# Offer model - Rides ER changes #### Ride details > v2/internal/er/rides/{hashed_id} * new attribute `is_offer_model` type `boolean` added #### Ride Update >v2/internal/er/rides/{hashed_id}/update * if `is_offer_model` is `true` then fare adjustment will be based on `amount` type: `integer` - which is expected as request params. * if `is_offer_model` is `false` then fare adjustment will be based on `distance` and `duration` as previous implementation. #### Fare breakdown on ride details - for offer_model enabled rides * API contract will remain same * `fare_for_duration`, `fare_for_distance`, `insurance_fee`, `pickup_fee` will be `0` * updated fare breakdown will be based on `reported_fare`