I created Simple Crowdsale, and used import “https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.5.1/contracts/crowdsale/Crowdsale.sol”;
tried using ABI constructor args, but looks that I doing something wrong or missing
how to verify it on eth/bscscan?
Please refer to this guide.
If you are using HardHat, use the package at https://www.npmjs.com/package/@nomiclabs/hardhat-etherscan
No time for that, used just Remix, and as I read now should use FLATTENER, right?