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Remove offline participants from future DKG protocols so long as the threshold is met

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Makes RemoveParticipantDueToDkg a voted-on event instead of a Provided.
This removes the requirement for offline parties to be able to fully validate
blame, yet unfortunately lets an dishonest supermajority have an honest node
label any arbitrary node as dishonest.

Corrects a variety of `.i(...)` calls which panicked when they shouldn't have.

Cleans up a couple no-longer-used storage values.
This commit is contained in:
Luke Parker
2023-12-18 09:13:09 -05:00
parent 008da698bc
commit c8747e23c5
10 changed files with 438 additions and 267 deletions
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36
coordinator/src/tributary/db.rs
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@@ -3,6 +3,7 @@ use std::collections::HashMap;
use scale::Encode;
use borsh::{BorshSerialize, BorshDeserialize};
use ciphersuite::{group::GroupEncoding, Ciphersuite, Ristretto};
use frost::Participant;
use serai_client::validator_sets::primitives::{KeyPair, ValidatorSet};
@@ -49,27 +50,42 @@ create_db!(
TributaryBlockNumber: (block: [u8; 32]) -> u32,
LastHandledBlock: (genesis: [u8; 32]) -> [u8; 32],
FatalSlashes: (genesis: [u8; 32]) -> Vec<[u8; 32]>,
FatalSlashesAsOfDkgAttempt: (genesis: [u8; 32], attempt: u32) -> Vec<[u8; 32]>,
RemovedAsOfDkgAttempt: (genesis: [u8; 32], attempt: u32) -> Vec<[u8; 32]>,
OfflineDuringDkg: (genesis: [u8; 32]) -> Vec<[u8; 32]>,
FatallySlashed: (genesis: [u8; 32], account: [u8; 32]) -> (),
DkgShare: (genesis: [u8; 32], from: u16, to: u16) -> Vec<u8>,
PlanIds: (genesis: &[u8], block: u64) -> Vec<[u8; 32]>,
ConfirmationNonces: (genesis: [u8; 32], attempt: u32) -> HashMap<Participant, Vec<u8>>,
RemovalNonces:
(genesis: [u8; 32], removing: [u8; 32], attempt: u32) -> HashMap<Participant, Vec<u8>>,
DkgKeyPair: (genesis: [u8; 32], attempt: u32) -> KeyPair,
KeyToDkgAttempt: (key: [u8; 32]) -> u32,
DkgCompleted: (genesis: [u8; 32]) -> (),
LocallyDkgRemoved: (genesis: [u8; 32], validator: [u8; 32]) -> (),
VotedToRemove: (genesis: [u8; 32], voter: [u8; 32], to_remove: [u8; 32]) -> (),
VotesToRemove: (genesis: [u8; 32], to_remove: [u8; 32]) -> u16,
AttemptDb: (genesis: [u8; 32], topic: &Topic) -> u32,
ReattemptDb: (genesis: [u8; 32], block: u32) -> Vec<Topic>,
DataReceived: (genesis: [u8; 32], data_spec: &DataSpecification) -> u16,
DataDb: (genesis: [u8; 32], data_spec: &DataSpecification, signer_bytes: &[u8; 32]) -> Vec<u8>,
DkgShare: (genesis: [u8; 32], from: u16, to: u16) -> Vec<u8>,
ConfirmationNonces: (genesis: [u8; 32], attempt: u32) -> HashMap<Participant, Vec<u8>>,
DkgKeyPair: (genesis: [u8; 32], attempt: u32) -> KeyPair,
KeyToDkgAttempt: (key: [u8; 32]) -> u32,
DkgLocallyCompleted: (genesis: [u8; 32]) -> (),
PlanIds: (genesis: &[u8], block: u64) -> Vec<[u8; 32]>,
SignedTransactionDb: (order: &[u8], nonce: u32) -> Vec<u8>,
}
);
impl FatalSlashes {
pub fn get_as_keys(getter: &impl Get, genesis: [u8; 32]) -> Vec<<Ristretto as Ciphersuite>::G> {
FatalSlashes::get(getter, genesis)
.unwrap_or(vec![])
.iter()
.map(|key| <Ristretto as Ciphersuite>::G::from_bytes(key).unwrap())
.collect::<Vec<_>>()
}
}
impl FatallySlashed {
pub fn set_fatally_slashed(txn: &mut impl DbTxn, genesis: [u8; 32], account: [u8; 32]) {
Self::set(txn, genesis, account, &());