* l2geth: updated calculate rollup fee

* l2geth: implement the gasprice serialization

* lint: fix

* rollup-test: fix

* l2geth: gaslimit encoding state polling (#927)

* l2geth: rollup gas price oracle state polling

* l2geth: read l2 gasprice from the tip

* l2geth: add config options for L2 gas price

* l2geth: comment to remove code in future

* l2geth: handle 0 and 1 fees

* l2geth: enable 0 and 1 fee tests

* feat: gaslimit encoding end to end (#932)

* core-utils: add fees package

* integration-tests: refactor for new fees

* l2geth: end to end fee spec

* l2geth: use new env var

* deps: regenerate

* lint: fix

* l2geth: fee verification

* tests: update gas prices

* tests: update gas prices

* tests: cleanup

* l2geth: small cleanup

* l2geth: fix max

* feat: fix fee calculations with bigints

* tests: fix

* tests: lint

* core-utils: rename fees to L2GasLimit

* l2geth: fix comment

* l2geth: fix name of env var

* l2geth: delete extra print statement

* l2geth: fix logline

* tests: fix typo

* l2geth: improve readability

* chore: add changeset

* l2geth: fix compiler error

* feat: clean up and fix fees

* lint: fix

* core-utils: refactor api to be more friendly

* lint: fix

* comments: fix

* refactor: clean up style and common language
Co-authored-by: Georgios Konstantopoulos <me@gakonst.com>