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10 changes: 5 additions & 5 deletions willow/src/zk/linear_ip.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,7 @@ pub struct LinearInnerProductParameters {
F: RistrettoPoint,
F_: RistrettoPoint,
G: Vec<RistrettoPoint>,
seed: Vec<u8>,
}

pub fn inner_product(a: &[Scalar], b: &[Scalar]) -> Scalar {
Expand All @@ -59,6 +60,7 @@ fn common_setup(length: usize, parameter_seed: &[u8]) -> LinearInnerProductParam
)
})
.collect(),
seed: parameter_seed.to_vec(),
}
}

Expand All @@ -67,11 +69,9 @@ fn append_params_to_transcript(
params: &LinearInnerProductParameters,
) {
transcript.append_u64(b"n", params.n as u64);
for G_i in &params.G {
transcript.append_message(b"G_i", G_i.compress().as_bytes());
}
transcript.append_message(b"F", params.F.compress().as_bytes());
transcript.append_message(b"F_", params.F_.compress().as_bytes());
// We append the seed not the resulting params themselves because appending that many params
// more than doubles the run time of both prove and verify.
transcript.append_message(b"seed", &params.seed);
}

fn validate_and_append_point(
Expand Down