ParasDisputes¶

Calls¶

force_unfreeze¶

See [Pallet::force_unfreeze].

Attributes¶

No attributes

Python¶

call = substrate.compose_call(
    'ParasDisputes', 'force_unfreeze', {}
)

Events¶

DisputeConcluded¶

A dispute has concluded for or against a candidate. \[para id, candidate hash, dispute result\]

Attributes¶

Name	Type	Composition
None	`CandidateHash`	`scale_info::12`
None	`DisputeResult`	`('Valid', 'Invalid')`

DisputeInitiated¶

A dispute has been initiated. [candidate hash, dispute location]

Attributes¶

Name	Type	Composition
None	`CandidateHash`	`scale_info::12`
None	`DisputeLocation`	`('Local', 'Remote')`

Revert¶

A dispute has concluded with supermajority against a candidate. Block authors should no longer build on top of this head and should instead revert the block at the given height. This should be the number of the child of the last known valid block in the chain.

Attributes¶

Name	Type	Composition
None	`BlockNumberFor<T>`	`u32`

Storage functions¶

BackersOnDisputes¶

Backing votes stored for each dispute. This storage is used for slashing.

Python¶

result = substrate.query(
    'ParasDisputes', 'BackersOnDisputes', ['u32', 'scale_info::12']
)

Return value¶

'scale_info::843'

Disputes¶

All ongoing or concluded disputes for the last several sessions.

Python¶

result = substrate.query(
    'ParasDisputes', 'Disputes', ['u32', 'scale_info::12']
)

Return value¶

{
    'concluded_at': (None, 'u32'),
    'start': 'u32',
    'validators_against': 'BitVec',
    'validators_for': 'BitVec',
}

Frozen¶

Whether the chain is frozen. Starts as None. When this is Some, the chain will not accept any new parachain blocks for backing or inclusion, and its value indicates the last valid block number in the chain. It can only be set back to None by governance intervention.

Python¶

result = substrate.query(
    'ParasDisputes', 'Frozen', []
)

Return value¶

(None, 'u32')

Included¶

All included blocks on the chain, as well as the block number in this chain that should be reverted back to if the candidate is disputed and determined to be invalid.

Python¶

result = substrate.query(
    'ParasDisputes', 'Included', ['u32', 'scale_info::12']
)

Return value¶

'u32'

LastPrunedSession¶

The last pruned session, if any. All data stored by this module references sessions.

Python¶

result = substrate.query(
    'ParasDisputes', 'LastPrunedSession', []
)

Return value¶

'u32'

Errors¶

AncientDisputeStatement¶

Ancient dispute statement provided.

DuplicateDisputeStatementSets¶

Duplicate dispute statement sets provided.

DuplicateStatement¶

Validator vote submitted more than once to dispute.

InvalidSignature¶

Invalid signature on statement.

MaliciousBacker¶

A dispute vote from a malicious backer.

MissingBackingVotes¶

No backing votes were provides along dispute statements.

SingleSidedDispute¶

A dispute where there are only votes on one side.

UnconfirmedDispute¶

Unconfirmed dispute statement sets provided.

ValidatorIndexOutOfBounds¶

Validator index on statement is out of bounds for session.