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Implementers' Guide: Chain Selection (#3262)

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* high-level discussion of fork-choice and chain selection

* notes on chain-selection subsystem

* send `Approve` messages from approval-voting

* remove references to candidate-selection

* adjust grandpa voting rule docs

* Update roadmap/implementers-guide/src/node/grandpa-voting-rule.md

Co-authored-by: Lldenaurois <ljdenaurois@gmail.com>

* Update roadmap/implementers-guide/src/protocol-chain-selection.md

Co-authored-by: Lldenaurois <ljdenaurois@gmail.com>

* Update roadmap/implementers-guide/src/protocol-chain-selection.md

Co-authored-by: Lldenaurois <ljdenaurois@gmail.com>

Co-authored-by: Lldenaurois <ljdenaurois@gmail.com>
This commit is contained in:
Robert Habermeier
2021-06-17 16:10:23 +01:00
committed by GitHub
parent 4c6dc182b2
commit 9c7a346e4c
8 changed files with 116 additions and 33 deletions
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polkadot/roadmap/implementers-guide/src/protocol-disputes.md
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@@ -62,7 +62,3 @@ Validators are rewarded for providing statements to the chain as well as for par
Disputes, roughly, are over when one side reaches a ⅔ supermajority. They may also conclude after a timeout, without either side witnessing supermajority, which will only happen if the majority of validators are unable to vote for some reason. Furthermore, disputes on-chain will stay open for some fixed amount of time even after concluding, to accept new votes.
Late votes, after the dispute already reached a ⅔ supermajority, must be rewarded (albeit a smaller amount) as well.
## Chain Selection / Grandpa
The [Approval Checking](protocol-approval.md) protocol prevents finalization of chains that contain parablocks that are not yet approved. With disputes, we take it one step further and do not vote to finalize any chains which contain parablocks that are being disputed or have lost a dispute anywhere.