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NFT Ticket Contract

  1. Install Foundry:
curl -L https://foundry.paradigm.xyz | bash;
foundryup
  1. Test contract:
forge install
forge build
forge test -vvvv --gas-report
  1. Deploy contract (edit constructor arguments in EventTicket.s.sol):
source .env
forge script script/EventTicket.s.sol:EventTicketScript --rpc-url $GOERLI_RPC_URL --broadcast --verify -vvvv
  • Token standard: ERC1155
  • Inheritances: ERC1155, Ownable, Pausable, ERC1155Supply
  • Each token ID represents one IRL event
State Variable Data Type Usage
ticketPrice mapping(uint => uint) Maps tokenId to price
forSale mapping(uint => bool) Maps whether tokenId is for sale
revenueAddress address The address where ticket fees are sent to
capacity mapping(uint => uint) Maximum supply of each tokenId

Custom/Override functions:

Function Description Declaration
mint(uint, address) Mint a token of based on id to recipient address, send fee to revenueAddress public payable
freeMint(uint, address[]) Mint an event ticket to a list of specific addresses (e.g. for guest, giveaway) public onlyOwner
setRevenueAddress(address) Set the revenue address to a new address public OnlyOwner
setForSale(uint, bool) Toggle the forSale mapping for a tokenId public OnlyOwner
setTicketPrice(uint, uint) Set the ticket price for the given token id public OnlyOwner
setCapacity(uint, uint) Set the event capacity for the given token id public OnlyOwner
createEvent(uint, uint, uint) Create an event by calling setForSale, setTicketPrice, setCapacity public OnlyOwner

Override all the transfer related functions to make it soulbound Also need to expose some internal functions for pausing, etc., use OpenZeppelinContractsWizard for easy setup.

Example Usage for each event:

  1. Create a new event by supplying token id, ticket price, and capacity
  2. Unpause minting (default should be paused)
  3. Users mint tickets at ticket price until capacity is full or until we pause
  4. Owner can also mint tickets to guests or for giveways

Test cases:

  1. Should create event (only owner)
  2. Should mint ticket
  3. Should not mint ticket if msg.value != price
  4. Should not mint ticket if event is at capacity
  5. should not mint ticket if id is not for sale
  6. Should pause/unpause minting (only owner)
  7. Should mint for free to list of addresses (only owner)
  8. Should not transfer tokens