message: Delete useless calculations
diff: @@ -107,9 +107,7 @@ const getByteCount = (inputs, outputs) => {
  }
  type CalculateTxSizeParams = {
  - amount?: number
  - unspents?: any
  - address: string
  + unspents: IBtcUnspent[]
  txOutputs: number
  method?: string
  fixed?: boolean
  @@ -117,9 +115,7 @@ type CalculateTxSizeParams = {
  const calculateTxSize = async (params: CalculateTxSizeParams) => {
  let {
  - amount,
  unspents,
  - address,
  txOutputs,
  method,
  fixed,
  @@ -134,12 +130,6 @@ const calculateTxSize = async (params: CalculateTxSizeParams) => {
  return defaultTxSize
  }
  - unspents = unspents || await actions.btc.fetchUnspents(address)
  -
  - if (amount) {
  - unspents = await actions.btc.prepareUnspents({ amount, unspents })
  - }
  -
  const txIn = unspents.length
  let txSize = defaultTxSize
  // general formula
  @@ -237,11 +227,10 @@ const estimateFeeValue = async (params: EstimateFeeValueParams): Promise<any> =>
  feeRate = feeRate || await estimateFeeRate({ speed })
  txSize = txSize || await calculateTxSize({
  - address,
  fixed,
  method,
  txOutputs,
  - amount,
  + unspents,
  })
  const calculatedFeeValue = BigNumber.maximum(
  