transactionDataHashes
@SerialName(value = "transaction_data_hashes")
OID4VP: A non-empty array of strings where each element is a base64url-encoded hash. Each of these hashes is calculated using a hash function over the string received in the transaction_data request parameter (base64url decoding is not performed before hashing). Each hash value ensures the integrity of, and maps to, the respective transaction data object. If transaction_data_hashes_alg was specified in the request, the hash function MUST be one of its values. If transaction_data_hashes_alg was not specified in the request, the hash function MUST be sha-256.