generated: '2026-07-19'
method: searched
source: openapi/fave-favepay-omni-openapi.yml
docs: https://developers.myfave.com/fpo-guide.html
model: >-
  Request signing (not a bearer/OAuth scheme). Every request is signed with
  HMAC-SHA256 using the secret key Fave issues per integration during partner
  onboarding. The signing string is the URL-encoded request fields in submission
  order (never alphabetical), excluding `sign` and `country_code`, plus
  `outlet_id` on list, `id` on acknowledge, and `details` on merchant scan. The
  computed digest is passed as `sign` (query param on GET, body field on POST).
  Webhook callbacks carry the same `sign` field and must be verified before use.
summary:
  types:
  - apiKey
  api_key_in:
  - query
schemes:
- name: hmacSignature
  type: apiKey
  in: query
  parameter: sign
  description: HMAC-SHA256 signature computed over the URL-encoded request fields in submission
    order (excluding sign and country_code, and excluding outlet_id on list, id on acknowledge,
    and details on merchant scan), keyed by the secret Fave issued for the integration. On POST
    requests the signature is passed as the sign field in the request body.
  sources:
  - openapi/fave-favepay-omni-openapi.yml