slashing_protection

Blox Eth Key Manager - Slashing Protector

Slashing protection implementation for eth 2.0

Slashing Rules

Slashing can occur for validators proposing a block or signing attestations which can conflict with a previous signature.

Attestation - Double Vote

Description: Do not sign 2 attestations for the same block height. eth 2 spec.

def is_slashable_attestation_data(data_1: AttestationData, data_2: AttestationData) -> bool:
   """
   Check if ``data_1`` and ``data_2`` are slashable according to Casper FFG rules.
   """
   return (
       # Double vote
       (data_1 != data_2 and data_1.target.epoch == data_2.target.epoch) or
   )

Attestation - Surrounding/Surrounded Vote

Description: Do not surround an already existing attestation/s, a.k.a do not forget them. eth 2 spec.

Surrounded:

Surrounding:

def is_slashable_attestation_data(data_1: AttestationData, data_2: AttestationData) -> bool:
   """
   Check if ``data_1`` and ``data_2`` are slashable according to Casper FFG rules.
   """
   return (
       # Surround vote
       (data_1.source.epoch < data_2.source.epoch and data_2.target.epoch < data_1.target.epoch)
   )

Proposal - Duplicate

Description: Do not propose 2 blocks for the same block height. eth 2 spec.