Struct TxPool 

pub struct TxPool { /* private fields */ }

A minimal transaction pool that stores pending extrinsics.

Thread-safe FIFO queue for extrinsics awaiting inclusion in a block. Does not perform validation or ordering - extrinsics are processed in submission order.

Implementations

impl TxPool

pub fn new() -> Self

Create a new empty transaction pool.

pub fn submit(&self, extrinsic: Vec<u8>) -> Result<H256, TxPoolError>

Submit an extrinsic to the pool.

Returns the blake2-256 hash of the extrinsic.

pub fn drain(&self) -> Result<Vec<Vec<u8>>, TxPoolError>

Drain all pending extrinsics from the pool.

Returns all extrinsics in FIFO order and clears the pool. Used by block builder to collect transactions for inclusion.

pub fn submit_and_drain( &self, extrinsic: Vec<u8>, ) -> Result<(H256, Vec<Vec<u8>>), TxPoolError>

Submit an extrinsic and immediately drain all pending extrinsics.

This combines submit and drain into a single lock acquisition, which is more efficient for instant-mode block building where we build immediately after receiving a transaction.

Returns a tuple of (extrinsic hash, all pending extrinsics including the new one).

pub fn pending(&self) -> Result<Vec<Vec<u8>>, TxPoolError>

Get a clone of all pending extrinsics without removing them.

pub fn len(&self) -> Result<usize, TxPoolError>

Returns the number of pending extrinsics.

pub fn is_empty(&self) -> Result<bool, TxPoolError>

Returns true if there are no pending extrinsics.

Trait Implementations

impl Default for TxPool

fn default() -> TxPool

Returns the “default value” for a type.