About vin attribute in getRawTransaction

[lostncg]

as Example, link to neoscan

NeoPHP Response

array:13 [▼
  "txid" => "0xd1cef7b3e5afc71617f2a9b0203ad5351a678077690ffe626e1bb6ade1d51bcf"
  "size" => 202
  "type" => "ContractTransaction"
  "version" => 0
  "attributes" => []
  "vin" => array:1 [▼
    0 => array:2 [▼
      "txid" => "0x808252f3bf6e4d561c29643c9ebf0181ae40a59219c6b79990a415a335c44e5b"
      "vout" => 0
    ]
  ]
  "vout" => array:1 [▼
    0 => array:4 [▼
      "n" => 0
      "asset" => "0xc56f33fc6ecfcd0c225c4ab356fee59390af8560be0e930faebe74a6daff7c9b"
      "value" => "200"
      "address" => "AanTXadhgdHzGbmy5ZBPXxR4iPHMivzVPZ"
    ]
  ]
  "sys_fee" => "0"
  "net_fee" => "0"
  "scripts" => array:1 [▶]
  "blockhash" => "0x1173c981404a74d47d6500b9187366eaf3a53d233be517e2ad69d3c2c243d717"
  "confirmations" => 191
  "blocktime" => 1521875926
]

NeoScan API Response

array:21 [▼
  "vouts" => array:1 [▼
    0 => array:4 [▼
      "value" => 200.0
      "n" => 0
      "asset" => "NEO"
      "address" => "AanTXadhgdHzGbmy5ZBPXxR4iPHMivzVPZ"
    ]
  ]
  "vin" => array:1 [▼
    0 => array:5 [▼
      "value" => 200.0
      "txid" => "808252f3bf6e4d561c29643c9ebf0181ae40a59219c6b79990a415a335c44e5b"
      "n" => 0
      "asset" => "NEO"
      "address_hash" => "AHEeAEyCEBj6ev9etuASJS5oa5oZr8gw1L"
    ]
  ]
  "version" => 0
  "type" => "ContractTransaction"
  "txid" => "d1cef7b3e5afc71617f2a9b0203ad5351a678077690ffe626e1bb6ade1d51bcf"
  "time" => 1521875926
  "sys_fee" => "0"
  "size" => 202
  "scripts" => array:1 [▶]
  "script" => null
  "pubkey" => null
  "nonce" => null
  "net_fee" => "0"
  "description" => null
  "contract" => null
  "claims" => null
  "block_height" => 2059552
  "block_hash" => "1173c981404a74d47d6500b9187366eaf3a53d233be517e2ad69d3c2c243d717"
  "attributes" => []
  "asset_moved" => "c56f33fc6ecfcd0c225c4ab356fee59390af8560be0e930faebe74a6daff7c9b"
  "asset" => null
]

My question is:
1.) Why vin doesn't show the sender address?
2.) there is a lot of attribute that didn't provide description, is it any documentation about model structure? (as example, what is "n" represent in vout?)