---
# System prepended metadata

title: Get Protocol Research
tags: [Get Protocol]

---

# Get Protocol Research

###### tags: `Get Protocol`

## Overview
![](https://i.imgur.com/rYVu2jJ.png)

## Actions
* The Ticket Engine API has been designed to accept a stream of actions, where each action is an operation that you wish to carry out on the protocol.
* Offering a stream endpoint allows integrators on the protocol to forward mixed batches of action requests to the Ticket Engine API and these will be processed in the order they are received.

### Events
* There are two actions types available for interacting with events; **newEvent** and **updateEvent**, both of which require an eventId.
    * This event ID will not be propagated to the blockchain and is only used as a reference ID for Ticket Engine to use for subsequest requests.
* **newEvent** will queue a transaction to create a new smart contract on the blockchain.
* **updateEvent** will update the event's metadata on-chain. 

### Ticket Lifecycle

![](https://i.imgur.com/CayMr73.png)

There are a number of ticket actions available to change the state of a ticket on-chain:

* **soldTicket** will create an NFT ticket within the event contract created as part of newEvent.
* **resoldTicket** will log a secondary sale event on the ticket.
* **scannedTicket** will issue a non-finalising scan event on a ticket. A scan can happen an unlimited amount of times and should be used for multi-day or multi-gate events.
* **checkedInTicket** is a scan event that finalises the state of the ticket. For a single-gated event a check-in event should be used instead of a scan. Upon check-in the NFT is ready to be claimed into a user's wallet.
* **invalidatedTicket** will also finalise the ticket's lifecycle although this will not enable claiming. To be used for event invalidations & cancellations.
* **claimedTicket** to claim to a user's wallet.

Updating metadata does not affect blockchain storage:

* **updateTicket** will change the NFT Content URI, which is the media file used on NFT marketplaces and wallets.