Proposed changes

Pick below PRs for EIP-1559:

Types of changes

What types of changes does your code introduce to XDC network? Put an ✅ in the boxes that apply

[X] Bugfix (non-breaking change which fixes an issue)
[X] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
[ ] Documentation Update (if none of the other choices apply)
[ ] Regular KTLO or any of the maintaince work. e.g code style
[ ] CICD Improvement

Which part of the codebase this PR will touch base on,

Put an ✅ in the boxes that apply

Put an ✅ in the boxes once you have confirmed below actions (or provide reasons on not doing so) that

[X] This PR has sufficient test coverage (unit/integration test) OR I have provided reason in the PR description for not having test coverage
[ ] Provide an end-to-end test plan in the PR description on how to manually test it on the devnet/testnet.
[ ] Tested the backwards compatibility.
[ ] Tested with XDC nodes running this version co-exist with those running the previous version.
[ ] Relevant documentation has been updated as part of this PR
[ ] N/A
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