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1. App calls /transact with the right auth details

2. Provider responds with WaitingForOTP or PendingValidation as may be required

3. App calls /transact/validate to supply OTP if needed

4. Provider responds with any of the completion codes Successful or Failed.

5. To query the status of a transaction, the app can call /transact/query

6. Where the provider supports it, the app can call /transact/reverse to request a reversal

INTERFACE SPECIFICATION (APP → ONEPIPE)

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