OnTrac-REST - Void

{
  "carrier": "OnTrac-REST",
  "action": "voidshipment",
  "params": {
    "username": "your-wsid",
    "password": "your-wskey",
    "test": true,
    "tracking_number": "1TCYEYW30019O42Y"
  }
}

<?php
$rs = new RocketShipIt;
$response = $rs->request(
array (
  'carrier' => 'OnTrac-REST',
  'action' => 'voidshipment',
  'params' => 
  array (
    'username' => 'your-wsid',
    'password' => 'your-wskey',
    'test' => true,
    'tracking_number' => '1TCYEYW30019O42Y',
  ),
)
);

rs.request(
  {'action': 'voidshipment',
 'carrier': 'OnTrac-REST',
 'params': {'password': 'your-wskey',
            'test': True,
            'tracking_number': '1TCYEYW30019O42Y',
            'username': 'your-wsid'}}

)

rs.request(
  {"carrier"=>"OnTrac-REST",
 "action"=>"voidshipment",
 "params"=>
  {"username"=>"your-wsid",
   "password"=>"your-wskey",
   "test"=>true,
   "tracking_number"=>"1TCYEYW30019O42Y"}}

)

rocketshipit.request(
  {
  "carrier": "OnTrac-REST",
  "action": "voidshipment",
  "params": {
    "username": "your-wsid",
    "password": "your-wskey",
    "test": true,
    "tracking_number": "1TCYEYW30019O42Y"
  }
}
)