051027cb6d
git-subtree-dir: sapling-crypto git-subtree-mainline:9f748554d0git-subtree-split:21084bde20
55 lines
1.1 KiB
Rust
55 lines
1.1 KiB
Rust
use pairing::{Engine};
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use bellman::{ConstraintSystem, SynthesisError};
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use circuit::boolean::{Boolean};
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use super::*;
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use super::prfs::*;
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use super::commitment::note_comm;
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pub struct OutputNote {
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pub cm: Vec<Boolean>
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}
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impl OutputNote {
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pub fn compute<'a, E, CS>(
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mut cs: CS,
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a_pk: Option<PayingKey>,
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value: &NoteValue,
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r: Option<CommitmentRandomness>,
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phi: &[Boolean],
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h_sig: &[Boolean],
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nonce: bool
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) -> Result<Self, SynthesisError>
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where E: Engine, CS: ConstraintSystem<E>,
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{
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let rho = prf_rho(
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cs.namespace(|| "rho"),
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phi,
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h_sig,
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nonce
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)?;
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let a_pk = witness_u256(
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cs.namespace(|| "a_pk"),
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a_pk.as_ref().map(|a_pk| &a_pk.0[..])
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)?;
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let r = witness_u256(
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cs.namespace(|| "r"),
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r.as_ref().map(|r| &r.0[..])
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)?;
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let cm = note_comm(
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cs.namespace(|| "cm computation"),
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&a_pk,
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&value.bits_le(),
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&rho,
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&r
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)?;
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Ok(OutputNote {
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cm: cm
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})
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}
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}
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