Buy NFT Ticket

UC-1: Buy NFT ticket

Description	This use case describes how a user can buy NFT ticket on DGG marketplace
Actors	· User · System · Blockchain
Preconditions	Users logged in to the website by wallet or email. The account had been linked to a wallet. User has downloaded the game app
Postconditions	· Ticket has been transferred to user’s wallet · The user has gotten the confirmation from the system
Trigger

Basic Flow

Step ID	Actor	Action	Notes and References
BF-1	User	User navigates to the tournament page
BF-2	System	System displays the tournament list
BF-3	User	User opens a NEW tournament
BF-4	User	User clicks Join tournament button
BF-5	System	System validates the user's wallet to check whether he/she already has a ticket for that tournament or not.	AF-1: User already has ticket
BF-6	System	System shows a popup to redirect user to DGG Marketplace
BF-7	User	User clicks on popup to be redirected to the tournament collection on DGG Marketplace	System validates login token to keep login status when the user switches from Game Guild to Marketplace
BF-8	User	User clicks Add to cart, selects quantity
BF-9	User	User submits the order
BF-10	System	System submits the order to the marketplace, generate message, hash message and request user sign it with metamask
BF-11	User	Sign Metamask for the order
BF-12	Blockchain	Process request: Mint NFT to user’s wallet
BF-12	System	Market sends the execution report to the system.
BF-9	System	System displays the execution report/popup/toast message to the User.

Alternate Flows

AF-1: User already has ticket

Step ID	Actor	Action	Notes and References
AF-2-1	User	User selects a team to join
AF-2-2		[Return to UC-2]