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
Thane Thomson
7b162f5c54