Fixes https://github.com/paritytech/polkadot-sdk/issues/106
Port of cumulus PR https://github.com/paritytech/cumulus/pull/2960
This PR adds the ability to bid for collator slots even after the max
number of collators have already registered. This eliminates the first
come, first served mechanism that was in place before.
Key changes:
- added `update_bond` extrinsic to allow registered candidates to adjust
their bonds in order to dynamically control their bids
- added `take_candidate_slot` extrinsic to try to replace an already
existing candidate by bidding more than them
- candidates are now kept in a sorted list in the pallet storage, where
the top `DesiredCandidates` out of `MaxCandidates` candidates in the
list will be selected by the session pallet as collators
- if the candidacy bond is increased through a `set_candidacy_bond`
call, candidates which don't meet the new bond requirements are kicked
# Checklist
- [ ] My PR includes a detailed description as outlined in the
"Description" section above
- [ ] My PR follows the [labeling
requirements](https://github.com/paritytech/polkadot-sdk/blob/master/docs/CONTRIBUTING.md#process)
of this project (at minimum one label for `T` required)
- [ ] I have made corresponding changes to the documentation (if
applicable)
- [ ] I have added tests that prove my fix is effective or that my
feature works (if applicable)
- [ ] If this PR alters any external APIs or interfaces used by
Polkadot, the corresponding Polkadot PR is ready as well as the
corresponding Cumulus PR (optional)
---------
Signed-off-by: georgepisaltu <george.pisaltu@parity.io>
* remove candidate when to invulnerable
* fix
* candidates to collators
* make parameters consistent and more reasonable
* add call to kick invulnerable candidates
* factor removal into weight
* fix: use accrue instead of add
* make set_invulnerables non-atomic
* benchmark add_invulnerable to account for candidate removal
* don't remove from candidates with set_invulnerables
* fix bounds on benchmarking
* protect against zero min invulnerables underflow
* extra event and tests
* make candidates/invulnerables self-cleaning on session change
* add integrity test
* unused imports
* make rococo-contracts have 1 collator
* Added check to ensure invulnerables have associated validator keys before they are set
* Added check to ensure invulnerables have associated validator keys before they are set
* Update pallets/collator-selection/src/lib.rs
Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>
* Added test for associated validators when setting invulnerables
* FMT
Co-authored-by: Omadoye Abraham <abraham.o@turing.com>
Co-authored-by: Ricardo Rius <9488369+riusricardo@users.noreply.github.com>
Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>
Co-authored-by: Bastian Köcher <info@kchr.de>
* tweaks from template downstream review #80
* more tweaks
* Update parachain-template/node/src/command.rs
* tweaks to template and other chainspecs
* fmt
* update more tweaks from downstream
* fix build
georgepisaltu