Context

This MR fixes #2926 (closed). It is based on an overapproximation model described in https://hackmd.io/Px4aVws3QNu7EBdrVFUITA?view.

Manually testing the MR

We do not have ways to test gas models for now. So, we need to manually check that the implementation matches the model we have specified.

Document the interface of any function added or modified (see the coding guidelines)
Document any change to the user interface, including configuration parameters (see node configuration)
Provide automatic testing (see the testing guide).
For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
Select suitable reviewers using the Reviewers field below.
Select as Assignee the next person who should take action on that MR

Edited Dec 01, 2022 by Yann Regis-Gianas