1 files changed, 13 insertions, 7 deletions
diff --git a/poc/spike3_node.py b/poc/spike3_node.py
index c0ddde0..562239f 100644
--- a/poc/spike3_node.py
+++ b/poc/spike3_node.py
@@ -12,17 +12,23 @@ Sequence:
   8. Simulate token refresh
 """
 
-import asyncio, httpx, base64, json, os, time
+import asyncio
+import base64
+import json
+import time
 from pathlib import Path
+
+import httpx
+import jwt
+from cryptography.hazmat.primitives import serialization
 from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PrivateKey
 from cryptography.hazmat.primitives.asymmetric.x25519 import X25519PrivateKey
-from cryptography.hazmat.primitives import serialization
-import jwt
 
 HUB_URL    = "http://meshbay.org"
 STATE_FILE = Path("node_state.json")   # persists keys and tokens between runs
 
-PASS = "✓"; FAIL = "✗"
+PASS = "✓"
+FAIL = "✗"
 
 # ── Key helpers ───────────────────────────────────────────────────────────────
 
@@ -52,7 +58,7 @@ def _load_or_generate_keys(state: dict) -> tuple:
         sk_x  = X25519PrivateKey.generate()
         state["sk_ed25519_b64"] = _sk_to_b64(sk_ed)
         state["sk_x25519_b64"]  = _sk_to_b64(sk_x)
-        print(f"  Generated new keypair")
+        print("  Generated new keypair")
     return sk_ed, sk_x
 
 # ── Main ──────────────────────────────────────────────────────────────────────
@@ -101,7 +107,7 @@ async def main():
             state["user_id"] = r.json()["user_id"]
             print(f"  {PASS} Registered — user_id={state['user_id'][:8]}...")
         elif r.status_code == 409:
-            print(f"  Already registered (409) — continuing with existing account")
+            print("  Already registered (409) — continuing with existing account")
         else:
             raise RuntimeError(f"Register failed: {r.status_code} {r.text}")
 
@@ -149,7 +155,7 @@ async def main():
         node_id = r.json()["node_id"]
         state["node_id"] = node_id
         print(f"  {PASS} Node announced — node_id={node_id[:8]}...")
-        print(f"  endpoint_hint : None (STUN/UPnP discovery in Spike 4)")
+        print("  endpoint_hint : None (STUN/UPnP discovery in Spike 4)")
 
         # ── Step 7: Retrieve node record ──────────────────────────────────────
         print("\n[ 7 ] Retrieve node record from hub")