* begin refactor suggested as "step 2": https://github.com/ZcashFoundation/zebra/issues/7968#issue-2003245309
Squashed from multiple commits to enable partial rebase
* break out more little traits
* add activation implementation leveraging From<Network> for lrz::cons::
* for transfer of ownership I cannot return a type that's owned by the method
* hrp_sapling_extended_full_viewing_key
* complete implementation of interface of Parameters on Network reuse Parameters on zcash Network where possible
* move doc-comments to trait declarations (from impls)
* Simplify/complete Parameters impl for Network
* Add checkpoint_list method, move documentation, etc
* move last match network to inside network method
* add back comment
* use zcash_address for parameter types in zebra-chain
* use inherent methods instead of big parameters passthrough
* revert to implementation of From on zcash_primitives::..::Network vs &zcash_prim...
* move match
* add test to block maximum time rule
* update changelog
* finish porting target_difficutly_limit
* remove obscelete code comment
* revert non-functional change
* finish migrating target_difficulty_limit, checkpoint_list
* update changelog
---------
Co-authored-by: Hazel OHearn <gygaxis@zingolabs.org>
* Test if mandatory checkpoint is after grace period
Check that the mandatory checkpoint height is after the ZIP-212 grace
period for both mainnet and testnet, because Zebra is currently unable
to fully validate the blocks during that grace period.
* Update mandatory checkpoint height
Require it to be after the ZIP-212 grace period so that the blocks
during the grace period are validated by the checkpoints because Zebra
can't currently fully validate blocks during that period.
Arya
Za Wilcox
Conrado Gouvea
Janito Vaqueiro Ferreira Filho