Several dependencies were copied over during the extraction of this
crate's logic from `zcash_primitives`, but are in fact only required for
the protocol-specific logic. We can also remove the `std` feature flag,
since we no longer have a dependency on `blake2b_simd` that needs its
`std` flag exposed for performance.
Previously we were returning the ciphertext as a slice, and then
asserting its length within the APIs the caller passed it into. Now
instead we require the caller to define whether or not the output is
compact, to make the API more predictable.
This doesn't place any additional constraints on users of this trait,
because the assertions already prevented a full output from being passed
to a compact trial decryption API.
`Domain::derive_esk` provides sufficient information to determine
whether or not we need to enforce `EphemeralSecretKey`-specific
decryption checks, as it returns `None` for pre-ZIP 212 notes.
`Domain::parse_note_plaintext_without_memo_ivk` is used with both full
note plaintexts and compact notes, so continues to accept a slice. For
all other `Domain` APIs, we constrain the input to `NotePlaintextBytes`
or `OutPlaintextBytes` as appropriate.
Given a diversifier key, decrypts a diversifier to obtain
the diversifier index from which the diversifier was originally
produced.
Co-authored-by: str4d <jack@electriccoin.co>
This renames the `FromReceivers` trait to `UnifiedEncoding` and makes
its public methods (as well as the private to_bytes method) function in
terms of network values rather than explicit HRP arguments. It also adds
high-level encoding and decoding methods that handle conversion to and
from the Bech32m-encoded transport format for all supported types, and
then delegates to these from locations that previously used lower-level
utilities.
Sapling address generation depends only on an FVK and
a diversifier key. For the purpose of unified full viewing
keys, we need to break the dependence upon Sapling extended
full viewing keys, so this makes the address generation
methods of SaplingExtendedFullViewingKey usable without
coupling them to the ability to derive child full viewing keys.
Jack Grigg
Kris Nuttycombe
Kris Nuttycombe
ying tong