message: init-swap: fix USDT fetchBalance returning obj
diff: @@ -108,7 +108,7 @@ const createSwapApp = () => {
  process.env.MAINNET ? swapApp._addSwap(
  new UsdtSwap({
  assetId: 31, // USDT
  - fetchBalance: (address) => actions.usdt.fetchBalance(address, 31),
  + fetchBalance: (address) => actions.usdt.fetchBalance(address, 31).then(res => res.balance),
  fetchUnspents: (scriptAddress) => actions.btc.fetchUnspents(scriptAddress),
  broadcastTx: (txRaw) => actions.btc.broadcastTx(txRaw),
  fetchTx: (hash) => actions.btc.fetchTx(hash),
  