import NonFungibleToken from 0x1d7e57aa55817448 import DarkCountry from 0xc8c340cebd11f690 import DarkCountryMarket from 0xc8c340cebd11f690 import FungibleToken from 0xf233dcee88fe0abe import FlowToken from 0x1654653399040a61 transaction(saleItemID: UInt64, saleItemPrice: UFix64) { let flowVault: Capability<&FlowToken.Vault{FungibleToken.Receiver}> let darkCountryCollection: Capability<&DarkCountry.Collection{NonFungibleToken.Provider}> let marketCollection: &DarkCountryMarket.Collection prepare(signer: AuthAccount) { // if the account doesn't already have a collection if signer.borrow<&DarkCountry.Collection>(from: DarkCountry.CollectionStoragePath) == nil { // create a new empty collection let collection <- DarkCountry.createEmptyCollection() // save it to the account signer.save(<-collection, to: DarkCountry.CollectionStoragePath) // create a public capability for the collection signer.link<&DarkCountry.Collection{NonFungibleToken.CollectionPublic, DarkCountry.DarkCountryCollectionPublic}>(DarkCountry.CollectionPublicPath, target: DarkCountry.CollectionStoragePath) } // if the account doesn't already have a collection if signer.borrow<&DarkCountryMarket.Collection>(from: DarkCountryMarket.CollectionStoragePath) == nil { // create a new empty collection let collection <- DarkCountryMarket.createEmptyCollection() as! @DarkCountryMarket.Collection // save it to the account signer.save(<-collection, to: DarkCountryMarket.CollectionStoragePath) // create a public capability for the collection signer.link<&DarkCountryMarket.Collection{DarkCountryMarket.CollectionPublic}>(DarkCountryMarket.CollectionPublicPath, target: DarkCountryMarket.CollectionStoragePath) } // we need a provider capability, but one is not provided by default so we create one. let DarkCountryCollectionProviderPrivatePath = /private/darkCountryCollectionProvider self.flowVault = signer.getCapability<&FlowToken.Vault{FungibleToken.Receiver}>(/public/flowTokenReceiver)! assert(self.flowVault.borrow() != nil, message: "Missing or mis-typed Flow receiver") if !signer.getCapability<&DarkCountry.Collection{NonFungibleToken.Provider}>(DarkCountryCollectionProviderPrivatePath)!.check() { signer.link<&DarkCountry.Collection{NonFungibleToken.Provider}>(DarkCountryCollectionProviderPrivatePath, target: DarkCountry.CollectionStoragePath) } self.darkCountryCollection = signer.getCapability<&DarkCountry.Collection{NonFungibleToken.Provider}>(DarkCountryCollectionProviderPrivatePath)! assert(self.darkCountryCollection.borrow() != nil, message: "Missing or mis-typed DarkCountryCollection provider") self.marketCollection = signer.borrow<&DarkCountryMarket.Collection>(from: DarkCountryMarket.CollectionStoragePath) ?? panic("Missing or mis-typed DarkCountryMarket Collection") } execute { let offer <- DarkCountryMarket.createSaleOffer ( sellerItemProvider: self.darkCountryCollection, itemID: saleItemID, sellerPaymentReceiver: self.flowVault, price: saleItemPrice ) self.marketCollection.insert(offer: <-offer) } }

CODE_ERROR

Transaction