diff options
Diffstat (limited to 'test/functional/test_framework/util.py')
| -rw-r--r-- | test/functional/test_framework/util.py | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py index dabde13bf1..210025104e 100644 --- a/test/functional/test_framework/util.py +++ b/test/functional/test_framework/util.py @@ -36,6 +36,7 @@ def assert_approx(v, vexp, vspan=0.00001): def assert_fee_amount(fee, tx_size, feerate_BTC_kvB): """Assert the fee is in range.""" + assert isinstance(tx_size, int) target_fee = get_fee(tx_size, feerate_BTC_kvB) if fee < target_fee: raise AssertionError("Fee of %s BTC too low! (Should be %s BTC)" % (str(fee), str(target_fee))) @@ -219,7 +220,13 @@ def str_to_b64str(string): def ceildiv(a, b): - """Divide 2 ints and round up to next int rather than round down""" + """ + Divide 2 ints and round up to next int rather than round down + Implementation requires python integers, which have a // operator that does floor division. + Other types like decimal.Decimal whose // operator truncates towards 0 will not work. + """ + assert isinstance(a, int) + assert isinstance(b, int) return -(-a // b) @@ -227,7 +234,7 @@ def get_fee(tx_size, feerate_btc_kvb): """Calculate the fee in BTC given a feerate is BTC/kvB. Reflects CFeeRate::GetFee""" feerate_sat_kvb = int(feerate_btc_kvb * Decimal(1e8)) # Fee in sat/kvb as an int to avoid float precision errors target_fee_sat = ceildiv(feerate_sat_kvb * tx_size, 1000) # Round calculated fee up to nearest sat - return satoshi_round(target_fee_sat / Decimal(1e8)) # Truncate BTC result to nearest sat + return target_fee_sat / Decimal(1e8) # Return result in BTC def satoshi_round(amount): |