pub struct Storage {
    verified: VerifiedSet,
    tip_rejected_exact: HashMap<UnminedTxId, ExactTipRejectionError>,
    tip_rejected_same_effects: HashMap<Hash, SameEffectsTipRejectionError>,
    chain_rejected_same_effects: HashMap<SameEffectsChainRejectionError, EvictionList>,
    eviction_memory_time: Duration,
    tx_cost_limit: u64,
}
Expand description

Hold mempool verified and rejected mempool transactions.

Fields§

§verified: VerifiedSet

The set of verified transactions in the mempool.

§tip_rejected_exact: HashMap<UnminedTxId, ExactTipRejectionError>

The set of transactions rejected due to bad authorizations, or for other reasons, and their rejection reasons. These rejections only apply to the current tip.

Only transactions with the exact UnminedTxId are invalid.

§tip_rejected_same_effects: HashMap<Hash, SameEffectsTipRejectionError>

A set of transactions rejected for their effects, and their rejection reasons. These rejections only apply to the current tip.

Any transaction with the same transaction::Hash is invalid.

§chain_rejected_same_effects: HashMap<SameEffectsChainRejectionError, EvictionList>

Sets of transactions rejected for their effects, keyed by rejection reason. These rejections apply until a rollback or network upgrade.

Any transaction with the same transaction::Hash is invalid.

An EvictionList is used for both randomly evicted and expired transactions, even if it is only needed for the evicted ones. This was done just to simplify the existing code; there is no harm in having a timeout for expired transactions too since re-checking expired transactions is cheap.

§eviction_memory_time: Duration

The mempool transaction eviction age limit. Same as config::Config::eviction_memory_time.

§tx_cost_limit: u64

Max total cost of the verified mempool set, beyond which transactions are evicted to make room.

Implementations§

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impl Storage

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pub(crate) fn new(config: &Config) -> Self

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pub fn insert( &mut self, tx: VerifiedUnminedTx ) -> Result<UnminedTxId, MempoolError>

Insert a VerifiedUnminedTx into the mempool, caching any rejections.

Returns an error if the mempool’s verified transactions or rejection caches prevent this transaction from being inserted. These errors should not be propagated to peers, because the transactions are valid.

If inserting this transaction evicts other transactions, they will be tracked as SameEffectsChainRejectionError::RandomlyEvicted.

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pub fn remove_exact(&mut self, exact_wtxids: &HashSet<UnminedTxId>) -> usize

Remove transactions from the mempool via exact UnminedTxId.

For v5 transactions, transactions are matched by WTXID, using both the:

  • non-malleable transaction ID, and
  • authorizing data hash.

This matches the exact transaction, with identical blockchain effects, signatures, and proofs.

Returns the number of transactions which were removed.

Removes from the ‘verified’ set, if present. Maintains the order in which the other unmined transactions have been inserted into the mempool.

Does not add or remove from the ‘rejected’ tracking set.

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pub fn reject_and_remove_same_effects( &mut self, mined_ids: &HashSet<Hash>, transactions: Vec<Arc<Transaction>> ) -> usize

Reject and remove transactions from the mempool via non-malleable transaction::Hash.

  • For v5 transactions, transactions are matched by TXID, using only the non-malleable transaction ID. This matches any transaction with the same effect on the blockchain state, even if its signatures and proofs are different.
  • Returns the number of transactions which were removed.
  • Removes from the ‘verified’ set, if present. Maintains the order in which the other unmined transactions have been inserted into the mempool.

Reject and remove transactions from the mempool that contain any outpoints or nullifiers in the spent_outpoints or nullifiers collections that are passed in.

Returns the number of transactions that were removed.

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pub fn clear(&mut self)

Clears the whole mempool storage.

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pub fn clear_tip_rejections(&mut self)

Clears rejections that only apply to the current tip.

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fn limit_rejection_list_memory(&mut self)

Clears rejections that only apply to the current tip.

§Security

This method must be called at the end of every method that adds rejections. Otherwise, peers could make our reject lists use a lot of RAM.

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pub fn tx_ids(&self) -> impl Iterator<Item = UnminedTxId> + '_

Returns the set of UnminedTxIds in the mempool.

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pub fn transactions(&self) -> impl Iterator<Item = &UnminedTx>

Returns an iterator over the UnminedTxs in the mempool.

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pub fn full_transactions(&self) -> impl Iterator<Item = &VerifiedUnminedTx> + '_

Returns an iterator over the VerifiedUnminedTx in the set.

Each VerifiedUnminedTx contains an UnminedTx, and adds extra fields from the transaction verifier result.

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pub fn transaction_count(&self) -> usize

Returns the number of transactions in the mempool.

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pub fn total_cost(&self) -> u64

Returns the cost of the transactions in the mempool, according to ZIP-401.

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pub fn total_serialized_size(&self) -> usize

Returns the total serialized size of the verified transactions in the set.

See VerifiedSet::total_serialized_size() for details.

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pub fn transactions_exact( &self, tx_ids: HashSet<UnminedTxId> ) -> impl Iterator<Item = &UnminedTx>

Returns the set of UnminedTxes with exactly matching tx_ids in the mempool.

This matches the exact transaction, with identical blockchain effects, signatures, and proofs.

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pub fn transactions_same_effects( &self, tx_ids: HashSet<Hash> ) -> impl Iterator<Item = &UnminedTx>

Returns the set of UnminedTxes with matching transaction::Hashes in the mempool.

This matches transactions with the same effects, regardless of transaction::AuthDigest.

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pub fn contains_transaction_exact(&self, txid: &UnminedTxId) -> bool

Returns true if a transaction exactly matching an UnminedTxId is in the mempool.

This matches the exact transaction, with identical blockchain effects, signatures, and proofs.

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pub fn rejected_transaction_count(&mut self) -> usize

Returns the number of rejected UnminedTxIds or transaction::Hashes.

Transactions on multiple rejected lists are counted multiple times.

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pub fn reject(&mut self, txid: UnminedTxId, reason: RejectionError)

Add a transaction to the rejected list for the given reason.

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pub fn rejection_error(&self, txid: &UnminedTxId) -> Option<MempoolError>

Returns the rejection error if a transaction matching an UnminedTxId is in any mempool rejected list.

This matches transactions based on each rejection list’s matching rule.

Returns an arbitrary error if the transaction is in multiple lists.

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pub fn rejected_transactions( &self, tx_ids: HashSet<UnminedTxId> ) -> impl Iterator<Item = UnminedTxId> + '_

Returns the set of UnminedTxIds matching tx_ids in the rejected list.

This matches transactions based on each rejection list’s matching rule.

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pub fn contains_rejected(&self, txid: &UnminedTxId) -> bool

Returns true if a transaction matching the supplied UnminedTxId is in the mempool rejected list.

This matches transactions based on each rejection list’s matching rule.

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pub fn reject_if_needed( &mut self, txid: UnminedTxId, e: TransactionDownloadVerifyError )

Add a transaction that failed download and verification to the rejected list if needed, depending on the reason for the failure.

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pub fn remove_expired_transactions( &mut self, tip_height: Height ) -> HashSet<UnminedTxId>

Remove transactions from the mempool if they have not been mined after a specified height, per ZIP-203.

Transactions will have a new field, nExpiryHeight, which will set the block height after which transactions will be removed from the mempool if they have not been mined.

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pub fn should_download_or_verify( &mut self, txid: UnminedTxId ) -> Result<(), MempoolError>

Check if transaction should be downloaded and/or verified.

If it is already in the mempool (or in its rejected list) then it shouldn’t be downloaded/verified.

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fn update_rejected_metrics(&mut self)

Update metrics related to the rejected lists.

Must be called every time the rejected lists change.

Trait Implementations§

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impl Drop for Storage

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fn drop(&mut self)

Executes the destructor for this type. Read more

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Change the foreground color to black
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Change the foreground color to red
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Change the background color to green
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Change the foreground color to magenta
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Change the background color to magenta
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Change the foreground color to purple
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Change the background color to purple
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Change the foreground color to cyan
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Change the background color to cyan
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Change the foreground color to white
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Change the foreground color to bright black
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Change the background color to bright black
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Change the foreground color to bright red
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Change the background color to bright red
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Change the foreground color to bright green
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Change the background color to bright green
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Change the foreground color to bright yellow
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Change the background color to bright yellow
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Change the foreground color to bright blue
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Change the background color to bright blue
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Change the foreground color to bright magenta
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Change the background color to bright magenta
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Change the foreground color to bright purple
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Change the background color to bright purple
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Change the foreground color to bright cyan
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Change the background color to bright cyan
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Change the foreground color to bright white
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Change the background color to bright white
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Make the text bold
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Make the text dim
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fn italic(&self) -> ItalicDisplay<'_, Self>

Make the text italicized
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fn underline(&self) -> UnderlineDisplay<'_, Self>

Make the text italicized
Make the text blink
Make the text blink (but fast!)
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fn reversed(&self) -> ReversedDisplay<'_, Self>

Swap the foreground and background colors
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fn hidden(&self) -> HiddenDisplay<'_, Self>

Hide the text
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Cross out the text
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fn color<Color>(&self, color: Color) -> FgDynColorDisplay<'_, Color, Self>
where Color: DynColor,

Set the foreground color at runtime. Only use if you do not know which color will be used at compile-time. If the color is constant, use either OwoColorize::fg or a color-specific method, such as OwoColorize::green, Read more
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fn fg_rgb<const R: u8, const G: u8, const B: u8>( &self ) -> FgColorDisplay<'_, CustomColor<R, G, B>, Self>

Set the foreground color to a specific RGB value.
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fn bg_rgb<const R: u8, const G: u8, const B: u8>( &self ) -> BgColorDisplay<'_, CustomColor<R, G, B>, Self>

Set the background color to a specific RGB value.
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fn truecolor(&self, r: u8, g: u8, b: u8) -> FgDynColorDisplay<'_, Rgb, Self>

Sets the foreground color to an RGB value.
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Sets the background color to an RGB value.
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Apply a runtime-determined style
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Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R
where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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fn pipe_deref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R
where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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fn pipe_deref_mut<'a, T, R>( &'a mut self, func: impl FnOnce(&'a mut T) -> R ) -> R
where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<Response, Error> ResponseResult<Response, Error> for Response

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fn into_result(self) -> Result<Response, Error>

Converts the type into a Result that can be sent as a response.
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> Tap for T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Immutable access to the Borrow<B> of a value. Read more
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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Mutable access to the BorrowMut<B> of a value. Read more
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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Mutable access to the AsMut<R> view of a value. Read more
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fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Immutable access to the Deref::Target of a value. Read more
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fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Mutable access to the Deref::Target of a value. Read more
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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self

Calls .tap_mut() only in debug builds, and is erased in release builds.
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds.
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more