T.4a: orchard_actions_compact_digest (32-byte hash output) [UPDATED FOR ZSA] T.4b: orchard_actions_memos_digest (32-byte hash output) [UPDATED FOR ZSA] T.4c: orchard_actions_noncompact_digest (32-byte hash output) [UPDATED FOR ZSA] -T.4d: flagsOrchard (1 byte) -T.4e: valueBalanceOrchard (64-bit signed little-endian) -T.4f: anchorOrchard (32 bytes)+T.4d: orchard_zsa_burn_digest (32-byte hash output) [ADDED FOR ZSA] +T.4e: flagsOrchard (1 byte) +T.4f: valueBalanceOrchard (64-bit signed little-endian) +T.4g: anchorOrchard (32 bytes)
T.4a: orchard_actions_compact_digest 
A BLAKE2b-256 hash of the subset of Orchard Action information intended to be included in an updated version of the ZIP-307 12 CompactBlock format for all Orchard Actions belonging to the transaction. For each Action, the following elements are included in the hash:
T.4a.i : nullifier (field encoding bytes) @@ -494,6 +495,25 @@The
The personalization field of this hash is defined identically to ZIP 244:
"ZTxIdOrcActNHash"
T.4d: orchard_zsa_burn_digest
+ A BLAKE2b-256 hash of the data from the burn fields of the transaction. For each tuple in the + \(\mathsf{assetBurn}\) + set, the following elements are included in the hash:
+T.4d.i : assetBase (field encoding bytes) +T.4d.ii: valueBurn (field encoding bytes)+
The personalization field of this hash is set to:
+"ZTxIdOrcBurnHash"+
In case the transaction does not perform the burning of any Assets (i.e. the + \(\mathsf{assetBurn}\) + set is empty), the ''orchard_zsa_burn_digest'' is:
+BLAKE2b-256("ZTxIdOrcBurnHash", [])
+ T.4d.i: assetBase
+ The Asset Base being burnt encoded as the 32-byte representation of a point on the Pallas curve.
+T.4d.ii: valueBurn
+ Value of the Asset Base being burnt encoded as little-endian 8-byte representation of 64-bit unsigned integer (e.g. u64 in Rust) raw value.
+T.5: issuance_digest
The details of the computation of this value are in ZIP 227 7.
diff --git a/zip-0226.rst b/zip-0226.rst index 4d0e1c2f3..826cf6342 100644 --- a/zip-0226.rst +++ b/zip-0226.rst @@ -344,9 +344,10 @@ When Orchard Actions are present in the transaction, this digest is a BLAKE2b-25 T.4a: orchard_actions_compact_digest (32-byte hash output) [UPDATED FOR ZSA] T.4b: orchard_actions_memos_digest (32-byte hash output) [UPDATED FOR ZSA] T.4c: orchard_actions_noncompact_digest (32-byte hash output) [UPDATED FOR ZSA] - T.4d: flagsOrchard (1 byte) - T.4e: valueBalanceOrchard (64-bit signed little-endian) - T.4f: anchorOrchard (32 bytes) + T.4d: orchard_zsa_burn_digest (32-byte hash output) [ADDED FOR ZSA] + T.4e: flagsOrchard (1 byte) + T.4f: valueBalanceOrchard (64-bit signed little-endian) + T.4g: anchorOrchard (32 bytes) T.4a: orchard_actions_compact_digest '''''''''''''''''''''''''''''''''''' @@ -397,6 +398,36 @@ The personalization field of this hash is defined identically to ZIP 244:: "ZTxIdOrcActNHash" + +T.4d: orchard_zsa_burn_digest +''''''''''''''''''''''''''''' + +A BLAKE2b-256 hash of the data from the burn fields of the transaction. For each tuple in +the :math:`\mathsf{assetBurn}` set, the following elements are included in the hash:: + + T.4d.i : assetBase (field encoding bytes) + T.4d.ii: valueBurn (field encoding bytes) + +The personalization field of this hash is set to:: + + "ZTxIdOrcBurnHash" + +In case the transaction does not perform the burning of any Assets (i.e. the +:math:`\mathsf{assetBurn}` set is empty), the ''orchard_zsa_burn_digest'' is:: + + BLAKE2b-256("ZTxIdOrcBurnHash", []) + +T.4d.i: assetBase +................. +The Asset Base being burnt encoded as the 32-byte representation of a point on the +Pallas curve. + +T.4d.ii: valueBurn +.................. +Value of the Asset Base being burnt encoded as little-endian 8-byte representation +of 64-bit unsigned integer (e.g. u64 in Rust) raw value. + + T.5: issuance_digest ```````````````````` The details of the computation of this value are in ZIP 227 [#zip-0227-txiddigest]_.