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1import EVM from 0xe467b9dd11fa00df
2import FungibleToken from 0xf233dcee88fe0abe
3import FlowToken from 0x1654653399040a61
4
5transaction(amount: UFix64) {
6    let auth: auth(Storage) &Account
7
8    prepare(signer: auth(Storage) &Account) {
9        self.auth = signer
10    }
11
12    execute {
13        // If the COA is already created & saved, there's nothing to do, just return.
14        if let coa = self.auth.storage.borrow<&EVM.CadenceOwnedAccount>(from: /storage/evm) {
15            return
16        }
17
18        let vaultRef = self.auth.storage.borrow<auth(FungibleToken.Withdraw) &FlowToken.Vault>(
19            from: /storage/flowTokenVault
20        ) ?? panic("Could not borrow reference to the owner's Vault!")
21        let vault <- vaultRef.withdraw(amount: amount) as! @FlowToken.Vault
22
23        let account <- EVM.createCadenceOwnedAccount()
24        account.deposit(from: <-vault)
25
26        self.auth.storage.save<@EVM.CadenceOwnedAccount>(
27            <-account,
28            to: /storage/evm
29        )
30    }
31}