gnosis/lighthouse
1
0
Fork 0
mirror of https://github.com/sigp/lighthouse.git synced 2026-03-17 20:02:43 +00:00
Code Issues Packages Projects Releases Wiki Activity

Remove saturating arith from state_processing (#1644)

Browse Source 
## Issue Addressed

Resolves #1100

## Proposed Changes

* Implement the `SafeArith` trait for `Slot` and `Epoch`, so that methods like `safe_add` become available.
* Tweak the `SafeArith` trait to allow a different `Rhs` type (analagous to `std::ops::Add`, etc).
* Add a `legacy-arith` feature to `types` and `state_processing` that conditionally enables implementations of
  the `std` ops with saturating semantics.
* Check compilation of `types` and `state_processing` _without_ `legacy-arith` on CI,
  thus guaranteeing that they only use the `SafeArith` primitives 🎉

## Additional Info

The `legacy-arith` feature gets turned on by all higher-level crates that depend on `state_processing` or `types`, thus allowing the beacon chain, networking, and other components to continue to rely on the availability of ops like `+`, `-`, `*`, etc.

**This is a consensus-breaking change**, but brings us in line with the spec, and our incompatibilities shouldn't have been reachable with any valid configuration of Eth2 parameters.
This commit is contained in:
Michael Sproul
2020-09-25 05:18:21 +00:00
parent 28b6d921c6
commit 3412a3ec54
26 changed files with 250 additions and 141 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
consensus/state_processing/src/common/slash_validator.rs
View File

@@ -23,7 +23,7 @@ pub fn slash_validator<T: EthSpec>(
state.validators[slashed_index].slashed = true;
state.validators[slashed_index].withdrawable_epoch = cmp::max(
state.validators[slashed_index].withdrawable_epoch,
epoch + Epoch::from(T::EpochsPerSlashingsVector::to_u64()),
epoch.safe_add(T::EpochsPerSlashingsVector::to_u64())?,
);
let validator_effective_balance = state.get_effective_balance(slashed_index, spec)?;
state.set_slashings(