使用安全支付确认

const publicKey = {
  challenge: Uint8Array.from(randomStringFromServer, (c) => c.charCodeAt(0)),
  rp: {
    name: "Fancy Bank",
  },
  user: {
    // Assuming that userId is ASCII-only
    id: Uint8Array.from(userId, (c) => c.charCodeAt(0)),
    name: "jane.doe@example.org",
    displayName: "Jane Doe",
  },
  pubKeyCredParams: [
    {
      type: "public-key",
      alg: -7, // "ES256"
    },
    {
      type: "public-key",
      alg: -257, // "RS256"
    },
  ],
  authenticatorSelection: {
    userVerification: "required",
    residentKey: "required",
    authenticatorAttachment: "platform",
  },
  timeout: 60000, // 1 minute
  extensions: {
    payment: {
      isPayment: true,
    },
  },
};
navigator.credentials
  .create({ publicKey })
  .then((newCredentialInfo) => {
    // Send new credential info to server for verification and registration.
  })
  .catch((err) => {
    // No acceptable authenticator or user refused consent. Handle appropriately.
  });

<!-- Assume parent origin is merchant.com -->
<!-- Inside this cross-origin iframe, script would be allowed to create a SPC credential for example.org -->
<iframe src="https://example.org" allow="payment"></iframe>

const request = new PaymentRequest(
  [
    {
      supportedMethods: "secure-payment-confirmation",
      data: {
        // List of credential IDs obtained from the Account Provider.
        credentialIds,
        // The challenge is also obtained from the Account Provider.
        challenge: new Uint8Array(randomStringFromServer, (c) =>
          c.charCodeAt(0),
        ),
        instrument: {
          displayName: "Fancy Card ****1234",
          icon: "https://fancybank.com/card-art.png",
        },
        payeeOrigin: "https://merchant.com",
        timeout: 60000, // 1 minute
      },
    },
  ],
  {
    total: {
      label: "Total",
      amount: {
        currency: "USD",
        value: "5.00",
      },
    },
  },
);
try {
  // NOTE: canMakePayment() checks only public information for whether the SPC
  // call is valid. To preserve user privacy, it does not check whether any
  // passed credentials match the current device.
  const canMakePayment = await request.canMakePayment();
  if (!canMakePayment) {
    throw new Error("Cannot make payment");
  }
  const response = await request.show();
  await response.complete("success");
  // response.details is a PublicKeyCredential, with a clientDataJSON that
  // contains the transaction data for verification by the issuing bank.
  // send response.details to the issuing bank for verification
} catch (err) {
  // SPC cannot be used; merchant should fallback to traditional flows
}

async function spcSupport() {
  const support = await PaymentRequest.securePaymentConfirmationAvailability();
  if (support === "available") {
    // Commence SPC payment flow
  } else {
    // Fallback to traditional flows
  }
}