pub struct SingleOutputChangeStrategy<R, I> { /* private fields */ }Expand description
A change strategy that proposes change as a single output. The output pool is chosen as the most current pool that avoids unnecessary pool-crossing (with a specified fallback when the transaction has no shielded inputs). Fee calculation is delegated to the provided fee rule.
Implementations§
Source§impl<R, I> SingleOutputChangeStrategy<R, I>
impl<R, I> SingleOutputChangeStrategy<R, I>
Sourcepub fn new(
fee_rule: R,
change_memo: Option<MemoBytes>,
fallback_change_pool: ShieldedProtocol,
dust_output_policy: DustOutputPolicy,
) -> Self
pub fn new( fee_rule: R, change_memo: Option<MemoBytes>, fallback_change_pool: ShieldedProtocol, dust_output_policy: DustOutputPolicy, ) -> Self
Constructs a new SingleOutputChangeStrategy with the specified ZIP 317
fee parameters and change memo.
fallback_change_pool is used when more than one shielded pool is enabled via
feature flags, and the transaction has no shielded inputs.
Trait Implementations§
Source§impl<R, I> ChangeStrategy for SingleOutputChangeStrategy<R, I>
impl<R, I> ChangeStrategy for SingleOutputChangeStrategy<R, I>
type FeeRule = R
type Error = <R as FeeRule>::Error
Source§type MetaSource = I
type MetaSource = I
The type of metadata source that this change strategy requires in order to be able to
retrieve required wallet metadata. If more capabilities are required of the backend than
are exposed in the
InputSource trait, the implementer of this trait should define their
own trait that descends from InputSource and adds the required capabilities there, and
then implement that trait for their desired database backend.Source§type AccountMetaT = ()
type AccountMetaT = ()
Tye type of wallet metadata that this change strategy relies upon in order to compute
change.
Source§fn fee_rule(&self) -> &Self::FeeRule
fn fee_rule(&self) -> &Self::FeeRule
Returns the fee rule that this change strategy will respect when performing
balance computations.
Source§fn fetch_wallet_meta(
&self,
_meta_source: &Self::MetaSource,
_account: <Self::MetaSource as InputSource>::AccountId,
_exclude: &[<Self::MetaSource as InputSource>::NoteRef],
) -> Result<Self::AccountMetaT, <Self::MetaSource as InputSource>::Error>
fn fetch_wallet_meta( &self, _meta_source: &Self::MetaSource, _account: <Self::MetaSource as InputSource>::AccountId, _exclude: &[<Self::MetaSource as InputSource>::NoteRef], ) -> Result<Self::AccountMetaT, <Self::MetaSource as InputSource>::Error>
Uses the provided metadata source to obtain the wallet metadata required for change
creation determinations.
Source§fn compute_balance<P: Parameters, NoteRefT: Clone>(
&self,
params: &P,
target_height: BlockHeight,
transparent_inputs: &[impl InputView],
transparent_outputs: &[impl OutputView],
sapling: &impl BundleView<NoteRefT>,
orchard: &impl BundleView<NoteRefT>,
ephemeral_balance: Option<&EphemeralBalance>,
_wallet_meta: &Self::AccountMetaT,
) -> Result<TransactionBalance, ChangeError<Self::Error, NoteRefT>>
fn compute_balance<P: Parameters, NoteRefT: Clone>( &self, params: &P, target_height: BlockHeight, transparent_inputs: &[impl InputView], transparent_outputs: &[impl OutputView], sapling: &impl BundleView<NoteRefT>, orchard: &impl BundleView<NoteRefT>, ephemeral_balance: Option<&EphemeralBalance>, _wallet_meta: &Self::AccountMetaT, ) -> Result<TransactionBalance, ChangeError<Self::Error, NoteRefT>>
Computes the totals of inputs, suggested change amounts, and fees given the
provided inputs and outputs being used to construct a transaction. Read more
Auto Trait Implementations§
impl<R, I> Freeze for SingleOutputChangeStrategy<R, I>where
R: Freeze,
impl<R, I> RefUnwindSafe for SingleOutputChangeStrategy<R, I>where
R: RefUnwindSafe,
I: RefUnwindSafe,
impl<R, I> Send for SingleOutputChangeStrategy<R, I>
impl<R, I> Sync for SingleOutputChangeStrategy<R, I>
impl<R, I> Unpin for SingleOutputChangeStrategy<R, I>
impl<R, I> UnwindSafe for SingleOutputChangeStrategy<R, I>where
R: UnwindSafe,
I: UnwindSafe,
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