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93 lines
2.4 KiB
Plaintext
93 lines
2.4 KiB
Plaintext
# :set syntax=pism
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# :source ../scripts/pism.vim
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constant G_VCV FixedGenerator
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constant G_VCR FixedGenerator
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constant CRH_IVK BlakePersonalization
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#constant JUBJUB_FR_CAPACITY BinarySize
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#constant NOTE_COMMIT PedersenPersonalization
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contract mint_contract
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# Value commitment
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param value U64
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param asset_id Fr
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param randomness_value Fr
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param randomness_asset Fr
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param serial Fr
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param randomness_coin Fr
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param public Point
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start
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# Witness input values
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u64_as_binary_le value param:value
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fr_as_binary_le asset_id param:asset_id
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fr_as_binary_le randomness_value param:randomness_value
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fr_as_binary_le randomness_asset param:randomness_asset
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fr_as_binary_le serial param:serial
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fr_as_binary_le randomness_coin param:randomness_coin
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witness public param:public
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assert_not_small_order public
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# Make value commitment
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# V = v * G_VCV + r * G_VCR
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ec_mul_const vcv value G_VCV
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ec_mul_const rcv randomness_value G_VCR
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ec_add cv vcv rcv
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# emit cv
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emit_ec cv
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# Make asset_id commitment
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# A = a * G_VCV + r_a * G_VCR
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ec_mul_const vca asset_id G_VCV
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ec_mul_const rca randomness_asset G_VCR
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ec_add ca vca rca
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# emit ca
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emit_ec ca
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# Make the coin
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# C = Hash(public_key, value, asset_id, serial, randomness_coin)
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# Build the preimage to hash
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alloc_binary preimage
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# public_key
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ec_repr repr_public public
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binary_extend preimage repr_public
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# value
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binary_extend preimage value
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# Fr values are 252 bits so we need to pad it with extra 0s
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# to match the Rust values which are 256 bits
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{% macro binary_put_fr(binary, var) -%}
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binary_extend {{ binary }} {{ var }}
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{% for n in range(4) %}
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alloc_const_bit zero_bit false
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binary_push {{ binary }} zero_bit
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{% endfor %}
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{%- endmacro %}
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# serial
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{{ binary_put_fr("preimage", "serial") }}
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# randomness_coin
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{{ binary_put_fr("preimage", "randomness_coin") }}
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# asset_id
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{{ binary_put_fr("preimage", "asset_id") }}
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# Public key: SubgroupPoint = 256 bits
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# Value: u64 = 64 bits
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# AssetID: Fr = 252 + 4 bits padding
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# Serial: Fr = 252 + 4 bits padding
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# Randomness coin Fr = 252 + 4 bits padding
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# TOTAL: 1088 bits for preimage
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static_assert_binary_size preimage 1088
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blake2s coin preimage CRH_IVK
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emit_binary coin
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end
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