Struct pallet_example_basic::WatchDummy

pub struct WatchDummy<T: Config + Send + Sync>(_);

A simple signed extension that checks for the set_dummy call. In that case, it increases the priority and prints some log.

Additionally, it drops any transaction with an encoded length higher than 200 bytes. No particular reason why, just to demonstrate the power of signed extensions.

Trait Implementations

impl<T: Clone + Config + Send + Sync> Clone for WatchDummy<T>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Config + Send + Sync> Debug for WatchDummy<T>

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

Formats the value using the given formatter.

impl<T: Config + Send + Sync> Decode for WatchDummy<T>where
    PhantomData<T>: Decode,

fn decode<__CodecInputEdqy: Input>(
    __codec_input_edqy: &mut __CodecInputEdqy
) -> Result<Self, Error>

Attempt to deserialise the value from input.

fn skip<I>(input: &mut I) -> Result<(), Error>where
    I: Input,

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl<T: Config + Send + Sync> Encode for WatchDummy<T>where
    PhantomData<T>: Encode,

fn encode_to<__CodecOutputEdqy: Output + ?Sized>(
    &self,
    __codec_dest_edqy: &mut __CodecOutputEdqy
)

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.

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl<T: PartialEq + Config + Send + Sync> PartialEq<WatchDummy<T>> for WatchDummy<T>

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

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

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: Config + Send + Sync> SignedExtension for WatchDummy<T>where
    <T as Config>::RuntimeCall: IsSubType<Call<T>>,

const IDENTIFIER: &'static str = "WatchDummy"

Unique identifier of this signed extension.

type AccountId = <T as Config>::AccountId

The type which encodes the sender identity.

type Call = <T as Config>::RuntimeCall

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.

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<Self::Pre, 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<(), TransactionValidityError>

Do any pre-flight stuff for a unsigned transaction.

fn post_dispatch(
    _pre: Option<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 metadata() -> Vec<SignedExtensionMetadata, Global>

Returns the metadata for this signed extension.

impl<T> TypeInfo for WatchDummy<T>where
    PhantomData<T>: TypeInfo + 'static,
    T: Config + Send + Sync + 'static,

type Identity = WatchDummy<T>

The type identifying for which type info is provided.

fn type_info() -> Type

Returns the static type identifier for Self.

impl<T: Config + Send + Sync> EncodeLike<WatchDummy<T>> for WatchDummy<T>where
    PhantomData<T>: Encode,

impl<T: Eq + Config + Send + Sync> Eq for WatchDummy<T>

impl<T: Config + Send + Sync> StructuralEq for WatchDummy<T>

impl<T: Config + Send + Sync> StructuralPartialEq for WatchDummy<T>