​
Calls

​
purgeKeys

Removes any session key(s) of the function caller. This doesn’t take effect until the next session. The dispatch origin of this function must be Signed and the account must be either be convertible to a validator ID using the chain’s typical addressing system (this usually means being a controller account) or directly convertible into a validator ID (which usually means being a stash account). Namespace 
api.tx.session.purgeKeys
Type 
function purgeKeys(

)

​
setKeys

Sets the session key(s) of the function caller to keys. Allows an account to set its session key prior to becoming a validator. This doesn’t take effect until the next session. The dispatch origin of this function must be signed. Namespace 
api.tx.session.setKeys
Type 
function setKeys(
  keys: SeedRuntimeSessionKeys,
  proof: Bytes
)

​
Storage

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currentIndex

Current index of the session. Namespace 
api.query.session.currentIndex
Type 
function currentIndex(

): u32

​
disabledValidators

Indices of disabled validators. The vec is always kept sorted so that we can find whether a given validator is disabled using binary search. It gets cleared when on_session_ending returns a new set of identities. Namespace 
api.query.session.disabledValidators
Type 
function disabledValidators(

): Vec<u32>

​
keyOwner

The owner of a key. The key is the KeyTypeId + the encoded key. Namespace 
api.query.session.keyOwner
Type 
function keyOwner(
  (SpCoreCryptoKeyTypeId,Bytes)
): Option<SeedPrimitivesSignatureAccountId20>

​
nextKeys

The next session keys for a validator. Namespace 
api.query.session.nextKeys
Type 
function nextKeys(
  SeedPrimitivesSignatureAccountId20
): Option<SeedRuntimeSessionKeys>

​
queuedChanged

True if the underlying economic identities or weighting behind the validators has changed in the queued validator set. Namespace 
api.query.session.queuedChanged
Type 
function queuedChanged(

): bool

​
queuedKeys

The queued keys for the next session. When the next session begins, these keys will be used to determine the validator’s session keys. Namespace 
api.query.session.queuedKeys
Type 
function queuedKeys(

): Vec<(SeedPrimitivesSignatureAccountId20,SeedRuntimeSessionKeys)>

​
validators

The current set of validators. Namespace 
api.query.session.validators
Type 
function validators(

): Vec<SeedPrimitivesSignatureAccountId20>

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Events

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NewSession

New session has happened. Note that the argument is the session index, not the block number as the type might suggest. Namespace 
api.events.session.NewSession
Type 
type NewSession = {
  session_index: u32
}

​
Errors

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DuplicatedKey

Registered duplicate key. Namespace 
api.errors.session.DuplicatedKey

​
InvalidProof

Invalid ownership proof. Namespace 
api.errors.session.InvalidProof

​
NoAccount

Key setting account is not live, so it’s impossible to associate keys. Namespace 
api.errors.session.NoAccount

​
NoAssociatedValidatorId

No associated validator ID for account. Namespace 
api.errors.session.NoAssociatedValidatorId

​
NoKeys

No keys are associated with this account. Namespace 
api.errors.session.NoKeys
undefined