48 lines
1.2 KiB
Rust
48 lines
1.2 KiB
Rust
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use crate::proof::verifier::Verifier;
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#[derive(Clone, Debug)]
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pub struct MultiVerifier<V, const N: usize> {
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verifiers: [V; N],
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}
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impl<V, const N: usize> MultiVerifier<V, N> {
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pub fn new(verifiers: [V; N]) -> Self {
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assert!(N > 0, "cannot create empty multi-verifiers");
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Self { verifiers }
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}
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}
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impl<V, const N: usize> Verifier for MultiVerifier<V, N>
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where
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V: Verifier,
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V::Value: Clone,
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V::Root: Into<V::Value> + Clone,
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{
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type Proof = [V::Proof; N];
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type Root = V::Root;
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type Key = [V::Key; N];
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type Value = V::Value;
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type Error = V::Error;
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fn verify(
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&self,
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proofs: &Self::Proof,
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keys: &Self::Key,
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value: &Self::Value,
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) -> Result<Self::Root, Self::Error> {
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let mut root = None;
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let mut value = value.clone();
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for (idx, verifier) in self.verifiers.iter().enumerate() {
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let proof = &proofs[idx];
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let key = &keys[N - idx - 1];
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let sub_root = verifier.verify(proof, key, &value)?;
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value = sub_root.clone().into();
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root = Some(sub_root);
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}
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Ok(root.expect("MultiVerifier cannot be instantiated with 0 verifiers"))
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}
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}
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