IncomingViewingKey

sapling_crypto::zip32

Struct IncomingViewingKey 

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pub struct IncomingViewingKey { /* private fields */ }
Expand description

A Sapling key that provides the capability to decrypt incoming notes and generate diversified Sapling payment addresses.

This key is useful for detecting received funds and memos, but is not sufficient for determining balance.

It comprises the subset of the ZIP 32 extended full viewing key that is used for the Sapling item in a ZIP 316 Unified Incoming Viewing Key.

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impl IncomingViewingKey

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pub fn from_bytes(bytes: &[u8; 64]) -> CtOption<Self>

Parses a IncomingViewingKey from its raw byte encoding.

Returns None if the bytes do not contain a valid encoding of a diversifiable Sapling incoming viewing key.

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pub fn to_bytes(&self) -> [u8; 64]

Returns the raw encoding of this IncomingViewingKey.

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pub fn prepare(&self) -> PreparedIncomingViewingKey

Returns the prepared incoming viewing key for this IVK.

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pub fn address_at( &self, j: impl Into<DiversifierIndex>, ) -> Option<PaymentAddress>

Attempts to produce a valid payment address for the given diversifier index.

Returns None if the diversifier index does not produce a valid diversifier for this IncomingViewingKey.

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pub fn address(&self, diversifier: Diversifier) -> Option<PaymentAddress>

Returns the payment address corresponding to the specified diversifier, if any.

In general, it is preferable to use find_address instead, but this method is useful in some cases for matching keys to existing payment addresses.

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pub fn find_address( &self, j: impl Into<DiversifierIndex>, ) -> Option<(DiversifierIndex, PaymentAddress)>

Finds the next valid payment address starting from the given diversifier index.

This searches the diversifier space starting at j and incrementing, to find an index which will produce a valid diversifier (a 50% probability for each index).

Returns the index at which the valid diversifier was found along with the payment address constructed using that diversifier, or None if the maximum index was reached and no valid diversifier was found.

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pub fn decrypt_diversifier( &self, addr: &PaymentAddress, ) -> Option<DiversifierIndex>

Attempts to decrypt the given address’s diversifier with this incoming viewing key.

This method extracts the diversifier from the given address and decrypts it as a diversifier index, then verifies that this diversifier index produces the same address. Decryption is attempted using both the internal and external parts of the full viewing key.

Returns the decrypted diversifier index and its scope, or None if the address was not generated from this key.

Trait Implementations§

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impl Clone for IncomingViewingKey

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fn clone(&self) -> IncomingViewingKey

Returns a duplicate of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for IncomingViewingKey

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

Formats the value using the given formatter. Read more

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