Redirect Flow

PSUTPP ApplicationASPSP

1. Initiate Action

2. Create Payment Resource

3. Respond with scaRedirect

4. Redirect PSU to URL

5. PSU authenticates with ASPSP

6. Redirect PSU to tppRedirectURI

7. TPP completes process

Decoupled Flow

PSUTPP ApplicationASPSP

1. Initiate Action

2. Create Payment Resource

3. Respond psuAuthRequired

4. Push Notification to Device

5. Poll for status

6. PSU Approves on Device

7. Respond scaStatus: finalised

Embedded Flow

PSUTPP ApplicationASPSP

1. Initiate Action

2. Create Payment Resource

3. Respond with SCA methods

4. PSU enters credentials in TPP

5. Send credentials

6. Respond scaStatus: finalised