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Whenever a request is to be validated by OTP, the provider microservice should first call the provider, store response info in the database, send an OTP to the phone number attached to the BVN, then respond with WaitingForOTP.
On the OTP validation phase, if user OTP is valid, provider should retrieve info from the database, then respond with a Successful response.
NB: Data should be erased from the DB.
Special notes for providers
This should be seen as a standard payments service. All providers are required to execute settlement per agreed contracts to the account designated by the client bank.