{
    "states": [
        "Disconnected",
        "Connected",
        "Authenticated",
        "Need_Account",
        "Accounted",
        "Data_Connection_Ready",
        "Data_Transfer",
        "Restart_Point_Set",
        "Awaiting_RNTO",
        "Logged_Out"
    ],
    "initial_state": "Disconnected",
    "final_states": [
        "Logged_Out"
    ],
    "transitions": [
        {
            "from": "Disconnected",
            "event": "receive USER",
            "action": "reply 331",
            "to": "Connected"
        },
        {
            "from": "Connected",
            "event": "receive PASS",
            "action": "reply 230",
            "to": "Authenticated"
        },
        {
            "from": "Connected",
            "event": "receive PASS",
            "action": "reply 530",
            "to": "Disconnected"
        },
        {
            "from": "Connected",
            "event": "receive PASS",
            "action": "reply 332",
            "to": "Need_Account"
        },
        {
            "from": "Need_Account",
            "event": "receive ACCT",
            "action": "reply 230",
            "to": "Accounted"
        },
        {
            "from": "Need_Account",
            "event": "receive ACCT",
            "action": "reply 332",
            "to": "Need_Account"
        },
        {
            "from": "Authenticated",
            "event": "receive ACCT",
            "action": "reply 230",
            "to": "Accounted"
        },
        {
            "from": "Authenticated",
            "event": "receive ACCT",
            "action": "reply 332",
            "to": "Authenticated"
        },
        {
            "from": "Authenticated",
            "event": "receive PASV",
            "action": "reply 227",
            "to": "Data_Connection_Ready"
        },
        {
            "from": "Authenticated",
            "event": "receive PORT",
            "action": "reply 200",
            "to": "Data_Connection_Ready"
        },
        {
            "from": "Data_Connection_Ready",
            "event": "receive RETR",
            "action": "reply 150",
            "to": "Data_Transfer"
        },
        {
            "from": "Data_Connection_Ready",
            "event": "receive STOR",
            "action": "reply 150",
            "to": "Data_Transfer"
        },
        {
            "from": "Data_Connection_Ready",
            "event": "receive APPE",
            "action": "reply 150",
            "to": "Data_Transfer"
        },
        {
            "from": "Data_Transfer",
            "event": "Transfer Complete",
            "action": "reply 226",
            "to": "Authenticated"
        },
        {
            "from": "Data_Transfer",
            "event": "receive QUIT",
            "action": "reply 221",
            "to": "Logged_Out"
        },
        {
            "from": "Authenticated",
            "event": "receive REST",
            "action": "reply 350",
            "to": "Restart_Point_Set"
        },
        {
            "from": "Restart_Point_Set",
            "event": "receive RETR",
            "action": "reply 150",
            "to": "Data_Transfer"
        },
        {
            "from": "Restart_Point_Set",
            "event": "receive STOR",
            "action": "reply 150",
            "to": "Data_Transfer"
        },
        {
            "from": "Restart_Point_Set",
            "event": "receive APPE",
            "action": "reply 150",
            "to": "Data_Transfer"
        },
        {
            "from": "Authenticated",
            "event": "receive RNFR",
            "action": "reply 350",
            "to": "Awaiting_RNTO"
        },
        {
            "from": "Awaiting_RNTO",
            "event": "receive RNTO",
            "action": "reply 250",
            "to": "Authenticated"
        },
        {
            "from": "Authenticated",
            "event": "receive QUIT",
            "action": "reply 221",
            "to": "Logged_Out"
        },
        {
            "from": "Accounted",
            "event": "receive QUIT",
            "action": "reply 221",
            "to": "Logged_Out"
        },
        {
            "from": "Restart_Point_Set",
            "event": "receive QUIT",
            "action": "reply 221",
            "to": "Logged_Out"
        }
    ]
}