Struct frame_system::CheckNonce

pub struct CheckNonce<T: Trait>(_);

Nonce check and increment to give replay protection for transactions.

Implementations

impl<T: Trait> CheckNonce<T>

pub fn from(nonce: T::Index) -> Self

utility constructor. Used only in client/factory code.

Trait Implementations

impl<T: Clone + Trait> Clone for CheckNonce<T> where
    T::Index: Clone, 

fn clone(&self) -> CheckNonce<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Trait> Debug for CheckNonce<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T: Trait> Decode for CheckNonce<T> where
    T::Index: HasCompact, 

fn decode<DecIn: Input>(input: &mut DecIn) -> Result<Self, Error>

Attempt to deserialise the value from input.

impl<T: Trait> Encode for CheckNonce<T> where
    T::Index: HasCompact, 

fn encode_to<EncOut: Output>(&self, dest: &mut EncOut)

Convert self to a slice and append it to the destination.

fn encode(&self) -> Vec<u8>

Convert self to an owned vector.

fn using_encoded<R, F: FnOnce(&[u8]) -> R>(&self, f: F) -> R

Convert self to a slice and then invoke the given closure with it.

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding.

impl<T: Trait> EncodeLike<CheckNonce<T>> for CheckNonce<T> where
    T::Index: HasCompact, 

impl<T: Eq + Trait> Eq for CheckNonce<T> where
    T::Index: Eq, 

impl<T: PartialEq + Trait> PartialEq<CheckNonce<T>> for CheckNonce<T> where
    T::Index: PartialEq, 

fn eq(&self, other: &CheckNonce<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &CheckNonce<T>) -> bool

This method tests for !=.

impl<T: Trait> SignedExtension for CheckNonce<T> where
    T::Call: Dispatchable<Info = DispatchInfo>, 

type AccountId = T::AccountId

The type which encodes the sender identity.

type Call = T::Call

The type which encodes the call to be dispatched.

type AdditionalSigned = ()

Any additional data that will go into the signed payload. This may be created dynamically from the transaction using the additional_signed function.

type Pre = ()

The type that encodes information that can be passed from pre_dispatch to post-dispatch.

const IDENTIFIER: &'static str

Unique identifier of this signed extension.

fn additional_signed(&self) -> Result<(), TransactionValidityError>

Construct any additional data that should be in the signed payload of the transaction. Can also perform any pre-signature-verification checks and return an error if needed.

fn pre_dispatch(
    self,
    who: &Self::AccountId,
    _call: &Self::Call,
    _info: &DispatchInfoOf<Self::Call>,
    _len: usize
) -> Result<(), TransactionValidityError>

Do any pre-flight stuff for a signed transaction.

fn validate(
    &self,
    who: &Self::AccountId,
    _call: &Self::Call,
    info: &DispatchInfoOf<Self::Call>,
    _len: usize
) -> TransactionValidity

Validate a signed transaction for the transaction queue.

fn validate_unsigned(
    _call: &Self::Call,
    _info: &<Self::Call as Dispatchable>::Info,
    _len: usize
) -> Result<ValidTransaction, TransactionValidityError>

Validate an unsigned transaction for the transaction queue.

fn pre_dispatch_unsigned(
    call: &Self::Call,
    info: &<Self::Call as Dispatchable>::Info,
    len: usize
) -> Result<Self::Pre, TransactionValidityError>

Do any pre-flight stuff for a unsigned transaction.

fn post_dispatch(
    _pre: Self::Pre,
    _info: &<Self::Call as Dispatchable>::Info,
    _post_info: &<Self::Call as Dispatchable>::PostInfo,
    _len: usize,
    _result: &Result<(), DispatchError>
) -> Result<(), TransactionValidityError>

Do any post-flight stuff for an extrinsic.

fn identifier() -> Vec<&'static str>

Returns the list of unique identifier for this signed extension.

impl<T: Trait> StructuralEq for CheckNonce<T>

impl<T: Trait> StructuralPartialEq for CheckNonce<T>