What Oracle Data Is Critical for the Settlement of a European-Style Cash-Settled Option Contract?

For a European-style cash-settled option, the critical oracle data is the final, agreed-upon price of the underlying asset at the exact expiration time. Since the option is cash-settled, the smart contract needs this definitive price to calculate the intrinsic value.

This value determines the final cash payment transferred between the option writer and holder, which is automatically executed by the contract.