pub struct ChargeTransactionPayment<T: Config>(_);
Expand description

Require the transactor pay for themselves and maybe include a tip to gain additional priority in the queue.

Transaction Validity

This extension sets the priority field of TransactionValidity depending on the amount of tip being paid per weight unit.

Operational transactions will receive an additional priority bump, so that they are normally considered before regular transactions.

Implementations

utility constructor. Used only in client/factory code.

Returns the tip as being chosen by the transaction sender.

Get an appropriate priority for a transaction with the given DispatchInfo, encoded length and user-included tip.

The priority is based on the amount of tip the user is willing to pay per unit of either weight or length, depending which one is more limiting. For Operational extrinsics we add a “virtual tip” to the calculations.

The formula should simply be tip / bounded_{weight|length}, but since we are using integer division, we have no guarantees it’s going to give results in any reasonable range (might simply end up being zero). Hence we use a scaling factor: tip * (max_block_{weight|length} / bounded_{weight|length}), since given current state of-the-art blockchains, number of per-block transactions is expected to be in a range reasonable enough to not saturate the Balance type while multiplying by the tip.

Trait Implementations

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
Attempt to deserialise the value from input.
Attempt to skip the encoded value from input. Read more
Returns the fixed encoded size of the type. Read more
Convert self to a slice and append it to the destination.
Convert self to an owned vector.
Convert self to a slice and then invoke the given closure with it.
If possible give a hint of expected size of the encoding. Read more
Calculates the encoded size. Read more
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more
Unique identifier of this signed extension. Read more
The type which encodes the sender identity.
The type which encodes the call to be dispatched.
Any additional data that will go into the signed payload. This may be created dynamically from the transaction using the additional_signed function. Read more
The type that encodes information that can be passed from pre_dispatch to post-dispatch.
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. Read more
Validate a signed transaction for the transaction queue. Read more
Do any pre-flight stuff for a signed transaction. Read more
Do any post-flight stuff for an extrinsic. Read more
Validate an unsigned transaction for the transaction queue. Read more
Do any pre-flight stuff for a unsigned transaction. Read more
Returns the metadata for this signed extension. Read more
The type identifying for which type info is provided. Read more
Returns the static type identifier for Self.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
Convert from a value of T into an equivalent instance of Option<Self>. Read more
Consume self to return Some equivalent value of Option<T>. Read more
Decode Self and consume all of the given input data. Read more
Decode Self and consume all of the given input data. Read more
Decode Self with the given maximum recursion depth and advance input by the number of bytes consumed. Read more
Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait. Read more
Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait. Read more
Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s. Read more
Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s. Read more
Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait. Read more
Compare self to key and return true if they are equal.
Checks if this value is equivalent to the given key. Read more

Returns the argument unchanged.

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Cast reference.
Cast reference.
Cast mutable reference.
Cast mutable reference.

Get a reference to the inner from the outer.

Get a mutable reference to the inner from the outer.

Return an encoding of Self prepended by given slice.
The alignment of pointer.
The type for initializers.
Initializes a with the given initializer. Read more
Dereferences the given pointer. Read more
Mutably dereferences the given pointer. Read more
Drops the object pointed to by the given pointer. Read more
Should always be Self
Convert from a value of T into an equivalent instance of Self. Read more
Consume self to return an equivalent value of T. Read more
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.
The counterpart to unchecked_from.
Consume self to return an equivalent value of T.
Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more