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Presently, there are two possible use cases in the current existing technical arrangements of SFTP. The below use cases are examples of how to replace the TDA-based exchange using the new DAS Rest API.

Use Case 1 - Document Registration by OFF to WIPO DAS with upload of the document content

Existing flow operated with SFTP	New flow using DAS Rest API

OFF uploads a request zip package file to sftp.wipo.int for registration	POST https://{wipo-hostname}/am/oauth2/access_token	OFF uses the OFF private key to generate the JWT client assertion (see more details) to request a valid access-token to WIPO DAS
	POST https://{wipo-hostname}/requests/url-uploads	OFF sends a request to get a URL to upload the priority document content
	PUT {url-upload}	OFF uses the url-upload to upload the actual file content
	GET https://{wipo-hostname}/requests/url-uploads	OFF checks the readiness of the uploaded file for registration. This is because WIPO DAS performs a PDDP package file validation.
	POST https://{wipo-hostname}/requests/registrations	OFF sends the document registration request after receiving a successful status of the previous file upload, receives an ackId and the request status
OFF downloads a response file from sftp.wipo.int to check registration result

Use Case 2 - Document Retrieval to WIPO DAS by OSF

Existing flow operated with SFTP	New flow using DAS Rest API with notifications of document availability
OSF uploads a request zip package file to sftp.wipo.int for s document retrieval	POST https://{wipo-hostname}/am/oauth2/access_token	OSF uses the OSF private key to generate the JWT client assertion (see more details) to request a valid access-token to WIPO DAS
	POST https://{wipo-hostname}/requests/retrievals	OSF sends a document retrieval request, receives an ackId and the request status
As a result, OSF downloads a response file from sftp.wipo.int to check retrieval result and if successful the requested document is provided in the response file	GET https://{wipo-hostname}/requests/retrievals	OSF downloads the requested document

Note: There is no document size limitation