Module polkadot_parachain::primitives

Primitive types which are strictly necessary from a parachain-execution point of view.

Structs

• BlockData
  Parachain block data.
• HeadData
  Parachain head data included in the chain.
• HrmpChannelId
  A type that uniquely identifies an HRMP channel. An HRMP channel is established between two paras. In text, we use the notation (A, B) to specify a channel between A and B. The channels are unidirectional, meaning that (A, B) and (B, A) refer to different channels. The convention is that we use the first item tuple for the sender and the second for the recipient. Only one channel is allowed between two participants in one direction, i.e. there cannot be 2 different channels identified by (A, B). A channel with the same para id in sender and recipient is invalid. That is, however, not enforced.
• Id
  Unique identifier of a parachain.
• Sibling
• ValidationCode
  Parachain validation code.
• ValidationCodeHash
  Unit type wrapper around Hash that represents a validation code hash.
• ValidationParams
  Validation parameters for evaluating the parachain validity function.
• ValidationResult
  The result of parachain validation.

Enums

• XcmpMessageFormat
  The aggregate XCMP message format.

Constants

• LOWEST_PUBLIC_ID
  The ID of the first publicly registerable parachain.
• LOWEST_USER_ID
  The ID of the first user (non-system) parachain.

Traits

• DmpMessageHandler
  Something that should be called when a downward message is received.
• IsSystem
  Determine if a parachain is a system parachain or not.
• XcmpMessageHandler
  Something that should be called for each batch of messages received over XCMP.

Type Definitions

• RelayChainBlockNumber
  Block number type used by the relay chain. The block number type used by Polkadot. 32-bits will allow for 136 years of blocks assuming 1 block per second.
• UpwardMessage
  A message from a parachain to its Relay Chain.