OnDemandAssignmentProvider¶

Calls¶

place_order_allow_death¶

See [Pallet::place_order_allow_death].

Attributes¶

Name	Type
max_amount	`BalanceOf<T>`
para_id	`ParaId`

Python¶

call = substrate.compose_call(
    'OnDemandAssignmentProvider', 'place_order_allow_death', {
    'max_amount': 'u128',
    'para_id': 'u32',
}
)

place_order_keep_alive¶

See [Pallet::place_order_keep_alive].

Attributes¶

Name	Type
max_amount	`BalanceOf<T>`
para_id	`ParaId`

Python¶

call = substrate.compose_call(
    'OnDemandAssignmentProvider', 'place_order_keep_alive', {
    'max_amount': 'u128',
    'para_id': 'u32',
}
)

Events¶

OnDemandOrderPlaced¶

An order was placed at some spot price amount.

Attributes¶

Name	Type	Composition
para_id	`ParaId`	`u32`
spot_price	`BalanceOf<T>`	`u128`

SpotTrafficSet¶

The value of the spot traffic multiplier changed.

Attributes¶

Name	Type	Composition
traffic	`FixedU128`	`u128`

Storage functions¶

OnDemandQueue¶

The order storage entry. Uses a VecDeque to be able to push to the front of the queue from the scheduler on session boundaries.

Python¶

result = substrate.query(
    'OnDemandAssignmentProvider', 'OnDemandQueue', []
)

Return value¶

[{'para_id': 'u32'}]

ParaIdAffinity¶

Maps a ParaId to CoreIndex and keeps track of how many assignments the scheduler has in it's lookahead. Keeping track of this affinity prevents parallel execution of the same ParaId on two or more CoreIndexes.

Python¶

result = substrate.query(
    'OnDemandAssignmentProvider', 'ParaIdAffinity', ['u32']
)

Return value¶

{'core_idx': 'u32', 'count': 'u32'}

SpotTraffic¶

Keeps track of the multiplier used to calculate the current spot price for the on demand assigner.

Python¶

result = substrate.query(
    'OnDemandAssignmentProvider', 'SpotTraffic', []
)

Return value¶

'u128'

Constants¶

TrafficDefaultValue¶

The default value for the spot traffic multiplier.

Value¶

1000000000000000000

Python¶

constant = substrate.get_constant('OnDemandAssignmentProvider', 'TrafficDefaultValue')

Errors¶

InvalidParaId¶

The ParaId supplied to the place_order call is not a valid ParaThread, making the call is invalid.

QueueFull¶

The order queue is full, place_order will not continue.

SpotPriceHigherThanMaxAmount¶

The current spot price is higher than the max amount specified in the place_order call, making it invalid.