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Add zsf_deposit to transaction id and signature digest in ZIP-244 #748

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Add zsf_deposit to transaction id and signature digest in ZIP-244 #748

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35 changes: 27 additions & 8 deletions zip-0244.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -141,13 +141,14 @@ below::
│   │   ├── sapling_outputs_memos_digest
│   │   └── sapling_outputs_noncompact_digest
│   └── valueBalance
└── orchard_digest
   ├── orchard_actions_compact_digest
   ├── orchard_actions_memos_digest
   ├── orchard_actions_noncompact_digest
   ├── flagsOrchard
   ├── valueBalanceOrchard
   └── anchorOrchard
├── orchard_digest
|   ├── orchard_actions_compact_digest
|   ├── orchard_actions_memos_digest
|   ├── orchard_actions_noncompact_digest
|   ├── flagsOrchard
|   ├── valueBalanceOrchard
|   └── anchorOrchard
├── zsf_digest

Each node written as ``snake_case`` in this tree is a BLAKE2b-256 hash of its
children, initialized with a personalization string specific to that branch
Expand All @@ -162,6 +163,7 @@ A BLAKE2b-256 hash of the following values ::
T.2: transparent_digest (32-byte hash output)
T.3: sapling_digest (32-byte hash output)
T.4: orchard_digest (32-byte hash output)
T.5: zsf_deposit_digest (32-byte hash output)

The personalization field of this hash is set to::

Expand Down Expand Up @@ -447,6 +449,17 @@ The personalization field of this hash is set to::

"ZTxIdOrcActNHash"

T.5: zsf_deposit_digest
```````````````````````

A BLAKE2b-256 hash of the following values ::

T.5a: zsf_deposit (8-byte little-endian Zcash Sustainability Fund deposit amount)

The personalization field of this hash is set to::

"ZTxIdZsfDepositHash"

Signature Digest
================

Expand All @@ -464,7 +477,8 @@ described in detail below::
├── header_digest
├── transparent_sig_digest
├── sapling_digest
└── orchard_digest
├── orchard_digest
└── zsf_deposit_digest

signature_digest
----------------
Expand All @@ -474,6 +488,7 @@ A BLAKE2b-256 hash of the following values ::
S.2: transparent_sig_digest (32-byte hash output)
S.3: sapling_digest (32-byte hash output)
S.4: orchard_digest (32-byte hash output)
S.5: zsf_deposit_digest (32-byte hash output)

The personalization field of this hash is set to::

Expand Down Expand Up @@ -649,6 +664,10 @@ S.4: orchard_digest
```````````````````
Identical to that specified for the transaction identifier.

S.5: zsf_deposit_digest
```````````````````
Identical to that specified for the transaction identifier.

Authorizing Data Commitment
===========================

Expand Down