slash.py

# Attempt to slash validators from https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4036000
import requests

def get_attestations(slot):
    res = requests.get("https://beaconcha.in/api/v1/block/{}/attestations".format(slot))
    res.raise_for_status()
    return res.json()

def get_validator_att(atts, validator):
    return [att for att in atts["data"] if validator in att["validators"]][0]

def make_indexed(att):
    attesting_indices = sorted(att["validators"])
    data = {
        "slot": att["slot"],
        "index": att["committeeindex"],
        "beacon_block_root": att["block_root"],
        "source": { "root": att["source_root"], "epoch": att["source_epoch"] },
        "target": { "root": att["target_root"], "epoch": att["target_epoch"] },
    }
    signature = att["signature"]
    indexed_att = {
        "attesting_indices": attesting_indices,
        "data": data,
        "signature": signature
    }
    return indexed_att

def make_slashing(indexed1, indexed2):
    return {
        "attestation_1": indexed1,
        "attestation_2": indexed2
    }

def post_to_bn(slashing):
    res = requests.post("http://localhost:5052/eth/v1/beacon/pool/attester_slashings", json=slashing)
    print(res.json())
    res.raise_for_status()

def main():
    validator = 3644
    slot1 = 1267818
    slot2 = 1267822

    atts1 = get_attestations(slot1)
    atts2 = get_attestations(slot2)

    att1 = get_validator_att(atts1, validator)
    att2 = get_validator_att(atts2, validator)

    indexed1 = make_indexed(att1)
    indexed2 = make_indexed(att2)

    slashing = make_slashing(indexed1, indexed2)

    post_to_bn(slashing)

if __name__ == "__main__":
    main()