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Merge pull request #2293 from ralexstokes/reorder-aggregation-conditions

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Reorder Altair gossip validation conditions
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Danny Ryan 2021-04-01 11:25:10 -06:00 committed by GitHub
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specs/altair/p2p-interface.md
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@ -89,10 +89,10 @@ The following validations MUST pass before forwarding the `signed_contribution_a
- _[IGNORE]_ The block being signed over (`contribution.beacon_block_root`) has been seen (via both gossip and non-gossip sources).
- _[REJECT]_ The subcommittee index is in the allowed range, i.e. `contribution.subcommittee_index < SYNC_COMMITTEE_SUBNET_COUNT`.
- _[IGNORE]_ The sync committee contribution is the first valid contribution received for the aggregator with index `contribution_and_proof.aggregator_index` for the slot `contribution.slot`.
- _[REJECT]_ `contribution_and_proof.selection_proof` selects the validator as an aggregator for the slot -- i.e. `is_sync_committee_aggregator(state, contribution.slot, contribution_and_proof.selection_proof)` returns `True`.
- _[REJECT]_ The aggregator's validator index is within the current sync committee --
i.e. `state.validators[contribution_and_proof.aggregator_index].pubkey in state.current_sync_committee.pubkeys`.
- _[REJECT]_ The `contribution_and_proof.selection_proof` is a valid signature of the `contribution.slot` by the validator with index `contribution_and_proof.aggregator_index`.
- _[REJECT]_ `contribution_and_proof.selection_proof` selects the validator as an aggregator for the slot -- i.e. `is_sync_committee_aggregator(state, contribution.slot, contribution_and_proof.selection_proof)` returns `True`.
- _[REJECT]_ The aggregator signature, `signed_contribution_and_proof.signature`, is valid.
- _[REJECT]_ The aggregate signature is valid for the message `beacon_block_root` and aggregate pubkey derived from the participation info in `aggregation_bits` for the subcommittee specified by the `subcommittee_index`.