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

[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.

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.

High level implementation of the ERC-20 tokens contract

solidity

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

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

Fungible ERC-20 token implemented on Ethereum with blacklist feature

Overflow vulnerability in Solidity ( v0.6.12 )

Simplest example of a hardhat project, useful for getting started

Zero Sized Contract Attack

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

A smart contract implemented on Ethereum that allows a buyer to deposit ERC20 tokens, which a seller can withdraw after a 3-day timelock.

Sample contracts written while learning solidity basics.

Voting Smart Contract using Solidity

Solidity smart contract for a dice game on the Polygon network