62 lines
2.2 KiB
Python
62 lines
2.2 KiB
Python
#!/usr/bin/env python3
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import sys; assert sys.version_info[0] >= 3, "Python 3 required."
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from pyblake2 import blake2s
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from tv_output import render_args, render_tv
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from orchard_group_hash import group_hash
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from orchard_sinsemilla import sinsemilla_hash_to_point
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# https://zips.z.cash/protocol/nu5.pdf#concretespendauthsig
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SPENDING_KEY_BASE = group_hash(b'z.cash:Orchard', b'G')
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# https://zips.z.cash/protocol/nu5.pdf#commitmentsandnullifiers
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NULLIFIER_K_BASE = group_hash(b'z.cash:Orchard', b'K')
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# https://zips.z.cash/protocol/nu5.pdf#concretehomomorphiccommit
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VALUE_COMMITMENT_VALUE_BASE = group_hash(b'z.cash:Orchard-cv', b'v')
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VALUE_COMMITMENT_RANDOMNESS_BASE = group_hash(b'z.cash:Orchard-cv', b'r')
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# Used in SinsemillaCommit (https://zips.z.cash/protocol/nu5.pdf#concretesinsemillacommit)
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NOTE_COMMITMENT_BASE = group_hash(b'z.cash:Orchard-NoteCommit-r', b'')
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NOTE_COMMITMENT_Q = group_hash(b'z.cash:SinsemillaQ', b'z.cash:Orchard-NoteCommit-M')
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# Used in SinsemillaShortCommit (https://zips.z.cash/protocol/nu5.pdf#concretesinsemillacommit)
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IVK_COMMITMENT_BASE = group_hash(b'z.cash:Orchard-CommitIvk-r', b'')
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IVK_COMMITMENT_Q = group_hash(b'z.cash:SinsemillaQ', b'z.cash:Orchard-CommitIvk-M')
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# Used in SinsemillaHash (https://zips.z.cash/protocol/nu5.pdf#orchardmerklecrh)
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MERKLE_CRH_Q = group_hash(b'z.cash:SinsemillaQ', b'z.cash:Orchard-MerkleCRH')
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def main():
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render_tv(
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render_args(),
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'orchard_generators',
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(
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('skb', '[u8; 32]'),
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('nkb', '[u8; 32]'),
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('vcvb', '[u8; 32]'),
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('vcrb', '[u8; 32]'),
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('cmb', '[u8; 32]'),
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('cmq', '[u8; 32]'),
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('ivkb', '[u8; 32]'),
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('ivkq', '[u8; 32]'),
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('mcq', '[u8; 32]'),
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),
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{
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'skb': bytes(SPENDING_KEY_BASE),
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'nkb': bytes(NULLIFIER_K_BASE),
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'vcvb': bytes(VALUE_COMMITMENT_VALUE_BASE),
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'vcrb': bytes(VALUE_COMMITMENT_RANDOMNESS_BASE),
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'cmb': bytes(NOTE_COMMITMENT_BASE),
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'cmq': bytes(NOTE_COMMITMENT_Q),
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'ivkb': bytes(IVK_COMMITMENT_BASE),
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'ivkq': bytes(IVK_COMMITMENT_Q),
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'mcq': bytes(MERKLE_CRH_Q),
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},
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)
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if __name__ == '__main__':
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main()
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