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Make the attached-chain mode work against public RPCs #114

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Merged
ClaudiuSchuster merged 1 commit into from
Sep 18, 2026
Merged

Make the attached-chain mode work against public RPCs #114

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19 changes: 10 additions & 9 deletions scripts/test-settlement-anvil.py
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Original file line number Diff line number Diff line change
Expand Up @@ -90,12 +90,11 @@ def setUpClass(cls) -> None:
raise
global ATTACHED
if ATTACH:
try:
urllib.request.urlopen(urllib.request.Request(
RPC, data=b'{"jsonrpc":"2.0","id":1,"method":"eth_chainId","params":[]}',
headers={"Content-Type": "application/json"}), timeout=5)
except Exception as error:
raise unittest.SkipTest(f"attached chain not reachable: {error}")
# probe through cast: public RPCs may reject the python client outright
probe = subprocess.run(["cast", "chain-id", "--rpc-url", RPC],
capture_output=True, text=True, timeout=30)
if probe.returncode != 0:
raise unittest.SkipTest(f"attached chain not reachable: {probe.stderr.strip()[:120]}")
ATTACHED = False # this run must never stop a chain it did not start
else:
cls.ANVIL = subprocess.Popen(["anvil", "--port", str(LOCAL_PORT), "--silent"],
Expand Down Expand Up @@ -145,9 +144,11 @@ def setUp(self) -> None:
if deploy.returncode != 0 or receipt.get("status") != "0x1" or not address:
self.fail(f"deployment failed on local chain: {deploy.stderr[:160]}")
self.contract = address
# The chain clock is global and keeps the highest mined timestamp, so
# every scenario first returns it to the present, below all deadlines.
self._jump_to(int(time.time()))
# The local chain clock is global and keeps the highest mined
# timestamp, so every scenario first returns it to the present, below
# all deadlines. Attached chains have no time control at all.
if not ATTACH:
self._jump_to(int(time.time()))

@classmethod
def _shutdown(cls) -> None:
Expand Down
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