JavaScript configures a Substrate node call to submit a fulfill extrinsic with random entropy

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• C·793ef6d6e1 · This JavaScript file configures a single Substrate node interaction via the _STD_.chains.substrate.fulfill API. It generates a random hex entropy string and attempts to submit a 'fulfill' extrinsic to a specified pallet at a configured node URL. The code includes placeholders for the node address and call index, requiring manual replacement. Upon success or failure, it logs the operation hash or error to the console. No execution proof is provided; the code is static source only.