pub enum Call<T: Config> {
    submit_price {
        price: u32,
    },
    submit_price_unsigned {
        block_number: BlockNumberFor<T>,
        price: u32,
    },
    submit_price_unsigned_with_signed_payload {
        price_payload: PricePayload<T::Public, BlockNumberFor<T>>,
        signature: T::Signature,
    },
    // some variants omitted
}
Expand description

A public part of the pallet.

Variants§

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submit_price

Fields

§price: u32

Submit new price to the list.

This method is a public function of the module and can be called from within a transaction. It appends given price to current list of prices. In our example the offchain worker will create, sign & submit a transaction that calls this function passing the price.

The transaction needs to be signed (see ensure_signed) check, so that the caller pays a fee to execute it. This makes sure that it’s not easy (or rather cheap) to attack the chain by submitting excessive transactions, but note that it doesn’t ensure the price oracle is actually working and receives (and provides) meaningful data. This example is not focused on correctness of the oracle itself, but rather its purpose is to showcase offchain worker capabilities.

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submit_price_unsigned

Fields

§block_number: BlockNumberFor<T>
§price: u32

Submit new price to the list via unsigned transaction.

Works exactly like the submit_price function, but since we allow sending the transaction without a signature, and hence without paying any fees, we need a way to make sure that only some transactions are accepted. This function can be called only once every T::UnsignedInterval blocks. Transactions that call that function are de-duplicated on the pool level via validate_unsigned implementation and also are rendered invalid if the function has already been called in current “session”.

It’s important to specify weight for unsigned calls as well, because even though they don’t charge fees, we still don’t want a single block to contain unlimited number of such transactions.

This example is not focused on correctness of the oracle itself, but rather its purpose is to showcase offchain worker capabilities.

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submit_price_unsigned_with_signed_payload

Fields

§price_payload: PricePayload<T::Public, BlockNumberFor<T>>
§signature: T::Signature

Implementations§

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impl<T: Config> Call<T>

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pub fn new_call_variant_submit_price(price: u32) -> Self

Create a call with the variant submit_price.

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pub fn new_call_variant_submit_price_unsigned( block_number: BlockNumberFor<T>, price: u32 ) -> Self

Create a call with the variant submit_price_unsigned.

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pub fn new_call_variant_submit_price_unsigned_with_signed_payload( price_payload: PricePayload<T::Public, BlockNumberFor<T>>, signature: T::Signature ) -> Self

Create a call with the variant submit_price_unsigned_with_signed_payload.

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impl<T: Config> CheckIfFeeless for Call<T>

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type Origin = <T as Config>::RuntimeOrigin

The Origin type of the runtime.
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fn is_feeless(&self, origin: &Self::Origin) -> bool

Checks if the dispatchable satisfies the feeless condition as defined by #[pallet::feeless_if]
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impl<T: Config> Clone for Call<T>

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T: Config> Debug for Call<T>

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

Formats the value using the given formatter. Read more
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impl<T: Config> Decode for Call<T>

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

Attempt to deserialise the value from input.
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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. Read more
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fn skip<I>(input: &mut I) -> Result<(), Error>where I: Input,

Attempt to skip the encoded value from input. Read more
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fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type. Read more
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impl<T: Config> Encode for Call<T>

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fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding. Read more
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fn encode_to<__CodecOutputEdqy: Output + ?Sized>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy )

Convert self to a slice and append it to the destination.
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fn encode(&self) -> Vec<u8>

Convert self to an owned vector.
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fn using_encoded<R, F>(&self, f: F) -> Rwhere F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.
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fn encoded_size(&self) -> usize

Calculates the encoded size. Read more
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impl<T: Config> GetCallIndex for Call<T>

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fn get_call_index(&self) -> u8

Return the index of this Call.
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fn get_call_indices() -> &'static [u8]

Return all call indices in the same order as [GetCallName].
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impl<T: Config> GetCallName for Call<T>

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fn get_call_name(&self) -> &'static str

Return the function name of the Call.
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fn get_call_names() -> &'static [&'static str]

Return all function names in the same order as [GetCallIndex].
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impl<T: Config> GetDispatchInfo for Call<T>

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fn get_dispatch_info(&self) -> DispatchInfo

Return a DispatchInfo, containing relevant information of this dispatch. Read more
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impl<T: Config> PartialEq for Call<T>

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fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.
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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.
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impl<T> TypeInfo for Call<T>where PhantomData<(T,)>: TypeInfo + 'static, BlockNumberFor<T>: TypeInfo + 'static, PricePayload<T::Public, BlockNumberFor<T>>: TypeInfo + 'static, T::Signature: TypeInfo + 'static, T: Config + 'static,

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type Identity = Call<T>

The type identifying for which type info is provided. Read more
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fn type_info() -> Type

Returns the static type identifier for Self.
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impl<T: Config> UnfilteredDispatchable for Call<T>

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type RuntimeOrigin = <T as Config>::RuntimeOrigin

The origin type of the runtime, (i.e. frame_system::Config::RuntimeOrigin).
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fn dispatch_bypass_filter( self, origin: Self::RuntimeOrigin ) -> DispatchResultWithPostInfo

Dispatch this call but do not check the filter in origin.
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impl<T: Config> EncodeLike for Call<T>

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impl<T: Config> Eq for Call<T>

Auto Trait Implementations§

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impl<T> RefUnwindSafe for Call<T>where T: RefUnwindSafe, <<<T as Config>::Block as Block>::Header as Header>::Number: RefUnwindSafe, <T as SigningTypes>::Public: RefUnwindSafe, <T as SigningTypes>::Signature: RefUnwindSafe,

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impl<T> Send for Call<T>where T: Send, <T as SigningTypes>::Public: Send, <T as SigningTypes>::Signature: Send,

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impl<T> Sync for Call<T>where T: Sync, <T as SigningTypes>::Public: Sync, <T as SigningTypes>::Signature: Sync,

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impl<T> Unpin for Call<T>where T: Unpin, <<<T as Config>::Block as Block>::Header as Header>::Number: Unpin, <T as SigningTypes>::Public: Unpin, <T as SigningTypes>::Signature: Unpin,

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impl<T> UnwindSafe for Call<T>where T: UnwindSafe, <<<T as Config>::Block as Block>::Header as Header>::Number: UnwindSafe, <T as SigningTypes>::Public: UnwindSafe, <T as SigningTypes>::Signature: UnwindSafe,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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fn checked_from<T>(t: T) -> Option<Self>where Self: TryFrom<T>,

Convert from a value of T into an equivalent instance of Option<Self>. Read more
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Consume self to return Some equivalent value of Option<T>. Read more
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fn conv<T>(self) -> Twhere Self: Into<T>,

Converts self into T using Into<T>. Read more
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fn decode_all(input: &mut &[u8]) -> Result<T, Error>

Decode Self and consume all of the given input data. Read more
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Decode Self and consume all of the given input data. Read more
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Decode Self with the given maximum recursion depth and advance input by the number of bytes consumed. Read more
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fn __clone_box(&self, _: Private) -> *mut ()

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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Checks if this value is equivalent to the given key. Read more
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Compare self to key and return true if they are equal.
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Causes self to use its Binary implementation when Debug-formatted.
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Causes self to use its LowerExp implementation when Debug-formatted.
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Causes self to use its Octal implementation when Debug-formatted.
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Causes self to use its UpperExp implementation when Debug-formatted.
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Returns the argument unchanged.

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Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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const ALIGN: usize = _

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