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Allow zero FRI reductions (#283)

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In this case we're basically sending the witness. As @wborgeaud mentioned it might make sense for small circuits.
This commit is contained in:
Daniel Lubarov 2021-10-04 14:11:53 -07:00 committed by GitHub
parent 898cac1709
commit 73f9a0be6b
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3 changed files with 1 additions and 9 deletions
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4
src/fri/recursive_verifier.rs
View File

@ -121,10 +121,6 @@ impl<F: RichField + Extendable<D>, const D: usize> CircuitBuilder<F, D> {
proof.query_round_proofs.len(),
"Number of query rounds does not match config."
);
debug_assert!(
!common_data.fri_params.reduction_arity_bits.is_empty(),
"Number of reductions should be non-zero."
);
let precomputed_reduced_evals = with_context!(
self,

2
src/fri/reduction_strategies.rs
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@ -26,7 +26,7 @@ impl FriReductionStrategy {
match self {
&FriReductionStrategy::ConstantArityBits(arity_bits, final_poly_bits) => {
let mut result = Vec::new();
while result.is_empty() || degree_bits > final_poly_bits {
while degree_bits > final_poly_bits {
result.push(arity_bits);
assert!(degree_bits >= arity_bits);
degree_bits -= arity_bits;

4
src/fri/verifier.rs
View File

@ -80,10 +80,6 @@ pub(crate) fn verify_fri_proof<F: RichField + Extendable<D>, const D: usize>(
config.fri_config.num_query_rounds == proof.query_round_proofs.len(),
"Number of query rounds does not match config."
);
ensure!(
!common_data.fri_params.reduction_arity_bits.is_empty(),
"Number of reductions should be non-zero."
);
let precomputed_reduced_evals =
PrecomputedReducedEvals::from_os_and_alpha(os, challenges.fri_alpha);