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Implement slasher (#1567)

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This is an implementation of a slasher that lives inside the BN and can be enabled via `lighthouse bn --slasher`.

Features included in this PR:

- [x] Detection of attester slashing conditions (double votes, surrounds existing, surrounded by existing)
- [x] Integration into Lighthouse's attestation verification flow
- [x] Detection of proposer slashing conditions
- [x] Extraction of attestations from blocks as they are verified
- [x] Compression of chunks
- [x] Configurable history length
- [x] Pruning of old attestations and blocks
- [x] More tests

Future work:

* Focus on a slice of history separate from the most recent N epochs (e.g. epochs `current - K` to `current - M`)
* Run out-of-process
* Ingest attestations from the chain without a resync

Design notes are here https://hackmd.io/@sproul/HJSEklmPL
This commit is contained in:
Michael Sproul
2020-11-23 03:43:22 +00:00
parent 59b2247ab8
commit 5828ff1204
44 changed files with 3662 additions and 87 deletions
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beacon_node/store/Cargo.toml
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@@ -30,3 +30,4 @@ lazy_static = "1.4.0"
lighthouse_metrics = { path = "../../common/lighthouse_metrics" }
lru = "0.6.0"
sloggers = "1.0.1"
directory = { path = "../../common/directory" }