The node.NewNode method is pretty complex at the moment, an in order to address issues like #3156, we need to simplify the interface for partial node instantiation. In some places, we don't need to build up a full node (like in the node.TestCreateProposalBlock test), but the complexity of such partial instantiation needs to be reduced.
This PR aims to eventually make this easier/simpler.
See also this gist https://gist.github.com/thanethomson/56e1640d057a26186e38ad678a1d114c for some background work done when starting to refactor here.
## Commits:
* [WIP] Refactor node.NewNode to simplify
The `node.NewNode` method is pretty complex at the moment, an in order
to address issues like #3156, we need to simplify the interface for
partial node instantiation. In some places, we don't need to build up a
full node (like in the `node.TestCreateProposalBlock` test), but the
complexity of such partial instantiation needs to be reduced.
This PR aims to eventually make this easier/simpler.
* Refactor state loading and genesis doc provider into state package
* Refactor for clarity of return parameters
* Fix incorrect capitalization of error messages
* Simplify extracted functions' names
* Document optionally-prefixed functions
* Refactor optionallyFastSync for clarity of separation of concerns
* Restructure function for early return
* Restructure function for early return
* Remove dependence on deprecated panic functions
* refactor code a bit more
plus, expose PEXReactor on node
* align logger names
* add a changelog entry
* align logger names 2
* add a note about PEXReactor returning nil
What happened:
New code was supposed to fall back to last height changed when/if it
failed to find validators at checkpoint height (to make release
non-breaking).
But because we did not check if validator set is empty, the fall back
logic was never executed => resulting in LoadValidators returning an
empty validator set for cases where `lastStoredHeight` is checkpoint
height (i.e. almost all heights if the application does not change
validator set often).
How it was found:
one of our users - @sunboshan reported a bug here
https://github.com/tendermint/tendermint/pull/3537#issuecomment-482711833
* use last height changed in validator set is empty
* add a changelog entry
* rpc: store validator info periodly
* increase ValidatorSetStoreInterval
also
- unexpose it
- add a comment
- refactor code
- add a benchmark, which shows that 100000 results in ~ 100ms to get 100
validators
* make the change non-breaking
* expand comment
* rename valSetStoreInterval to valSetCheckpointInterval
* change the panic msg
* add a test and changelog entry
* update changelog entry
* update changelog entry
* add a link to PR
* fix test
* Update CHANGELOG_PENDING.md
Co-Authored-By: melekes <anton.kalyaev@gmail.com>
* update comment
* use MaxInt64 func
