ipc_message: ptt_response

[AvishaiW]

similar to earlier bugs #38 #35 there are two issues in the json structure:

1. in the encrypted response we have a redundant field EncryptedResponse:

    prefix: b"Enigma Message",
    data: **EncryptedResponse:** enc([(address, stateKey)]),
    pubkey: 'DH pubkey',
    id: '12-bytes-msgID',
}```
2. in the result received on the PTTResponse call, we are **missing** a field `errors`:
```{
    id : <unique_request_id>,
    type : GetPTTRequest,
    result: {
        **errors:** [{address, status}]
    }
}```