## Get the return URL

This endpoint returns the URL where you should redirect your customer after payment completed.

## Endpoint signature

```http
POST https://api.reservepay.com/sdk/get-return-url HTTP/1.1
Content-Type: application/json
Accept: application/json

{
  merchant_id: string,
  installation_id: string,
  payment_session_id: string,
}
```

Returns: string

## Request arguments

### `merchant_id` (string)

**Required**. Your merchant ID that uniquely identifies your account.

### `installation_id` (string)

**Required**. The installation ID for this platform (e.g. your iOS app, Android app, website, or terminal).

### `payment_session_id` (string)

**Required**. The ID of the payment session returned from `select-payment-method`.

## Errors specific to this endpoint

### `NOT_FOUND`

This error occurs when we cannot find the merchant account, installation, or payment session with the IDs provided. Double check that you are using the correct IDs.

### `NOT_READY`

This error occurs when the redirect URL is not yet ready. Wait a few seconds and try again.

## 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 is either deprecated or not yet released. This commonly happens when using an outdated SDK or when the API version specified in the request URL is incorrect.