message: No more freeBalanceAddress
diff: @@ -3,7 +3,6 @@ import { database, logging, stateChannels } from '@graphprotocol/common-ts'
  import {
  EventPayloads,
  EventNames,
  - toBN,
  ConditionalTransferTypes,
  PublicParams,
  } from '@connext/types'
  @@ -14,6 +13,7 @@ import morgan from 'morgan'
  import { Stream } from 'stream'
  import { utils, Wallet } from 'ethers'
  import { signChannelMessage } from '@connext/crypto'
  +import { toBN } from '@connext/utils'
  const delay = (time: number) => new Promise(res => setTimeout(res, time))
  @@ -100,10 +100,10 @@ export default {
  // Obtain current free balance
  let freeBalance = await client.getFreeBalance(AddressZero)
  - let balance = freeBalance[client.freeBalanceAddress]
  + let balance = freeBalance[client.signerAddress]
  logger.info(`Channel free balance: ${utils.formatEther(balance)}`)
  - logger.info(`Signer address: ${client.freeBalanceAddress}`)
  + logger.info(`Signer address: ${client.signerAddress}`)
  logger.info(`xpub: ${client.publicIdentifier}`)
  const wallet = Wallet.fromMnemonic(argv.mnemonic, "m/44'/60'/0'/25446/0")
  