Crate polkadot_core_primitives

Core Polkadot types.

These core Polkadot types are used by the relay chain and the Parachains.

Modules

• v2
  V2 primitives.

Structs

• BlakeTwo256
  Blake2-256 Hash implementation.
• CandidateHash
  Unit type wrapper around Hash that represents a candidate hash.
• InboundDownwardMessage
  A wrapped version of DownwardMessage. The difference is that it has attached the block number when the message was sent.
• InboundHrmpMessage
  An HRMP message seen from the perspective of a recipient.
• OutboundHrmpMessage
  An HRMP message seen from the perspective of a sender.
• UncheckedExtrinsic
  Opaque, encoded, unchecked extrinsic. Simple blob to hold an extrinsic without committing to its format and ensure it is serialized correctly.

Traits

• HashT
  Abstraction around hashing

Type Definitions

• AccountId
  Alias to the opaque account ID type for this chain, actually a AccountId32. This is always 32 bytes.
• AccountIndex
  The type for looking up accounts. We don’t expect more than 4 billion of them.
• AccountPublic
  Alias to the public key used for this chain, actually a MultiSigner. Like the signature, this also isn’t a fixed size when encoded, as different cryptos have different size public keys.
• Balance
  The balance of an account. 128-bits (or 38 significant decimal figures) will allow for 10 m currency (10^7) at a resolution to all for one second’s worth of an annualised 50% reward be paid to a unit holder (10^11 unit denomination), or 10^18 total atomic units, to grow at 50%/year for 51 years (10^9 multiplier) for an eventual total of 10^27 units (27 significant decimal figures). We round denomination to 10^12 (12 SDF), and leave the other redundancy at the upper end so that 32 bits may be multiplied with a balance in 128 bits without worrying about overflow.
• Block
  Block type.
• BlockId
  Block ID.
• BlockNumber
  The block number type used by Polkadot. 32-bits will allow for 136 years of blocks assuming 1 block per second.
• ChainId
  Identifier for a chain. 32-bit should be plenty.
• DownwardMessage
  A message sent from the relay-chain down to a parachain.
• Hash
  A hash of some data used by the relay chain.
• Header
  Header type.
• Moment
  An instant or duration in time.
• Nonce
  Index of a transaction in the relay chain. 32-bit should be plenty.
• Remark
  The information that goes alongside a transfer_into_parachain operation. Entirely opaque, it will generally be used for identifying the reason for the transfer. Typically it will hold the destination account to which the transfer should be credited. If still more information is needed, then this should be a hash with the pre-image presented via an off-chain mechanism on the parachain.
• Signature
  Alias to type for a signature for a transaction on the relay chain. This allows one of several kinds of underlying crypto to be used, so isn’t a fixed size when encoded.