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OpenAPI Specification

openapi: 3.2.0
info:
  title: Earnipay Invoicing App QR Code Generator API
  description: FIRS-compliant e-invoicing platform API
  version: '1.0'
  contact: {}
servers: []
tags:
- name: QR Code Generator
  description: Generate FIRS-compliant encrypted QR codes for invoices
paths:
  /v1/qr-generator/generate:
    post:
      description: "Generate a QR code for an invoice by encrypting the IRN with the business's cryptographic keys.\n\n**Process:**\n1. Upload crypto_keys.txt file (downloaded from FIRS dashboard)\n2. Provide IRN (Invoice Reference Number)\n3. System appends Unix timestamp to IRN\n4. System encrypts payload with RSA public key from uploaded file\n5. System generates QR code from encrypted data\n6. Returns QR code as Base64 and Data URL\n\n**FIRS Requirements:**\n- Error correction level H (30% recovery)\n- Minimum 300x300 pixels\n- Contains encrypted IRN with timestamp and certificate hash\n\n**File Format:**\nThe crypto_keys.txt file should contain JSON with public_key and certificate (both base64 encoded):\n```json\n{\n  \"public_key\": \"LS0tLS1CRUdJTiBQVUJMSUMgS0VZLS0tLS0K...\",\n  \"certificate\": \"bEF0V3FJbmo5cVZYbEdCblB4QVpjMG9HVWFrc29GM2hiYWFkYWMyODRBUT0=\"\n}\n```"
      operationId: QrGeneratorController_generateQRCode_v1
      parameters: []
      requestBody:
        required: true
        description: QR Code generation request with crypto keys file
        content:
          multipart/form-data:
            schema:
              type: object
              required:
              - irn
              - cryptoKeysFile
              properties:
                irn:
                  type: string
                  description: Invoice Reference Number (IRN)
                  example: INV0001-94ND90NR-20240611
                cryptoKeysFile:
                  type: string
                  format: binary
                  description: Crypto keys file (crypto_keys.txt downloaded from FIRS)
                errorCorrectionLevel:
                  type: string
                  enum:
                  - L
                  - M
                  - Q
                  - H
                  description: QR code error correction level (H = High 30% recovery, recommended)
                  default: H
                width:
                  type: number
                  description: QR code width in pixels (FIRS requires minimum 300x300)
                  default: 300
                  minimum: 100
                  maximum: 1000
      responses:
        '200':
          description: QR code generated successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GenerateQrCodeResponse'
        '400':
          description: Bad Request - Invalid IRN, crypto keys file, or encryption failed
        '401':
          description: Unauthorized
      security:
      - JWT-auth: []
      summary: Generate FIRS-compliant QR Code
      tags:
      - QR Code Generator
components:
  schemas:
    GenerateQrCodeResponse:
      type: object
      properties:
        base64:
          type: string
          description: Base64 encoded QR code image (PNG format) for storage
          example: iVBORw0KGgoAAAANSUhEUgAA...
        dataURL:
          type: string
          description: Data URL for direct embedding in HTML/PDF
          example: data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA...
        size:
          type: number
          description: QR code size in bytes
          example: 12345
        irn:
          type: string
          description: IRN that was encoded in the QR code
          example: INV0001-94ND90NR-20240611
        encryptedData:
          type: string
          description: Encrypted data that was encoded in the QR code (for debugging)
          example: aLI+LP+gVeA4dTMTYAdemTMOnIY67d0AB1pmH2QXXN2k...
      required:
      - base64
      - dataURL
      - size
      - irn
      - encryptedData
  securitySchemes:
    JWT-auth:
      scheme: bearer
      bearerFormat: JWT
      type: http
      name: JWT
      description: Enter JWT token
      in: header
    API-Key:
      type: apiKey
      in: header
      name: X-API-Key
      description: API Key for third-party integrations