import FungibleToken from 0xf233dcee88fe0abe import NonFungibleToken from 0x1d7e57aa55817448 import MetadataViews from 0x1d7e57aa55817448 import ViewResolver from 0x1d7e57aa55817448 access(all) contract thecandyshop_NFT: NonFungibleToken { // An entitlement to perform Admin actions on this contract access(all) entitlement Administrator // thecandyshop_NFT Events // // Emitted when an NFT is minted access(all) event Minted(id: UInt64, setId: UInt32, seriesId: UInt32) // Events for Series-related actions // // Emitted when a new Series is created access(all) event SeriesCreated(seriesId: UInt32) // Emitted when a Series is sealed, meaning Series metadata // cannot be updated access(all) event SeriesSealed(seriesId: UInt32) // Emitted when a Series' metadata is updated access(all) event SeriesMetadataUpdated(seriesId: UInt32) // Events for Set-related actions // // Emitted when a new Set is created access(all) event SetCreated(seriesId: UInt32, setId: UInt32) // Emitted when a Set's metadata is updated access(all) event SetMetadataUpdated(seriesId: UInt32, setId: UInt32) // Named Paths // access(all) let CollectionStoragePath: StoragePath access(all) let CollectionPublicPath: PublicPath access(all) let AdminStoragePath: StoragePath // Variable size dictionary of SetData structs access(self) var setData: {UInt32: NFTSetData} // Variable size dictionary of SeriesData structs access(self) var seriesData: {UInt32: SeriesData} // Variable size dictionary of Series resources access(self) var series: @{UInt32: Series} // An NFTSetData is a Struct that holds metadata associated with // a specific NFT Set. access(all) struct NFTSetData { // Unique ID for the Set access(all) let setId: UInt32 // Series ID the Set belongs to access(all) let seriesId: UInt32 // Maximum number of editions that can be minted in this Set access(all) let maxEditions: UInt32 // The JSON metadata for each NFT edition can be stored off-chain on IPFS. // This is an optional dictionary of IPFS hashes, which will allow marketplaces // to pull the metadata for each NFT edition access(self) var ipfsMetadataHashes: {UInt32: String} // Set level metadata // Dictionary of metadata key value pairs access(self) var metadata: {String: String} init( setId: UInt32, seriesId: UInt32, maxEditions: UInt32, ipfsMetadataHashes: {UInt32: String}, metadata: {String: String}) { self.setId = setId self.seriesId = seriesId self.maxEditions = maxEditions self.metadata = metadata self.ipfsMetadataHashes = ipfsMetadataHashes } access(all) fun getIpfsMetadataHash(editionNum: UInt32): String? { return self.ipfsMetadataHashes[editionNum] } access(all) fun getMetadata(): {String: String} { return self.metadata } access(all) fun getMetadataField(field: String): String? { return self.metadata[field] } } // A SeriesData is a struct that groups metadata for a // a related group of NFTSets. access(all) struct SeriesData { // Unique ID for the Series access(all) let seriesId: UInt32 // Dictionary of metadata key value pairs access(self) var metadata: {String: String} init( seriesId: UInt32, metadata: {String: String}) { self.seriesId = seriesId self.metadata = metadata } access(all) fun getMetadata(): {String: String} { return self.metadata } } // A Series is special resource type that contains functions to mint thecandyshop_NFT NFTs, // add NFTSets, update NFTSet and Series metadata, and seal Series. access(all) resource Series { // Unique ID for the Series access(all) let seriesId: UInt32 // Array of NFTSets that belong to this Series access(all) var setIds: [UInt32] // Series sealed state access(all) var seriesSealedState: Bool; // Set sealed state access(self) var setSealedState: {UInt32: Bool}; // Current number of editions minted per Set access(all) var numberEditionsMintedPerSet: {UInt32: UInt32} init( seriesId: UInt32, metadata: {String: String}) { self.seriesId = seriesId self.seriesSealedState = false self.numberEditionsMintedPerSet = {} self.setIds = [] self.setSealedState = {} thecandyshop_NFT.seriesData[seriesId] = SeriesData( seriesId: seriesId, metadata: metadata ) emit SeriesCreated(seriesId: seriesId) } access(all) fun addNftSet( setId: UInt32, maxEditions: UInt32, ipfsMetadataHashes: {UInt32: String}, metadata: {String: String}) { pre { self.setIds.contains(setId) == false: "The Set has already been added to the Series." } // Create the new Set struct var newNFTSet = NFTSetData( setId: setId, seriesId: self.seriesId, maxEditions: maxEditions, ipfsMetadataHashes: ipfsMetadataHashes, metadata: metadata ) // Add the NFTSet to the array of Sets self.setIds.append(setId) // Initialize the NFT edition count to zero self.numberEditionsMintedPerSet[setId] = 0 // Store it in the sets mapping field thecandyshop_NFT.setData[setId] = newNFTSet emit SetCreated(seriesId: self.seriesId, setId: setId) } // updateSeriesMetadata // For practical reasons, a short period of time is given to update metadata // following Series creation or minting of the NFT editions. Once the Series is // sealed, no updates to the Series metadata will be possible - the information // is permanent and immutable. access(all) fun updateSeriesMetadata(metadata: {String: String}) { pre { self.seriesSealedState == false: "The Series is permanently sealed. No metadata updates can be made." } let newSeriesMetadata = SeriesData( seriesId: self.seriesId, metadata: metadata ) // Store updated Series in the Series mapping field thecandyshop_NFT.seriesData[self.seriesId] = newSeriesMetadata emit SeriesMetadataUpdated(seriesId: self.seriesId) } // updateSetMetadata // For practical reasons, a short period of time is given to update metadata // following Set creation or minting of the NFT editions. Once the Series is // sealed, no updates to the Set metadata will be possible - the information // is permanent and immutable. access(all) fun updateSetMetadata( setId: UInt32, maxEditions: UInt32, ipfsMetadataHashes: {UInt32: String}, metadata: {String: String}) { pre { self.seriesSealedState == false: "The Series is permanently sealed. No metadata updates can be made." self.setIds.contains(setId) == true: "The Set is not part of this Series." } let newSetMetadata = NFTSetData( setId: setId, seriesId: self.seriesId, maxEditions: maxEditions, ipfsMetadataHashes: ipfsMetadataHashes, metadata: metadata ) // Store updated Set in the Sets mapping field thecandyshop_NFT.setData[setId] = newSetMetadata emit SetMetadataUpdated(seriesId: self.seriesId, setId: setId) } // mintthecandyshop_NFT // Mints a new NFT with a new ID // and deposits it in the recipients collection using their collection reference // access(all) fun mintthecandyshop_NFT( recipient: &{NonFungibleToken.CollectionPublic}, tokenId: UInt64, setId: UInt32) { pre { self.numberEditionsMintedPerSet[setId] != nil: "The Set does not exist." self.numberEditionsMintedPerSet[setId]! <= thecandyshop_NFT.getSetMaxEditions(setId: setId)!: "Set has reached maximum NFT edition capacity." } // Gets the number of editions that have been minted so far in // this set let editionNum: UInt32 = self.numberEditionsMintedPerSet[setId]! + 1 // deposit it in the recipient's account using their reference recipient.deposit(token: <-create thecandyshop_NFT.NFT( tokenId: tokenId, setId: setId, editionNum: editionNum )) // Update the count of Editions minted in the set self.numberEditionsMintedPerSet[setId] = editionNum } // mintEditionthecandyshop_NFT // Mints a new NFT with a new ID and specific edition Num (random open edition) // and deposits it in the recipients collection using their collection reference // access(all) fun mintEditionthecandyshop_NFT( recipient: &{NonFungibleToken.CollectionPublic}, tokenId: UInt64, setId: UInt32, edition: UInt32) { pre { self.numberEditionsMintedPerSet[setId] != nil: "The Set does not exist." self.numberEditionsMintedPerSet[setId]! <= thecandyshop_NFT.getSetMaxEditions(setId: setId)!: "Set has reached maximum NFT edition capacity." } // deposit it in the recipient's account using their reference recipient.deposit(token: <-create thecandyshop_NFT.NFT( tokenId: tokenId, setId: setId, editionNum: edition )) // Update the count of Editions minted in the set self.numberEditionsMintedPerSet[setId] = self.numberEditionsMintedPerSet[setId]! + 1 } // batchMintthecandyshop_NFT // Mints multiple new NFTs given and deposits the NFTs // into the recipients collection using their collection reference access(all) fun batchMintthecandyshop_NFT( recipient: &{NonFungibleToken.CollectionPublic}, setId: UInt32, tokenIds: [UInt64]) { pre { tokenIds.length > 0: "Number of token Ids must be > 0" } for tokenId in tokenIds { self.mintthecandyshop_NFT( recipient: recipient, tokenId: tokenId, setId: setId ) } } // sealSeries // Once a series is sealed, the metadata for the NFTs in the Series can no // longer be updated // access(all) fun sealSeries() { pre { self.seriesSealedState == false: "The Series is already sealed" } self.seriesSealedState = true emit SeriesSealed(seriesId: self.seriesId) } } // A resource that represents the thecandyshop_NFT NFT // access(all) resource NFT: NonFungibleToken.NFT { // The token's ID access(all) let id: UInt64 // The Set id references this NFT belongs to access(all) let setId: UInt32 // The specific edition number for this NFT access(all) let editionNum: UInt32 // initializer // init( tokenId: UInt64, setId: UInt32, editionNum: UInt32) { self.id = tokenId self.setId = setId self.editionNum = editionNum let seriesId = thecandyshop_NFT.getSetSeriesId(setId: setId)! emit Minted(id: self.id, setId: setId, seriesId: seriesId) } access(all) fun createEmptyCollection(): @{NonFungibleToken.Collection} { return <- thecandyshop_NFT.createEmptyCollection(nftType: Type<@thecandyshop_NFT.NFT>()) } access(all) view fun getViews(): [Type] { return [ Type(), Type(), Type(), Type(), Type(), Type(), Type(), Type(), Type() ] } access(all) fun resolveView(_ view: Type): AnyStruct? { switch view { case Type(): return MetadataViews.Display( name: thecandyshop_NFT.getSetMetadataByField(setId: self.setId, field: "name")!, description: thecandyshop_NFT.getSetMetadataByField(setId: self.setId, field: "description")!, thumbnail: MetadataViews.HTTPFile( url: thecandyshop_NFT.getSetMetadataByField(setId: self.setId, field: "preview")! ) ) case Type(): return MetadataViews.Serial( self.id ) case Type(): let maxEditions = thecandyshop_NFT.setData[self.setId]?.maxEditions ?? 0 let editionName = thecandyshop_NFT.getSetMetadataByField(setId: self.setId, field: "name")! let editionInfo = MetadataViews.Edition(name: editionName, number: UInt64(self.editionNum), max: maxEditions > 0 ? UInt64(maxEditions) : nil) let editionList: [MetadataViews.Edition] = [editionInfo] return MetadataViews.Editions( editionList ) case Type(): if let externalBaseURL = thecandyshop_NFT.getSetMetadataByField(setId: self.setId, field: "external_token_base_url") { return MetadataViews.ExternalURL(externalBaseURL.concat("/").concat(self.id.toString())) } return MetadataViews.ExternalURL("") case Type(): let royalties: [MetadataViews.Royalty] = [] // There is only a legacy {String: String} dictionary to store royalty information. // There may be multiple royalty cuts defined per NFT. Pull each royalty // based on keys that have the "royalty_addr_" prefix in the dictionary. for metadataKey in thecandyshop_NFT.getSetMetadata(setId: self.setId)!.keys { // For efficiency, only check keys that are > 13 chars, which is the length of "royalty_addr_" key if metadataKey.length >= 13 { if metadataKey.slice(from: 0, upTo: 13) == "royalty_addr_" { // A royalty has been found. Use the suffix from the key for the royalty name. let royaltyName = metadataKey.slice(from: 13, upTo: metadataKey.length) let royaltyAddress = thecandyshop_NFT.convertStringToAddress(thecandyshop_NFT.getSetMetadataByField(setId: self.setId, field: "royalty_addr_".concat(royaltyName))!)! let royaltyReceiver: PublicPath = PublicPath(identifier: thecandyshop_NFT.getSetMetadataByField(setId: self.setId, field: "royalty_rcv_".concat(royaltyName))!)! let royaltyCut = thecandyshop_NFT.getSetMetadataByField(setId: self.setId, field: "royalty_cut_".concat(royaltyName))! let cutValue: UFix64 = thecandyshop_NFT.royaltyCutStringToUFix64(royaltyCut) if cutValue != 0.0 { royalties.append(MetadataViews.Royalty( receiver: getAccount(royaltyAddress).capabilities.get<&{FungibleToken.Receiver}>(royaltyReceiver), cut: cutValue, description: thecandyshop_NFT.getSetMetadataByField(setId: self.setId, field: "royalty_desc_".concat(royaltyName))! ) ) } } } } return MetadataViews.Royalties(royalties) case Type(): return thecandyshop_NFT.resolveContractView(resourceType: nil, viewType: Type()) case Type(): return thecandyshop_NFT.resolveContractView(resourceType: nil, viewType: Type()) case Type(): let traitDictionary: {String: AnyStruct} = {} // There is only a legacy {String: String} dictionary to store trait information. // There may be multiple traits defined per NFT. Pull trait information // based on keys that have the "trait_" prefix in the dictionary. for metadataKey in thecandyshop_NFT.getSetMetadata(setId: self.setId)!.keys { // For efficiency, only check keys that are > 6 chars, which is the length of "trait_" key if metadataKey.length >= 6 { if metadataKey.slice(from: 0, upTo: 6) == "trait_" { // A trait has been found. Set the trait name to only the trait key suffix. traitDictionary.insert(key: metadataKey.slice(from: 6, upTo: metadataKey.length), thecandyshop_NFT.getSetMetadataByField(setId: self.setId, field: metadataKey)!) } } } return MetadataViews.dictToTraits(dict: traitDictionary, excludedNames: []) case Type(): return MetadataViews.Medias( [ MetadataViews.Media( file: MetadataViews.HTTPFile( url: thecandyshop_NFT.getSetMetadataByField(setId: self.setId, field: "image")! ), mediaType: self.getMimeType() ) ] ) } return nil } access(all) fun getMimeType(): String { var metadataFileType = thecandyshop_NFT.getSetMetadataByField(setId: self.setId, field: "image_file_type")!.toLower() switch metadataFileType { case "mp4": return "video/mp4" case "mov": return "video/quicktime" case "webm": return "video/webm" case "ogv": return "video/ogg" case "png": return "image/png" case "jpeg": return "image/jpeg" case "jpg": return "image/jpeg" case "gif": return "image/gif" case "webp": return "image/webp" case "svg": return "image/svg+xml" case "glb": return "model/gltf-binary" case "gltf": return "model/gltf+json" case "obj": return "model/obj" case "mtl": return "model/mtl" case "mp3": return "audio/mpeg" case "ogg": return "audio/ogg" case "oga": return "audio/ogg" case "wav": return "audio/wav" case "html": return "text/html" } return "" } } // Admin is a special authorization resource that // allows the owner to perform important NFT // functions // access(all) resource Admin { access(all) fun addSeries(seriesId: UInt32, metadata: {String: String}) { pre { thecandyshop_NFT.series[seriesId] == nil: "Cannot add Series: The Series already exists" } // Create the new Series var newSeries <- create Series( seriesId: seriesId, metadata: metadata ) // Add the new Series resource to the Series dictionary in the contract thecandyshop_NFT.series[seriesId] <-! newSeries } access(all) fun borrowSeries(seriesId: UInt32): &Series { pre { thecandyshop_NFT.series[seriesId] != nil: "Cannot borrow Series: The Series does not exist" } // Get a reference to the Series and return it return (&thecandyshop_NFT.series[seriesId])! } access(all) fun createNewAdmin(): @Admin { return <-create Admin() } } // This is the interface that users can cast their NFT Collection as // to allow others to deposit thecandyshop_NFT into their Collection. It also allows for reading // the details of thecandyshop_NFT in the Collection. access(all) resource interface thecandyshop_NFTCollectionPublic : NonFungibleToken.CollectionPublic { access(all) fun batchDeposit(tokens: @{NonFungibleToken.Collection}) access(all) fun borrowthecandyshop_NFT(id: UInt64): &NFT? { // If the result isn't nil, the id of the returned reference // should be the same as the argument to the function post { (result == nil) || (result?.id == id): "Cannot borrow thecandyshop_NFT reference: The ID of the returned reference is incorrect" } } } // Collection // A collection of thecandyshop_NFT NFTs owned by an account // access(all) resource Collection: thecandyshop_NFTCollectionPublic, NonFungibleToken.Collection { // dictionary of NFT conforming tokens // NFT is a resource type with an UInt64 ID field // access(all) var ownedNFTs: @{UInt64: {NonFungibleToken.NFT}} access(all) view fun getSupportedNFTTypes(): {Type: Bool} { let supportedType: {Type: Bool} = {} supportedType[Type<@thecandyshop_NFT.NFT>()] = true return supportedType } access(all) view fun isSupportedNFTType(type: Type): Bool { if type == Type<@thecandyshop_NFT.NFT>() { return true } return false } // withdraw // Removes an NFT from the collection and moves it to the caller // access(NonFungibleToken.Withdraw) fun withdraw(withdrawID: UInt64): @{NonFungibleToken.NFT} { let token <- self.ownedNFTs.remove(key: withdrawID) ?? panic("missing NFT") return <-token } // batchWithdraw withdraws multiple NFTs and returns them as a Collection // // Parameters: ids: An array of IDs to withdraw // // Returns: @NonFungibleToken.Collection: The collection of withdrawn tokens // access(NonFungibleToken.Withdraw) fun batchWithdraw(ids: [UInt64]): @{NonFungibleToken.Collection} { // Create a new empty Collection var batchCollection <- create Collection() // Iterate through the ids and withdraw them from the Collection for id in ids { batchCollection.deposit(token: <-self.withdraw(withdrawID: id)) } // Return the withdrawn tokens return <-batchCollection } // deposit // Takes a NFT and adds it to the collections dictionary // and adds the ID to the id array // access(all) fun deposit(token: @{NonFungibleToken.NFT}) { let token <- token as! @thecandyshop_NFT.NFT let id: UInt64 = token.id // add the new token to the dictionary which removes the old one let oldToken <- self.ownedNFTs[id] <- token destroy oldToken } // batchDeposit takes a Collection object as an argument // and deposits each contained NFT into this Collection access(all) fun batchDeposit(tokens: @{NonFungibleToken.Collection}) { // Get an array of the IDs to be deposited let keys = tokens.getIDs() // Iterate through the keys in the collection and deposit each one for key in keys { self.deposit(token: <-tokens.withdraw(withdrawID: key)) } // Destroy the empty Collection destroy tokens } // getIDs // Returns an array of the IDs that are in the collection // access(all) view fun getIDs(): [UInt64] { return self.ownedNFTs.keys } access(all) view fun getLength(): Int { return self.ownedNFTs.keys.length } // borrowNFT // Gets a reference to an NFT in the collection // so that the caller can read its metadata and call its methods // access(all) view fun borrowNFT(_ id: UInt64): &{NonFungibleToken.NFT}? { return &self.ownedNFTs[id] } // borrowthecandyshop_NFT // Gets a reference to an NFT in the collection as a thecandyshop_NFT, // exposing all of its fields. // This is safe as there are no functions that can be called on the thecandyshop_NFT. // access(all) fun borrowthecandyshop_NFT(id: UInt64): &NFT? { if let nft = &self.ownedNFTs[id] as &{NonFungibleToken.NFT}? { return nft as! &NFT } return nil } // borrowViewResolver // Gets a reference to the MetadataViews resolver in the collection, // giving access to all metadata information made available. // access(all) view fun borrowViewResolver(id: UInt64): &{ViewResolver.Resolver}? { if let nft = &self.ownedNFTs[id] as &{NonFungibleToken.NFT}? { return nft as &{ViewResolver.Resolver} } return nil } access(all) fun createEmptyCollection(): @{NonFungibleToken.Collection} { return <- create Collection() } // initializer // init () { self.ownedNFTs <- {} } } // createEmptyCollection // public function that anyone can call to create a new empty collection // access(all) fun createEmptyCollection(nftType: Type): @{NonFungibleToken.Collection} { return <- create Collection() } access(all) view fun getContractViews(resourceType: Type?): [Type] { return [ Type(), Type() ] } access(all) fun resolveContractView(resourceType: Type?, viewType: Type): AnyStruct? { switch viewType { case Type(): return MetadataViews.NFTCollectionData( storagePath: thecandyshop_NFT.CollectionStoragePath, publicPath: thecandyshop_NFT.CollectionPublicPath, publicCollection: Type<&thecandyshop_NFT.Collection>(), publicLinkedType: Type<&thecandyshop_NFT.Collection>(), createEmptyCollectionFunction: (fun (): @{NonFungibleToken.Collection} { return <-thecandyshop_NFT.createEmptyCollection(nftType: Type<@thecandyshop_NFT.NFT>()) }) ) case Type(): let squareImage = MetadataViews.Media( file: MetadataViews.HTTPFile( url: "undefined/thecandyshop/square.png" ), mediaType: "image/png" ) let bannerImage = MetadataViews.Media( file: MetadataViews.HTTPFile( url: "undefined/thecandyshop/banner.png" ), mediaType: "image/png" ) var socials: {String: MetadataViews.ExternalURL} = {} //TODO: Hardcode socials here or add way to string replace during // contract code generation // // socials.insert(key: "twitter", MetadataViews.ExternalURL("https://")) // socials.insert(key: "facebook", MetadataViews.ExternalURL("https://")) return MetadataViews.NFTCollectionDisplay( name: "thecandyshop_DISPLAY_NAME", description: "thecandyshop_DISPLAY_DESCRIPTION", externalURL: MetadataViews.ExternalURL("thecandyshop_EXTERNAL_URL"), squareImage: squareImage, bannerImage: bannerImage, socials: socials ) } return nil } // getAllSeries returns all the sets // // Returns: An array of all the series that have been created access(all) fun getAllSeries(): [thecandyshop_NFT.SeriesData] { return thecandyshop_NFT.seriesData.values } // getAllSets returns all the sets // // Returns: An array of all the sets that have been created access(all) fun getAllSets(): [thecandyshop_NFT.NFTSetData] { return thecandyshop_NFT.setData.values } // getSeriesMetadata returns the metadata that the specified Series // is associated with. // // Parameters: seriesId: The id of the Series that is being searched // // Returns: The metadata as a String to String mapping optional access(all) fun getSeriesMetadata(seriesId: UInt32): {String: String}? { return thecandyshop_NFT.seriesData[seriesId]?.getMetadata() } // getSetMaxEditions returns the the maximum number of NFT editions that can // be minted in this Set. // // Parameters: setId: The id of the Set that is being searched // // Returns: The max number of NFT editions in this Set access(all) view fun getSetMaxEditions(setId: UInt32): UInt32? { return thecandyshop_NFT.setData[setId]?.maxEditions } // getSetMetadata returns all the metadata associated with a specific Set // // Parameters: setId: The id of the Set that is being searched // // Returns: The metadata as a String to String mapping optional access(all) fun getSetMetadata(setId: UInt32): {String: String}? { return thecandyshop_NFT.setData[setId]?.getMetadata() } // getSetSeriesId returns the Series Id the Set belongs to // // Parameters: setId: The id of the Set that is being searched // // Returns: The Series Id access(all) fun getSetSeriesId(setId: UInt32): UInt32? { return thecandyshop_NFT.setData[setId]?.seriesId } // getSetMetadata returns all the ipfs hashes for each nft // edition in the Set. // // Parameters: setId: The id of the Set that is being searched // // Returns: The ipfs hashes of nft editions as a Array of Strings access(all) fun getIpfsMetadataHashByNftEdition(setId: UInt32, editionNum: UInt32): String? { // Don't force a revert if the setId or field is invalid if let set = thecandyshop_NFT.setData[setId] { return set.getIpfsMetadataHash(editionNum: editionNum) } else { return nil } } // getSetMetadataByField returns the metadata associated with a // specific field of the metadata // // Parameters: setId: The id of the Set that is being searched // field: The field to search for // // Returns: The metadata field as a String Optional access(all) fun getSetMetadataByField(setId: UInt32, field: String): String? { // Don't force a revert if the setId or field is invalid if let set = thecandyshop_NFT.setData[setId] { return set.getMetadataField(field: field) } else { return nil } } // stringToAddress Converts a string to a Flow address // // Parameters: input: The address as a String // // Returns: The flow address as an Address Optional access(all) fun convertStringToAddress(_ input: String): Address? { var address=input if input.utf8[1] == 120 { address = input.slice(from: 2, upTo: input.length) } var r:UInt64 = 0 var bytes = address.decodeHex() while bytes.length>0{ r = r + (UInt64(bytes.removeFirst()) << UInt64(bytes.length * 8 )) } return Address(r) } // royaltyCutStringToUFix64 Converts a royalty cut string // to a UFix64 // // Parameters: royaltyCut: The cut value 0.0 - 1.0 as a String // // Returns: The royalty cut as a UFix64 access(all) fun royaltyCutStringToUFix64(_ royaltyCut: String): UFix64 { var decimalPos = 0 if royaltyCut[0] == "." { decimalPos = 1 } else if royaltyCut[1] == "." { if royaltyCut[0] == "1" { // "1" in the first postiion must be 1.0 i.e. 100% cut return 1.0 } else if royaltyCut[0] == "0" { decimalPos = 2 } } else { // Invalid royalty value return 0.0 } var royaltyCutStrLen = royaltyCut.length if royaltyCut.length > (8 + decimalPos) { // UFix64 is capped at 8 digits after the decimal // so truncate excess decimal values from the string royaltyCutStrLen = (8 + decimalPos) } let royaltyCutPercentValue = royaltyCut.slice(from: decimalPos, upTo: royaltyCutStrLen) var bytes = royaltyCutPercentValue.utf8 var i = 0 var cutValueInteger: UInt64 = 0 var cutValueDivisor: UFix64 = 1.0 let zeroAsciiIntValue: UInt64 = 48 // First convert the string to a non-decimal Integer while i < bytes.length { cutValueInteger = (cutValueInteger * 10) + UInt64(bytes[i]) - zeroAsciiIntValue cutValueDivisor = cutValueDivisor * 10.0 i = i + 1 } // Convert the resulting Integer to a decimal in the range 0.0 - 0.99999999 return (UFix64(cutValueInteger) / cutValueDivisor) } // initializer // init() { // Set named paths self.CollectionStoragePath = /storage/thecandyshop_NFTCollection self.CollectionPublicPath = /public/thecandyshop_NFTCollection self.AdminStoragePath = /storage/thecandyshop_NFTAdmin self.setData = {} self.seriesData = {} self.series <- {} // Put Admin in storage self.account.storage.save(<-create Admin(), to: self.AdminStoragePath) let collectionCap: Capability<&thecandyshop_NFT.Collection> = self.account.capabilities.storage.issue<&thecandyshop_NFT.Collection>(self.CollectionStoragePath) self.account.capabilities.publish(collectionCap, at: self.CollectionPublicPath) } }