Struct frame_support::pallet_prelude::ValidTransaction

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pub struct ValidTransaction {
    pub priority: u64,
    pub requires: Vec<Vec<u8>>,
    pub provides: Vec<Vec<u8>>,
    pub longevity: u64,
    pub propagate: bool,
}
Expand description

Information concerning a valid transaction.

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§priority: u64

Priority of the transaction.

Priority determines the ordering of two transactions that have all their dependencies (required tags) satisfied.

§requires: Vec<Vec<u8>>

Transaction dependencies

A non-empty list signifies that some other transactions which provide given tags are required to be included before that one.

§provides: Vec<Vec<u8>>

Provided tags

A list of tags this transaction provides. Successfully importing the transaction will enable other transactions that depend on (require) those tags to be included as well. Provided and required tags allow Substrate to build a dependency graph of transactions and import them in the right (linear) order.

§longevity: u64

Transaction longevity

Longevity describes minimum number of blocks the validity is correct. After this period transaction should be removed from the pool or revalidated.

§propagate: bool

A flag indicating if the transaction should be propagated to other peers.

By setting false here the transaction will still be considered for including in blocks that are authored on the current node, but will never be sent to other peers.

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impl ValidTransaction

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pub fn with_tag_prefix(prefix: &'static str) -> ValidTransactionBuilder

Initiate ValidTransaction builder object with a particular prefix for tags.

To avoid conflicts between different parts in runtime it’s recommended to build requires and provides tags with a unique prefix.

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pub fn combine_with(self, other: ValidTransaction) -> ValidTransaction

Combine two instances into one, as a best effort. This will take the superset of each of the provides and requires tags, it will sum the priorities, take the minimum longevity and the logic And of the propagate flags.

Trait Implementations§

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impl Clone for ValidTransaction

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fn clone(&self) -> ValidTransaction

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 Debug for ValidTransaction

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

Formats the value using the given formatter. Read more
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impl Decode for ValidTransaction

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

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 Default for ValidTransaction

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fn default() -> ValidTransaction

Returns the “default value” for a type. Read more
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impl Encode for ValidTransaction

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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>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy, )
where __CodecOutputEdqy: Output + ?Sized,

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) -> R
where 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 From<ValidTransactionBuilder> for ValidTransaction

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fn from(builder: ValidTransactionBuilder) -> ValidTransaction

Converts to this type from the input type.
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impl PartialEq for ValidTransaction

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fn eq(&self, other: &ValidTransaction) -> 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 TypeInfo for ValidTransaction

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type Identity = ValidTransaction

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 EncodeLike for ValidTransaction

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impl Eq for ValidTransaction

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impl StructuralPartialEq for ValidTransaction

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