Struct pallet_example_basic::WatchDummy

pub struct WatchDummy<T: Config + Send + Sync>(/* private fields */);

A simple transaction 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 transaction 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 decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self>, ) -> Result<DecodeFinished, Error>

where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory.

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 size_hint(&self) -> usize

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

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<__CodecOutputReturn, __CodecUsingEncodedCallback: FnOnce(&[u8]) -> __CodecOutputReturn>( &self, f: __CodecUsingEncodedCallback, ) -> __CodecOutputReturn

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

fn encoded_size(&self) -> usize

Calculates the encoded size.

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

where <T as Config>::RuntimeCall: IsSubType<Call<T>>,

const IDENTIFIER: &'static str = "WatchDummy"

Unique identifier of this signed extension.

type Implicit = ()

Any additional data which was known at the time of transaction construction and can be useful in authenticating the transaction. This is determined dynamically in part from the on-chain environment using the implicit function and not directly contained in the transaction itself and therefore is considered “implicit”.

type Pre = ()

The type that encodes information that can be passed from prepare to post_dispatch.

type Val = ()

The type that encodes information that can be passed from validate to prepare.

fn validate( &self, origin: DispatchOriginOf<<T as Config>::RuntimeCall>, call: &<T as Config>::RuntimeCall, _info: &DispatchInfoOf<<T as Config>::RuntimeCall>, len: usize, _self_implicit: Self::Implicit, _inherited_implication: &impl Encode, _source: TransactionSource, ) -> ValidateResult<Self::Val, <T as Config>::RuntimeCall>

Validate a transaction for the transaction queue.

fn weight(&self, _call: &<T as Config>::RuntimeCall) -> Weight

The weight consumed by executing this extension instance fully during transaction dispatch.

fn prepare( self, _val: Self::Val, _origin: &DispatchOriginOf<<T as Config>::RuntimeCall>, _call: &<T as Config>::RuntimeCall, _info: &DispatchInfoOf<<T as Config>::RuntimeCall>, _len: usize, ) -> Result<Self::Pre, TransactionValidityError>

Do any pre-flight stuff for a transaction after validation.

fn implicit(&self) -> Result<Self::Implicit, TransactionValidityError>

Determine any additional data which was known at the time of transaction construction and can be useful in authenticating the transaction. The expected usage of this is to include in any data which is signed and verified as part of transaction validation. Also perform any pre-signature-verification checks and return an error if needed.

fn metadata() -> Vec<TransactionExtensionMetadata>

Returns the metadata for this extension.

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

Do any post-flight stuff for an extrinsic.

fn post_dispatch( pre: Self::Pre, info: &<Call as Dispatchable>::Info, post_info: &mut <Call as Dispatchable>::PostInfo, len: usize, result: &Result<(), DispatchError>, ) -> Result<(), TransactionValidityError>

A wrapper for post_dispatch_details that refunds the unspent weight consumed by this extension into the post dispatch information.

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

Validation logic for bare extrinsics.

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

All pre-flight logic run before dispatching bare extrinsics.

fn bare_post_dispatch( _info: &<Call as Dispatchable>::Info, _post_info: &mut <Call as Dispatchable>::PostInfo, _len: usize, _result: &Result<(), DispatchError>, ) -> Result<(), TransactionValidityError>

Post dispatch logic run after dispatching bare extrinsics.

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 for WatchDummy<T>

where PhantomData<T>: Encode,

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

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