Description of change

Adapt the current code to use 18 decimals for SMR native on L2

Links to any relevant issues

Bug fix (a non-breaking change which fixes an issue)
Enhancement (a non-breaking change which adds functionality)
Breaking change (fix or feature that would cause existing functionality to not work as expected)
Documentation Fix

[ ] I have followed the contribution guidelines for this project
[ ] I have performed a self-review of my own code
[ ] I have commented my code, particularly in hard-to-understand areas
[ ] I have made corresponding changes to the documentation
[ ] I have added tests that prove my fix is effective or that my feature works
[ ] I have checked that new and existing unit tests pass locally with my changes
[ ] I have updated the CHANGELOG.md, if my changes are significant enough