Crate polkadot_runtime_parachains

Runtime modules for parachains code.

It is crucial to include all the modules from this crate in the runtime, in particular the Initializer module, as it is responsible for initializing the state of the other modules.

Re-exports

• pub use origin::ensure_parachain;
• pub use origin::Origin;
• pub use paras::ParaLifecycle;
• pub use paras::UpgradeStrategy;

Modules

• assigner_coretime
  The parachain coretime assignment module.
• configuration
  Configuration manager for the Polkadot runtime parachains logic.
• coretime
  Extrinsics implementing the relay chain side of the Coretime interface.
• disputes
  Runtime component for handling disputes of parachain candidates.
• dmp
  To prevent Out of Memory errors on the DownwardMessageQueue, an exponential fee factor (DeliveryFeeFactor) is set. The fee factor increments exponentially after the number of messages in the DownwardMessageQueue passes a threshold. This threshold is set as:
• hrmp
• inclusion
  The inclusion pallet is responsible for inclusion and availability of scheduled parachains.
• initializer
  This module is responsible for maintaining a consistent initialization order for all other parachains modules. It’s also responsible for finalization and session change notifications.
• metrics
  Runtime declaration of the parachain metrics.
• on_demand
  The parachain on demand assignment module.
• origin
  Declaration of the parachain specific origin and a pallet that hosts it.
• paras
  The paras pallet acts as the main registry of paras.
• paras_inherent
  Provides glue code over the scheduler and inclusion modules, and accepting one inherent per block that can include new para candidates and bitfields.
• reward_points
  An implementation of the RewardValidators trait used by inclusion that employs pallet-staking to compute the rewards.
• runtime_api_impl
  Runtime API implementations for Parachains.
• scheduler
  The scheduler module for parachains and parathreads.
• session_info
  The session info pallet provides information about validator sets from prior sessions needed for approvals and disputes.
• shared
  A pallet for any shared state that other pallets may want access to.

Traits

• EnsureForParachain
  Ensure more initialization for ParaId when benchmarking. (e.g. open HRMP channels, …)
• FeeTracker
  Trait for tracking message delivery fees on a transport protocol.

Functions

• schedule_code_upgrade
  Schedules a validation code upgrade to a parachain with the given id.
• schedule_para_cleanup
  Schedule a para to be cleaned up at the start of the next session.
• schedule_para_initialize
  Schedule a para to be initialized at the start of the next session with the given genesis data.
• schedule_parachain_downgrade
  Schedule a lease holding parachain to be downgraded to an on-demand parachain.
• schedule_parathread_upgrade
  Schedule a parathread (on-demand parachain) to be upgraded to a lease holding parachain.
• set_current_head
  Sets the current parachain head with the given id.