The SecurePaymentConfirmationRequest dictionary describes input to the Payment Request API when used to authenticate a user during an e-commerce transaction using SPC with Payment Request API.
An instance of this dictionary must be passed into the PaymentRequest() constructor as the value of the data field corresponding to a supportedMethods value of "secure-payment-confirmation".
challenge
An ArrayBuffer, TypedArray, or DataView provided by the relying party's server and used as a cryptographic challenge. This value will be signed by the authenticator and the signature will be sent back as part of AuthenticatorAttestationResponse.attestationObject. This helps prevent replay attacks.
credentialIds
A list of ArrayBuffer, TypedArray, or DataView. These Credential IDs represent Web Authentication credentials that have been registered with the relying party for authenticating during a payment with the associated instrument.
extensions Optional
Any WebAuthn extensions that should be used for the passed credential(s). The caller does not need to specify the payment extension; this is added automatically.
instrument
The description of the instrument name and icon to display during registration and to be signed along with the transaction details. This is an object with the following properties:
displayName
A string containing the payment instrument's name, which will be displayed to the user.
icon
A string containing the URL of the payment instrument's icon.
iconMustBeShown Optional
A boolean value indicating whether the icon must be successfully fetched and shown for the request to succeed. Defaults to true.
locale Optional
An optional list of well-formed RFC 5646: Tags for Identifying Languages (also known as BCP 47) language tags, in descending order of priority, that identify the local preferences of the website. That is, this represents a language priority list RFC 4647: Matching of Language Tags, which the user agent can use to perform language negotiation and locale-affected formatting with the caller.
Note: The locale is distinct from language or direction metadata associated with specific input members, in that it represents the caller's requested localized experience rather than assertion about a specific string value. See SPC internationalization Considerations for more discussion.
payeeName Optional
A string that serves as the display name of the payee that this SPC call is for (e.g., the merchant). Optional, may be provided alongside or instead of payeeOrigin.
payeeOrigin Optional
A string that is the origin of the payee that this SPC call is for (e.g., the merchant). Optional, may be provided alongside or instead of payeeName.
rpId
A string that specifies the relying party's identifier (for example "login.example.org").
showOptOut Optional
A boolean indicating whether the user should be given a chance to opt-out during the transaction dialog UX. Defaults to false.
timeout Optional
The number of milliseconds before the request to sign the transaction details times out. At most 1 hour.
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