- use truffle
truffle compile
- use remix
default version:
https://remix.ethereum.org/#optimize=true&evmVersion=null&version=soljson-v0.8.2+commit.df193b15.js&runs=200
byzantium version:
https://remix.ethereum.org/#optimize=true&evmVersion=byzantium&version=soljson-v0.8.2+commit.df193b15.js&runs=200