Trait Chain

pub trait Chain:
    Send
    + Sync
    + 'static {
    type BlockNumber: Parameter + Member + MaybeSerializeDeserialize + Hash + Copy + Default + MaybeDisplay + AtLeast32BitUnsigned + FromStr + AsPrimitive<usize> + Saturating + MaxEncodedLen;
    type Hash: Parameter + Member + MaybeSerializeDeserialize + Hash + Ord + Copy + MaybeDisplay + Default + SimpleBitOps + AsRef<[u8]> + AsMut<[u8]> + MaxEncodedLen;
    type Hasher: HashT<Output = Self::Hash>;
    type Header: Parameter + HeaderT<Number = Self::BlockNumber, Hash = Self::Hash> + HeaderIdProvider<Self::Header> + MaybeSerializeDeserialize;
    type AccountId: Parameter + Member + MaybeSerializeDeserialize + Debug + MaybeDisplay + Ord + MaxEncodedLen;
    type Balance: AtLeast32BitUnsigned + FixedPointOperand + Parameter + Member + MaybeSerializeDeserialize + Clone + Copy + Bounded + CheckedSub + PartialOrd + SaturatingAdd + Zero + TryFrom<U256> + MaxEncodedLen;
    type Nonce: Parameter + Member + MaybeSerialize + Debug + Default + MaybeDisplay + MaybeSerializeDeserialize + AtLeast32Bit + Copy + MaxEncodedLen;
    type Signature: Parameter + Verify;

    const ID: ChainId;
    const STATE_VERSION: StateVersion;

    // Required methods
    fn max_extrinsic_size() -> u32;
    fn max_extrinsic_weight() -> Weight;
}

Minimal Substrate-based chain representation that may be used from no_std environment.

Required Associated Constants

const ID: ChainId

Chain id.

const STATE_VERSION: StateVersion

Version of the state implementation used by this chain. This is directly related with the TrieLayout configuration used by the storage.

Required Associated Types

type BlockNumber: Parameter + Member + MaybeSerializeDeserialize + Hash + Copy + Default + MaybeDisplay + AtLeast32BitUnsigned + FromStr + AsPrimitive<usize> + Saturating + MaxEncodedLen

A type that fulfills the abstract idea of what a Substrate block number is.

type Hash: Parameter + Member + MaybeSerializeDeserialize + Hash + Ord + Copy + MaybeDisplay + Default + SimpleBitOps + AsRef<[u8]> + AsMut<[u8]> + MaxEncodedLen

A type that fulfills the abstract idea of what a Substrate hash is.

type Hasher: HashT<Output = Self::Hash>

A type that fulfills the abstract idea of what a Substrate hasher (a type that produces hashes) is.

type Header: Parameter + HeaderT<Number = Self::BlockNumber, Hash = Self::Hash> + HeaderIdProvider<Self::Header> + MaybeSerializeDeserialize

A type that fulfills the abstract idea of what a Substrate header is.

type AccountId: Parameter + Member + MaybeSerializeDeserialize + Debug + MaybeDisplay + Ord + MaxEncodedLen

The user account identifier type for the runtime.

type Balance: AtLeast32BitUnsigned + FixedPointOperand + Parameter + Member + MaybeSerializeDeserialize + Clone + Copy + Bounded + CheckedSub + PartialOrd + SaturatingAdd + Zero + TryFrom<U256> + MaxEncodedLen

Balance of an account in native tokens.

The chain may support multiple tokens, but this particular type is for token that is used to pay for transaction dispatch, to reward different relayers (headers, messages), etc.

type Nonce: Parameter + Member + MaybeSerialize + Debug + Default + MaybeDisplay + MaybeSerializeDeserialize + AtLeast32Bit + Copy + MaxEncodedLen

Nonce of a transaction used by the chain.

type Signature: Parameter + Verify

Signature type, used on this chain.

Required Methods

fn max_extrinsic_size() -> u32

Get the maximum size (in bytes) of a Normal extrinsic at this chain.

fn max_extrinsic_weight() -> Weight

Get the maximum weight (compute time) that a Normal extrinsic at this chain can use.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<T> Chain for T

where T: Send + Sync + 'static + UnderlyingChainProvider,

const ID: ChainId = <T::Chain as Chain>::ID

const STATE_VERSION: StateVersion = <T::Chain as Chain>::STATE_VERSION

type BlockNumber = <<T as UnderlyingChainProvider>::Chain as Chain>::BlockNumber

type Hash = <<T as UnderlyingChainProvider>::Chain as Chain>::Hash

type Hasher = <<T as UnderlyingChainProvider>::Chain as Chain>::Hasher

type Header = <<T as UnderlyingChainProvider>::Chain as Chain>::Header

type AccountId = <<T as UnderlyingChainProvider>::Chain as Chain>::AccountId

type Balance = <<T as UnderlyingChainProvider>::Chain as Chain>::Balance

type Nonce = <<T as UnderlyingChainProvider>::Chain as Chain>::Nonce

type Signature = <<T as UnderlyingChainProvider>::Chain as Chain>::Signature

impl Chain for AssetHubRococo

impl Chain for AssetHubWestend

impl Chain for BridgeHubRococo

impl Chain for BridgeHubWestend

impl Chain for PolkadotBulletin

impl Chain for Rococo

impl Chain for Westend

impl Chain for TestChain

impl Chain for TestParachainBase