import FungibleToken from 0xf233dcee88fe0abe import FlowToken from 0x1654653399040a61 import TeleportedTetherToken from 0xcfdd90d4a00f7b5b import FlowSwapPair from 0xc6c77b9f5c7a378f transaction(maxAmountIn: UFix64, amountOut: UFix64) { prepare(signer: AuthAccount, proxyHolder: AuthAccount) { let amountIn = FlowSwapPair.quoteSwapToken1ForExactToken2(amount: amountOut) / (1.0 - FlowSwapPair.feePercentage) assert(amountIn < maxAmountIn, message: "Input amount too large") let flowVault = signer.borrow<&FlowToken.Vault>(from: /storage/flowTokenVault) ?? panic("Could not borrow a reference to Vault") let token1Vault <- flowVault.withdraw(amount: amountIn) as! @FlowToken.Vault if signer.borrow<&TeleportedTetherToken.Vault>(from: TeleportedTetherToken.TokenStoragePath) == nil { // Create a new teleportedTetherToken Vault and put it in storage signer.save(<-TeleportedTetherToken.createEmptyVault(), to: TeleportedTetherToken.TokenStoragePath) // Create a public capability to the Vault that only exposes // the deposit function through the Receiver interface signer.link<&TeleportedTetherToken.Vault{FungibleToken.Receiver}>( TeleportedTetherToken.TokenPublicReceiverPath, target: TeleportedTetherToken.TokenStoragePath ) // Create a public capability to the Vault that only exposes // the balance field through the Balance interface signer.link<&TeleportedTetherToken.Vault{FungibleToken.Balance}>( TeleportedTetherToken.TokenPublicBalancePath, target: TeleportedTetherToken.TokenStoragePath ) } let tetherVault = signer.borrow<&TeleportedTetherToken.Vault>(from: /storage/teleportedTetherTokenVault) ?? panic("Could not borrow a reference to Vault") let swapProxyRef = proxyHolder.borrow<&FlowSwapPair.SwapProxy>(from: /storage/flowUsdtSwapProxy) ?? panic("Could not borrow a reference to proxy holder") let token2Vault <- swapProxyRef.swapToken1ForToken2(from: <-token1Vault) tetherVault.deposit(from: <- token2Vault) } }

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