如何在Apple Pay PKPayment对象数据中获取ephemeralPublicKey而不是wrappedKey和EC_v1而不是RSA_v1

import Foundation
import PassKit

func getEphemeralPublicKey(from paymentToken: PKPaymentToken) -> String? {
    guard let paymentData = paymentToken.paymentData.base64EncodedString(),
          let decodedData = Data(base64Encoded: paymentData),
          let json = try? JSONSerialization.jsonObject(with: decodedData, options: []) as? [String: Any],
          let ephemeralPublicKey = json["ephemeralPublicKey"] as? String else {
        return nil
    }
    return ephemeralPublicKey
}

// 使用示例
let paymentToken = // 获取PKPaymentToken对象
if let ephemeralPublicKey = getEphemeralPublicKey(from: paymentToken) {
    print("ephemeralPublicKey: \(ephemeralPublicKey)")
} else {
    print("无法获取ephemeralPublicKey")
}