check clientid and use prefix of counterparty

ibc-eureka-core/ics04-channel/src/handler/acknowledgement.rs

@@ -6,6 +6,7 @@ use ibc_eureka_core_channel_types::events::AcknowledgePacket;
 use ibc_eureka_core_channel_types::msgs::MsgAcknowledgement;
 use ibc_eureka_core_client::context::prelude::*;
 use ibc_eureka_core_handler_types::events::{IbcEvent, MessageEvent};
+use ibc_eureka_core_host::types::identifiers::ClientId;
 use ibc_eureka_core_host::types::path::{
     AckPathV2 as AckPath, ClientConsensusStatePath, CommitmentPathV2 as CommitmentPath, Path,
 };
@@ -134,9 +135,20 @@ where
     {
         // TODO(rano): avoid a vs b confusion
         let id_target_client_on_source = channel_target_client_on_source.as_ref();
+        let id_source_client_on_target: &ClientId = channel_source_client_on_target.as_ref();
 
         let client_val_ctx_a = ctx_a.get_client_validation_context();
 
+        let (stored_id_source_client_on_target, target_prefix) =
+            client_val_ctx_a.counterparty_client(id_target_client_on_source)?;
+
+        if &stored_id_source_client_on_target != id_source_client_on_target {
+            return Err(ChannelError::MismatchCounterparty {
+                expected: stored_id_source_client_on_target.clone(),
+                actual: id_source_client_on_target.clone(),
+            });
+        }
+
         let target_client_on_source = client_val_ctx_a.client_state(id_target_client_on_source)?;
 
         target_client_on_source

ibc-eureka-core/ics04-channel/src/handler/recv_packet.rs

@@ -6,6 +6,7 @@ use ibc_eureka_core_channel_types::events::{ReceivePacket, WriteAcknowledgement}
 use ibc_eureka_core_channel_types::msgs::MsgRecvPacket;
 use ibc_eureka_core_client::context::prelude::*;
 use ibc_eureka_core_handler_types::events::{IbcEvent, MessageEvent};
+use ibc_eureka_core_host::types::identifiers::ClientId;
 use ibc_eureka_core_host::types::path::{
     AckPathV2 as AckPath, ClientConsensusStatePath, CommitmentPathV2 as CommitmentPath, Path,
     ReceiptPathV2 as ReceiptPath, SeqRecvPathV2 as SeqRecvPath,
@@ -140,7 +141,20 @@ where
     // Verify proofs
     {
         let id_source_client_on_target = channel_source_client_on_target.as_ref();
+        let id_target_client_on_source: &ClientId = channel_target_client_on_source.as_ref();
+
         let client_val_ctx_b = ctx_b.get_client_validation_context();
+
+        let (stored_id_target_client_on_source, source_prefix) =
+            client_val_ctx_b.counterparty_client(id_source_client_on_target)?;
+
+        if &stored_id_target_client_on_source != id_target_client_on_source {
+            return Err(ChannelError::MismatchCounterparty {
+                expected: stored_id_target_client_on_source.clone(),
+                actual: id_target_client_on_source.clone(),
+            });
+        }
+
         let source_client_on_target = client_val_ctx_b.client_state(id_source_client_on_target)?;
 
         source_client_on_target

ibc-eureka-core/ics04-channel/src/handler/send_packet.rs

@@ -4,6 +4,7 @@ use ibc_eureka_core_channel_types::events::SendPacket;
 use ibc_eureka_core_channel_types::packet::Packet;
 use ibc_eureka_core_client::context::prelude::*;
 use ibc_eureka_core_handler_types::events::{IbcEvent, MessageEvent};
+use ibc_eureka_core_host::types::identifiers::ClientId;
 use ibc_eureka_core_host::types::path::{
     ClientConsensusStatePath, CommitmentPathV2 as CommitmentPath, SeqSendPathV2 as SeqSendPath,
 };
@@ -36,9 +37,20 @@ pub fn send_packet_validate(
     let channel_source_client_on_target = &packet.header.source_client_on_target;
     let seq_on_a = &packet.header.seq_on_a;
 
+    let client_val_ctx_a = ctx_a.get_client_validation_context();
+
     let id_target_client_on_source = channel_target_client_on_source.as_ref();
+    let id_source_client_on_target: &ClientId = channel_source_client_on_target.as_ref();
 
-    let client_val_ctx_a = ctx_a.get_client_validation_context();
+    let (stored_id_source_client_on_target, _) =
+        client_val_ctx_a.counterparty_client(id_target_client_on_source)?;
+
+    if &stored_id_source_client_on_target != id_source_client_on_target {
+        return Err(ChannelError::MismatchCounterparty {
+            expected: stored_id_source_client_on_target.clone(),
+            actual: id_source_client_on_target.clone(),
+        });
+    }
 
     let target_client_on_source = client_val_ctx_a.client_state(id_target_client_on_source)?;
 

ibc-eureka-core/ics04-channel/src/handler/timeout.rs

@@ -4,6 +4,7 @@ use ibc_eureka_core_channel_types::events::TimeoutPacket;
 use ibc_eureka_core_channel_types::msgs::MsgTimeout;
 use ibc_eureka_core_client::context::prelude::*;
 use ibc_eureka_core_handler_types::events::{IbcEvent, MessageEvent};
+use ibc_eureka_core_host::types::identifiers::ClientId;
 use ibc_eureka_core_host::types::path::{
     ClientConsensusStatePath, CommitmentPathV2 as CommitmentPath, Path,
     ReceiptPathV2 as ReceiptPath,
@@ -125,7 +126,20 @@ where
     // Verify proofs
     {
         let id_target_client_on_source = channel_target_client_on_source.as_ref();
+        let id_source_client_on_target: &ClientId = channel_source_client_on_target.as_ref();
+
         let client_val_ctx_a = ctx_a.get_client_validation_context();
+
+        let (stored_id_source_client_on_target, target_prefix) =
+            client_val_ctx_a.counterparty_client(id_target_client_on_source)?;
+
+        if &stored_id_source_client_on_target != id_source_client_on_target {
+            return Err(ChannelError::MismatchCounterparty {
+                expected: stored_id_source_client_on_target.clone(),
+                actual: id_source_client_on_target.clone(),
+            });
+        }
+
         let target_client_on_source = client_val_ctx_a.client_state(id_target_client_on_source)?;
 
         target_client_on_source