## Filter Payments

Returns a paginated list of payments for the authenticated merchant with advanced filtering capabilities.

This endpoint provides comprehensive search functionality using the SearchIndex infrastructure,
allowing you to filter payments by various criteria including status, payment method, currency,
amount ranges, and date ranges.

The response includes pagination controls with `previous` and `next` cursors that can be used
to navigate through the payment history efficiently.

### Features:
- **Full-text search**: Search across payment content
- **Advanced filtering**: Filter by status, payment method, currency, amount, contact, dates, and fraud finding
- **Contact filtering**: Filter by contact internal ID or external ID
- **Date range support**: Support for specific dates, datetimes, date ranges, datetime ranges, and keywords
- **Pagination**: Efficient cursor-based pagination
- **Merchant-scoped**: Only returns payments for the authenticated merchant

## Endpoint signature

```http
POST https://api.reservepay.com/merchants/filter-payments HTTP/1.1
Content-Type: application/json
Accept: application/json
Authorization: Bearer <token>

{
  per_page: number?,
  page: number?,
  status: string?,
  created_at: string?,
  authorized_at: string?,
  captured_at: string?,
  payment_method: string?,
  currency: string?,
  amount: string?,
  contact_id: string?,
  terms: string?,
  fraud_finding: string?,
}
```

Returns: object

## Request arguments

### `per_page` (number)

_Optional_. Number of payments to return per page. Default: 10, Maximum: 100

### `page` (number)

_Optional_. Page number for pagination. Default: 1 (first page)

### `status` (string)

_Optional_. Filter by payment status. Examples: 'PENDING', 'SUCCESSFUL', 'AUTHORIZED', 'VOIDED', 'REVERSED', 'FAILED'

Allowed values:

- `PENDING`
- `SUCCESSFUL`
- `AUTHORIZED`
- `VOIDED`
- `REVERSED`
- `FAILED`
- `EXPIRED`
- `DISPUTED`
- `REFUNDED`

### `created_at` (string)

_Optional_. Filter by creation date/time. Supports: specific date (YYYY-MM-DD), datetime (ISO8601), date range (YYYY-MM-DD..YYYY-MM-DD), datetime range (ISO8601..ISO8601), or keywords (today, yesterday, `this_week`, `last_week`, `this_month`, `last_month`)

### `authorized_at` (string)

_Optional_. Filter by authorize date/time. Supports: specific date (YYYY-MM-DD), datetime (ISO8601), date range (YYYY-MM-DD..YYYY-MM-DD), datetime range (ISO8601..ISO8601), or keywords (today, yesterday, `this_week`, `last_week`, `this_month`, `last_month`)

### `captured_at` (string)

_Optional_. Filter by capture date/time. Supports: specific date (YYYY-MM-DD), datetime (ISO8601), date range (YYYY-MM-DD..YYYY-MM-DD), datetime range (ISO8601..ISO8601), or keywords (today, yesterday, `this_week`, `last_week`, `this_month`, `last_month`)

### `payment_method` (string)

_Optional_. Filter by payment method name. Examples: 'card', 'promptpay', 'k_plus'

### `currency` (string)

_Optional_. Filter by currency code. Examples: 'THB', 'USD'. Case-insensitive.

### `amount` (string)

_Optional_. Filter by amount. Supports: exact amount (1000), range (1000..5000), or boundless ranges (1000.. or ..5000). Amounts are in the smallest currency unit (cents for USD).

### `contact_id` (string)

_Optional_. Filter by contact ID. Accepts either internal UID (starting with `ctc_` ) or external ID. Examples: `ctc_1234567890` or `ext_1234567890`

### `terms` (string)

_Optional_. Full-text search across payment content. Searches payment method names, and customer email addresses. Uses fuzzy matching for partial text matches. Examples: 'visa', 'stripe', 'john@example.com'

### `fraud_finding` (string)

_Optional_. Filter by fraud finding result. Examples: 'safe', 'risky'

Allowed values:

- ``
- `safe`
- `risky`

## Response attributes

### `previous` (object)

_Nullable_. Pagination for the previous page. Contains 'before' (page number) and 'per_page' (page size) parameters. Use these values in the 'page' and 'per_page' parameters of the next request to get the previous page. Returns null if there is no previous page.

### `page` (array)

**Always present**. The current page of records, ordered by creation date (newest first). Each record is serialized according to the specified record_serializer option.

### `next` (object)

_Nullable_. Pagination for the next page. Contains 'after' (page number) and 'per_page' (page size) parameters. Use these values in the 'page' and 'per_page' parameters of the next request to get the next page. Returns null if there is no next page.

## Errors common to all endpoints

### `UNHANDLED_ERROR`

This error occurs when the server encounters an unexpected internal error that
it cannot handle gracefully. This typically happens due to bugs, infrastructure
issues, or edge cases that weren't anticipated during development.

### `INVALID_ARGUMENTS`

This error occurs when the request contains invalid or missing parameters.
Common cases include missing required fields, or values that don't match the
expected format or type.

### `BAD_VERSION`

This error occurs when making requests to an API version that does not exist.
This commonly happens when using an outdated SDK or when the API version
specified in the request URL is incorrect.