![Search icon](https://hackernoon.imgix.net/search-new.png?w=19&h=19)
The beautiful humans of HackerNoon have collectively read @vasa's 48 stories for 3 years 10 months 10 days 20 hours and 54 minutes.
ethereum
smart-contracts
solidity
upgradable-smart-contract
openzeppelin
smart-contract-versioning
blockchain
upgradable-smart-contracts