63 lines
1.6 KiB
Rust
63 lines
1.6 KiB
Rust
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use crate::proof::verifier::Verifier;
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use ibc_relayer_types::core::ics23_commitment::error::Error as ProofError;
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use ics23::commitment_proof::Proof;
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use ics23::{calculate_existence_root, verify_membership, CommitmentProof, ProofSpec};
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use std::marker::PhantomData;
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#[derive(Clone, Debug)]
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pub struct Ics23MembershipVerifier<K, V> {
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spec: ProofSpec,
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_phantom: PhantomData<(K, V)>,
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}
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impl<K, V> Ics23MembershipVerifier<K, V> {
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pub fn new(spec: ProofSpec) -> Self {
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Self {
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spec,
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_phantom: Default::default(),
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}
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}
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}
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impl<K, V> Verifier for Ics23MembershipVerifier<K, V>
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where
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K: AsRef<[u8]>,
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V: AsRef<[u8]>,
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{
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type Proof = CommitmentProof;
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type Root = Vec<u8>;
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type Key = K;
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type Value = V;
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type Error = ProofError;
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fn verify(
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&self,
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commitment_proof: &Self::Proof,
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key: &Self::Key,
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value: &Self::Value,
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) -> Result<Self::Root, Self::Error> {
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if value.as_ref().is_empty() {
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return Err(ProofError::empty_verified_value());
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}
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let Some(Proof::Exist(existence_proof)) = &commitment_proof.proof else {
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return Err(ProofError::invalid_merkle_proof());
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};
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let root = calculate_existence_root::<ics23::HostFunctionsManager>(existence_proof)
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.map_err(|_| ProofError::invalid_merkle_proof())?;
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if !verify_membership::<ics23::HostFunctionsManager>(
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commitment_proof,
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&self.spec,
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&root,
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key.as_ref(),
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value.as_ref(),
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) {
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return Err(ProofError::verification_failure());
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}
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Ok(root)
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}
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}
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