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Add subnet validations for DoS resistance #1615

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merged 9 commits into from
Feb 12, 2020
Merged

Add subnet validations for DoS resistance #1615

merged 9 commits into from
Feb 12, 2020

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djrtwo
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@djrtwo djrtwo commented Feb 11, 2020 •
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Addresses #1595

Quick details for clarity on what was added/changed:

  • beacon_block
    • prevent multiple beacon blocks from same proposer in a slot
  • committee_index_beacon_attestation
    • prevent multiple attestations from same participant in a slot
  • aggregate_and_proof
    • aggregator signs aggregate_and_proof and broadcasts SignedAggregateAndProof. verify this signature in addition to the proof and attestation sig
    • prevent multiple aggregate_and_proofs from same aggregator in a slot
    • add DOMAIN_SELECTION_PROOF and DOMAIN_AGGREGATE_AND_PROOF
    • add explicit instructions in validator guide for signing these messages
  • reorder gossip conditions to put signature verifications after the cheap checks

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djrtwo commented Feb 11, 2020

cc @AgeManning @mkalinin
Thanks for the input on the issue. Take a look here if you have a moment

protolambda
protolambda reviewed Feb 11, 2020
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@protolambda protolambda added the scope:DoS protection Protect the network from Denial of Service attacks. label Feb 11, 2020
hwwhww
hwwhww reviewed Feb 11, 2020
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hwwhww
hwwhww approved these changes Feb 12, 2020
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LGTM 👍

@djrtwo djrtwo merged commit a9fae27 into dev Feb 12, 2020
@djrtwo djrtwo deleted the subnet-validations branch February 12, 2020 19:02
@djrtwo djrtwo mentioned this pull request Feb 12, 2020
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This was referenced Mar 20, 2020
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@ColinSchwarz ColinSchwarz mentioned this pull request Mar 24, 2020
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@hwwhww hwwhww hwwhww approved these changes

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