fix(payments): align boto3 region with AWS_REGION from .env

01-features/08-agents-that-transact/00-getting-started/02-deploy-to-agentcore-runtime/deploy_payment_agent.py

@@ -38,18 +38,18 @@
 from dotenv import load_dotenv
 
 sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
-from utils import load_tutorial_env, print_summary, update_env_file
+from utils import load_tutorial_env, print_summary, resolve_region, update_env_file
 
 ENV_FILE = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), ".env")
 load_dotenv(ENV_FILE, override=True)
 
 HERE = os.path.dirname(os.path.abspath(__file__))
 
 # ── Verify AWS credentials ────────────────────────────────────────────────────
+REGION = resolve_region()
 session = boto3.Session()
 identity = session.client("sts").get_caller_identity()
 account_id = identity["Account"]
-REGION = session.region_name or os.environ.get("AWS_REGION", "us-west-2")
 print(f"Authenticated as: {identity['Arn']}")
 print(f"Account: {account_id}")
 print(f"Region: {REGION}")

01-features/08-agents-that-transact/00-getting-started/04-agent-with-coinbase-bazaar-via-gateway/bazaar_gateway_agent.py

@@ -45,17 +45,18 @@
 from dotenv import load_dotenv
 
 sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
-from utils import load_tutorial_env, print_summary
+from utils import load_tutorial_env, print_summary, resolve_region
 
 ENV_FILE = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), ".env")
 load_dotenv(ENV_FILE, override=True)
 
 # ── Verify AWS credentials ────────────────────────────────────────────────────
+REGION = resolve_region()
 session = boto3.Session()
 identity = session.client("sts").get_caller_identity()
 print(f"Authenticated as: {identity['Arn']}")
 print(f"Account: {identity['Account']}")
-print(f"Region: {session.region_name}")
+print(f"Region: {REGION}")
 
 # ── Step 1: Gateway Setup (manual) ───────────────────────────────────────────
 print("""

01-features/08-agents-that-transact/00-getting-started/utils.py

@@ -35,6 +35,28 @@
 # ═════════════════════════════════════════════════════════════════
 
 
+def resolve_region(default="us-west-2"):
+    """Resolve the AWS region the tutorials should use, and align boto3 with it.
+
+    boto3 reads `AWS_DEFAULT_REGION` from the environment but ignores
+    `AWS_REGION` (the env var name used by the AWS SDK for JavaScript and by
+    the tutorial `.env` files). Without this helper, a `.env` that sets
+    `AWS_REGION=us-west-2` is silently ignored and `boto3.Session()` falls
+    back to whatever `~/.aws/config` says, which is often a different region.
+
+    Promote `AWS_REGION` to `AWS_DEFAULT_REGION` if the operator hasn't set
+    `AWS_DEFAULT_REGION` explicitly, then return the resolved value.
+    """
+    if "AWS_REGION" in os.environ and "AWS_DEFAULT_REGION" not in os.environ:
+        os.environ["AWS_DEFAULT_REGION"] = os.environ["AWS_REGION"]
+    return (
+        os.environ.get("AWS_DEFAULT_REGION")
+        or os.environ.get("AWS_REGION")
+        or boto3.Session().region_name
+        or default
+    )
+
+
 def load_payment_env(env_file=".env"):
     """Load .env file and return config dict."""
     load_dotenv(env_file, override=True)
@@ -442,8 +464,7 @@ def setup_cognito_user_pool(pool_name="AgentCorePaymentsPool"):
 
     Returns dict with pool_id, client_id, client_secret, token_url.
     """
-    session = boto3.Session()
-    region = session.region_name
+    region = resolve_region()
     cognito = boto3.client("cognito-idp", region_name=region)
 
     pool_resp = cognito.create_user_pool(