zcash_client_sqlite

Struct GapLimits

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pub struct GapLimits { /* private fields */ }
Available on crate feature transparent-inputs only.
Expand description

A data structure that can be used to configure custom gap limits for use in transparent address rotation.

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impl GapLimits

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pub fn from_parts(external: u32, internal: u32, ephemeral: u32) -> Self

Available on crate features test-dependencies or unstable only.

Constructs a new GapLimits value from its constituent parts.

The gap limits recommended for use with this crate are supplied by the Default implementation for this type.

This constructor is only available under the unstable feature, as it is not recommended for general use.

Trait Implementations§

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impl Clone for GapLimits

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fn clone(&self) -> GapLimits

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 GapLimits

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

Formats the value using the given formatter. Read more
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impl Default for GapLimits

The default gap limits supported by this implementation are:

  • external addresses: 10
  • transparent internal (change) addresses: 5
  • ephemeral addresses: 5

These limits are chosen with the following rationale:

  • At present, many wallets query light wallet servers with a set of addresses, because querying for each address independently and in a fashion that is not susceptible to clustering via timing correlation leads to undesirable delays in discovery of received funds. As such, it is desirable to minimize the number of addresses that can be “linked”, i.e. understood by the light wallet server to all belong to the same wallet.
  • For transparent change addresses and ephemeral addresses, it is always expected that an address will receive funds immediately following its generation except in the case of wallet failure.
  • For externally-scoped transparent addresses, it is desirable to use a slightly larger gap limit to account for addresses that were shared with counterparties never having been used. However, we don’t want to use the full 20-address gap limit space because it’s possible that in the future, changes to the light wallet protocol will obviate the need to query for UTXOs in a fashion that links those addresses. In such a circumstance, the gap limit will be adjusted upward and address rotation should then choose an address that is outside the current gap limit; after that change, newly generated addresses will not be exposed as linked in the view of the light wallet server.
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fn default() -> Self

Returns the “default value” for a type. Read more
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impl From<GapLimits> for GapLimits

Available on crate feature test-dependencies only.
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fn from(value: GapLimits) -> Self

Converts to this type from the input type.
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impl From<GapLimits> for GapLimits

Available on crate feature test-dependencies only.
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fn from(value: GapLimits) -> Self

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

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fn eq(&self, other: &GapLimits) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for GapLimits

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impl Eq for GapLimits

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impl StructuralPartialEq for GapLimits

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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