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33 lines
728 B
33 lines
728 B
use super::CommitmentScheme;
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use crate::Error;
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use blake2::Blake2s as b2s;
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use digest::Digest;
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use rand::Rng;
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pub struct Commitment;
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#[cfg(feature = "r1cs")]
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pub mod constraints;
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impl CommitmentScheme for Commitment {
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type Parameters = ();
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type Randomness = [u8; 32];
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type Output = [u8; 32];
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fn setup<R: Rng>(_: &mut R) -> Result<Self::Parameters, Error> {
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Ok(())
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}
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fn commit(
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_: &Self::Parameters,
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input: &[u8],
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r: &Self::Randomness,
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) -> Result<Self::Output, Error> {
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let mut h = b2s::new();
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h.input(input);
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h.input(r.as_ref());
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let mut result = [0u8; 32];
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result.copy_from_slice(&h.result());
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Ok(result)
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}
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}
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