Runtime Pallets
ElectionProviderMultiPhase
constraintsCalls
governanceFallback
Trigger the governance fallback. This can only be called when [Phase::Emergency] is enabled, as an alternative to calling [Call::set_emergency_election_result].
Namespace
setEmergencyElectionResult
Set a solution in the queue, to be handed out to the client of this pallet in the next call toElectionProvider::elect.
This can only be set by T::ForceOrigin, and only when the phase is Emergency.
The solution is not checked for any feasibility and is assumed to be trustworthy, as any feasibility check itself can in principle cause the election process to fail (due to memory/weight constrains).
Namespace
setMinimumUntrustedScore
Set a new value forMinimumUntrustedScore.
Dispatch origin must be aligned with T::ForceOrigin.
This check can be turned off by setting the value to None.
Namespace
submit
Submit a solution for the signed phase. The dispatch origin for this call must be signed. The solution is potentially queued, based on the claimed score and processed at the end of the signed phase. A deposit is reserved and recorded for the solution. Based on the outcome, the solution might be rewarded, slashed, or get all or a part of the deposit back. NamespacesubmitUnsigned
Submit a solution for the unsigned phase. The dispatch origin for this call must be none. This submission is checked on the fly. Moreover, this unsigned solution is only validated when submitted to the pool from the local node. Effectively, this means that only active validators can submit this transaction when authoring a block (similar to an inherent). To prevent any incorrect solution (and thus wasted time/weight), this transaction will panic if the solution submitted by the validator is invalid in any way, effectively putting their authoring reward at risk. No deposit or reward is associated with this submission. NamespaceStorage
currentPhase
Current phase. NamespacedesiredTargets
Desired number of targets to elect for this round. Only exists when [Snapshot] is present.
Namespace
minimumUntrustedScore
The minimum score that each ‘untrusted’ solution must attain in order to be considered feasible. Can be set viaset_minimum_untrusted_score.
Namespace
queuedSolution
Current best solution, signed or unsigned, queued to be returned uponelect.
Namespace
round
Internal counter for the number of rounds. This is useful for de-duplication of transactions submitted to the pool, and general diagnostics of the pallet. This is merely incremented once every time that an upstreamelect is called.
Namespace
signedSubmissionIndices
A sorted, bounded set of(score, index), where each index points to a value in SignedSubmissions.
We never need to process more than a single signed submission at a time. Signed submissions can be quite large, so we’re willing to pay the cost of multiple database accesses to access them one at a time instead of reading and decoding all of them at once.
Namespace
signedSubmissionNextIndex
The next index is to be assigned to an incoming signed submission. Every accepted submission is assigned a unique index; that index is bound to that particular submission for the duration of the election. On election finalization, the next index is reset to 0. We can’t just useSignedSubmissionIndices.len(), because that’s a bounded set; past its capacity, it will simply saturate. We can’t just iterate over SignedSubmissionsMap, because iteration is slow. Instead, we store the value here.
Namespace
signedSubmissionsMap
Unchecked, signed solutions. Together withSubmissionIndices, this stores a bounded set of SignedSubmissions while allowing us to keep only a single one in memory at a time.
Twox note: the key of the map is an auto-incrementing index which users cannot inspect or affect; we shouldn’t need a cryptographically secure hasher.
Namespace
snapshot
Snapshot data of the round. This is created at the beginning of the signed phase and cleared upon callingelect.
Namespace
snapshotMetadata
The metadata of the [RoundSnapshot]
Only exists when [Snapshot] is present.
Namespace
Events
ElectionFailed
An election failed. Not much can be said about which computes failed in the process. NamespaceElectionFinalized
The election has been finalized, with the given computation and score. NamespaceRewarded
An account has been rewarded for their signed submission being finalized. NamespaceSignedPhaseStarted
The signed phase of the given round has started. NamespaceSlashed
An account has been slashed for submitting an invalid signed submission. NamespaceSolutionStored
A solution was stored with the given compute. If the solution is signed, this means that it hasn’t yet been processed. If the solution is unsigned, this means that it has also been processed. Thebool is true when a previous solution was ejected to make room for this one.
Namespace
UnsignedPhaseStarted
The unsigned phase of the given round has started. NamespaceErrors
CallNotAllowed
The call is not allowed at this point. NamespaceFallbackFailed
The fallback failed NamespaceInvalidSubmissionIndex
Self::insert_submission returned an invalid index.
Namespace
MissingSnapshotMetadata
Snapshot metadata should exist but didn’t. NamespaceOcwCallWrongEra
OCW submitted solution for wrong round NamespacePreDispatchEarlySubmission
Submission was too early. NamespacePreDispatchWeakSubmission
Submission was too weak, score-wise. NamespacePreDispatchWrongWinnerCount
Wrong number of winners presented. NamespaceSignedCannotPayDeposit
The origin failed to pay the deposit. NamespaceSignedInvalidWitness
Witness data to dispatchable is invalid. NamespaceSignedQueueFull
The queue was full, and the solution was not better than any of the existing ones. NamespaceSignedTooMuchWeight
The signed submission consumes too much weight NamespaceConstants
betterSignedThreshold
The minimum amount of improvement to the solution score that defines a solution as “better” in the Signed phase. NamespacebetterUnsignedThreshold
The minimum amount of improvement to the solution score that defines a solution as “better” in the Unsigned phase. NamespacemaxElectableTargets
The maximum number of electable targets to put in the snapshot. NamespacemaxElectingVoters
The maximum number of electing voters to put in the snapshot. At the moment, snapshots are only over a single block, but once multi-block elections are introduced they will take place over multiple blocks. NamespaceminerMaxLength
NamespaceminerMaxVotesPerVoter
NamespaceminerMaxWeight
NamespaceminerTxPriority
The priority of the unsigned transaction submitted in the unsigned-phase NamespaceoffchainRepeat
The repeat threshold of the offchain worker. For example, if it is 5, that means that at least 5 blocks will elapse between attempts to submit the worker’s solution. NamespacesignedDepositBase
Base deposit for a signed solution. NamespacesignedDepositByte
Per-byte deposit for a signed solution. NamespacesignedDepositWeight
Per-weight deposit for a signed solution. NamespacesignedMaxRefunds
The maximum amount of unchecked solutions to refund the call fee for. NamespacesignedMaxSubmissions
Maximum number of signed submissions that can be queued. It is best to avoid adjusting this during an election, as it impacts downstream data structures. In particular,SignedSubmissionIndices<T> is bounded on this value. If you update this value during an election, you must ensure that SignedSubmissionIndices.len() is less than or equal to the new value. Otherwise, attempts to submit new solutions may cause a runtime panic.
Namespace
signedMaxWeight
Maximum weight of a signed solution. If [Config::MinerConfig] is being implemented to submit signed solutions (outside of this pallet), then [MinerConfig::solution_weight] is used to compare against this value.
Namespace