fix: error messages

crates/topos-sequencer-subnet-client/src/lib.rs

@@ -172,8 +172,8 @@ impl SubnetClientListener {
             Err(Error::EventDecodingError(e)) => {
                 // FIXME: Happens in block before subnet contract is deployed, seems like bug in ethers
                 error!(
-                    "Error decoding events from block {}: {e} \nTopos smart contracts may not be \
-                     deployed?",
+                    "Error decoding events from block {}: {e}. Topos smart contracts may not be \
+                     deployed before the parsed block?",
                     block_number
                 );
                 Vec::new()
@@ -221,8 +221,8 @@ impl SubnetClientListener {
                 Err(Error::EventDecodingError(e)) => {
                     // FIXME: Happens in block before subnet contract is deployed, seems like bug in ethers
                     error!(
-                        "Error decoding events from block {}: {e} \nTopos smart contracts may not \
-                         be deployed?",
+                        "Error decoding events from block {}: {e}. Topos smart contracts may not \
+                         be deployed before the parsed block?",
                         block_number
                     );
                     Vec::new()

crates/topos-sequencer-subnet-runtime/tests/subnet_contract.rs

@@ -347,6 +347,12 @@ async fn deploy_test_token(
         .event::<abi::ierc20_messaging::TokenDeployedFilter>()
         .from_block(0);
     let events = events.query().await?;
+    if events.is_empty() {
+        panic!(
+            "Missing TokenDeployed event. Token contract is not deployed to test subnet. Could \
+             not execute test"
+        );
+    }
     let token_address = events[0].token_address;
     info!("Token contract deployed to {}", token_address.to_string());
 
@@ -432,7 +438,14 @@ async fn context_running_subnet_node(
     let subnet_node_handle = match spawn_subnet_node(port, block_time) {
         Ok(subnet_node_handle) => subnet_node_handle,
         Err(e) => {
-            panic!("Failed to start the subnet node as part of test context: {e}");
+            if e.kind() == std::io::ErrorKind::NotFound {
+                panic!(
+                    "Could not find Anvil binary. Please install and add to path Foundy tools \
+                     including Anvil"
+                );
+            } else {
+                panic!("Failed to start the Anvil subnet node as part of test context: {e}");
+            }
         }
     };
     // Wait a bit for anvil subprocess to spin itself up