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: ShieldedPool,
dust_output_policy: DustOutputPolicy,
) -> Self
pub fn new( fee_rule: R, change_memo: Option<MemoBytes>, fallback_change_pool: ShieldedPool, 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.
Sourcepub fn with_transparent_change_policy(
self,
transparent_change_policy: TransparentChangePolicy,
) -> Self
Available on crate feature transparent-inputs only.
pub fn with_transparent_change_policy( self, transparent_change_policy: TransparentChangePolicy, ) -> Self
transparent-inputs only.Sets the TransparentChangePolicy to be used by this change strategy, determining
whether change may be returned to the transparent pool when the flows of the transaction
under construction are fully transparent.
The default is TransparentChangePolicy::ShieldChange. This policy has no effect on
transactions that involve any shielded flows.
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.
Source§type AccountMetaT = ChangeReceivers
type AccountMetaT = ChangeReceivers
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 MetaSource>::AccountId,
_target_height: TargetHeight,
_exclude: &[<Self::MetaSource as MetaSource>::NoteRef],
) -> Result<Self::AccountMetaT, <Self::MetaSource as MetaSource>::Error>
fn fetch_wallet_meta( &self, meta_source: &Self::MetaSource, account: <Self::MetaSource as MetaSource>::AccountId, _target_height: TargetHeight, _exclude: &[<Self::MetaSource as MetaSource>::NoteRef], ) -> Result<Self::AccountMetaT, <Self::MetaSource as MetaSource>::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: TargetHeight,
anchor_height: BlockHeight,
zip318: &PoolMigrationParams,
transparent_inputs: &[impl InputView],
transparent_outputs: &[impl OutputView],
sapling: &impl BundleView<NoteRefT>,
orchard: &impl BundleView<NoteRefT>,
ironwood: &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: TargetHeight, anchor_height: BlockHeight, zip318: &PoolMigrationParams, transparent_inputs: &[impl InputView], transparent_outputs: &[impl OutputView], sapling: &impl BundleView<NoteRefT>, orchard: &impl BundleView<NoteRefT>, ironwood: &impl BundleView<NoteRefT>, ephemeral_balance: Option<EphemeralBalance>, wallet_meta: &Self::AccountMetaT, ) -> Result<TransactionBalance, ChangeError<Self::Error, NoteRefT>>
Available on crate feature
orchard only.Auto Trait Implementations§
impl<R, I> Freeze for SingleOutputChangeStrategy<R, I>
impl<R, I> RefUnwindSafe for SingleOutputChangeStrategy<R, I>
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> UnsafeUnpin for SingleOutputChangeStrategy<R, I>
impl<R, I> UnwindSafe for SingleOutputChangeStrategy<R, I>
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