message: test: update assert_fee_amount() in test_framework/util.py
  update call to round() with satoshi_round() to avoid intermittent test failures
  rename fee_per_kB to feerate_BTC_kvB for precision
  store division result in feerate_BTC_vB
diff: @@ -34,13 +34,14 @@ def assert_approx(v, vexp, vspan=0.00001):
  raise AssertionError("%s > [%s..%s]" % (str(v), str(vexp - vspan), str(vexp + vspan)))
  -def assert_fee_amount(fee, tx_size, fee_per_kB):
  - """Assert the fee was in range"""
  - target_fee = round(tx_size * fee_per_kB / 1000, 8)
  +def assert_fee_amount(fee, tx_size, feerate_BTC_kvB):
  + """Assert the fee is in range."""
  + feerate_BTC_vB = feerate_BTC_kvB / 1000
  + target_fee = satoshi_round(tx_size * feerate_BTC_vB)
  if fee < target_fee:
  raise AssertionError("Fee of %s BTC too low! (Should be %s BTC)" % (str(fee), str(target_fee)))
  # allow the wallet's estimation to be at most 2 bytes off
  - if fee > (tx_size + 2) * fee_per_kB / 1000:
  + if fee > (tx_size + 2) * feerate_BTC_vB:
  raise AssertionError("Fee of %s BTC too high! (Should be %s BTC)" % (str(fee), str(target_fee)))
  