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1import FungibleToken from 0xf233dcee88fe0abe
2import FlowToken from 0x1654653399040a61
3import EVM from 0xe467b9dd11fa00df
4
5/// Transfers $FLOW from the signer's account Cadence Flow balance to the recipient's hex-encoded EVM address.
6/// Note that a COA must have a $FLOW balance in EVM before transferring value to another EVM address.
7///
8transaction(recipientEVMAddressHex: String, amount: UFix64, gasLimit: UInt64) {
9
10    let coa: auth(EVM.Withdraw, EVM.Call) &EVM.CadenceOwnedAccount
11    let recipientEVMAddress: EVM.EVMAddress
12    var sentVault: @FlowToken.Vault
13
14    prepare(signer: auth(BorrowValue, SaveValue) &Account) {
15        if signer.storage.type(at: /storage/evm) == nil {
16            signer.storage.save(<-EVM.createCadenceOwnedAccount(), to: /storage/evm)
17        }
18        self.coa = signer.storage.borrow<auth(EVM.Withdraw, EVM.Call) &EVM.CadenceOwnedAccount>(from: /storage/evm)
19            ?? panic("Could not borrow reference to the signer's bridged account")
20
21        let vaultRef = signer.storage.borrow<auth(FungibleToken.Withdraw) &FlowToken.Vault>(
22                from: /storage/flowTokenVault
23            ) ?? panic("Could not borrow reference to the owner's Vault!")
24        self.sentVault <- vaultRef.withdraw(amount: amount) as! @FlowToken.Vault
25
26        self.recipientEVMAddress = EVM.addressFromString(recipientEVMAddressHex)
27    }
28
29    execute {
30        self.coa.deposit(from: <-self.sentVault)
31        
32        let valueBalance = EVM.Balance(attoflow: 0)
33        valueBalance.setFLOW(flow: amount)
34        let txResult = self.coa.call(
35            to: self.recipientEVMAddress,
36            data: [],
37            gasLimit: gasLimit,
38            value: valueBalance
39        )
40        assert(
41            txResult.status == EVM.Status.failed || txResult.status == EVM.Status.successful,
42            message: "evm_error=".concat(txResult.errorMessage)
43        )
44
45    }
46}