Verify inclusion proof should not be fallible (#5787)

* Verify inclusion proof should not be fallible

* Add blob sidecar inclusion test (#33)

* Add blob sidecar inclusion test.

* Fix lint

beacon_node/beacon_chain/src/blob_verification.rs

@@ -10,7 +10,6 @@ use crate::block_verification::{
 use crate::kzg_utils::{validate_blob, validate_blobs};
 use crate::{metrics, BeaconChainError};
 use kzg::{Error as KzgError, Kzg, KzgCommitment};
-use merkle_proof::MerkleTreeError;
 use slog::debug;
 use ssz_derive::{Decode, Encode};
 use ssz_types::VariableList;
@@ -128,13 +127,6 @@ pub enum GossipBlobError<E: EthSpec> {
     /// The blob sidecar is invalid and the peer is faulty.
     KzgError(kzg::Error),
 
-    /// The kzg commitment inclusion proof failed.
-    ///
-    /// ## Peer scoring
-    ///
-    /// The blob sidecar is invalid
-    InclusionProof(MerkleTreeError),
-
     /// The pubkey cache timed out.
     ///
     /// ## Peer scoring
@@ -459,10 +451,7 @@ pub fn validate_blob_sidecar_for_gossip<T: BeaconChainTypes>(
 
     // Verify the inclusion proof in the sidecar
     let _timer = metrics::start_timer(&metrics::BLOB_SIDECAR_INCLUSION_PROOF_VERIFICATION);
-    if !blob_sidecar
-        .verify_blob_sidecar_inclusion_proof()
-        .map_err(GossipBlobError::InclusionProof)?
-    {
+    if !blob_sidecar.verify_blob_sidecar_inclusion_proof() {
         return Err(GossipBlobError::InvalidInclusionProof);
     }
     drop(_timer);

beacon_node/network/src/network_beacon_processor/gossip_methods.rs

@@ -690,7 +690,6 @@ impl<T: BeaconChainTypes> NetworkBeaconProcessor<T> {
                     | GossipBlobError::InvalidSubnet { .. }
                     | GossipBlobError::InvalidInclusionProof
                     | GossipBlobError::KzgError(_)
-                    | GossipBlobError::InclusionProof(_)
                     | GossipBlobError::NotFinalizedDescendant { .. } => {
                         warn!(
                             self.log,

beacon_node/network/src/sync/network_context/requests.rs

@@ -120,7 +120,7 @@ impl<E: EthSpec> ActiveBlobsByRootRequest<E> {
         if self.request.block_root != block_root {
             return Err(LookupVerifyError::UnrequestedBlockRoot(block_root));
         }
-        if !blob.verify_blob_sidecar_inclusion_proof().unwrap_or(false) {
+        if !blob.verify_blob_sidecar_inclusion_proof() {
             return Err(LookupVerifyError::InvalidInclusionProof);
         }
         if !self.request.indices.contains(&blob.index) {