fix: fixed return typed

Signed-off-by: Logan Nguyen <logan.nguyen@swirldslabs.com>

Author: quiet-node

packages/relay/src/lib/debug.ts

@@ -429,7 +429,7 @@ export class DebugImpl implements Debug {
     transactionHash: string,
     tracerConfig: ICallTracerConfig,
     requestDetails: RequestDetails,
-  ): Promise<CallTracerResult> {
+  ): Promise<CallTracerResult | null> {
     try {
       const [actionsResponse, transactionsResponse] = await Promise.all([
         this.mirrorNodeClient.getContractsResultsActions(transactionHash, requestDetails),
@@ -445,7 +445,7 @@ export class DebugImpl implements Debug {
       }
 
       // return empty array if no actions
-      if (actionsResponse.length === 0) return [];
+      if (actionsResponse.length === 0) return null;
 
       const { call_type: type } = actionsResponse[0];
       const formattedActions = await this.formatActionsResult(actionsResponse, requestDetails);

packages/relay/src/lib/types/debug.ts

@@ -73,5 +73,5 @@ export interface TraceBlockByNumberTxResult {
   /**
    * The result of the trace, which can be either a {@link CallTracerResult} or an {@link EntityTraceStateMap}.
    */
-  result: CallTracerResult | EntityTraceStateMap;
+  result: CallTracerResult | EntityTraceStateMap | null;
 }

packages/relay/tests/lib/debug.spec.ts

@@ -433,7 +433,7 @@ describe('Debug API Test Suite', async function () {
             requestDetails,
           );
 
-          expect(result).to.be.empty;
+          expect(result).to.be.null;
         });
       });