4.1 Single Payments

2.1.1 “paymentInitiationRequest”

This API creates a payment resource with all data relevant for the corresponding payment product; each payment product is managed by a dedicated endpoint. PSD2-Orchestrator publishes the payment-product endpoint if at least one ASPSP support it.

Input parameters

Attribute	Description
psu-id	The ID of the PSU in the ASPSP client interface. Mandatory if “psu-corporate-id” is valorized
psu-id-type	Type of the PSU-ID, needed in scenarios where PSUs have several PSU-IDs as access possibility.
psu-corporate-id	Identification of a Corporate, only used in a corporate context.
consent-id	This data element may be contained, if the payment initiation transaction is part of a session, i.e. combined AIS/PIS service. This then contains the “consentId” of the related AIS consent, which was performed prior to this payment initiation.
tpp-redirect-preferred	Only “true” or “false” values are accepted. If it equals “true”, the TPP prefers a redirect over an embedded SCA approach. If it equals “false”, the TPP prefers not to be redirected for SCA. The ASPSP will then choose between the Embedded or the Decoupled SCA approach, depending on the choice of the SCA procedure by the TPP/PSU. If the parameter is not used, the ASPSP will choose the SCA approach to be applied depending on the SCA method chosen by the TPP/PSU.
tpp-nok-redirect-uri	If this URI is contained, the TPP is asking to redirect the transaction flow to this address instead of the TPP-Redirect-URI in case of a negative result of the redirect SCA method. This might be ignored by the ASPSP.
tpp-signature-certificate	This is a X509 certificate that the TPP uses for signing the request, in base64 encoding. This certificate is in PEM format without the "-----BEGIN CERTIFICATE-----" and "-----END CERTIFICATE-----". Must be contained if a signature is contained, see above.
signature	This is a X509 certificate that the TPP uses for signing the request, in base64 encoding. This certificate is in PEM format without the "-----BEGIN CERTIFICATE-----" and "-----END CERTIFICATE-----". Must be contained if a signature is contained, see above.
digest	Is contained if and only if the “Signature” element is contained in the header of the request. The “digest” Header contains a Hash of the message body. The only hash algorithms that may be used to calculate the digest within the context of this specification are SHA-256 and SHA-512.
tpp-role	The third party payment service provider can have one or more of the following roles: AISP (Account Information Service Provider) PISP (Payment Initiation Service Provider) PIISP (Payment Instrument Issuing Service Provider)
aspsp-code	The account servicing payment service provider code
aspsp-product-code	The account servicing payment service provider product code.
payment-product	The addressed payment product endpoint. The value list of products supported is: - sepa-credit-transfers - instant-sepa-credit-transfers - target-2-payments - cross-border-credit-transfers
debtorAccount	The account identification which can be used on payload-level to address specific accounts.
instructedAmount	Transaction amount to be checked within the funds check mechanism.
creditorAccount	The account identification which can be used on payload-level to address specific accounts.
transactionType	Represents the payment method used Possible values are: - unattended_terminal_transaction (e.g. transportation or parking) - cless_transaction - remote_transaction

Output parameters

Attribute	Description
result Code	Result of the payment initiation request.
Error Management	Description of the type of error obtained in the event that the outcome is negative.
transactionStatus	Accepted values: - ACCP - ACSC - ACSP - ACTC - ACWC - ACWP - RCVD - PDNG - RJCT
paymentId	The UUID of the generated payment initiation resource.
scaMethods	This data element might be contained, if SCA is required and if the PSU has a choice between different authentication methods. If this data element is contained, then there is also an hyperlink of type “selectAuthenticationMethods” contained in the response body. These methods shall be presented towards the PSU for selection by the TPP.
chosenScaMethod	This data element is only contained in the response if the APSPS has chosen the Embedded SCA Approach, if the PSU is already identified.