♻️ Remove `dotenv` and Use Hardhat Configuration Variables

[pcaversaccio]

🕓 Changelog

Hardhat v2.19.0 introduced configuration variables for user-specific values or for data that shouldn't be included in the code repository (i.e. a private key). Since we want to set an industry precedent, I completely remove any dotenv variables (I keep it in the .gitignore though for footgun protection) and use the new syntax vars.has and vars.get. I deliberately don't use a default value for vars.get but instead use vars.has("OPTIONAL_VARIABLE") ? [vars.get("OPTIONAL_VARIABLE")] : []; in order to be explicit about it already in the code.

🐶 Cute Animal Picture

[github-actions[bot]]

Coverage after merging hh-vars into main will be

100.00%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src
CreateX.sol	100%	100%	100%	100%