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im-online: don't disable offending validators#13493
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paritytech-processbot[bot] merged 1 commit intomasterfrom Mar 2, 2023
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im-online: don't disable offending validators#13493paritytech-processbot[bot] merged 1 commit intomasterfrom
paritytech-processbot[bot] merged 1 commit intomasterfrom
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Whenever a validator commits an offence it gets kicked out of the validator set. On top of that, if the offence leads to a slash the validator will also get disabled, this means that even though the validator is part of the validator set, until the era ends when it should get kicked out, it cannot author new blocks. This PR changes the behavior for "offlineness" offences, such that even if the validator gets slashed it will not be disabled and thus can participate in consensus until the end of the era (when it should still get kicked out of the validator set).
For "offlineness" offences we only trigger slashing if more than 10% of the validator set is determined to be offline. I believe there is no advantage in disabling validators for "offlineness" since they're not actively trying to attack the protocol (unlike equivocations). In the case of a systemic issue that causes all validators to be considered offline (i.e. a bug) this would make it so that no one in the validator set can author new blocks and thus halt the chain.