NFTKiosk.sol

The main changes included in version 1 of the Launchpad are as follows:

1. The contract architecture has been reworked.

2. Pricing and discount functionality have been separated into a separate contract.

3. The ability to create an individual storefront (aka showcase) for its owner has been added.

4. The ability to use a personalized pricing and discount contract for each storefront (aka showcase) has been added.

5. Functionality for selling regular ERC-721 standard NFTs has been added.

6. The ability to set individual prices for NFTs and wNFTs has been added.

7. The ability to set prices at the storefront (aka showcase) level for the NFTs and wNFTs placed on it has been added.

8. Various types of discounts have been introduced, including time-based discounts, discounts using promo codes, and referral discounts.

Restrictions:

1. The smart contract can only work with wNFT of Wrapper v.1 version.

2. The sellable ERC-20 tokens should be first in the collateral array of wNFTs.

3. ERC-1155 tokens are not being supported.

4. The contract model of prices and discounts for the showcase should be added in the white list of models. To do it it is necessary to send email to DAO ENVELOP. Email address is [e-mail]. The technical team will contact the email sender to perform the code review of his smart contract.

Method setDisplayParams

function setDisplayParams(
        string calldata _name,
        address _beneficiary, // who will receive assets from sale
        uint256 _enableAfter,
        uint256 _disableAfter,
        address _priceModel
    ) public virtual 

The method registers a storefront (aka showcase) for a user. Only the owner of the storefront (aka showcase) can configure it, set prices, place NFTs and wNFTs on their storefront (aka showcase), and set the size of discounts to them.

The owner needs to come up with a name for the storefront, which users will use in the URL when they visit the launchpad dApp. For example, in the URL "https://stage.appv1.envelop.is/launchpad/5/0xb267e4067886da3566511fa508ffce4b24e656b6/brownie", the last part "brownie" represents the storefront's name.

The method emits a DisplayChanged event with the following details:

• The hash of the storefront name using the SHA-256 algorithm.

• The address of the storefront owner.

• The address of the recipient for funds from the sale of NFTs and wNFTs on the storefront (when sales happen on default storefront (aka showcase)).

• The start date of the sales in Unix time format.

• The end date of the sales in Unix time format.

• The address of the contract for the pricing and discount model for the storefront.

• The storefront name.

Incoming parameters for calling the method:

Name	Type	Description
_name	string	Showcase name
_beneficiary	address	Address of the recipient of funds from the sale of NFT and wNFT (for the default storefront)
_enableAfter	uint256	Sales start date, unixtime format
_disableAfter	uint256	End of sale date, unixtime format
_priceModel	address	Address of the contract model of prices and discounts for the showcase

Method transferDisplay

function transferDisplay(address _to, bytes32 _displayNameHash) 
        external 

The method transfers ownership of a storefront (aka showcase) from the old owner to a new owner.

The method emits a DisplayTransfer event with the following details:

• The hash of the storefront name using the SHA-256 algorithm.

• The old owner of the storefront.

• |The new owner of the storefront.

Incoming parameters for calling the method:

Name	Type	Descriptions
_to	address	New owner of the storefront
_displayNameHash	bytes32	SHA-256 hash of the storefront name

Method addItemToDisplay

function addItemToDisplay(
        bytes32 _displayNameHash,
        ETypes.AssetItem memory _assetItem,
        KTypes.Price[] calldata _prices
    ) 
        public 
        returns  (KTypes.Place memory place)

The method places NFTs (non-fungible tokens) and wNFTs (wrapped non-fungible tokens) on a storefront (aka showcase). Only the owner of a specific showcase can call this method. Before calling the method, the owner must give permission to the Launchpad contract to use their (NFTs and wNFTs). The method transfers the NFTs and wNFTs to the address of the Launchpad smart-contract.

The method emits an event called "ItemAddedToDisplay" with the following details:

• The hash of the storefront name using the SHA-256 algorithm.

• The address of the NFT/wNFT smart contract.

• The tokenId of the NFT/wNFT.

• The index position of the NFT/wNFT in the array of tokens placed on the specific showcase case.

Incoming parameters for the method:

Name	Type	Description
_displayNameHash	bytes32	SHA-256 hash of the storefront (showcase) name
_assetItem	ETypes.AssetItem	Data about NFT/wNFT
_prices	KTypes.Price[]	An array of individual price data for NFT/wNFT. Can be empty. In this case the prices set for the storefront (showcase) will be applied

ETypes.AssetItem

Name	Type	Description
asset	ETypes.Asset	Data about the type and contract of token transferred to the Lunchpad contract
tokenId	uint256	Number of token
amount	amount	Value 0 (zero)

ETypes.Asset

Name	Type	Description
assetType	ETypes.AssetType	The value from Asset Type enum
contractAddress	address	Thr address of the NFT/wNFT smart contract.

ETypes.AssetType: 3 - ERC-721.

KTypes.Price

Name	Type	Description
payWith	address	The smart-contract address of the payment token. In case of payment with native tokens (coin) zero-address is specified
amount	uint256	Number of payment tokens

The method returns values:

Name	Type	Description
display	bytes32	SHA-256 hash of the storefront (showcase) name
index	uint256	The serial number of the placed NFT/wNFT record in the array of tokens placed in this storefront (showcase)

Method addBatchItemsToDisplayWithSamePrice

function addBatchItemsToDisplayWithSamePrice(
        bytes32 _displayNameHash,
        ETypes.AssetItem[] memory _assetItems,
        KTypes.Price[] calldata _prices
    ) 
        external 
        returns  (KTypes.Place[] memory)

The method allows the placement of multiple NFTs/wNFTs on a showcase in a single call. Only the owner of a specific showcase can call this method. Before calling the method, the owner must give permission to the Launchpad contract to use their NFTs and wNFTs. The method transfers the NFTs and wNFTs to the address of the Launchpad contract. Individual pricing settings apply to the entire group of NFTs/wNFTs being placed.

The method emits an event called "ItemAddedToDisplay" for each NFT/wNFT being placed, providing the following details:

• The hash of the showcase name using the SHA-256 algorithm.

• The address of the NFT/wNFT smart contract.

• The tokenId of the NFT/wNFT.

• The index position of the NFT/wNFT in the array of tokens placed on the specific showcase.

Incoming method call parameters:

Name	Type	Description
_displayNameHash	bytes32	SHA-256 hash of the showcase name
_assetItems	ETypes.AssetItem[]	An array of NFT/wNFT data. The description of the data type is made above
_prices	KTypes.Price[]	An array of individual price data for NFT/wNFT. Can be empty. In this case, the prices set for the showcase will be applied. The description of the data type is given above.

The method returns an array of value pairs:

Name	Type	Description
display	bytes32	SHA-256 hash of the showcase name
index	uint256	The serial number of the NFT/wNFT record in the array of tokens placed in this showcase

Method addAssetItemPriceAtIndex

function addAssetItemPriceAtIndex(
        ETypes.AssetItem calldata _assetItem,
        KTypes.Price[] calldata _prices
    ) 
        external 

The method adds prices for NFT/wNFT. The method can only be called by the owner of the showcase where the NFT/wNFT is placed.

The method emits an event called "ItemPriceChanged" with the following details:

• The hash of the showcase name using the SHA-256 algorithm, where the NFT/wNFT is placed.

• The address of the NFT/wNFT smart-contract.

• The tokenId of the NFT/wNFT.

Incoming parameters for the method:

Name	Type	Description
_assetItem	ETypes.AssetItem	Data about the NFT/wNFT for which prices are added. The description of the type was given above
_prices	KTypes.Price[]	An array of data about individual prices for NFT/wNFT to be added. A description of the data type is given above.

Method editAssetItemPriceAtIndex

function editAssetItemPriceAtIndex(
        ETypes.AssetItem calldata _assetItem,
        uint256 _priceIndex,
        KTypes.Price calldata _price
    ) 
        external

The method replaces the price record in the array of individual prices for the NFT/wNFT placed on the showcase. The method can only be called by the owner of the showcase where the NFT/wNFT is placed.

The method emits an event called "ItemPriceChanged" with the following details:

• The hash of the showcase name using the SHA-256 algorithm, where the NFT/wNFT is placed.

• The address of the NFT/wNFT smart-contract.

• The tokenId of the NFT/wNFT.

Incoming parameters for the method:

Name	Type	Description
_assetItem	ETypes.AssetItem	Data about the NFT/wNFT for which prices are changed. The description of the type was given above
_priceIndex	uint256	The sequence number of a record in the array of individual prices for NFT/wNFT. Numbering in the array starts with 0
_prices	KTypes.Price	The individual price data for NFT/wNFT that you want to replace the record in the individual price array. A description of the data type is given above

Method removeLastPersonalPriceForAssetItem

function removeLastPersonalPriceForAssetItem(
        ETypes.AssetItem calldata _assetItem
    ) 
        external 

The method deletes the last record in the array of individual prices for the NFT/wNFT placed on the showcase. The method can only be called by the owner of the showcase, where the NFT/wNFT is placed.

The method emits an event called "ItemPriceChanged" with the following details:

• The hash of the showcase name using the SHA-256 algorithm, where the NFT/wNFT is placed.

• The address of the NFT/wNFT smart-contract.

• The tokenId of the NFT/wNFT.

Incoming parameters for the method:

Name	Type	Description
_assetItem	ETypes.AssetItem	The NFT/wNFT data for which the record from the array of individual prices is deleted. The description of the type was given above

Method buyAssetItem

function buyAssetItem(
        ETypes.AssetItem calldata _assetItem,
        uint256 _priceIndex,
        address _buyer,
        address _referrer,
        string calldata _promo
    ) external payable nonReentrantol

The method allows a user to purchase the NFT/wNFT placed on the showcase. When call the method, the user can send a certain amount of native network coins if he decide to buy for native tokens. Before calling the method, the user must give permission to use ERC-20 tokens, which they intend to use for payment of the NFT/wNFT (if the payment is made with ERC-20 tokens that the showcase owner is willing to accept as payment). The purchase can only be made during the period between the start and end dates of trading the NFT/wNFT on the showcase.

The method emits an event called "EnvelopPurchase" with the following details:

• The hash of the showcase name using the SHA-256 algorithm, where the NFT/wNFT is placed.

• The address of the NFT/wNFT smart-contract.

• The tokenId of the NFT/wNFT.

The method emits an event called "EnvelopReferrer" with the following details (if buyer calls method with filled referrer address):

• The address of referrer.

• The address of buyer.

• The address of payment token smart contract using by buyer to pay

• The amount of payment

• The percent of referrer discount

Incoming parameters for the method:

Name	Type	Description
_assetItem	ETypes.AssetItem	Data about the NFT/wNFT that is being purchased. A description of the type was given above
_priceIndex	uint256	Record index from an array of prices (individual or prices configured for the showcase as a whole) - what will be used to pay for the purchase
_buyer	address	The address of the recipient of the purchased NFT/wNFT, which may be different from the address of the purchaser calling the method
_referrer	address	Referral address, which is added by the showcase owner in the showcase settings
_promo	string	Promo-code added by the showcase owner in the showcase settings

Method getDisplayOwner

function getDisplayOwner(bytes32 _displayNameHash) public view returns (address)

The method returns the address of the showcase owner.

Incoming parameters for the method:

Name	Type	Description
_displayNameHash	bytes32	SHA-256 hash of the showcase name

Returned values:

owner	address	The address of the owner of the showcase

Method getDisplay

function getDisplay(bytes32 _displayNameHash) 
        public 
        view 
        returns (KTypes.Display memory)

The method returns information about the showcase.

Incoming parameters for the method:

Name	Type	Description
_displayNameHash	bytes32	SHA-256 hash of the showcase name

Returned values:

Name	Type	Description
display	KTypes.Display	Information about the showcase

KTypes.Display

Name	Type	Description
owner	address	The address of the owner of the showcase
beneficiary	address	Address of the recipient of funds from the sale of NFT and wNFT (for the default showcase)
enableAfter	uint256	Sales start date, unixtime format
disableAfter	uint256	End of sale date, unixtime format
priceModel	address	Address of the smart contract model of prices and discounts for the showcase
items	KTypes.ItemForSale[]	Array of data about NFT/wNFT placed on the showcase and individual prices for each

KTypes.ItemForSale

Name	Type	Description
owner	address	Address of the recipient of funds from the sale of a particular NFT/wNFT - for custom showcase
nft	ETypes.AssetItem	Data about placed NFT/wNFT. A description of the type was given above
prices	KTypes.Price[]	Array of individual price data for placed NFT/wNFT. Can be empty. In this case, the prices set for the showcase will be applied. The description of the type was given above

Method getAssetItemPlace

function getAssetItemPlace(ETypes.AssetItem memory _assetItem) 
        public 
        view 
        returns  (KTypes.Place memory)

The method returns data about the showcase where the NFT/wNFT is placed.

Incoming parameters for the method:

Name	Type	Description
_assetItem	ETypes.AssetItem	Data about placed NFT/wNFT. A description of the type was given above

Returned values:

Name	Type	Description
display	bytes32	SHA-256 hash of the showcase name
index	uint256	The serial number of the NFT/wNFT record in the array of tokens placed in this showcase

Method getAssetItemPricesAndDiscounts

function getAssetItemPricesAndDiscounts(
        ETypes.AssetItem memory _assetItem,
        address _buyer,
        address _referrer,
        string calldata _promo
    ) 
        external 
        view
        returns (KTypes.Price[] memory, KTypes.Discount[] memory)

The method returns data about prices and discounts for placed NFT/wNFT.

Incoming parameters for the method:

Name	Type	Description
_assetItem	ETypes.AssetItem	Data about the NFT/wNFT that is being purchased. A description of the type was given above
_buyer	address	Address of the recipient of the purchased NFT/wNFT
_referrer	address	Referral address, which is added by the showcase owner in the showcase settings
_promo	string	Promo-code added by the showcase owner in the showcase settings

Returned values:

Name	Type	Description
prices	KTypes.Price[]	Array with prices for placed NFT/wNFT. The description of the data type is given above
discount	KTypes.Discount[]	Array with data about discounts that apply to the given NFT/wNFT, taking into account the data passed to the method about the promo-code and referral

KTypes.Discount:

Name	Type	Description
dsctType	DiscountType	The value from discount types enum
dsctPercent	uint16	Discount size: 100%-10000, 20%-2000, 3%-300

DiscountType:

• 0 - promo-discount (PROMO)

• 1 - referral-discount (REFERRAL)

• 2 - discount by volume of purchases (BATCH)

• 3 - discount by time (TIME)

• 4 - discount for members of "white-lists" (WHITELIST)

• 5, 6, 7 - discounts which can be set in the contract price and discount models by the the showcase owner (CUSTOM1, CUSTOM2, CUSTOM3)

Method getDisplayAssetItems

function getDisplayAssetItems(bytes32 _displayNameHash) 
        public 
        view 
        virtual
        returns (KTypes.ItemForSale[] memory) 

The method returns for the showcase information about all NFTs and wNFT placed on it and not yet sold.

Incoming parameters for the method:

Name	Type	Description
_displayNameHash	bytes32	SHA-256 hash of the showcase name

Returned values:

Name	Type	Description
items	ItemForSale[]	An array of data about NFTs/wNFTs placed in the showcase and individual prices for each. Description of the data type is given above

Method getAssetItem

function getAssetItem(ETypes.AssetItem memory _assetItem)
        public
        view
        returns (KTypes.ItemForSale memory)

The method returns settings data for a particular NFT/wNFT.

Incoming parameters for the method:

Name	Type	Description
_assetItem	ETypes.AssetItem	Data about NFT/wNFT. A description of the type was given above

Returned values:

items	ItemForSale	Data about the placed NFT/wNFT on the showcase and individual prices for it. A description of the data type is given above

Method hlpHashString

function hlpHashString(string memory _name) public pure returns (bytes32)

The method returns SHA-256 hash for a value.

Incoming parameters for the method:

Name	Type	Description
_name	string	The value for encoding

Returned values:

Name	Type	Description
hash	bytes32	SHA-256 hash for a value