Release crates io v1.8.0 staking backport #4087
Closed
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Currently, the staking logic does not prevent a controller from becoming a stash of *another* ledger (introduced by [removing this check](https://github.com/paritytech/polkadot-sdk/pull/1484/files#diff-3aa6ceab5aa4e0ab2ed73a7245e0f5b42e0832d8ca5b1ed85d7b2a52fb196524L850)). Given that the remaining of the code expects that never happens, bonding a ledger with a stash that is a controller of another ledger may lead to data inconsistencies and data losses in bonded ledgers. For more detailed explanation of this issue: https://hackmd.io/@gpestana/HJoBm2tqo/%2FTPdi28H7Qc2mNUqLSMn15w In a nutshell, when fetching a ledger with a given controller, we may be end up getting the wrong ledger which can lead to unexpected ledger states. This PR also ensures that `set_controller` does not lead to data inconsistencies in the staking ledger and bonded storage in the case when a controller of a stash is a stash of *another* ledger. and improves the staking `try-runtime` checks to catch potential issues with the storage preemptively. In summary, there are two important cases here: 1. **"Sane" double bonded ledger** When a controller of a ledger is a stash of *another* ledger. In this case, we have: ``` > Bonded(stash, controller) (A, B) // stash A with controller B (B, C) // B is also a stash of another ledger (C, D) > Ledger(controller) Ledger(B) = L_a (stash = A) Ledger(C) = L_b (stash = B) Ledger(D) = L_c (stash = C) ``` In this case, the ledgers can be mutated and all operations are OK. However, we should not allow `set_controller` to be called if it means it results in a "corrupt" double bonded ledger (see below). 3. **"Corrupt" double bonded ledger** ``` > Bonded(stash, controller) (A, B) // stash A with controller B (B, B) (C, D) ``` In this case, B is a stash and controller AND is corrupted, since B is responsible for 2 ledgers which is not correct and will lead to inconsistent states. Thus, in this case, in this PR we are preventing these ledgers from mutating (i.e. operations like bonding extra etc) until the ledger is brought back to a consistent state. --- **Changes**: - Checks if stash is already a controller when calling `Call::bond` (fixes the regression introduced by [removing this check](https://github.com/paritytech/polkadot-sdk/pull/1484/files#diff-3aa6ceab5aa4e0ab2ed73a7245e0f5b42e0832d8ca5b1ed85d7b2a52fb196524L850)); - Ensures that all fetching ledgers from storage are done through the `StakingLedger` API; - Ensures that -- when fetching a ledger from storage using the `StakingLedger` API --, a `Error::BadState` is returned if the ledger bonding is in a bad state. This prevents bad ledgers from mutating (e.g. `bond_extra`, `set_controller`, etc) its state and avoid further data inconsistencies. - Prevents stashes which are controllers or another ledger from calling `set_controller`, since that may lead to a bad state. - Adds further try-state runtime checks that check if there are ledgers in a bad state based on their bonded metadata. Related to #3245 --------- Co-authored-by: Kian Paimani <[email protected]> Co-authored-by: kianenigma <[email protected]>
gpestana
added
the
A3-backport
|
The CI pipeline was cancelled due to failure one of the required jobs. |
kianenigma
approved these changes
Apr 15, 2024
|
closing in lieu of #4142 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This backport PR should bump the
pallet-stakingfrom 30.0.1 to 30.0.2.Backports for 1.8:
Relevant Issues:
check_payeestry-state check failing in Westend #3245