From b8706665d21b0e533433308f6e2102b57845fafd Mon Sep 17 00:00:00 2001
From: Joel Balcaen <jobalcaen+github@gmail.com>
Date: Fri, 19 Apr 2024 11:53:45 -0300
Subject: [PATCH] properly handle errors

---
 lambdas/step_function_invoker/src/index.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lambdas/step_function_invoker/src/index.py b/lambdas/step_function_invoker/src/index.py
index fdc1aed..13c6087 100644
--- a/lambdas/step_function_invoker/src/index.py
+++ b/lambdas/step_function_invoker/src/index.py
@@ -2,6 +2,7 @@
 import boto3
 import os
 from aws_lambda_powertools import Logger, Metrics
+from botocore.exceptions import ParamValidationError
 
 logger = Logger()
 metrics = Metrics()
@@ -17,7 +18,7 @@ def lambda_handler(event, context):
     try:
         state_machine_execution_result = step_functions_client.start_execution(
             stateMachineArn=STATE_MACHINE_ARN,
-            input=json.dumps(event),
+            input=event,
         )
 
         return {
@@ -25,6 +26,12 @@ def lambda_handler(event, context):
             "body": json.dumps(state_machine_execution_result),
         }
     
+    except ParamValidationError as e:
+        return {
+            "statusCode": 400,
+            "body": json.dumps({"error": "Parameter validation error", "details": str(e)}),
+        }
+    
     except Exception as e:
         return {
             "statusCode": 400,