fix: rotate RPC on GS013 to escape stale node immediately

GS013 errors are caused by RPC nodes returning stale state that makes
the Safe simulation fail.  Previously the retry path just waited through
exponential backoff (up to 63s) on the same stale node.  Now we trigger
RPC rotation immediately so the next attempt hits a fresh node, reducing
GS013 recovery from ~30-60s to ~2-5s.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: dvilelaf

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "iwa"
-version = "0.7.7"
+version = "0.7.8"
 description = "A secure, modular, and plugin-based framework for crypto agents and ops"
 readme = "README.md"
 requires-python = ">=3.12,<4.0"

src/iwa/core/services/safe_executor.py

@@ -292,15 +292,19 @@ def _handle_execution_failure(
             )
             return safe_tx, False, is_fee_error
 
-        # GS013 = inner call reverted while safeTxGas=0 and gasPrice=0.
-        # This can be transient (RPC returning stale chain state, marketplace
-        # contract in a temporary state).  Allow retry with backoff.
+        # GS013 = RPC provider returning stale state that makes the Safe
+        # simulation fail.  The diagnosis eth.call always succeeds because
+        # with_retry() may already use a different node.  Fix: rotate RPC
+        # immediately so the next _execute_attempt hits a fresh node instead
+        # of waiting through exponential backoff against the same stale node.
         if classification["is_gs013_inner_revert"]:
             SAFE_TX_STATS["gs013_inner_revert_retries"] += 1
+            SAFE_TX_STATS["rpc_rotations"] += 1
             self._diagnose_inner_revert(safe_tx, operation_name)
+            self.chain_interface._handle_rpc_error(error)
             logger.warning(
                 f"[{operation_name}] GS013 inner call revert (attempt {attempt + 1}), "
-                f"retrying: {safe_error}{reason_suffix}"
+                f"rotating RPC and retrying: {safe_error}{reason_suffix}"
             )
             return safe_tx, True, is_fee_error