ExchangeRate-API Pair Amount Conversion

arazzo: 1.0.1
info:
  title: ExchangeRate-API Pair Amount Conversion
  summary: Validate currencies against supported codes, then convert a specific amount.
  description: >-
    A money-movement flow that converts a concrete amount from one currency to
    another. It first retrieves the supported currency codes so the base and
    target can be validated, and then calls the pair-conversion-with-amount
    endpoint to return both the live exchange rate and the converted amount.
    Each step inlines its full request, including the API key path parameter,
    so the flow is self-describing.
  version: 1.0.0
sourceDescriptions:
- name: exchangeRateApi
  url: ../openapi/exchangerate-api-openapi.yml
  type: openapi
workflows:
- workflowId: pair-amount-conversion
  summary: Convert a specific amount between two currencies after confirming support.
  description: >-
    Looks up the supported currency codes, then converts the supplied amount
    from the base currency to the target currency at the current exchange rate.
  inputs:
    type: object
    required:
    - apiKey
    - baseCode
    - targetCode
    - amount
    properties:
      apiKey:
        type: string
        description: Your ExchangeRate-API dashboard API key.
      baseCode:
        type: string
        description: ISO 4217 three-letter base currency code (e.g. USD).
      targetCode:
        type: string
        description: ISO 4217 three-letter target currency code (e.g. EUR).
      amount:
        type: number
        description: Decimal amount in the base currency to convert.
  steps:
  - stepId: listSupportedCodes
    description: >-
      Retrieve the supported ISO 4217 currency codes to confirm the base and
      target currencies are available before converting.
    operationId: getSupportedCodes
    parameters:
    - name: api_key
      in: path
      value: $inputs.apiKey
    successCriteria:
    - condition: $statusCode == 200
    - condition: $response.body#/result == "success"
    outputs:
      supportedCodes: $response.body#/supported_codes
  - stepId: convertAmount
    description: >-
      Convert the supplied amount from the base currency to the target currency,
      returning the live rate and the converted result.
    operationId: getPairConversionWithAmount
    parameters:
    - name: api_key
      in: path
      value: $inputs.apiKey
    - name: base_code
      in: path
      value: $inputs.baseCode
    - name: target_code
      in: path
      value: $inputs.targetCode
    - name: amount
      in: path
      value: $inputs.amount
    successCriteria:
    - condition: $statusCode == 200
    - condition: $response.body#/result == "success"
    outputs:
      conversionRate: $response.body#/conversion_rate
      conversionResult: $response.body#/conversion_result
      baseCode: $response.body#/base_code
      targetCode: $response.body#/target_code
  outputs:
    supportedCodes: $steps.listSupportedCodes.outputs.supportedCodes
    conversionRate: $steps.convertAmount.outputs.conversionRate
    conversionResult: $steps.convertAmount.outputs.conversionResult