> ## Documentation Index
> Fetch the complete documentation index at: https://docs.puplar.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Update invoice

> Draft only. Replacing `lines` re-snapshots product names and prices. Customer cannot be changed.



## OpenAPI

````yaml /openapi.json put /invoices/{id}
openapi: 3.0.0
info:
  title: Puplar Integrations API
  version: 1.0.0
  description: >-
    Public API for integrators using **secret keys** (`sk_test_*` /
    `sk_live_*`). Authenticated routes need only **`Authorization: Bearer
    <secret_key>`**. Test keys sandbox payments, virtual accounts, KYC, and bank
    resolve — see guides/test-vs-live for fixtures. Responses follow `{ message,
    data?, errors? }`. Includes customers, collections, payments, products,
    invoices, payouts, wallets, virtual accounts, crypto, refunds, and webhooks.
  contact:
    name: Puplar Support
    email: support@puplar.com
servers:
  - url: https://api.puplar.com
    description: Production
security: []
tags:
  - name: Customers
    description: Customer CRUD and KYC documents
  - name: Virtual accounts
    description: Funding instructions and test deposit simulation
  - name: Webhooks
    description: >-
      Webhook endpoints and delivery logs. Subscriber verification: HMAC-SHA256
      of raw body with webhook secret, header `X-Signature: sha256=<hex>`.
  - name: Payments
    description: One-time payment collection via hosted checkout links
  - name: Crypto
    description: EVM crypto wallet addresses and supported tokens
  - name: Collections
    description: Reusable checkout links
  - name: Products
    description: Catalog items for invoices. Amounts are minor units.
  - name: Invoices
    description: Draft → finalize → paid or void. Finalize returns a payment URL.
  - name: Payouts
    description: >-
      Send wallet funds to a bank account or crypto wallet. Duplicate
      `reference` returns 409.
  - name: Wallets
    description: >-
      Wallet balances per currency (available, pending, total). Amounts in minor
      units.
  - name: Misc
    description: >-
      Country-scoped bank list and account name lookup for payouts (e.g. `ng`
      for Nigeria).
  - name: Meta
    description: Health and service info
paths:
  /invoices/{id}:
    put:
      tags:
        - Invoices
      summary: Update invoice
      description: >-
        Draft only. Replacing `lines` re-snapshots product names and prices.
        Customer cannot be changed.
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                currency:
                  type: string
                  enum:
                    - usd
                    - ngn
                    - eur
                lines:
                  type: array
                  minItems: 1
                  items:
                    type: object
                    required:
                      - product
                      - quantity
                    properties:
                      product:
                        type: string
                      quantity:
                        type: integer
                        minimum: 1
                due_date:
                  type: string
                  format: date-time
                memo:
                  type: string
                  maxLength: 500
                metadata:
                  type: object
                  additionalProperties: true
      responses:
        '200':
          description: Invoice updated
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Success'
        '400':
          description: Not a draft, or validation error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: Invoice not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      security:
        - bearerAuth: []
components:
  schemas:
    Success:
      type: object
      properties:
        message:
          type: string
          example: Success
        data:
          type: object
          nullable: true
    Error:
      type: object
      properties:
        message:
          type: string
          example: Error message
        data:
          type: object
          nullable: true
        errors:
          type: object
          nullable: true
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key
      description: >-
        Secret key: `Authorization: Bearer sk_test_...` or `sk_live_...`.
        Business and live/test mode are inferred from the key.

````