https://portaldev.eonpayments.com/api/v01/merchants/[merchant-code]/fees/[fee-type]/flat                
            Additional fees for transactions of specific type, such as chargebacks, declines, ACH returns. See merchant fee for additional information.
                                                                        | Method: GET | Implicit: Yes | Returns: FlatFee * | 
| Consumes: xurl | Produces: json, xml | |
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                                        Lists flat merchant fees for the given frequency type. 
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                                                                        | Method: POST | Implicit: Yes | Returns: FlatFee * | 
| Consumes: json, xml, xurl | Produces: json, xml | |
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                                        Allows to modify flat merchant fees for the given frequency type. 
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| # | Name | Type | Required | Default | Description | 
|---|---|---|---|---|---|
| 01 | object | FlatFee * | Yes | 
                                                                                                                        Updated object information. Represents fees that are applied to all transactions other than sale and credit.  |