Alto Investment Status Webhooks

# Derived by API Evangelist from Alto's published webhook documentation.
# Alto does NOT publish an AsyncAPI document. Every channel, event name, payload
# field and description below is taken verbatim from
# https://readme.altoira.com/docs/investment-status-and-webhooks
# The delivery URL is registered with Alto out of band (per-partner) and is not
# published, so the server is described generically rather than invented.
asyncapi: 3.0.0
info:
  title: Alto Investment Status Webhooks
  version: '1.0.0'
  description: >-
    Alto pushes investment-lifecycle events to a Platform Partner's registered
    webhook endpoint so the partner can track an investor's progress through the
    Direction of Investment (DOI), funding and any post-commitment changes. Alto
    describes investment_signed, investment_paid and investment_cancelled as "the
    three most valuable webhooks provided". Investment status can also be pulled
    on demand with the getInvestment operation in the REST API.
  contact:
    name: AltoIRA
    email: help@altoira.com
    url: https://www.altoira.com
  externalDocs:
    description: Investment Status and Webhooks
    url: https://readme.altoira.com/docs/investment-status-and-webhooks
defaultContentType: application/json
servers:
  partnerEndpoint:
    host: partner-supplied.example
    protocol: https
    description: >-
      The HTTPS endpoint the Platform Partner registers with Alto to receive
      investment events. Alto does not publish a single shared delivery host; the
      endpoint is configured per partner during onboarding.
channels:
  investmentEvents:
    address: /
    title: Investment lifecycle events
    description: >-
      A single webhook channel carrying every investment status event. The event
      is discriminated by the event_name field in the payload.
    messages:
      investmentSigned:
        $ref: '#/components/messages/investmentSigned'
      investmentPaid:
        $ref: '#/components/messages/investmentPaid'
      investmentCancelled:
        $ref: '#/components/messages/investmentCancelled'
      commitmentAmountChanged:
        $ref: '#/components/messages/commitmentAmountChanged'
      newContributionApproved:
        $ref: '#/components/messages/newContributionApproved'
      investmentIncreaseRejected:
        $ref: '#/components/messages/investmentIncreaseRejected'
operations:
  receiveInvestmentEvent:
    action: receive
    channel:
      $ref: '#/channels/investmentEvents'
    summary: Receive an investment status event from Alto
    messages:
    - $ref: '#/channels/investmentEvents/messages/investmentSigned'
    - $ref: '#/channels/investmentEvents/messages/investmentPaid'
    - $ref: '#/channels/investmentEvents/messages/investmentCancelled'
    - $ref: '#/channels/investmentEvents/messages/commitmentAmountChanged'
    - $ref: '#/channels/investmentEvents/messages/newContributionApproved'
    - $ref: '#/channels/investmentEvents/messages/investmentIncreaseRejected'
components:
  schemas:
    investmentEvent:
      type: object
      description: >-
        The event envelope Alto publishes in its documentation example. Field
        names are taken verbatim from the published sample payload.
      properties:
        event_name:
          type: string
          description: The name of the investment event being delivered.
        offering_id:
          type: string
          description: >-
            The external_id of the offering, i.e. the ID the Platform Partner
            uses internally to identify this offering.
        alto_investment_id:
          type: integer
          description: Alto's own identifier for the investment.
          examples:
          - 657
        external_investment_id:
          type: string
          description: The Platform Partner's own identifier for the investment.
        nonce:
          type: integer
          description: >-
            A per-delivery nonce included in the payload. Alto's documentation
            shows the field but does not publish a signature-verification scheme
            for it.
          examples:
          - 7074343911774
      required:
      - event_name
      - offering_id
      - alto_investment_id
  messages:
    investmentSigned:
      name: investment_signed
      title: Investment signed
      summary: Investor signs DOI for initial commitment amount
      contentType: application/json
      payload:
        $ref: '#/components/schemas/investmentEvent'
      examples:
      - name: investmentSigned
        payload:
          event_name: investment_signed
          offering_id: '[external_id]'
          alto_investment_id: 657
          external_investment_id: '[external_investment_id]'
          nonce: 7074343911774
    investmentPaid:
      name: investment_paid
      title: Investment paid
      summary: Alto sends payment for the investor's commitment
      contentType: application/json
      payload:
        $ref: '#/components/schemas/investmentEvent'
    investmentCancelled:
      name: investment_cancelled
      title: Investment cancelled
      summary: >-
        The investor has alerted Alto that they have chosen to not take part in
        this investment. Note the two l's in "cancelled".
      description: >-
        Not triggered if the investor has not completed their Direction of
        Investment.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/investmentEvent'
    commitmentAmountChanged:
      name: commitment_amount_changed
      title: Commitment amount changed
      summary: >-
        The investor has alerted Alto that they would like to make a change to
        their commitment amount.
      description: >-
        Alto describes this as extremely rare and recommends investors make
        commitment changes on the Platform Partner's site first.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/investmentEvent'
    newContributionApproved:
      name: new_contribution_approved
      title: New contribution approved
      summary: The investor has signed the DOI for an investment increase
      contentType: application/json
      payload:
        $ref: '#/components/schemas/investmentEvent'
    investmentIncreaseRejected:
      name: investment_increase_rejected
      title: Investment increase rejected
      summary: >-
        The investor has informed Alto that they do not intend to complete the
        DOI for an investment increase.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/investmentEvent'