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1import FungibleToken from 0xf233dcee88fe0abe
2import NonFungibleToken from 0x1d7e57aa55817448
3import DapperUtilityCoin from 0xead892083b3e2c6c
4import MFLPlayer from 0x8ebcbfd516b1da27
5import NFTStorefront from 0x4eb8a10cb9f87357
6
7/**
8  This transaction can be used to place a Player NFT for sale on a marketplace such that a specified percentage of the proceeds of the sale
9  go to the dapp as a royalty.
10**/
11
12transaction(saleItemID: UInt64, saleItemPrice: UFix64, royaltyPercent: UFix64) {
13    let sellerPaymentReceiver: Capability<&{FungibleToken.Receiver}>
14    let nftProviderCap: Capability<auth(NonFungibleToken.Withdraw) &MFLPlayer.Collection>
15    let storefront: auth(NFTStorefront.CreateListing, NFTStorefront.RemoveListing) &NFTStorefront.Storefront
16    let dappAddress: Address
17
18    // It's important that the dapp account authorize this transaction so the dapp as the ability
19    // to validate and approve the royalty included in the sale.
20    prepare(dapp: &Account, seller: auth(BorrowValue, IssueStorageCapabilityController, PublishCapability, UnpublishCapability, LoadValue, SaveValue, CopyValue) &Account) {
21        self.dappAddress = dapp.address
22
23        // If the account doesn't already have a Storefront
24        if seller.storage.borrow<&NFTStorefront.Storefront>(from: NFTStorefront.StorefrontStoragePath) == nil {
25            // Save a new .Storefront to account storage
26            seller.storage.save(
27                <- NFTStorefront.createStorefront(),
28                to: NFTStorefront.StorefrontStoragePath
29            )
30            // create a public capability for the .Storefront & publish
31            let storefrontPublicCap = seller.capabilities.storage.issue<&{NFTStorefront.StorefrontPublic}>(
32                NFTStorefront.StorefrontStoragePath
33            )
34            seller.capabilities.publish(storefrontPublicCap, at: NFTStorefront.StorefrontPublicPath)
35        }
36
37        // Get a reference to the receiver that will receive the fungible tokens if the sale executes.
38        self.sellerPaymentReceiver = seller.capabilities.get<&{FungibleToken.Receiver}>(/public/dapperUtilityCoinReceiver)
39        assert(self.sellerPaymentReceiver.check(), message: "Missing or mis-typed DapperUtilityCoin receiver")
40
41        // If the user does not have their collection set up
42        if seller.storage.borrow<&MFLPlayer.Collection>(from: MFLPlayer.CollectionStoragePath) == nil {
43          let collection <- MFLPlayer.createEmptyCollection(nftType: Type<@MFLPlayer.NFT>())
44          seller.storage.save(<-collection, to: MFLPlayer.CollectionStoragePath)
45
46          seller.capabilities.unpublish(MFLPlayer.CollectionPublicPath)
47          let collectionCap = seller.capabilities.storage.issue<&MFLPlayer.Collection>(MFLPlayer.CollectionStoragePath)
48          seller.capabilities.publish(collectionCap, at: MFLPlayer.CollectionPublicPath)
49        }
50
51        // Get a capability to access the user's NFT collection.
52        let nftProviderCapStoragePath: StoragePath = /storage/MFLPlayerCollectionCap
53        let cap = seller.storage.copy<Capability<auth(NonFungibleToken.Withdraw) &MFLPlayer.Collection>>(from: nftProviderCapStoragePath)
54        if cap != nil && cap!.check() {
55            self.nftProviderCap = cap!
56        } else {
57            // clean this storage slot in case something is there already
58            seller.storage.load<AnyStruct>(from: nftProviderCapStoragePath)
59            self.nftProviderCap = seller.capabilities.storage.issue<auth(NonFungibleToken.Withdraw) &MFLPlayer.Collection>(MFLPlayer.CollectionStoragePath)
60            seller.storage.save(self.nftProviderCap, to: nftProviderCapStoragePath)
61        }
62        assert(self.nftProviderCap.check(), message: "Missing or mis-typed collection provider")
63
64        // Get a reference to the user's NFT storefront
65        self.storefront = seller.storage.borrow<auth(NFTStorefront.CreateListing, NFTStorefront.RemoveListing) &NFTStorefront.Storefront>(
66                from: NFTStorefront.StorefrontStoragePath
67            ) ?? panic("Missing or mis-typed NFTStorefront Storefront")
68
69        // Make sure this NFT is not already listed for sale in this storefront.
70        let existingOffers = self.storefront.getListingIDs()
71        if existingOffers.length > 0 {
72            for listingResourceID in existingOffers {
73                let listing: &{NFTStorefront.ListingPublic}? = self.storefront.borrowListing(listingResourceID: listingResourceID)
74                if listing != nil && listing!.getDetails().nftID == saleItemID && listing!.getDetails().nftType == Type<@MFLPlayer.NFT>(){
75                    self.storefront.removeListing(listingResourceID: listingResourceID)
76                }
77            }
78        }
79    }
80
81    // Make sure dapp is actually the dapp and not some random account
82    pre {
83        self.dappAddress == 0x15e71a9f7fe7d53d : "Requires valid authorizing signature"
84    }
85
86    execute {
87        // Calculate the amout the seller should receive if the sale executes, and the amount
88        // that should be sent to the dapp as a royalty.
89        let amountSeller = saleItemPrice * (1.0 - royaltyPercent)
90        let amountRoyalty = saleItemPrice - amountSeller
91
92        // Get the royalty recipient's public account object
93        let royaltyRecipient = getAccount(0x15e71a9f7fe7d53d)
94
95        // Get a reference to the royalty recipient's Receiver
96        let royaltyReceiverRef = royaltyRecipient.capabilities.get<&{FungibleToken.Receiver}>(/public/dapperUtilityCoinReceiver)
97        assert(royaltyReceiverRef.borrow() != nil, message: "Missing or mis-typed DapperUtilityCoin royalty receiver")
98
99        let saleCutSeller = NFTStorefront.SaleCut(
100            receiver: self.sellerPaymentReceiver,
101            amount: amountSeller
102        )
103
104        let saleCutRoyalty = NFTStorefront.SaleCut(
105            receiver: royaltyReceiverRef,
106            amount: amountRoyalty
107        )
108
109        self.storefront.createListing(
110            nftProviderCapability: self.nftProviderCap,
111            nftType: Type<@MFLPlayer.NFT>(),
112            nftID: saleItemID,
113            salePaymentVaultType: Type<@DapperUtilityCoin.Vault>(),
114            saleCuts: [saleCutSeller, saleCutRoyalty]
115        )
116    }
117}