import { Ecanna, BN, Buffer } from "ecanna/dist"
import {
  TKNVMAPI,
  KeyChain,
  UTXOSet,
  UnsignedTx,
  Tx
} from "ecanna/dist/apis/tknvm"
import { GetUTXOsResponse } from "ecanna/dist/apis/tknvm/interfaces"
import {
  PrivateKeyPrefix,
  DefaultLocalGenesisPrivateKey,
  Defaults,
  UnixNow
} from "ecanna/dist/utils"

const ip: string = "localhost"
const port: number = 9650
const protocol: string = "http"
const networkID: number = 1337
const ecanna: Ecanna = new Ecanna(ip, port, protocol, networkID)
const tknchain: TKNVMAPI = ecanna.TKNChain()
const xKeychain: KeyChain = tknchain.keyChain()
const privKey: string = `${PrivateKeyPrefix}${DefaultLocalGenesisPrivateKey}`
xKeychain.importKey(privKey)
const xAddressStrings: string[] = tknchain.keyChain().getAddressStrings()
const evmChainBlockchainID: string =
  Defaults.network[networkID].EVM.blockchainID
const threshold: number = 1
const locktime: BN = new BN(0)
const asOf: BN = UnixNow()
const memo: Buffer = Buffer.from(
  "TKNVM utility method buildImportTx to import ECNA to the TKN-Chain from the EVM-Chain"
)

const main = async (): Promise<any> => {
  const tknvmUTXOResponse: GetUTXOsResponse = await tknchain.getUTXOs(
    xAddressStrings,
    evmChainBlockchainID
  )
  const utxoSet: UTXOSet = tknvmUTXOResponse.utxos

  const unsignedTx: UnsignedTx = await tknchain.buildImportTx(
    utxoSet,
    xAddressStrings,
    evmChainBlockchainID,
    xAddressStrings,
    xAddressStrings,
    xAddressStrings,
    memo,
    asOf,
    locktime,
    threshold
  )
  const tx: Tx = unsignedTx.sign(xKeychain)
  const txid: string = await tknchain.issueTx(tx)
  console.log(`Success! TXID: ${txid}`)
}

main()