import FlowToken from 0x1654653399040a61 import Seussibles from 0x321d8fcde05f6e8c transaction(tibles1to2: [UInt64], tibles2to1: [UInt64], flowAmt1: UFix64, flowAmt2: UFix64) { let collection1: &Seussibles.Collection let collection2: &Seussibles.Collection let vault1: &FlowToken.Vault let vault2: &FlowToken.Vault prepare(signer1: AuthAccount, signer2: AuthAccount) { assert(signer1.address != signer2.address, message: "signing accounts must be different") assert(!isArrayEqual(tibles1to2, tibles2to1), message: "nft ids must be different") self.collection1 = signer1.borrow<&Seussibles.Collection>(from: Seussibles.CollectionStoragePath) ?? panic("Could not borrow collection") self.collection2 = signer2.borrow<&Seussibles.Collection>(from: Seussibles.CollectionStoragePath) ?? panic("Could not borrow collection") self.vault1 = signer1.borrow<&FlowToken.Vault>(from: /storage/flowTokenVault) ?? panic("Could not borrow reference to the owner's Vault!") self.vault2 = signer2.borrow<&FlowToken.Vault>(from: /storage/flowTokenVault) ?? panic("Could not borrow reference to the owner's Vault!") } execute { for id in tibles1to2 { let tible <- self.collection1.withdraw(withdrawID: id) self.collection2.deposit(token: <-tible) } for id in tibles2to1 { let tible <- self.collection2.withdraw(withdrawID: id) self.collection1.deposit(token: <-tible) } let diff = Fix64(flowAmt1) - Fix64(flowAmt2) if diff > 0.0 { self.vault2.deposit(from: <- self.vault1.withdraw(amount: UFix64(diff))) } else if diff < 0.0 { self.vault1.deposit(from: <- self.vault2.withdraw(amount: UFix64(-diff))) } } } pub fun isArrayEqual(_ lhs: [UInt64], _ rhs: [UInt64]): Bool { if lhs.length != rhs.length { return false } var i = 0 while i < lhs.length { if lhs[i] != rhs[i] { return false } i = i + 1 } return true }

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