+------------------+
|     Created      |-----------------+
+------------------+                 |
        |                            |
        v                            |
+------------------+                 |
|AwaitingProcessing|----------------+|
+------------------+                || 
        |                           ||
   QUOTATION/UPDATE                 ||
        v                           ||
+------------------+                ||
|     PQOSent      |---CANCEL------+||
+------------------+               vvv
        |                        +-----+
    PROCESSING                   |     |
        v                        |     |
+------------------+   CANCEL    |  C  |
| ServerProcessing |------------>|  A  |
+------------------+    FAIL     |  N  |
        |                        |  C  |
        |                        |  E  | 
      OFFER                      |  L  |
        |                        |  L  |
        v                        |  E  |
+------------------+             |  D  |
|  OfferReceived   |---CANCEL--->|     |
+------------------+             |     |
        | PROCESSING             +-----+
        v                          ^^^
+------------------+               |||
|  OfferProcessing |---DECLINE-----+||
+------------------+                ||
        | ACCEPT                    ||
        v                           ||
+------------------+                ||
|    AcceptSent    |---CANCEL-------+|
+------------------+                 |
        | ACK                        |
        v                            |
+------------------+                 |
|   Completed      |---WITHDRAW------+
+------------------+