https://www.ryzhak.com/categories/web3.js/Recent content in Web3.js on DeFi + TradFi = ♡Hugoen-USSat, 06 Jan 2018 23:01:48 +0000https://www.ryzhak.com/practical-guide-to-ethereum-part-17/Sat, 06 Jan 2018 23:01:48 +0000http://www.ryzhak.com/?p=415In this tutorial we are going to write a smart contact in Solidity language that can prove file ownership.