Implement EraTransition #3737
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Implement EraTransition #3737
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* `EraTransition` type class can be used to deal with cumulative configuration necessary for getting to a particular era * It can also be used for testing and benchmarking to inject initial staking and funds into the initial state as well as fast forward the state into any era by translating it and upgrading PParams. This was done by migrating `registerInitialFunds` and `registerInitialStaking` functions from consensus: * Also additions to the `cardano-ledger-api`: * Add `LatestKnownEra` * Export `EraTransition` interface * Add `mkLatestTransitionConfig` that works for `LatestKnownEra`
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mostly propagating the new Ledger `TransitionConfig` concept, see IntersectMBO/cardano-ledger#3737
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Next major ledger release should be soon-ish and will likely be not too different from what is being integrated here. - Most of the diff is due to integrating the new `TransitionConfig` concept from Ledger, see IntersectMBO/cardano-ledger#3737. - Every Shelley-based era `XEra c` has a `TransitionConfig (XEra c)` that contains all Genesis information up until this era. In particular, one can get all previous `TranslationContext`s and `TransitionConfig`s up until this era from it. - They can be used to register initial funds and staking (benchmarking features whose implementation has now been moved to Ledger), and to create initial Shelley ledger states for pure Shelley-based chains. - We could keep the current interface to `protocolInfoCardano` the same (by assembling a Conway `TransitionConfig` from the given `TranslationContext`s), but Ledger wants to push the construction of the `TransitionConfig` downwards to Node etc (eg in order to be able to add more information to it, or even consolidate all Genesis files into one). This also actually makes things easier on our end, as this allows us to simplify the `ProtocolTransitionParams`. - Ledger state serialization and the Conway Genesis file format changed.
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Description
Era Transition defines all of the configuration that is needed to transition from Shelley to a current era.
EraTransitiontype class can be used to deal with cumulativeconfiguration necessary for getting to a particular era
staking and funds into the initial state as well as fast forward the
state into any era by translating it and upgrading PParams.
This was done by migrating
registerInitialFundsandregisterInitialStakingfunctions from consensus:cardano-ledger-api:LatestKnownEraEraTransitioninterfacemkLatestTransitionConfigthat works forLatestKnownEraFixes #3337
Checklist
.cabalandCHANGELOG.mdfiles according to theversioning process.
.cabalfiles for all affected packages are updated. If you change the bounds in a cabal file, that package itself must have a version increase. (See RELEASING.md)CHANGELOG.mdfor the affected packages. New section is never added with the code changes. (See RELEASING.md)fourmolu(usescripts/fourmolize.sh)scripts/cabal-format.sh)hie.yamlhas been updated (usescripts/gen-hie.sh)