Module zebra_chain::sapling::keys

Sapling key types.

Unused key types are not implemented, see PR #5476.

“The spend authorizing key ask, proof authorizing key (ak, nsk), full viewing key (ak, nk, ovk), incoming viewing key ivk, and each diversified payment address addr_d = (d, pk_d ) are derived from sk, as described in Sapling Key Components.” - §3.1

Structs

• Diversifier
  A Diversifier, as described in protocol specification §4.2.2.
• EphemeralPublicKey
  An ephemeral public key for Sapling key agreement.
• TransmissionKey
  A (diversified) TransmissionKey
• ValidatingKey
  A randomized validating key that should be used to validate spendAuthSig.

Constants

• RANDOMNESS_BEACON_URS 🔒
  The Randomness Beacon (“URS”).
• _IMPL_ARBITRARY_FOR_Diversifier 🔒

Functions

• diversify_hash 🔒
  Used to derive a diversified base point from a diversifier value.
• find_group_hash 🔒
  FindGroupHash for JubJub, from zcash_primitives
• jubjub_group_hash 🔒
  GroupHash into Jubjub, aka GroupHash_URS