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/// This is similar to [`ErasStakers`] but number of nominators exposed is reduced to the
/// `T::MaxNominatorRewardedPerValidator` biggest stakers.
/// (Note: the field `total` and `own` of the exposure remains unchanged).
/// This is used to limit the i/o cost for the nominator payout.
///
/// This is keyed fist by the era index to allow bulk deletion and then the stash account.
///
/// Is it removed after `HISTORY_DEPTH` eras.
/// If stakers hasn't been set or has been removed then empty exposure is returned.
pub ErasStakersClipped get(fn eras_stakers_clipped):
double_map hasher(twox_64_concat) EraIndex, hasher(twox_64_concat) T::AccountId
=> Exposure<T::AccountId, BalanceOf<T>>;
/// Similar to `ErasStakers`, this holds the preferences of validators.
/// This is keyed first by the era index to allow bulk deletion and then the stash account.
///
/// Is it removed after `HISTORY_DEPTH` eras.
// If prefs hasn't been set or has been removed then 0 commission is returned.
pub ErasValidatorPrefs get(fn eras_validator_prefs):
double_map hasher(twox_64_concat) EraIndex, hasher(twox_64_concat) T::AccountId
=> ValidatorPrefs;
/// The total validator era payout for the last `HISTORY_DEPTH` eras.
/// Eras that haven't finished yet or has been removed doesn't have reward.
pub ErasValidatorReward get(fn eras_validator_reward):
map hasher(twox_64_concat) EraIndex => Option<BalanceOf<T>>;
/// Rewards for the last `HISTORY_DEPTH` eras.
/// If reward hasn't been set or has been removed then 0 reward is returned.
pub ErasRewardPoints get(fn eras_reward_points):
map hasher(twox_64_concat) EraIndex => EraRewardPoints<T::AccountId>;
/// The total amount staked for the last `HISTORY_DEPTH` eras.
/// If total hasn't been set or has been removed then 0 stake is returned.
pub ErasTotalStake get(fn eras_total_stake):
map hasher(twox_64_concat) EraIndex => BalanceOf<T>;
pub ForceEra get(fn force_era) config(): Forcing;
/// The percentage of the slash that is distributed to reporters.
///
/// The rest of the slashed value is handled by the `Slash`.
pub SlashRewardFraction get(fn slash_reward_fraction) config(): Perbill;
/// The amount of currency given to reporters of a slash event which was
/// canceled by extraordinary circumstances (e.g. governance).
pub CanceledSlashPayout get(fn canceled_payout) config(): BalanceOf<T>;
/// All unapplied slashes that are queued for later.
map hasher(twox_64_concat) EraIndex => Vec<UnappliedSlash<T::AccountId, BalanceOf<T>>>;
/// A mapping from still-bonded eras to the first session index of that era.
///
/// Must contains information for eras for the range:
/// `[active_era - bounding_duration; active_era]`
BondedEras: Vec<(EraIndex, SessionIndex)>;
/// All slashing events on validators, mapped by era to the highest slash proportion
/// and slash value of the era.
ValidatorSlashInEra:
double_map hasher(twox_64_concat) EraIndex, hasher(twox_64_concat) T::AccountId
/// All slashing events on nominators, mapped by era to the highest slash value of the era.
NominatorSlashInEra:
double_map hasher(twox_64_concat) EraIndex, hasher(twox_64_concat) T::AccountId
/// Slashing spans for stash accounts.
SlashingSpans get(fn slashing_spans): map hasher(twox_64_concat) T::AccountId => Option<slashing::SlashingSpans>;
/// Records information about the maximum slash of a stash within a slashing span,
/// as well as how much reward has been paid out.
SpanSlash:
map hasher(twox_64_concat) (T::AccountId, slashing::SpanIndex)
/// The earliest era for which we have a pending, unapplied slash.
EarliestUnappliedSlash: Option<EraIndex>;
/// Snapshot of validators at the beginning of the current election window. This should only
/// have a value when [`EraElectionStatus`] == `ElectionStatus::Open(_)`.
pub SnapshotValidators get(fn snapshot_validators): Option<Vec<T::AccountId>>;
/// Snapshot of nominators at the beginning of the current election window. This should only
/// have a value when [`EraElectionStatus`] == `ElectionStatus::Open(_)`.
pub SnapshotNominators get(fn snapshot_nominators): Option<Vec<T::AccountId>>;
/// The next validator set. At the end of an era, if this is available (potentially from the
/// result of an offchain worker), it is immediately used. Otherwise, the on-chain election
/// is executed.
pub QueuedElected get(fn queued_elected): Option<ElectionResult<T::AccountId, BalanceOf<T>>>;
/// The score of the current [`QueuedElected`].
pub QueuedScore get(fn queued_score): Option<ElectionScore>;
/// Flag to control the execution of the offchain election. When `Open(_)`, we accept
/// solutions to be submitted.
pub EraElectionStatus get(fn era_election_status): ElectionStatus<T::BlockNumber>;
/// True if the current **planned** session is final. Note that this does not take era
/// forcing into account.
pub IsCurrentSessionFinal get(fn is_current_session_final): bool = false;
/// True if network has been upgraded to this version.
/// This is set to v3.0.0 for new networks.
StorageVersion build(|_: &GenesisConfig<T>| Releases::V4_0_0): Releases;
config(stakers):
Vec<(T::AccountId, T::AccountId, BalanceOf<T>, StakerStatus<T::AccountId>)>;
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build(|config: &GenesisConfig<T>| {
for &(ref stash, ref controller, balance, ref status) in &config.stakers {
assert!(
T::Currency::free_balance(&stash) >= balance,
"Stash does not have enough balance to bond."
);
let _ = <Module<T>>::bond(
T::Origin::from(Some(stash.clone()).into()),
T::Lookup::unlookup(controller.clone()),
balance,
RewardDestination::Staked,
);
let _ = match status {
StakerStatus::Validator => {
<Module<T>>::validate(
T::Origin::from(Some(controller.clone()).into()),
Default::default(),
)
},
StakerStatus::Nominator(votes) => {
<Module<T>>::nominate(
T::Origin::from(Some(controller.clone()).into()),
votes.iter().map(|l| T::Lookup::unlookup(l.clone())).collect(),
)
}, _ => Ok(())
};
}
pub enum Event<T> where Balance = BalanceOf<T>, <T as frame_system::Trait>::AccountId {
/// The era payout has been set; the first balance is the validator-payout; the second is
/// the remainder from the maximum amount of reward.
EraPayout(EraIndex, Balance, Balance),
/// The staker has been rewarded by this amount. \[stash, amount\]
/// One validator (and its nominators) has been slashed by the given amount.
Slash(AccountId, Balance),
/// An old slashing report from a prior era was discarded because it could
OldSlashingReportDiscarded(SessionIndex),
/// A new set of stakers was elected with the given \[compute\].
/// A new solution for the upcoming election has been stored. \[compute\]
SolutionStored(ElectionCompute),
/// An account has bonded this amount. \[stash, amount\]
///
/// NOTE: This event is only emitted when funds are bonded via a dispatchable. Notably,
/// it will not be emitted for staking rewards when they are added to stake.
Bonded(AccountId, Balance),
/// An account has unbonded this amount. \[stash, amount\]
Unbonded(AccountId, Balance),
/// An account has called `withdraw_unbonded` and removed unbonding chunks worth `Balance`
/// from the unlocking queue. \[stash, amount\]
Withdrawn(AccountId, Balance),
/// Error for the staking module.
pub enum Error for Module<T: Trait> {
/// Not a controller account.
NotController,
/// Not a stash account.
NotStash,
/// Stash is already bonded.
AlreadyBonded,
/// Controller is already paired.
AlreadyPaired,
/// Targets cannot be empty.
EmptyTargets,
/// Duplicate index.
DuplicateIndex,
/// Slash record index out of bounds.
InvalidSlashIndex,
/// Can not bond with value less than minimum balance.
InsufficientValue,
/// Can not schedule more unlock chunks.
NoMoreChunks,
/// Can not rebond without unlocking chunks.
NoUnlockChunk,
/// Attempting to target a stash that still has funds.
FundedTarget,
/// Invalid era to reward.
InvalidEraToReward,
/// Invalid number of nominations.
InvalidNumberOfNominations,
/// Items are not sorted and unique.
NotSortedAndUnique,
/// Rewards for this era have already been claimed for this validator.
AlreadyClaimed,
/// The submitted result is received out of the open window.
OffchainElectionEarlySubmission,
/// The submitted result is not as good as the one stored on chain.
OffchainElectionWeakSubmission,
/// The snapshot data of the current window is missing.
SnapshotUnavailable,
/// Incorrect number of winners were presented.
OffchainElectionBogusWinnerCount,
/// One of the submitted winners is not an active candidate on chain (index is out of range
/// in snapshot).
OffchainElectionBogusWinner,
/// Error while building the assignment type from the compact. This can happen if an index
/// is invalid, or if the weights _overflow_.
OffchainElectionBogusCompact,
/// One of the submitted nominators is not an active nominator on chain.
OffchainElectionBogusNominator,
/// One of the submitted nominators has an edge to which they have not voted on chain.
OffchainElectionBogusNomination,
/// One of the submitted nominators has an edge which is submitted before the last non-zero
/// slash of the target.
OffchainElectionSlashedNomination,
/// A self vote must only be originated from a validator to ONLY themselves.
OffchainElectionBogusSelfVote,
/// The submitted result has unknown edges that are not among the presented winners.
OffchainElectionBogusEdge,
/// The claimed score does not match with the one computed from the data.
OffchainElectionBogusScore,
/// The election size is invalid.
OffchainElectionBogusElectionSize,
/// The call is not allowed at the given time due to restrictions of election period.
CallNotAllowed,
/// Incorrect previous history depth input provided.
IncorrectHistoryDepth,
/// Incorrect number of slashing spans provided.
IncorrectSlashingSpans,
pub struct Module<T: Trait> for enum Call where origin: T::Origin {
/// Number of sessions per era.
const SessionsPerEra: SessionIndex = T::SessionsPerEra::get();
/// Number of eras that staked funds must remain bonded for.
const BondingDuration: EraIndex = T::BondingDuration::get();
/// Number of eras that slashes are deferred by, after computation.
/// This should be less than the bonding duration.
/// Set to 0 if slashes should be applied immediately, without opportunity for
/// intervention.
const SlashDeferDuration: EraIndex = T::SlashDeferDuration::get();
/// The number of blocks before the end of the era from which election submissions are allowed.
///
/// Setting this to zero will disable the offchain compute and only on-chain seq-phragmen will
/// be used.
///
/// This is bounded by being within the last session. Hence, setting it to a value more than the
/// length of a session will be pointless.
const ElectionLookahead: T::BlockNumber = T::ElectionLookahead::get();
/// Maximum number of balancing iterations to run in the offchain submission.
///
/// If set to 0, balance_solution will not be executed at all.
const MaxIterations: u32 = T::MaxIterations::get();
/// The threshold of improvement that should be provided for a new solution to be accepted.
const MinSolutionScoreBump: Perbill = T::MinSolutionScoreBump::get();
/// The maximum number of nominators rewarded for each validator.
///
/// For each validator only the `$MaxNominatorRewardedPerValidator` biggest stakers can claim
/// their reward. This used to limit the i/o cost for the nominator payout.
const MaxNominatorRewardedPerValidator: u32 = T::MaxNominatorRewardedPerValidator::get();
fn deposit_event() = default;
/// sets `ElectionStatus` to `Open(now)` where `now` is the block number at which the
/// election window has opened, if we are at the last session and less blocks than
/// `T::ElectionLookahead` is remaining until the next new session schedule. The offchain
/// worker, if applicable, will execute at the end of the current block, and solutions may
/// be submitted.
fn on_initialize(now: T::BlockNumber) -> Weight {
let mut consumed_weight = 0;
let mut add_weight = |reads, writes, weight| {
consumed_weight += T::DbWeight::get().reads_writes(reads, writes);
consumed_weight += weight;
};
if
// if we don't have any ongoing offchain compute.
Self::era_election_status().is_closed() &&
// either current session final based on the plan, or we're forcing.
(Self::is_current_session_final() || Self::will_era_be_forced())
if let Some(next_session_change) = T::NextNewSession::estimate_next_new_session(now) {
if let Some(remaining) = next_session_change.checked_sub(&now) {
if remaining <= T::ElectionLookahead::get() && !remaining.is_zero() {
// create snapshot.
let (did_snapshot, snapshot_weight) = Self::create_stakers_snapshot();
add_weight(0, 0, snapshot_weight);
if did_snapshot {
// Set the flag to make sure we don't waste any compute here in the same era
// after we have triggered the offline compute.
<EraElectionStatus<T>>::put(
ElectionStatus::<T::BlockNumber>::Open(now)
);
log!(info, "💸 Election window is Open({:?}). Snapshot created", now);
log!(warn, "💸 Failed to create snapshot at {:?}.", now);
log!(warn, "💸 Estimating next session change failed.");
add_weight(0, 0, T::NextNewSession::weight(now))
// For `era_election_status`, `is_current_session_final`, `will_era_be_forced`
add_weight(3, 0, 0);
// Additional read from `on_finalize`
add_weight(1, 0, 0);
consumed_weight
}
/// Check if the current block number is the one at which the election window has been set
/// to open. If so, it runs the offchain worker code.
fn offchain_worker(now: T::BlockNumber) {
use offchain_election::{set_check_offchain_execution_status, compute_offchain_election};
if Self::era_election_status().is_open_at(now) {
let offchain_status = set_check_offchain_execution_status::<T>(now);
if let Err(why) = offchain_status {
log!(warn, "💸 skipping offchain worker in open election window due to [{}]", why);
} else {
if let Err(e) = compute_offchain_election::<T>() {
log!(error, "💸 Error in election offchain worker: {:?}", e);
log!(debug, "💸 Executed offchain worker thread without errors.");
fn on_finalize() {
// Set the start of the first era.
if let Some(mut active_era) = Self::active_era() {
if active_era.start.is_none() {
let now_as_millis_u64 = T::UnixTime::now().as_millis().saturated_into::<u64>();
active_era.start = Some(now_as_millis_u64);
// This write only ever happens once, we don't include it in the weight in general
ActiveEra::put(active_era);
// `on_finalize` weight is tracked in `on_initialize`
fn integrity_test() {
sp_io::TestExternalities::new_empty().execute_with(||
assert!(
T::SlashDeferDuration::get() < T::BondingDuration::get() || T::BondingDuration::get() == 0,
"As per documentation, slash defer duration ({}) should be less than bonding duration ({}).",
T::SlashDeferDuration::get(),
T::BondingDuration::get(),
)
);
use sp_runtime::UpperOf;
// see the documentation of `Assignment::try_normalize`. Now we can ensure that this
// will always return `Ok`.
// 1. Maximum sum of Vec<ChainAccuracy> must fit into `UpperOf<ChainAccuracy>`.
assert!(
<usize as TryInto<UpperOf<ChainAccuracy>>>::try_into(MAX_NOMINATIONS)
.unwrap()
.checked_mul(<ChainAccuracy>::one().deconstruct().try_into().unwrap())
.is_some()
);
// 2. Maximum sum of Vec<OffchainAccuracy> must fit into `UpperOf<OffchainAccuracy>`.
assert!(
<usize as TryInto<UpperOf<OffchainAccuracy>>>::try_into(MAX_NOMINATIONS)
.unwrap()
.checked_mul(<OffchainAccuracy>::one().deconstruct().try_into().unwrap())
.is_some()
);
/// Take the origin account as a stash and lock up `value` of its balance. `controller` will
/// `value` must be more than the `minimum_balance` specified by `T::Currency`.
/// The dispatch origin for this call must be _Signed_ by the stash account.
///
/// Emits `Bonded`.
///
/// # <weight>
/// - Independent of the arguments. Moderate complexity.
/// - O(1).
/// - Three extra DB entries.
///
/// NOTE: Two of the storage writes (`Self::bonded`, `Self::payee`) are _never_ cleaned
/// unless the `origin` falls below _existential deposit_ and gets removed as dust.
/// DB Weight:
/// - Read: Bonded, Ledger, [Origin Account], Current Era, History Depth, Locks
/// - Write: Bonded, Payee, [Origin Account], Locks, Ledger
/// # </weight>
#[weight = T::WeightInfo::bond()]
controller: <T::Lookup as StaticLookup>::Source,
#[compact] value: BalanceOf<T>,
payee: RewardDestination<T::AccountId>,
let stash = ensure_signed(origin)?;
if <Bonded<T>>::contains_key(&stash) {
Err(Error::<T>::AlreadyBonded)?
let controller = T::Lookup::lookup(controller)?;
if <Ledger<T>>::contains_key(&controller) {
Err(Error::<T>::AlreadyPaired)?
// reject a bond which is considered to be _dust_.
if value < T::Currency::minimum_balance() {
Err(Error::<T>::InsufficientValue)?
}
// You're auto-bonded forever, here. We might improve this by only bonding when
// you actually validate/nominate and remove once you unbond __everything__.
<Bonded<T>>::insert(&stash, &controller);
<Payee<T>>::insert(&stash, payee);
let current_era = CurrentEra::get().unwrap_or(0);
let history_depth = Self::history_depth();
let last_reward_era = current_era.saturating_sub(history_depth);
let stash_balance = T::Currency::free_balance(&stash);
let value = value.min(stash_balance);
Self::deposit_event(RawEvent::Bonded(stash.clone(), value));
let item = StakingLedger {
stash,
total: value,
active: value,
unlocking: vec![],
claimed_rewards: (last_reward_era..current_era).collect(),
Self::update_ledger(&controller, &item);
/// Add some extra amount that have appeared in the stash `free_balance` into the balance up
/// Use this if there are additional funds in your stash account that you wish to bond.
/// Unlike [`bond`] or [`unbond`] this function does not impose any limitation on the amount
/// that can be added.
/// The dispatch origin for this call must be _Signed_ by the stash, not the controller and
/// it can be only called when [`EraElectionStatus`] is `Closed`.
///
/// Emits `Bonded`.
///
/// # <weight>
/// - Independent of the arguments. Insignificant complexity.
/// - O(1).
/// - One DB entry.
/// ------------
/// DB Weight:
/// - Read: Era Election Status, Bonded, Ledger, [Origin Account], Locks
/// - Write: [Origin Account], Locks, Ledger
/// # </weight>
#[weight = T::WeightInfo::bond_extra()]
fn bond_extra(origin, #[compact] max_additional: BalanceOf<T>) {
ensure!(Self::era_election_status().is_closed(), Error::<T>::CallNotAllowed);
let stash = ensure_signed(origin)?;
let controller = Self::bonded(&stash).ok_or(Error::<T>::NotStash)?;
let mut ledger = Self::ledger(&controller).ok_or(Error::<T>::NotController)?;
let stash_balance = T::Currency::free_balance(&stash);
if let Some(extra) = stash_balance.checked_sub(&ledger.total) {
let extra = extra.min(max_additional);
ledger.total += extra;
ledger.active += extra;
Self::deposit_event(RawEvent::Bonded(stash, extra));
Self::update_ledger(&controller, &ledger);
/// Schedule a portion of the stash to be unlocked ready for transfer out after the bond
/// period ends. If this leaves an amount actively bonded less than
/// T::Currency::minimum_balance(), then it is increased to the full amount.
/// Once the unlock period is done, you can call `withdraw_unbonded` to actually move
/// the funds out of management ready for transfer.
///
/// No more than a limited number of unlocking chunks (see `MAX_UNLOCKING_CHUNKS`)
/// can co-exists at the same time. In that case, [`Call::withdraw_unbonded`] need
/// to be called first to remove some of the chunks (if possible).
///
/// The dispatch origin for this call must be _Signed_ by the controller, not the stash.
/// And, it can be only called when [`EraElectionStatus`] is `Closed`.
/// Emits `Unbonded`.
///
///
/// # <weight>
/// - Independent of the arguments. Limited but potentially exploitable complexity.
/// - Contains a limited number of reads.
/// - Each call (requires the remainder of the bonded balance to be above `minimum_balance`)
/// will cause a new entry to be inserted into a vector (`Ledger.unlocking`) kept in storage.
/// The only way to clean the aforementioned storage item is also user-controlled via
/// `withdraw_unbonded`.
/// - One DB entry.
/// - Read: EraElectionStatus, Ledger, CurrentEra, Locks, BalanceOf Stash,
/// - Write: Locks, Ledger, BalanceOf Stash,
/// </weight>
#[weight = T::WeightInfo::unbond()]
fn unbond(origin, #[compact] value: BalanceOf<T>) {
ensure!(Self::era_election_status().is_closed(), Error::<T>::CallNotAllowed);
let controller = ensure_signed(origin)?;
let mut ledger = Self::ledger(&controller).ok_or(Error::<T>::NotController)?;
ensure!(
ledger.unlocking.len() < MAX_UNLOCKING_CHUNKS,
let mut value = value.min(ledger.active);
if !value.is_zero() {
ledger.active -= value;
// Avoid there being a dust balance left in the staking system.
if ledger.active < T::Currency::minimum_balance() {
value += ledger.active;
ledger.active = Zero::zero();
}
// Note: in case there is no current era it is fine to bond one era more.
let era = Self::current_era().unwrap_or(0) + T::BondingDuration::get();
ledger.unlocking.push(UnlockChunk { value, era });
Self::update_ledger(&controller, &ledger);
Self::deposit_event(RawEvent::Unbonded(ledger.stash, value));
/// Remove any unlocked chunks from the `unlocking` queue from our management.
/// This essentially frees up that balance to be used by the stash account to do
/// whatever it wants.
/// The dispatch origin for this call must be _Signed_ by the controller, not the stash.
/// And, it can be only called when [`EraElectionStatus`] is `Closed`.
/// Emits `Withdrawn`.
///
///
/// # <weight>
/// - Could be dependent on the `origin` argument and how much `unlocking` chunks exist.
/// It implies `consolidate_unlocked` which loops over `Ledger.unlocking`, which is
/// indirectly user-controlled. See [`unbond`] for more detail.
/// - Contains a limited number of reads, yet the size of which could be large based on `ledger`.
/// - Writes are limited to the `origin` account key.
/// ---------------
/// Complexity O(S) where S is the number of slashing spans to remove
/// - Reads: EraElectionStatus, Ledger, Current Era, Locks, [Origin Account]
/// - Writes: [Origin Account], Locks, Ledger
/// Kill:
/// - Reads: EraElectionStatus, Ledger, Current Era, Bonded, Slashing Spans, [Origin
/// Account], Locks, BalanceOf stash
/// - Writes: Bonded, Slashing Spans (if S > 0), Ledger, Payee, Validators, Nominators,
/// [Origin Account], Locks, BalanceOf stash.
/// - Writes Each: SpanSlash * S
/// NOTE: Weight annotation is the kill scenario, we refund otherwise.
/// # </weight>
#[weight = T::WeightInfo::withdraw_unbonded_kill(*num_slashing_spans)]
fn withdraw_unbonded(origin, num_slashing_spans: u32) -> DispatchResultWithPostInfo {
ensure!(Self::era_election_status().is_closed(), Error::<T>::CallNotAllowed);
let controller = ensure_signed(origin)?;
let mut ledger = Self::ledger(&controller).ok_or(Error::<T>::NotController)?;
let (stash, old_total) = (ledger.stash.clone(), ledger.total);
if let Some(current_era) = Self::current_era() {
ledger = ledger.consolidate_unlocked(current_era)
}
let post_info_weight = if ledger.unlocking.is_empty() && ledger.active.is_zero() {
// This account must have called `unbond()` with some value that caused the active
// portion to fall below existential deposit + will have no more unlocking chunks
// left. We can now safely remove all staking-related information.
Self::kill_stash(&stash, num_slashing_spans)?;
// remove the lock.
T::Currency::remove_lock(STAKING_ID, &stash);
// This is worst case scenario, so we use the full weight and return None
None
} else {
// This was the consequence of a partial unbond. just update the ledger and move on.
Self::update_ledger(&controller, &ledger);
// This is only an update, so we use less overall weight.
Some(T::WeightInfo::withdraw_unbonded_update(num_slashing_spans))
// `old_total` should never be less than the new total because
// `consolidate_unlocked` strictly subtracts balance.
if ledger.total < old_total {
// Already checked that this won't overflow by entry condition.
let value = old_total - ledger.total;
Self::deposit_event(RawEvent::Withdrawn(stash, value));
}
/// Declare the desire to validate for the origin controller.
///
/// Effects will be felt at the beginning of the next era.
/// The dispatch origin for this call must be _Signed_ by the controller, not the stash.
/// And, it can be only called when [`EraElectionStatus`] is `Closed`.
///
/// # <weight>
/// - Independent of the arguments. Insignificant complexity.
/// - Contains a limited number of reads.
/// - Writes are limited to the `origin` account key.
/// DB Weight:
/// - Read: Era Election Status, Ledger
/// - Write: Nominators, Validators
/// # </weight>
#[weight = T::WeightInfo::validate()]
pub fn validate(origin, prefs: ValidatorPrefs) {
ensure!(Self::era_election_status().is_closed(), Error::<T>::CallNotAllowed);
let controller = ensure_signed(origin)?;
let ledger = Self::ledger(&controller).ok_or(Error::<T>::NotController)?;
let stash = &ledger.stash;
<Nominators<T>>::remove(stash);
<Validators<T>>::insert(stash, prefs);
/// Declare the desire to nominate `targets` for the origin controller.
///
/// Effects will be felt at the beginning of the next era. This can only be called when
/// [`EraElectionStatus`] is `Closed`.
/// The dispatch origin for this call must be _Signed_ by the controller, not the stash.
/// And, it can be only called when [`EraElectionStatus`] is `Closed`.
///
/// # <weight>
/// - The transaction's complexity is proportional to the size of `targets` (N)
/// which is capped at CompactAssignments::LIMIT (MAX_NOMINATIONS).
/// - Both the reads and writes follow a similar pattern.
/// where N is the number of targets
/// DB Weight:
/// - Reads: Era Election Status, Ledger, Current Era
/// - Writes: Validators, Nominators
/// # </weight>
#[weight = T::WeightInfo::nominate(targets.len() as u32)]
pub fn nominate(origin, targets: Vec<<T::Lookup as StaticLookup>::Source>) {
ensure!(Self::era_election_status().is_closed(), Error::<T>::CallNotAllowed);
let controller = ensure_signed(origin)?;
let ledger = Self::ledger(&controller).ok_or(Error::<T>::NotController)?;
let stash = &ledger.stash;
ensure!(!targets.is_empty(), Error::<T>::EmptyTargets);
let targets = targets.into_iter()
.map(|t| T::Lookup::lookup(t))
.collect::<result::Result<Vec<T::AccountId>, _>>()?;
let nominations = Nominations {
targets,
// initial nominations are considered submitted at era 0. See `Nominations` doc
submitted_in: Self::current_era().unwrap_or(0),
suppressed: false,
};
<Validators<T>>::remove(stash);
<Nominators<T>>::insert(stash, &nominations);
/// Declare no desire to either validate or nominate.
/// Effects will be felt at the beginning of the next era.
/// The dispatch origin for this call must be _Signed_ by the controller, not the stash.
/// And, it can be only called when [`EraElectionStatus`] is `Closed`.
///
/// # <weight>
/// - Independent of the arguments. Insignificant complexity.
/// - Contains one read.
/// - Writes are limited to the `origin` account key.
/// DB Weight:
/// - Read: EraElectionStatus, Ledger
/// - Write: Validators, Nominators
/// # </weight>
#[weight = T::WeightInfo::chill()]
ensure!(Self::era_election_status().is_closed(), Error::<T>::CallNotAllowed);
let controller = ensure_signed(origin)?;
let ledger = Self::ledger(&controller).ok_or(Error::<T>::NotController)?;
Self::chill_stash(&ledger.stash);
/// (Re-)set the payment target for a controller.
///
/// Effects will be felt at the beginning of the next era.
/// The dispatch origin for this call must be _Signed_ by the controller, not the stash.
///
/// # <weight>
/// - Independent of the arguments. Insignificant complexity.
/// - Contains a limited number of reads.
/// - Writes are limited to the `origin` account key.
/// - DB Weight:
/// - Read: Ledger
/// - Write: Payee
/// # </weight>
#[weight = T::WeightInfo::set_payee()]
fn set_payee(origin, payee: RewardDestination<T::AccountId>) {
let controller = ensure_signed(origin)?;
let ledger = Self::ledger(&controller).ok_or(Error::<T>::NotController)?;
let stash = &ledger.stash;
<Payee<T>>::insert(stash, payee);
}
/// (Re-)set the controller of a stash.
///
/// Effects will be felt at the beginning of the next era.
///
/// The dispatch origin for this call must be _Signed_ by the stash, not the controller.
///
/// # <weight>
/// - Independent of the arguments. Insignificant complexity.
/// - Contains a limited number of reads.
/// - Writes are limited to the `origin` account key.
/// DB Weight:
/// - Read: Bonded, Ledger New Controller, Ledger Old Controller
/// - Write: Bonded, Ledger New Controller, Ledger Old Controller
/// # </weight>
#[weight = T::WeightInfo::set_controller()]
fn set_controller(origin, controller: <T::Lookup as StaticLookup>::Source) {
let stash = ensure_signed(origin)?;
let old_controller = Self::bonded(&stash).ok_or(Error::<T>::NotStash)?;
let controller = T::Lookup::lookup(controller)?;
if <Ledger<T>>::contains_key(&controller) {
Err(Error::<T>::AlreadyPaired)?
}
if controller != old_controller {
<Bonded<T>>::insert(&stash, &controller);
if let Some(l) = <Ledger<T>>::take(&old_controller) {
<Ledger<T>>::insert(&controller, l);
}
/// Sets the ideal number of validators.
///
/// The dispatch origin must be Root.
///
/// # <weight>
/// Write: Validator Count
/// # </weight>
#[weight = T::WeightInfo::set_validator_count()]
fn set_validator_count(origin, #[compact] new: u32) {
ValidatorCount::put(new);
/// Increments the ideal number of validators.
///
/// The dispatch origin must be Root.
///
/// # <weight>
/// Same as [`set_validator_count`].
#[weight = T::WeightInfo::set_validator_count()]
fn increase_validator_count(origin, #[compact] additional: u32) {
ensure_root(origin)?;
ValidatorCount::mutate(|n| *n += additional);
}
/// Scale up the ideal number of validators by a factor.
///
/// The dispatch origin must be Root.
///
/// # <weight>
/// Same as [`set_validator_count`].
#[weight = T::WeightInfo::set_validator_count()]
fn scale_validator_count(origin, factor: Percent) {
ensure_root(origin)?;
ValidatorCount::mutate(|n| *n += factor * *n);
}
/// Force there to be no new eras indefinitely.
///
/// The dispatch origin must be Root.
///
/// # <weight>
/// - No arguments.
#[weight = T::WeightInfo::force_no_eras()]
fn force_no_eras(origin) {
ForceEra::put(Forcing::ForceNone);
}
/// Force there to be a new era at the end of the next session. After this, it will be
/// reset to normal (non-forced) behaviour.
///
/// The dispatch origin must be Root.
///
/// # <weight>
/// # </weight>
#[weight = T::WeightInfo::force_new_era()]
fn force_new_era(origin) {
ForceEra::put(Forcing::ForceNew);
/// Set the validators who cannot be slashed (if any).
///
/// The dispatch origin must be Root.
///
/// # <weight>
/// - O(V)
/// - Write: Invulnerables
/// # </weight>
#[weight = T::WeightInfo::set_invulnerables(invulnerables.len() as u32)]
fn set_invulnerables(origin, invulnerables: Vec<T::AccountId>) {
<Invulnerables<T>>::put(invulnerables);
/// Force a current staker to become completely unstaked, immediately.
///
/// The dispatch origin must be Root.
///
/// # <weight>
/// O(S) where S is the number of slashing spans to be removed
/// Reads: Bonded, Slashing Spans, Account, Locks
/// Writes: Bonded, Slashing Spans (if S > 0), Ledger, Payee, Validators, Nominators, Account, Locks
/// Writes Each: SpanSlash * S
/// # </weight>
#[weight = T::WeightInfo::force_unstake(*num_slashing_spans)]
fn force_unstake(origin, stash: T::AccountId, num_slashing_spans: u32) {
Self::kill_stash(&stash, num_slashing_spans)?;
// remove the lock.
T::Currency::remove_lock(STAKING_ID, &stash);
}
/// Force there to be a new era at the end of sessions indefinitely.
///
/// The dispatch origin must be Root.
///
#[weight = T::WeightInfo::force_new_era_always()]
ForceEra::put(Forcing::ForceAlways);
}
/// Cancel enactment of a deferred slash.
///
/// Can be called by the `T::SlashCancelOrigin`.
///
/// Parameters: era and indices of the slashes for that era to kill.
/// Complexity: O(U + S)
/// with U unapplied slashes weighted with U=1000
/// and S is the number of slash indices to be canceled.
/// - Read: Unapplied Slashes
/// - Write: Unapplied Slashes
#[weight = T::WeightInfo::cancel_deferred_slash(slash_indices.len() as u32)]
fn cancel_deferred_slash(origin, era: EraIndex, slash_indices: Vec<u32>) {
T::SlashCancelOrigin::ensure_origin(origin)?;
ensure!(!slash_indices.is_empty(), Error::<T>::EmptyTargets);
ensure!(is_sorted_and_unique(&slash_indices), Error::<T>::NotSortedAndUnique);
let mut unapplied = <Self as Store>::UnappliedSlashes::get(&era);
let last_item = slash_indices[slash_indices.len() - 1];
ensure!((last_item as usize) < unapplied.len(), Error::<T>::InvalidSlashIndex);
for (removed, index) in slash_indices.into_iter().enumerate() {
let index = (index as usize) - removed;
unapplied.remove(index);
}
<Self as Store>::UnappliedSlashes::insert(&era, &unapplied);
}
/// Pay out all the stakers behind a single validator for a single era.
///
/// - `validator_stash` is the stash account of the validator. Their nominators, up to
/// `T::MaxNominatorRewardedPerValidator`, will also receive their rewards.
/// - `era` may be any era between `[current_era - history_depth; current_era]`.
///
/// The origin of this call must be _Signed_. Any account can call this function, even if
/// it is not one of the stakers.
///
/// This can only be called when [`EraElectionStatus`] is `Closed`.
///
/// # <weight>
/// - Time complexity: at most O(MaxNominatorRewardedPerValidator).
/// - Contains a limited number of reads and writes.
/// -----------
/// N is the Number of payouts for the validator (including the validator)
/// Weight:
/// - Reward Destination Staked: O(N)
/// - Reward Destination Controller (Creating): O(N)
/// - Read: EraElectionStatus, CurrentEra, HistoryDepth, ErasValidatorReward,
/// ErasStakersClipped, ErasRewardPoints, ErasValidatorPrefs (8 items)
/// - Read Each: Bonded, Ledger, Payee, Locks, System Account (5 items)
/// - Write Each: System Account, Locks, Ledger (3 items)
///
/// NOTE: weights are assuming that payouts are made to alive stash account (Staked).
/// Paying even a dead controller is cheaper weight-wise. We don't do any refunds here.
#[weight = T::WeightInfo::payout_stakers_alive_staked(T::MaxNominatorRewardedPerValidator::get())]
fn payout_stakers(origin, validator_stash: T::AccountId, era: EraIndex) -> DispatchResult {
ensure!(Self::era_election_status().is_closed(), Error::<T>::CallNotAllowed);
ensure_signed(origin)?;
Self::do_payout_stakers(validator_stash, era)
}
/// Rebond a portion of the stash scheduled to be unlocked.
///
/// The dispatch origin must be signed by the controller, and it can be only called when
/// [`EraElectionStatus`] is `Closed`.
///
/// - Time complexity: O(L), where L is unlocking chunks
/// - Bounded by `MAX_UNLOCKING_CHUNKS`.
/// - Storage changes: Can't increase storage, only decrease it.
/// ---------------
/// - DB Weight:
/// - Reads: EraElectionStatus, Ledger, Locks, [Origin Account]
/// - Writes: [Origin Account], Locks, Ledger
#[weight = T::WeightInfo::rebond(MAX_UNLOCKING_CHUNKS as u32)]
fn rebond(origin, #[compact] value: BalanceOf<T>) -> DispatchResultWithPostInfo {
ensure!(Self::era_election_status().is_closed(), Error::<T>::CallNotAllowed);
let controller = ensure_signed(origin)?;
let ledger = Self::ledger(&controller).ok_or(Error::<T>::NotController)?;
ensure!(!ledger.unlocking.is_empty(), Error::<T>::NoUnlockChunk);