 certificate chains in parent pointer trees on ETH blockchain

master cheatsheet for solidity developers

[crypto] A collection of the smart contracts for unreleased decentralized applications I've made, each with their own description, functionality, and truffle tests. Feel free to utilize or improve on them.

Decentralized voting system that tokenizes individual election contracts as immutable records when ended.

High level implementation of the ERC-20 tokens contract

The practice of working with Uniswap: creating a pair for two tokens and swaping.

This is a working repo of @EthereumCommonwealth audits. We performed more than 400 security audits since 2018. Not even a single contract was hacked after our auditors approved the code. Accepting audit requests here.

solidity

A DApp that deploys a local IPFS node and provides a minimal frontend for interacting with IPFS.

ポチ袋に ETH を入れて、お年玉を送ろう

This blockchain node network protocol is built on Solidity, leveraging advanced AI-driven algorithms to enhance the robustness, security, and scalability of decentralized networks. Our protocol is designed to support next-generation decentralized applications (dApps) and smart contracts, providing a foundation for building secure, efficient, future

Foundry Template is a starter project for Ethereum development using Foundry. It includes key tools like Forge, Cast, Anvil, and Chisel, along with utilities for code quality (pre-commit), spell checking (typos), and changelog generation (git-cliff).

Simplest example of a hardhat project, useful for getting started

Fungible ERC-20 token implemented on Ethereum with blacklist feature

Overflow vulnerability in Solidity ( v0.6.12 )

Web3 Platform that rewards you ETH for Smiling

create a Solidity smart contract that accepts two user addresses to automate the creation of joint saving accounts.