multipaz/org.multipaz.presentment/TransactionData

TransactionData

class TransactionData<PayloadT : Any>(val type: TransactionType<PayloadT>, val serialized: ByteString, val hashAlgorithms: List<Algorithm>?, val payload: PayloadT)

An object that holds transaction data.

Transaction data is held in two representation: serialized and parsed. Serialized representation is raw sequence of bytes that reflects how transaction data is encoded in the verification protocol (transaction response includes hash of the serialized representation). Parsed representation includes transaction type that describes what kind of transaction this is, the list of hash algorithms that the verifier accepts for this transaction in the order of preference, and transaction payload which is transaction-type-specific data.

Parameters

type

type of the transaction data item

serialized

serialized representation of the transaction data

hashAlgorithms

accepted hash algorithm override list for this transaction data in the order of preference

payload

transaction payload

Constructors

TransactionData

constructor(type: TransactionType<PayloadT>, serialized: ByteString, hashAlgorithms: List<Algorithm>?, payload: PayloadT)

Properties

val hashAlgorithms: List<Algorithm>?

val payload: PayloadT

val serialized: ByteString

val type: TransactionType<PayloadT>

Functions

suspend fun applyCbor(credential: Credential): Map<String, DataItem>?

Applies transaction in the context of ISO ISO/IEC 18013 presentment.

suspend fun applyJson(credential: Credential): JsonElement?

Applies transaction in the context of OpenID4VP presentment.

suspend fun computeHash(algorithm: Algorithm = Algorithm.SHA256): ByteString

Computes hash of the transaction data.

fun convertToCbor(): TransactionData<PayloadT>

Creates equivalent transaction data for use in ISO ISO/IEC 18013 protocols.

suspend fun isApplicable(credential: Credential): Boolean

Determines if this transaction is applicable to the given credential.