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Cooket verifies the active signer and Arc Testnet chain immediately before submission. Submitted curve trades retain sender, nonce, target, value, calldata, and a bounded scan position for receipt recovery. If the original hash is missing but the nonce was consumed, recovery scans for a repriced, replaced, or cancelled transaction. If provenance remains unavailable, confirmation stays unknown. Do not duplicate a transaction merely because the interface timed out. Inspect the original hash and nonce on ArcScan, then use the app’s recovery path. API and chart changes can lag a successful receipt because the indexer waits for configured confirmations. That delay does not change the chain result.