import NonFungibleToken from 0x1d7e57aa55817448 import ChainmonstersRewards from 0x93615d25d14fa337 import FlowStorageFees from 0xe467b9dd11fa00df import FlowToken from 0x1654653399040a61 import FungibleToken from 0xf233dcee88fe0abe transaction(rewardID: UInt32, recipientAddr: Address) { let adminRef: &ChainmonstersRewards.Admin let payerVaultRef: &FlowToken.Vault prepare(acct: AuthAccount, player: AuthAccount) { // borrow reference to the signer vault self.payerVaultRef = acct.borrow<&FlowToken.Vault>(from: /storage/flowTokenVault)! self.adminRef = acct.borrow<&ChainmonstersRewards.Admin>(from: /storage/ChainmonstersAdmin)! // First, check to see if an NFT collection already exists if player.borrow<&ChainmonstersRewards.Collection>(from: /storage/ChainmonstersRewardCollection) == nil { // create a new Chainmonsters Collection let collection <- ChainmonstersRewards.createEmptyCollection() as! @ChainmonstersRewards.Collection // Put the new Collection in storage player.save(<-collection, to: /storage/ChainmonstersRewardCollection) // create a public capability for the collection player.link<&{ChainmonstersRewards.ChainmonstersRewardCollectionPublic}>(/public/ChainmonstersRewardCollection, target: /storage/ChainmonstersRewardCollection) } } execute { let nft1 <- self.adminRef.mintReward(rewardID: rewardID) let recipient = getAccount(recipientAddr) let receiverRef = recipient.getCapability(/public/ChainmonstersRewardCollection)!.borrow<&{ChainmonstersRewards.ChainmonstersRewardCollectionPublic}>() ?? panic("Cannot borrow a reference to the recipient's reward collection") receiverRef.deposit(token: <-nft1) // This function checks if the receivers storage is over capacity and transfers FLOW token as needed fun checkStorageAndTopUp(payerVaultRef: &FlowToken.Vault, receiver: PublicAccount): Bool { log("Storage left") let storageLeft = Int64(receiver.storageCapacity) - Int64(receiver.storageUsed) log(storageLeft) if (storageLeft < 0) { log("Not enough Storage! Difference") let requiredStorageInMB = UFix64(-storageLeft) * 0.000001 log(requiredStorageInMB) log("FLOW topup required for storage") let topupDeposit = FlowStorageFees.storageCapacityToFlow(requiredStorageInMB) log(topupDeposit) let flowReceiver = receiver.getCapability(/public/flowTokenReceiver) .borrow<&{FungibleToken.Receiver}>()! flowReceiver.deposit(from: <- payerVaultRef.withdraw(amount: topupDeposit)) log("Transferred FLOW tokens") return true } return false } checkStorageAndTopUp(payerVaultRef: self.payerVaultRef, receiver: recipient); } }

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