# Ticket Lookup

## Happy Path

```mermaid
sequenceDiagram
participant UI
participant API
participant DB

UI ->> UI: Decode QrCode
UI ->> API: Send TicketId from QrCode
API ->> DB: Query Ticket
DB -->> API: Ticket Returned, if found
API ->> DB: Query Event from Ticket
DB -->> API: Event Information Returned
API ->> API: Check for Ticket Validity
API ->> UI: Return Ticket Validity
```

## No Ticket Found

```mermaid
sequenceDiagram
participant UI
participant API
participant DB

UI ->> UI: Decode QrCode
UI ->> API: Send TicketId from QrCode
API ->> DB: Query Ticket
DB -->> API: None Found
API ->> UI: Ticket Not Found
```