Retrieves the details of a specific invoice by its ID. This endpoint allows you to view all relevant information about the invoice, including customer details, items, amounts, and metadata. The retrieved invoice can also be used with the PUT /invoice/{id} endpoint for further updates.

Key Features

Fetches detailed information about an invoice by its unique ID.
Displays invoice attributes, including:
- Customer information (e.g., name, email, address).
- Items and associated costs.
- Payment status and method (if applicable).
- Any metadata or additional fields associated with the invoice.
Supports keyword-based filtering to find invoices tied to specific criteria.

Usage Notes

Filtering by Keywords

Use the keywords[] parameter to search for invoices based on specific attributes. Supported keywords include:

Parameter	Description	Example
`name`	Search by the customer's name.	`keywords[]=John`
`company_name`	Search by the company name.	`keywords[]=ABC Corp`
`email`	Search by email address.	`keywords[]=user@example.com`
`address`	Search by address.	`keywords[]=123 Main St`
`price`	Search by price range or exact price.	`keywords[]=100.00`
`schedule_id`	Search for invoices tied to a specific schedule.	`keywords[]=schedule12345`
`payment_method`	Search by the payment method used (`card` or `bank`). If an invoice is unpaid, `payment_method` will return `null`.

Integration with Update

The retrieved invoice data can be passed to the PUT /invoice/{id} endpoint for modifications.

Response Structure

Code	Response	Reason
200	Success	Invoice details were successfully retrieved.
400	Bad Request	Invalid or missing parameters in the request.
401	Unauthorized	Authentication failed.
404	Not Found	An invoice with the specified ID does not exist.
500	Internal Server Error	Unexpected server error.

Important Considerations

Keyword Search: Utilize the keywords[] parameter to streamline your invoice searches by specific criteria. This feature is especially useful for large datasets.
Payment Method Visibility: If the invoice has not been paid, the payment_method field will be null.
Audit Trail: Ensure proper handling of retrieved invoice data for compliance and record-keeping purposes.