All comments in source files should be in English.
Use tabs for indentation instead of spaces.
All changes made to PriceFeed.info should be discussed on GitHub's Issues.
If you want to work on an issue, create a new branch and create a pull request and link it to an issue by, e.g.,
Resolves #1234.
The title of a pull request should start with "[WIP]" indicating you are working on it.
If you finish coding, remove the "[WIP]" prefix and mention to the maintainers for code reviews.
Maintainers will merge the PR if it is acceptable.
DO NOT push your changes to the main branch directly.