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 choosen 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 limitting. 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

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

This method tests for !=.

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

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Auto Trait Implementations

Blanket Implementations

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🔬 This is a nightly-only experimental API. (toowned_clone_into)

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