absolutebi/serai
1
0
Fork 0
mirror of https://github.com/serai-dex/serai.git synced 2025-12-08 12:19:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

Incorporate check a validator won't prevent ever not having a single point of failure

Browse Source
This commit is contained in:
Luke Parker
2025-09-20 01:58:39 -04:00
parent 7b46477ca0
commit 28aea8a442
2 changed files with 37 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
substrate/validator-sets/src/lib.rs
View File

@@ -319,21 +319,6 @@ mod pallet {
}
/*
fn increase_allocation(
network: NetworkId,
account: T::AccountId,
amount: Amount,
block_reward: bool,
) -> DispatchResult {
/* TODO
// The above is_bft calls are only used to check a BFT net doesn't become non-BFT
// Check here if this call would prevent a non-BFT net from *ever* becoming BFT
if (new_allocation / allocation_per_key_share) >= (MAX_KEY_SHARES_PER_SET_U32 / 3).into() {
Err(Error::<T>::AllocationWouldPreventFaultTolerance)?;
}
*/
}
fn session_to_unlock_on_for_current_set(network: NetworkId) -> Option<Session> {
let mut to_unlock_on = Self::session(network)?;
// Move to the next session, as deallocating currently in-use stake is obviously invalid

14
substrate/validator-sets/src/sessions.rs
View File

@@ -366,6 +366,15 @@ impl<Storage: SessionsStorage> Sessions for Storage {
Err(AllocationError::AllocationLessThanKeyShare)?
}
{
let new_key_shares =
KeySharesStruct::from_allocation(new_allocation, allocation_per_key_share);
// If this would guarantee this validator will be a single point of failure, error
if ((3 * new_key_shares.0) + 1) > KeySharesStruct::MAX_PER_SET {
Err(AllocationError::IntroducesSinglePointOfFailure)?;
}
/*
If the validator set has a single point of failure, the following does nothing. If the
validator set has decentralized and doesn't have a single point of failure, the following
@@ -388,15 +397,14 @@ impl<Storage: SessionsStorage> Sessions for Storage {
if currently_tolerates_single_point_of_failure {
let old_key_shares =
KeySharesStruct::from_allocation(old_allocation, allocation_per_key_share);
let new_key_shares =
KeySharesStruct::from_allocation(new_allocation, allocation_per_key_share);
// Update the amount of expected key shares per the key shares added
let expected_key_shares = KeySharesStruct::saturating_from(
expected_key_shares.0 + (new_key_shares.0 - old_key_shares.0),
);
// If the new key shares exceeds the fault tolerance, don't allow the allocation
if new_key_shares.0 > (expected_key_shares.0 / 3) {
Err(AllocationError::IntroducesSinglePointOfFailure)?
Err(AllocationError::IntroducesSinglePointOfFailure)?;
}
}
}
}