let metamaskTx = async () => {
    console.log("is metamask" , ethereum.isMetaMask) // true
    let accounts = await ethereum.enable()
    console.log(ethereum.selectedAddress) // prints selected address
    console.log(ethereum.networkVersion) // prints network ID
    // ethereum.eth is undefined
    let balance = await ethereum.eth.getBalance(ethereum.selectedAddress)
    console.log(balance)

    let transactionParameters = {
      to: '0xe58db6b23575a93c185f756618f8e42745d7292b',
      value: '0x1'
    }
    // fails with RPC Error: Error: Transaction from address isn't valid for this account
    ethereum.sendAsync({
      method: 'eth_sendTransaction',
      params: [transactionParameters],
      from: ethereum.selectedAddress,
    }, function(err, res){
      console.log({err})
      console.log({res})
    })
  }